diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs')
48 files changed, 1071 insertions, 187 deletions
diff --git a/tools/testing/selftests/bpf/progs/async_stack_depth.c b/tools/testing/selftests/bpf/progs/async_stack_depth.c index 3517c0e01206..36734683acbd 100644 --- a/tools/testing/selftests/bpf/progs/async_stack_depth.c +++ b/tools/testing/selftests/bpf/progs/async_stack_depth.c @@ -30,7 +30,7 @@ static int bad_timer_cb(void *map, int *key, struct bpf_timer *timer) } SEC("tc") -__failure __msg("combined stack size of 2 calls is 576. Too large") +__failure __msg("combined stack size of 2 calls is") int pseudo_call_check(struct __sk_buff *ctx) { struct hmap_elem *elem; @@ -45,7 +45,7 @@ int pseudo_call_check(struct __sk_buff *ctx) } SEC("tc") -__failure __msg("combined stack size of 2 calls is 608. Too large") +__failure __msg("combined stack size of 2 calls is") int async_call_root_check(struct __sk_buff *ctx) { struct hmap_elem *elem; diff --git a/tools/testing/selftests/bpf/progs/bpf_compiler.h b/tools/testing/selftests/bpf/progs/bpf_compiler.h new file mode 100644 index 000000000000..a7c343dc82e6 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_compiler.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __BPF_COMPILER_H__ +#define __BPF_COMPILER_H__ + +#define DO_PRAGMA_(X) _Pragma(#X) + +#if __clang__ +#define __pragma_loop_unroll DO_PRAGMA_(clang loop unroll(enable)) +#else +/* In GCC -funroll-loops, which is enabled with -O2, should have the + same impact than the loop-unroll-enable pragma above. */ +#define __pragma_loop_unroll +#endif + +#if __clang__ +#define __pragma_loop_unroll_count(N) DO_PRAGMA_(clang loop unroll_count(N)) +#else +#define __pragma_loop_unroll_count(N) DO_PRAGMA_(GCC unroll N) +#endif + +#if __clang__ +#define __pragma_loop_unroll_full DO_PRAGMA_(clang loop unroll(full)) +#else +#define __pragma_loop_unroll_full DO_PRAGMA_(GCC unroll 65534) +#endif + +#if __clang__ +#define __pragma_loop_no_unroll DO_PRAGMA_(clang loop unroll(disable)) +#else +#define __pragma_loop_no_unroll DO_PRAGMA_(GCC unroll 1) +#endif + +#endif diff --git a/tools/testing/selftests/bpf/progs/cgrp_ls_recursion.c b/tools/testing/selftests/bpf/progs/cgrp_ls_recursion.c index 610c2427fd93..3500e4b69ebe 100644 --- a/tools/testing/selftests/bpf/progs/cgrp_ls_recursion.c +++ b/tools/testing/selftests/bpf/progs/cgrp_ls_recursion.c @@ -27,32 +27,6 @@ bool is_cgroup1 = 0; struct cgroup *bpf_task_get_cgroup1(struct task_struct *task, int hierarchy_id) __ksym; void bpf_cgroup_release(struct cgroup *cgrp) __ksym; -static void __on_lookup(struct cgroup *cgrp) -{ - bpf_cgrp_storage_delete(&map_a, cgrp); - bpf_cgrp_storage_delete(&map_b, cgrp); -} - -SEC("fentry/bpf_local_storage_lookup") -int BPF_PROG(on_lookup) -{ - struct task_struct *task = bpf_get_current_task_btf(); - struct cgroup *cgrp; - - if (is_cgroup1) { - cgrp = bpf_task_get_cgroup1(task, target_hid); - if (!cgrp) - return 0; - - __on_lookup(cgrp); - bpf_cgroup_release(cgrp); - return 0; - } - - __on_lookup(task->cgroups->dfl_cgrp); - return 0; -} - static void __on_update(struct cgroup *cgrp) { long *ptr; diff --git a/tools/testing/selftests/bpf/progs/connect_unix_prog.c b/tools/testing/selftests/bpf/progs/connect_unix_prog.c index ca8aa2f116b3..2ef0e0c46d17 100644 --- a/tools/testing/selftests/bpf/progs/connect_unix_prog.c +++ b/tools/testing/selftests/bpf/progs/connect_unix_prog.c @@ -28,8 +28,7 @@ int connect_unix_prog(struct bpf_sock_addr *ctx) if (sa_kern->uaddrlen != unaddrlen) return 0; - sa_kern_unaddr = bpf_rdonly_cast(sa_kern->uaddr, - bpf_core_type_id_kernel(struct sockaddr_un)); + sa_kern_unaddr = bpf_core_cast(sa_kern->uaddr, struct sockaddr_un); if (memcmp(sa_kern_unaddr->sun_path, SERVUN_REWRITE_ADDRESS, sizeof(SERVUN_REWRITE_ADDRESS) - 1) != 0) return 0; diff --git a/tools/testing/selftests/bpf/progs/cpumask_common.h b/tools/testing/selftests/bpf/progs/cpumask_common.h index 0cd4aebb97cf..c705d8112a35 100644 --- a/tools/testing/selftests/bpf/progs/cpumask_common.h +++ b/tools/testing/selftests/bpf/progs/cpumask_common.h @@ -23,41 +23,42 @@ struct array_map { __uint(max_entries, 1); } __cpumask_map SEC(".maps"); -struct bpf_cpumask *bpf_cpumask_create(void) __ksym; -void bpf_cpumask_release(struct bpf_cpumask *cpumask) __ksym; -struct bpf_cpumask *bpf_cpumask_acquire(struct bpf_cpumask *cpumask) __ksym; -u32 bpf_cpumask_first(const struct cpumask *cpumask) __ksym; -u32 bpf_cpumask_first_zero(const struct cpumask *cpumask) __ksym; +struct bpf_cpumask *bpf_cpumask_create(void) __ksym __weak; +void bpf_cpumask_release(struct bpf_cpumask *cpumask) __ksym __weak; +struct bpf_cpumask *bpf_cpumask_acquire(struct bpf_cpumask *cpumask) __ksym __weak; +u32 bpf_cpumask_first(const struct cpumask *cpumask) __ksym __weak; +u32 bpf_cpumask_first_zero(const struct cpumask *cpumask) __ksym __weak; u32 bpf_cpumask_first_and(const struct cpumask *src1, - const struct cpumask *src2) __ksym; -void bpf_cpumask_set_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym; -void bpf_cpumask_clear_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym; -bool bpf_cpumask_test_cpu(u32 cpu, const struct cpumask *cpumask) __ksym; -bool bpf_cpumask_test_and_set_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym; -bool bpf_cpumask_test_and_clear_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym; -void bpf_cpumask_setall(struct bpf_cpumask *cpumask) __ksym; -void bpf_cpumask_clear(struct bpf_cpumask *cpumask) __ksym; + const struct cpumask *src2) __ksym __weak; +void bpf_cpumask_set_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym __weak; +void bpf_cpumask_clear_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym __weak; +bool bpf_cpumask_test_cpu(u32 cpu, const struct cpumask *cpumask) __ksym __weak; +bool bpf_cpumask_test_and_set_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym __weak; +bool bpf_cpumask_test_and_clear_cpu(u32 cpu, struct bpf_cpumask *cpumask) __ksym __weak; +void bpf_cpumask_setall(struct bpf_cpumask *cpumask) __ksym __weak; +void bpf_cpumask_clear(struct bpf_cpumask *cpumask) __ksym __weak; bool bpf_cpumask_and(struct bpf_cpumask *cpumask, const struct cpumask *src1, - const struct cpumask *src2) __ksym; + const struct cpumask *src2) __ksym __weak; void bpf_cpumask_or(struct bpf_cpumask *cpumask, const struct cpumask *src1, - const struct cpumask *src2) __ksym; + const struct cpumask *src2) __ksym __weak; void bpf_cpumask_xor(struct bpf_cpumask *cpumask, const struct cpumask *src1, - const struct cpumask *src2) __ksym; -bool bpf_cpumask_equal(const struct cpumask *src1, const struct cpumask *src2) __ksym; -bool bpf_cpumask_intersects(const struct cpumask *src1, const struct cpumask *src2) __ksym; -bool bpf_cpumask_subset(const struct cpumask *src1, const struct cpumask *src2) __ksym; -bool bpf_cpumask_empty(const struct cpumask *cpumask) __ksym; -bool bpf_cpumask_full(const struct cpumask *cpumask) __ksym; -void bpf_cpumask_copy(struct bpf_cpumask *dst, const struct cpumask *src) __ksym; -u32 bpf_cpumask_any_distribute(const struct cpumask *src) __ksym; -u32 bpf_cpumask_any_and_distribute(const struct cpumask *src1, const struct cpumask *src2) __ksym; -u32 bpf_cpumask_weight(const struct cpumask *cpumask) __ksym; - -void bpf_rcu_read_lock(void) __ksym; -void bpf_rcu_read_unlock(void) __ksym; + const struct cpumask *src2) __ksym __weak; +bool bpf_cpumask_equal(const struct cpumask *src1, const struct cpumask *src2) __ksym __weak; +bool bpf_cpumask_intersects(const struct cpumask *src1, const struct cpumask *src2) __ksym __weak; +bool bpf_cpumask_subset(const struct cpumask *src1, const struct cpumask *src2) __ksym __weak; +bool bpf_cpumask_empty(const struct cpumask *cpumask) __ksym __weak; +bool bpf_cpumask_full(const struct cpumask *cpumask) __ksym __weak; +void bpf_cpumask_copy(struct bpf_cpumask *dst, const struct cpumask *src) __ksym __weak; +u32 bpf_cpumask_any_distribute(const struct cpumask *src) __ksym __weak; +u32 bpf_cpumask_any_and_distribute(const struct cpumask *src1, + const struct cpumask *src2) __ksym __weak; +u32 bpf_cpumask_weight(const struct cpumask *cpumask) __ksym __weak; + +void bpf_rcu_read_lock(void) __ksym __weak; +void bpf_rcu_read_unlock(void) __ksym __weak; static inline const struct cpumask *cast(struct bpf_cpumask *cpumask) { diff --git a/tools/testing/selftests/bpf/progs/getpeername_unix_prog.c b/tools/testing/selftests/bpf/progs/getpeername_unix_prog.c index 9c078f34bbb2..5a76754f846b 100644 --- a/tools/testing/selftests/bpf/progs/getpeername_unix_prog.c +++ b/tools/testing/selftests/bpf/progs/getpeername_unix_prog.c @@ -27,8 +27,7 @@ int getpeername_unix_prog(struct bpf_sock_addr *ctx) if (sa_kern->uaddrlen != unaddrlen) return 1; - sa_kern_unaddr = bpf_rdonly_cast(sa_kern->uaddr, - bpf_core_type_id_kernel(struct sockaddr_un)); + sa_kern_unaddr = bpf_core_cast(sa_kern->uaddr, struct sockaddr_un); if (memcmp(sa_kern_unaddr->sun_path, SERVUN_REWRITE_ADDRESS, sizeof(SERVUN_REWRITE_ADDRESS) - 1) != 0) return 1; diff --git a/tools/testing/selftests/bpf/progs/getsockname_unix_prog.c b/tools/testing/selftests/bpf/progs/getsockname_unix_prog.c index ac7145111497..7867113c696f 100644 --- a/tools/testing/selftests/bpf/progs/getsockname_unix_prog.c +++ b/tools/testing/selftests/bpf/progs/getsockname_unix_prog.c @@ -27,8 +27,7 @@ int getsockname_unix_prog(struct bpf_sock_addr *ctx) if (sa_kern->uaddrlen != unaddrlen) return 1; - sa_kern_unaddr = bpf_rdonly_cast(sa_kern->uaddr, - bpf_core_type_id_kernel(struct sockaddr_un)); + sa_kern_unaddr = bpf_core_cast(sa_kern->uaddr, struct sockaddr_un); if (memcmp(sa_kern_unaddr->sun_path, SERVUN_REWRITE_ADDRESS, sizeof(SERVUN_REWRITE_ADDRESS) - 1) != 0) return 1; diff --git a/tools/testing/selftests/bpf/progs/iters.c b/tools/testing/selftests/bpf/progs/iters.c index 225f02dd66d0..3db416606f2f 100644 --- a/tools/testing/selftests/bpf/progs/iters.c +++ b/tools/testing/selftests/bpf/progs/iters.c @@ -5,6 +5,7 @@ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" +#include "bpf_compiler.h" #define ARRAY_SIZE(x) (int)(sizeof(x) / sizeof((x)[0])) @@ -183,7 +184,7 @@ int iter_pragma_unroll_loop(const void *ctx) MY_PID_GUARD(); bpf_iter_num_new(&it, 0, 2); -#pragma nounroll + __pragma_loop_no_unroll for (i = 0; i < 3; i++) { v = bpf_iter_num_next(&it); bpf_printk("ITER_BASIC: E3 VAL: i=%d v=%d", i, v ? *v : -1); @@ -238,7 +239,7 @@ int iter_multiple_sequential_loops(const void *ctx) bpf_iter_num_destroy(&it); bpf_iter_num_new(&it, 0, 2); -#pragma nounroll + __pragma_loop_no_unroll for (i = 0; i < 3; i++) { v = bpf_iter_num_next(&it); bpf_printk("ITER_BASIC: E3 VAL: i=%d v=%d", i, v ? *v : -1); diff --git a/tools/testing/selftests/bpf/progs/loop4.c b/tools/testing/selftests/bpf/progs/loop4.c index b35337926d66..0de0357f57cc 100644 --- a/tools/testing/selftests/bpf/progs/loop4.c +++ b/tools/testing/selftests/bpf/progs/loop4.c @@ -3,6 +3,8 @@ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> +#include "bpf_compiler.h" + char _license[] SEC("license") = "GPL"; SEC("socket") @@ -10,7 +12,7 @@ int combinations(volatile struct __sk_buff* skb) { int ret = 0, i; -#pragma nounroll + __pragma_loop_no_unroll for (i = 0; i < 20; i++) if (skb->len) ret |= 1 << i; diff --git a/tools/testing/selftests/bpf/progs/map_ptr_kern.c b/tools/testing/selftests/bpf/progs/map_ptr_kern.c index 3325da17ec81..efaf622c28dd 100644 --- a/tools/testing/selftests/bpf/progs/map_ptr_kern.c +++ b/tools/testing/selftests/bpf/progs/map_ptr_kern.c @@ -316,7 +316,7 @@ struct lpm_trie { } __attribute__((preserve_access_index)); struct lpm_key { - struct bpf_lpm_trie_key trie_key; + struct bpf_lpm_trie_key_hdr trie_key; __u32 data; }; diff --git a/tools/testing/selftests/bpf/progs/profiler.inc.h b/tools/testing/selftests/bpf/progs/profiler.inc.h index de3b6e4e4d0a..6957d9f2805e 100644 --- a/tools/testing/selftests/bpf/progs/profiler.inc.h +++ b/tools/testing/selftests/bpf/progs/profiler.inc.h @@ -8,6 +8,7 @@ #include "profiler.h" #include "err.h" #include "bpf_experimental.h" +#include "bpf_compiler.h" #ifndef NULL #define NULL 0 @@ -169,7 +170,7 @@ static INLINE int get_var_spid_index(struct var_kill_data_arr_t* arr_struct, int spid) { #ifdef UNROLL -#pragma unroll + __pragma_loop_unroll #endif for (int i = 0; i < ARRAY_SIZE(arr_struct->array); i++) if (arr_struct->array[i].meta.pid == spid) @@ -185,7 +186,7 @@ static INLINE void populate_ancestors(struct task_struct* task, ancestors_data->num_ancestors = 0; #ifdef UNROLL -#pragma unroll + __pragma_loop_unroll #endif for (num_ancestors = 0; num_ancestors < MAX_ANCESTORS; num_ancestors++) { parent = BPF_CORE_READ(parent, real_parent); @@ -212,7 +213,7 @@ static INLINE void* read_full_cgroup_path(struct kernfs_node* cgroup_node, size_t filepart_length; #ifdef UNROLL -#pragma unroll + __pragma_loop_unroll #endif for (int i = 0; i < MAX_CGROUPS_PATH_DEPTH; i++) { filepart_length = @@ -261,7 +262,7 @@ static INLINE void* populate_cgroup_info(struct cgroup_data_t* cgroup_data, int cgrp_id = bpf_core_enum_value(enum cgroup_subsys_id___local, pids_cgrp_id___local); #ifdef UNROLL -#pragma unroll + __pragma_loop_unroll #endif for (int i = 0; i < CGROUP_SUBSYS_COUNT; i++) { struct cgroup_subsys_state* subsys = @@ -402,7 +403,7 @@ static INLINE int trace_var_sys_kill(void* ctx, int tpid, int sig) if (kill_data == NULL) return 0; #ifdef UNROLL -#pragma unroll + __pragma_loop_unroll #endif for (int i = 0; i < ARRAY_SIZE(arr_struct->array); i++) if (arr_struct->array[i].meta.pid == 0) { @@ -482,7 +483,7 @@ read_absolute_file_path_from_dentry(struct dentry* filp_dentry, void* payload) struct dentry* parent_dentry; #ifdef UNROLL -#pragma unroll + __pragma_loop_unroll #endif for (int i = 0; i < MAX_PATH_DEPTH; i++) { filepart_length = @@ -508,7 +509,7 @@ is_ancestor_in_allowed_inodes(struct dentry* filp_dentry) { struct dentry* parent_dentry; #ifdef UNROLL -#pragma unroll + __pragma_loop_unroll #endif for (int i = 0; i < MAX_PATH_DEPTH; i++) { u64 dir_ino = BPF_CORE_READ(filp_dentry, d_inode, i_ino); @@ -629,7 +630,7 @@ int raw_tracepoint__sched_process_exit(void* ctx) struct kernfs_node* proc_kernfs = BPF_CORE_READ(task, cgroups, dfl_cgrp, kn); #ifdef UNROLL -#pragma unroll + __pragma_loop_unroll #endif for (int i = 0; i < ARRAY_SIZE(arr_struct->array); i++) { struct var_kill_data_t* past_kill_data = &arr_struct->array[i]; diff --git a/tools/testing/selftests/bpf/progs/pyperf.h b/tools/testing/selftests/bpf/progs/pyperf.h index 026d573ce179..86484f07e1d1 100644 --- a/tools/testing/selftests/bpf/progs/pyperf.h +++ b/tools/testing/selftests/bpf/progs/pyperf.h @@ -8,6 +8,7 @@ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" +#include "bpf_compiler.h" #define FUNCTION_NAME_LEN 64 #define FILE_NAME_LEN 128 @@ -298,11 +299,11 @@ int __on_event(struct bpf_raw_tracepoint_args *ctx) #if defined(USE_ITER) /* no for loop, no unrolling */ #elif defined(NO_UNROLL) -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll #elif defined(UNROLL_COUNT) -#pragma clang loop unroll_count(UNROLL_COUNT) + __pragma_loop_unroll_count(UNROLL_COUNT) #else -#pragma clang loop unroll(full) + __pragma_loop_unroll_full #endif /* NO_UNROLL */ /* Unwind python stack */ #ifdef USE_ITER diff --git a/tools/testing/selftests/bpf/progs/rcu_read_lock.c b/tools/testing/selftests/bpf/progs/rcu_read_lock.c index 14fb01437fb8..ab3a532b7dd6 100644 --- a/tools/testing/selftests/bpf/progs/rcu_read_lock.c +++ b/tools/testing/selftests/bpf/progs/rcu_read_lock.c @@ -319,3 +319,123 @@ int cross_rcu_region(void *ctx) bpf_rcu_read_unlock(); return 0; } + +__noinline +static int static_subprog(void *ctx) +{ + volatile int ret = 0; + + if (bpf_get_prandom_u32()) + return ret + 42; + return ret + bpf_get_prandom_u32(); +} + +__noinline +int global_subprog(u64 a) +{ + volatile int ret = a; + + return ret + static_subprog(NULL); +} + +__noinline +static int static_subprog_lock(void *ctx) +{ + volatile int ret = 0; + + bpf_rcu_read_lock(); + if (bpf_get_prandom_u32()) + return ret + 42; + return ret + bpf_get_prandom_u32(); +} + +__noinline +int global_subprog_lock(u64 a) +{ + volatile int ret = a; + + return ret + static_subprog_lock(NULL); +} + +__noinline +static int static_subprog_unlock(void *ctx) +{ + volatile int ret = 0; + + bpf_rcu_read_unlock(); + if (bpf_get_prandom_u32()) + return ret + 42; + return ret + bpf_get_prandom_u32(); +} + +__noinline +int global_subprog_unlock(u64 a) +{ + volatile int ret = a; + + return ret + static_subprog_unlock(NULL); +} + +SEC("?fentry.s/" SYS_PREFIX "sys_getpgid") +int rcu_read_lock_subprog(void *ctx) +{ + volatile int ret = 0; + + bpf_rcu_read_lock(); + if (bpf_get_prandom_u32()) + ret += static_subprog(ctx); + bpf_rcu_read_unlock(); + return 0; +} + +SEC("?fentry.s/" SYS_PREFIX "sys_getpgid") +int rcu_read_lock_global_subprog(void *ctx) +{ + volatile int ret = 0; + + bpf_rcu_read_lock(); + if (bpf_get_prandom_u32()) + ret += global_subprog(ret); + bpf_rcu_read_unlock(); + return 0; +} + +SEC("?fentry.s/" SYS_PREFIX "sys_getpgid") +int rcu_read_lock_subprog_lock(void *ctx) +{ + volatile int ret = 0; + + ret += static_subprog_lock(ctx); + bpf_rcu_read_unlock(); + return 0; +} + +SEC("?fentry.s/" SYS_PREFIX "sys_getpgid") +int rcu_read_lock_global_subprog_lock(void *ctx) +{ + volatile int ret = 0; + + ret += global_subprog_lock(ret); + bpf_rcu_read_unlock(); + return 0; +} + +SEC("?fentry.s/" SYS_PREFIX "sys_getpgid") +int rcu_read_lock_subprog_unlock(void *ctx) +{ + volatile int ret = 0; + + bpf_rcu_read_lock(); + ret += static_subprog_unlock(ctx); + return 0; +} + +SEC("?fentry.s/" SYS_PREFIX "sys_getpgid") +int rcu_read_lock_global_subprog_unlock(void *ctx) +{ + volatile int ret = 0; + + bpf_rcu_read_lock(); + ret += global_subprog_unlock(ret); + return 0; +} diff --git a/tools/testing/selftests/bpf/progs/recvmsg_unix_prog.c b/tools/testing/selftests/bpf/progs/recvmsg_unix_prog.c index 4dfbc8552558..1c7ab44bccfa 100644 --- a/tools/testing/selftests/bpf/progs/recvmsg_unix_prog.c +++ b/tools/testing/selftests/bpf/progs/recvmsg_unix_prog.c @@ -27,8 +27,7 @@ int recvmsg_unix_prog(struct bpf_sock_addr *ctx) if (sa_kern->uaddrlen != unaddrlen) return 1; - sa_kern_unaddr = bpf_rdonly_cast(sa_kern->uaddr, - bpf_core_type_id_kernel(struct sockaddr_un)); + sa_kern_unaddr = bpf_core_cast(sa_kern->uaddr, struct sockaddr_un); if (memcmp(sa_kern_unaddr->sun_path, SERVUN_ADDRESS, sizeof(SERVUN_ADDRESS) - 1) != 0) return 1; diff --git a/tools/testing/selftests/bpf/progs/sendmsg_unix_prog.c b/tools/testing/selftests/bpf/progs/sendmsg_unix_prog.c index 1f67e832666e..d8869b03dda9 100644 --- a/tools/testing/selftests/bpf/progs/sendmsg_unix_prog.c +++ b/tools/testing/selftests/bpf/progs/sendmsg_unix_prog.c @@ -28,8 +28,7 @@ int sendmsg_unix_prog(struct bpf_sock_addr *ctx) if (sa_kern->uaddrlen != unaddrlen) return 0; - sa_kern_unaddr = bpf_rdonly_cast(sa_kern->uaddr, - bpf_core_type_id_kernel(struct sockaddr_un)); + sa_kern_unaddr = bpf_core_cast(sa_kern->uaddr, struct sockaddr_un); if (memcmp(sa_kern_unaddr->sun_path, SERVUN_REWRITE_ADDRESS, sizeof(SERVUN_REWRITE_ADDRESS) - 1) != 0) return 0; diff --git a/tools/testing/selftests/bpf/progs/sk_storage_omem_uncharge.c b/tools/testing/selftests/bpf/progs/sk_storage_omem_uncharge.c index 3e745793b27a..46d6eb2a3b17 100644 --- a/tools/testing/selftests/bpf/progs/sk_storage_omem_uncharge.c +++ b/tools/testing/selftests/bpf/progs/sk_storage_omem_uncharge.c @@ -12,8 +12,6 @@ int cookie_found = 0; __u64 cookie = 0; __u32 omem = 0; -void *bpf_rdonly_cast(void *, __u32) __ksym; - struct { __uint(type, BPF_MAP_TYPE_SK_STORAGE); __uint(map_flags, BPF_F_NO_PREALLOC); @@ -29,7 +27,7 @@ int BPF_PROG(bpf_local_storage_destroy, struct bpf_local_storage *local_storage) if (local_storage_ptr != local_storage) return 0; - sk = bpf_rdonly_cast(sk_ptr, bpf_core_type_id_kernel(struct sock)); + sk = bpf_core_cast(sk_ptr, struct sock); if (sk->sk_cookie.counter != cookie) return 0; diff --git a/tools/testing/selftests/bpf/progs/sock_iter_batch.c b/tools/testing/selftests/bpf/progs/sock_iter_batch.c index ffbbfe1fa1c1..96531b0d9d55 100644 --- a/tools/testing/selftests/bpf/progs/sock_iter_batch.c +++ b/tools/testing/selftests/bpf/progs/sock_iter_batch.c @@ -32,7 +32,7 @@ int iter_tcp_soreuse(struct bpf_iter__tcp *ctx) if (!sk) return 0; - sk = bpf_rdonly_cast(sk, bpf_core_type_id_kernel(struct sock)); + sk = bpf_core_cast(sk, struct sock); if (sk->sk_family != AF_INET6 || sk->sk_state != TCP_LISTEN || !ipv6_addr_loopback(&sk->sk_v6_rcv_saddr)) @@ -68,7 +68,7 @@ int iter_udp_soreuse(struct bpf_iter__udp *ctx) if (!sk) return 0; - sk = bpf_rdonly_cast(sk, bpf_core_type_id_kernel(struct sock)); + sk = bpf_core_cast(sk, struct sock); if (sk->sk_family != AF_INET6 || !ipv6_addr_loopback(&sk->sk_v6_rcv_saddr)) return 0; diff --git a/tools/testing/selftests/bpf/progs/strobemeta.h b/tools/testing/selftests/bpf/progs/strobemeta.h index 40df2cc26eaf..f74459eead26 100644 --- a/tools/testing/selftests/bpf/progs/strobemeta.h +++ b/tools/testing/selftests/bpf/progs/strobemeta.h @@ -10,6 +10,8 @@ #include <linux/types.h> #include <bpf/bpf_helpers.h> +#include "bpf_compiler.h" + typedef uint32_t pid_t; struct task_struct {}; @@ -419,9 +421,9 @@ static __always_inline uint64_t read_map_var(struct strobemeta_cfg *cfg, } #ifdef NO_UNROLL -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll #else -#pragma unroll + __pragma_loop_unroll #endif for (int i = 0; i < STROBE_MAX_MAP_ENTRIES; ++i) { if (i >= map.cnt) @@ -560,25 +562,25 @@ static void *read_strobe_meta(struct task_struct *task, payload_off = sizeof(data->payload); #else #ifdef NO_UNROLL -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll #else -#pragma unroll + __pragma_loop_unroll #endif /* NO_UNROLL */ for (int i = 0; i < STROBE_MAX_INTS; ++i) { read_int_var(cfg, i, tls_base, &value, data); } #ifdef NO_UNROLL -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll #else -#pragma unroll + __pragma_loop_unroll #endif /* NO_UNROLL */ for (int i = 0; i < STROBE_MAX_STRS; ++i) { payload_off = read_str_var(cfg, i, tls_base, &value, data, payload_off); } #ifdef NO_UNROLL -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll #else -#pragma unroll + __pragma_loop_unroll #endif /* NO_UNROLL */ for (int i = 0; i < STROBE_MAX_MAPS; ++i) { payload_off = read_map_var(cfg, i, tls_base, &value, data, payload_off); diff --git a/tools/testing/selftests/bpf/progs/struct_ops_maybe_null.c b/tools/testing/selftests/bpf/progs/struct_ops_maybe_null.c new file mode 100644 index 000000000000..b450f72e744a --- /dev/null +++ b/tools/testing/selftests/bpf/progs/struct_ops_maybe_null.c @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ +#include <vmlinux.h> +#include <bpf/bpf_tracing.h> +#include "../bpf_testmod/bpf_testmod.h" + +char _license[] SEC("license") = "GPL"; + +pid_t tgid = 0; + +/* This is a test BPF program that uses struct_ops to access an argument + * that may be NULL. This is a test for the verifier to ensure that it can + * rip PTR_MAYBE_NULL correctly. + */ +SEC("struct_ops/test_maybe_null") +int BPF_PROG(test_maybe_null, int dummy, + struct task_struct *task) +{ + if (task) + tgid = task->tgid; + + return 0; +} + +SEC(".struct_ops.link") +struct bpf_testmod_ops testmod_1 = { + .test_maybe_null = (void *)test_maybe_null, +}; + diff --git a/tools/testing/selftests/bpf/progs/struct_ops_maybe_null_fail.c b/tools/testing/selftests/bpf/progs/struct_ops_maybe_null_fail.c new file mode 100644 index 000000000000..6283099ec383 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/struct_ops_maybe_null_fail.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ +#include <vmlinux.h> +#include <bpf/bpf_tracing.h> +#include "../bpf_testmod/bpf_testmod.h" + +char _license[] SEC("license") = "GPL"; + +pid_t tgid = 0; + +SEC("struct_ops/test_maybe_null_struct_ptr") +int BPF_PROG(test_maybe_null_struct_ptr, int dummy, + struct task_struct *task) +{ + tgid = task->tgid; + + return 0; +} + +SEC(".struct_ops.link") +struct bpf_testmod_ops testmod_struct_ptr = { + .test_maybe_null = (void *)test_maybe_null_struct_ptr, +}; + diff --git a/tools/testing/selftests/bpf/progs/struct_ops_module.c b/tools/testing/selftests/bpf/progs/struct_ops_module.c index e44ac55195ca..25952fa09348 100644 --- a/tools/testing/selftests/bpf/progs/struct_ops_module.c +++ b/tools/testing/selftests/bpf/progs/struct_ops_module.c @@ -16,15 +16,22 @@ int BPF_PROG(test_1) } SEC("struct_ops/test_2") -int BPF_PROG(test_2, int a, int b) +void BPF_PROG(test_2, int a, int b) { test_2_result = a + b; - return a + b; +} + +SEC("struct_ops/test_3") +int BPF_PROG(test_3, int a, int b) +{ + test_2_result = a + b + 3; + return a + b + 3; } SEC(".struct_ops.link") struct bpf_testmod_ops testmod_1 = { .test_1 = (void *)test_1, .test_2 = (void *)test_2, + .data = 0x1, }; diff --git a/tools/testing/selftests/bpf/progs/task_ls_recursion.c b/tools/testing/selftests/bpf/progs/task_ls_recursion.c index 4542dc683b44..f1853c38aada 100644 --- a/tools/testing/selftests/bpf/progs/task_ls_recursion.c +++ b/tools/testing/selftests/bpf/progs/task_ls_recursion.c @@ -27,23 +27,6 @@ struct { __type(value, long); } map_b SEC(".maps"); -SEC("fentry/bpf_local_storage_lookup") -int BPF_PROG(on_lookup) -{ - struct task_struct *task = bpf_get_current_task_btf(); - - if (!test_pid || task->pid != test_pid) - return 0; - - /* The bpf_task_storage_delete will call - * bpf_local_storage_lookup. The prog->active will - * stop the recursion. - */ - bpf_task_storage_delete(&map_a, task); - bpf_task_storage_delete(&map_b, task); - return 0; -} - SEC("fentry/bpf_local_storage_update") int BPF_PROG(on_update) { diff --git a/tools/testing/selftests/bpf/progs/test_cls_redirect.c b/tools/testing/selftests/bpf/progs/test_cls_redirect.c index 66b304982245..683c8aaa63da 100644 --- a/tools/testing/selftests/bpf/progs/test_cls_redirect.c +++ b/tools/testing/selftests/bpf/progs/test_cls_redirect.c @@ -20,8 +20,11 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> +#include "bpf_compiler.h" #include "test_cls_redirect.h" +#pragma GCC diagnostic ignored "-Waddress-of-packed-member" + #ifdef SUBPROGS #define INLINING __noinline #else @@ -267,7 +270,7 @@ static INLINING void pkt_ipv4_checksum(struct iphdr *iph) uint32_t acc = 0; uint16_t *ipw = (uint16_t *)iph; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (size_t i = 0; i < sizeof(struct iphdr) / 2; i++) { acc += ipw[i]; } @@ -294,7 +297,7 @@ bool pkt_skip_ipv6_extension_headers(buf_t *pkt, }; *is_fragment = false; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (int i = 0; i < 6; i++) { switch (exthdr.next) { case IPPROTO_FRAGMENT: diff --git a/tools/testing/selftests/bpf/progs/test_cls_redirect_dynptr.c b/tools/testing/selftests/bpf/progs/test_cls_redirect_dynptr.c index f41c81212ee9..da54c09e9a15 100644 --- a/tools/testing/selftests/bpf/progs/test_cls_redirect_dynptr.c +++ b/tools/testing/selftests/bpf/progs/test_cls_redirect_dynptr.c @@ -23,6 +23,8 @@ #include "test_cls_redirect.h" #include "bpf_kfuncs.h" +#pragma GCC diagnostic ignored "-Waddress-of-packed-member" + #define offsetofend(TYPE, MEMBER) \ (offsetof(TYPE, MEMBER) + sizeof((((TYPE *)0)->MEMBER))) diff --git a/tools/testing/selftests/bpf/progs/test_global_func1.c b/tools/testing/selftests/bpf/progs/test_global_func1.c index 17a9f59bf5f3..fc69ff18880d 100644 --- a/tools/testing/selftests/bpf/progs/test_global_func1.c +++ b/tools/testing/selftests/bpf/progs/test_global_func1.c @@ -5,7 +5,7 @@ #include <bpf/bpf_helpers.h> #include "bpf_misc.h" -#define MAX_STACK (512 - 3 * 32 + 8) +#define MAX_STACK 260 static __attribute__ ((noinline)) int f0(int var, struct __sk_buff *skb) @@ -30,6 +30,10 @@ int f3(int, struct __sk_buff *skb, int); __attribute__ ((noinline)) int f2(int val, struct __sk_buff *skb) { + volatile char buf[MAX_STACK] = {}; + + __sink(buf[MAX_STACK - 1]); + return f1(skb) + f3(val, skb, 1); } @@ -44,7 +48,7 @@ int f3(int val, struct __sk_buff *skb, int var) } SEC("tc") -__failure __msg("combined stack size of 4 calls is 544") +__failure __msg("combined stack size of 3 calls is") int global_func1(struct __sk_buff *skb) { return f0(1, skb) + f1(skb) + f2(2, skb) + f3(3, skb, 4); diff --git a/tools/testing/selftests/bpf/progs/test_global_func_ctx_args.c b/tools/testing/selftests/bpf/progs/test_global_func_ctx_args.c index 9a06e5eb1fbe..143c8a4852bf 100644 --- a/tools/testing/selftests/bpf/progs/test_global_func_ctx_args.c +++ b/tools/testing/selftests/bpf/progs/test_global_func_ctx_args.c @@ -26,6 +26,23 @@ int kprobe_typedef_ctx(void *ctx) return kprobe_typedef_ctx_subprog(ctx); } +/* s390x defines: + * + * typedef user_pt_regs bpf_user_pt_regs_t; + * typedef struct { ... } user_pt_regs; + * + * And so "canonical" underlying struct type is anonymous. + * So on s390x only valid ways to have PTR_TO_CTX argument in global subprogs + * are: + * - bpf_user_pt_regs_t *ctx (typedef); + * - struct bpf_user_pt_regs_t *ctx (backwards compatible struct hack); + * - void *ctx __arg_ctx (arg:ctx tag) + * + * Other architectures also allow using underlying struct types (e.g., + * `struct pt_regs *ctx` for x86-64) + */ +#ifndef bpf_target_s390 + #define pt_regs_struct_t typeof(*(__PT_REGS_CAST((struct pt_regs *)NULL))) __weak int kprobe_struct_ctx_subprog(pt_regs_struct_t *ctx) @@ -40,6 +57,8 @@ int kprobe_resolved_ctx(void *ctx) return kprobe_struct_ctx_subprog(ctx); } +#endif + /* this is current hack to make this work on old kernels */ struct bpf_user_pt_regs_t {}; diff --git a/tools/testing/selftests/bpf/progs/test_lwt_seg6local.c b/tools/testing/selftests/bpf/progs/test_lwt_seg6local.c index 48ff2b2ad5e7..fed66f36adb6 100644 --- a/tools/testing/selftests/bpf/progs/test_lwt_seg6local.c +++ b/tools/testing/selftests/bpf/progs/test_lwt_seg6local.c @@ -6,6 +6,8 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> +#include "bpf_compiler.h" + /* Packet parsing state machine helpers. */ #define cursor_advance(_cursor, _len) \ ({ void *_tmp = _cursor; _cursor += _len; _tmp; }) @@ -131,7 +133,7 @@ int is_valid_tlv_boundary(struct __sk_buff *skb, struct ip6_srh_t *srh, *pad_off = 0; // we can only go as far as ~10 TLVs due to the BPF max stack size - #pragma clang loop unroll(full) + __pragma_loop_unroll_full for (int i = 0; i < 10; i++) { struct sr6_tlv_t tlv; @@ -302,7 +304,7 @@ int __encap_srh(struct __sk_buff *skb) seg = (struct ip6_addr_t *)((char *)srh + sizeof(*srh)); - #pragma clang loop unroll(full) + __pragma_loop_unroll_full for (unsigned long long lo = 0; lo < 4; lo++) { seg->lo = bpf_cpu_to_be64(4 - lo); seg->hi = bpf_cpu_to_be64(hi); diff --git a/tools/testing/selftests/bpf/progs/test_ptr_untrusted.c b/tools/testing/selftests/bpf/progs/test_ptr_untrusted.c index 4bdd65b5aa2d..2fdc44e76624 100644 --- a/tools/testing/selftests/bpf/progs/test_ptr_untrusted.c +++ b/tools/testing/selftests/bpf/progs/test_ptr_untrusted.c @@ -6,13 +6,13 @@ char tp_name[128]; -SEC("lsm/bpf") +SEC("lsm.s/bpf") int BPF_PROG(lsm_run, int cmd, union bpf_attr *attr, unsigned int size) { switch (cmd) { case BPF_RAW_TRACEPOINT_OPEN: - bpf_probe_read_user_str(tp_name, sizeof(tp_name) - 1, - (void *)attr->raw_tracepoint.name); + bpf_copy_from_user(tp_name, sizeof(tp_name) - 1, + (void *)attr->raw_tracepoint.name); break; default: break; diff --git a/tools/testing/selftests/bpf/progs/test_seg6_loop.c b/tools/testing/selftests/bpf/progs/test_seg6_loop.c index a7278f064368..5059050f74f6 100644 --- a/tools/testing/selftests/bpf/progs/test_seg6_loop.c +++ b/tools/testing/selftests/bpf/progs/test_seg6_loop.c @@ -6,6 +6,8 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> +#include "bpf_compiler.h" + /* Packet parsing state machine helpers. */ #define cursor_advance(_cursor, _len) \ ({ void *_tmp = _cursor; _cursor += _len; _tmp; }) @@ -134,7 +136,7 @@ static __always_inline int is_valid_tlv_boundary(struct __sk_buff *skb, // we can only go as far as ~10 TLVs due to the BPF max stack size // workaround: define induction variable "i" as "long" instead // of "int" to prevent alu32 sub-register spilling. - #pragma clang loop unroll(disable) + __pragma_loop_no_unroll for (long i = 0; i < 100; i++) { struct sr6_tlv_t tlv; diff --git a/tools/testing/selftests/bpf/progs/test_skb_ctx.c b/tools/testing/selftests/bpf/progs/test_skb_ctx.c index c482110cfc95..a724a70c6700 100644 --- a/tools/testing/selftests/bpf/progs/test_skb_ctx.c +++ b/tools/testing/selftests/bpf/progs/test_skb_ctx.c @@ -3,12 +3,14 @@ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> +#include "bpf_compiler.h" + char _license[] SEC("license") = "GPL"; SEC("tc") int process(struct __sk_buff *skb) { - #pragma clang loop unroll(full) + __pragma_loop_unroll_full for (int i = 0; i < 5; i++) { if (skb->cb[i] != i + 1) return 1; diff --git a/tools/testing/selftests/bpf/progs/test_spin_lock.c b/tools/testing/selftests/bpf/progs/test_spin_lock.c index b2440a0ff422..d8d77bdffd3d 100644 --- a/tools/testing/selftests/bpf/progs/test_spin_lock.c +++ b/tools/testing/selftests/bpf/progs/test_spin_lock.c @@ -101,4 +101,69 @@ int bpf_spin_lock_test(struct __sk_buff *skb) err: return err; } + +struct bpf_spin_lock lockA __hidden SEC(".data.A"); + +__noinline +static int static_subprog(struct __sk_buff *ctx) +{ + volatile int ret = 0; + + if (ctx->protocol) + return ret; + return ret + ctx->len; +} + +__noinline +static int static_subprog_lock(struct __sk_buff *ctx) +{ + volatile int ret = 0; + + ret = static_subprog(ctx); + bpf_spin_lock(&lockA); + return ret + ctx->len; +} + +__noinline +static int static_subprog_unlock(struct __sk_buff *ctx) +{ + volatile int ret = 0; + + ret = static_subprog(ctx); + bpf_spin_unlock(&lockA); + return ret + ctx->len; +} + +SEC("tc") +int lock_static_subprog_call(struct __sk_buff *ctx) +{ + int ret = 0; + + bpf_spin_lock(&lockA); + if (ctx->mark == 42) + ret = static_subprog(ctx); + bpf_spin_unlock(&lockA); + return ret; +} + +SEC("tc") +int lock_static_subprog_lock(struct __sk_buff *ctx) +{ + int ret = 0; + + ret = static_subprog_lock(ctx); + bpf_spin_unlock(&lockA); + return ret; +} + +SEC("tc") +int lock_static_subprog_unlock(struct __sk_buff *ctx) +{ + int ret = 0; + + bpf_spin_lock(&lockA); + ret = static_subprog_unlock(ctx); + return ret; +} + char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/test_spin_lock_fail.c b/tools/testing/selftests/bpf/progs/test_spin_lock_fail.c index 86cd183ef6dc..43f40c4fe241 100644 --- a/tools/testing/selftests/bpf/progs/test_spin_lock_fail.c +++ b/tools/testing/selftests/bpf/progs/test_spin_lock_fail.c @@ -201,4 +201,48 @@ CHECK(innermapval_mapval, &iv->lock, &v->lock); #undef CHECK +__noinline +int global_subprog(struct __sk_buff *ctx) +{ + volatile int ret = 0; + + if (ctx->protocol) + ret += ctx->protocol; + return ret + ctx->mark; +} + +__noinline +static int static_subprog_call_global(struct __sk_buff *ctx) +{ + volatile int ret = 0; + + if (ctx->protocol) + return ret; + return ret + ctx->len + global_subprog(ctx); +} + +SEC("?tc") +int lock_global_subprog_call1(struct __sk_buff *ctx) +{ + int ret = 0; + + bpf_spin_lock(&lockA); + if (ctx->mark == 42) + ret = global_subprog(ctx); + bpf_spin_unlock(&lockA); + return ret; +} + +SEC("?tc") +int lock_global_subprog_call2(struct __sk_buff *ctx) +{ + int ret = 0; + + bpf_spin_lock(&lockA); + if (ctx->mark == 42) + ret = static_subprog_call_global(ctx); + bpf_spin_unlock(&lockA); + return ret; +} + char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/test_sysctl_loop1.c b/tools/testing/selftests/bpf/progs/test_sysctl_loop1.c index 553a282d816a..7f74077d6622 100644 --- a/tools/testing/selftests/bpf/progs/test_sysctl_loop1.c +++ b/tools/testing/selftests/bpf/progs/test_sysctl_loop1.c @@ -9,6 +9,8 @@ #include <bpf/bpf_helpers.h> +#include "bpf_compiler.h" + #ifndef ARRAY_SIZE #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) #endif @@ -30,7 +32,7 @@ static __always_inline int is_tcp_mem(struct bpf_sysctl *ctx) if (ret < 0 || ret != sizeof(tcp_mem_name) - 1) return 0; -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll for (i = 0; i < sizeof(tcp_mem_name); ++i) if (name[i] != tcp_mem_name[i]) return 0; @@ -59,7 +61,7 @@ int sysctl_tcp_mem(struct bpf_sysctl *ctx) if (ret < 0 || ret >= MAX_VALUE_STR_LEN) return 0; -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll for (i = 0; i < ARRAY_SIZE(tcp_mem); ++i) { ret = bpf_strtoul(value + off, MAX_ULONG_STR_LEN, 0, tcp_mem + i); diff --git a/tools/testing/selftests/bpf/progs/test_sysctl_loop2.c b/tools/testing/selftests/bpf/progs/test_sysctl_loop2.c index 2b64bc563a12..68a75436e8af 100644 --- a/tools/testing/selftests/bpf/progs/test_sysctl_loop2.c +++ b/tools/testing/selftests/bpf/progs/test_sysctl_loop2.c @@ -9,6 +9,8 @@ #include <bpf/bpf_helpers.h> +#include "bpf_compiler.h" + #ifndef ARRAY_SIZE #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) #endif @@ -30,7 +32,7 @@ static __attribute__((noinline)) int is_tcp_mem(struct bpf_sysctl *ctx) if (ret < 0 || ret != sizeof(tcp_mem_name) - 1) return 0; -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll for (i = 0; i < sizeof(tcp_mem_name); ++i) if (name[i] != tcp_mem_name[i]) return 0; @@ -57,7 +59,7 @@ int sysctl_tcp_mem(struct bpf_sysctl *ctx) if (ret < 0 || ret >= MAX_VALUE_STR_LEN) return 0; -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll for (i = 0; i < ARRAY_SIZE(tcp_mem); ++i) { ret = bpf_strtoul(value + off, MAX_ULONG_STR_LEN, 0, tcp_mem + i); diff --git a/tools/testing/selftests/bpf/progs/test_sysctl_prog.c b/tools/testing/selftests/bpf/progs/test_sysctl_prog.c index 5489823c83fc..efc3c61f7852 100644 --- a/tools/testing/selftests/bpf/progs/test_sysctl_prog.c +++ b/tools/testing/selftests/bpf/progs/test_sysctl_prog.c @@ -9,6 +9,8 @@ #include <bpf/bpf_helpers.h> +#include "bpf_compiler.h" + /* Max supported length of a string with unsigned long in base 10 (pow2 - 1). */ #define MAX_ULONG_STR_LEN 0xF @@ -31,7 +33,7 @@ static __always_inline int is_tcp_mem(struct bpf_sysctl *ctx) if (ret < 0 || ret != sizeof(tcp_mem_name) - 1) return 0; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (i = 0; i < sizeof(tcp_mem_name); ++i) if (name[i] != tcp_mem_name[i]) return 0; @@ -57,7 +59,7 @@ int sysctl_tcp_mem(struct bpf_sysctl *ctx) if (ret < 0 || ret >= MAX_VALUE_STR_LEN) return 0; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (i = 0; i < ARRAY_SIZE(tcp_mem); ++i) { ret = bpf_strtoul(value + off, MAX_ULONG_STR_LEN, 0, tcp_mem + i); diff --git a/tools/testing/selftests/bpf/progs/test_tc_tunnel.c b/tools/testing/selftests/bpf/progs/test_tc_tunnel.c index e6e678aa9874..404124a93892 100644 --- a/tools/testing/selftests/bpf/progs/test_tc_tunnel.c +++ b/tools/testing/selftests/bpf/progs/test_tc_tunnel.c @@ -19,6 +19,9 @@ #include <bpf/bpf_endian.h> #include <bpf/bpf_helpers.h> +#include "bpf_compiler.h" + +#pragma GCC diagnostic ignored "-Waddress-of-packed-member" static const int cfg_port = 8000; @@ -81,7 +84,7 @@ static __always_inline void set_ipv4_csum(struct iphdr *iph) iph->check = 0; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (i = 0, csum = 0; i < sizeof(*iph) >> 1; i++) csum += *iph16++; diff --git a/tools/testing/selftests/bpf/progs/test_tcp_custom_syncookie.c b/tools/testing/selftests/bpf/progs/test_tcp_custom_syncookie.c index a5501b29979a..c8e4553648bf 100644 --- a/tools/testing/selftests/bpf/progs/test_tcp_custom_syncookie.c +++ b/tools/testing/selftests/bpf/progs/test_tcp_custom_syncookie.c @@ -10,6 +10,8 @@ #include "test_siphash.h" #include "test_tcp_custom_syncookie.h" +#define MAX_PACKET_OFF 0xffff + /* Hash is calculated for each client and split into ISN and TS. * * MSB LSB @@ -52,16 +54,15 @@ static siphash_key_t test_key_siphash = { struct tcp_syncookie { struct __sk_buff *skb; + void *data; void *data_end; struct ethhdr *eth; struct iphdr *ipv4; struct ipv6hdr *ipv6; struct tcphdr *tcp; - union { - char *ptr; - __be32 *ptr32; - }; + __be32 *ptr32; struct bpf_tcp_req_attrs attrs; + u32 off; u32 cookie; u64 first; }; @@ -70,6 +71,7 @@ bool handled_syn, handled_ack; static int tcp_load_headers(struct tcp_syncookie *ctx) { + ctx->data = (void *)(long)ctx->skb->data; ctx->data_end = (void *)(long)ctx->skb->data_end; ctx->eth = (struct ethhdr *)(long)ctx->skb->data; @@ -134,6 +136,7 @@ static int tcp_reload_headers(struct tcp_syncookie *ctx) if (bpf_skb_change_tail(ctx->skb, data_len + 60 - ctx->tcp->doff * 4, 0)) goto err; + ctx->data = (void *)(long)ctx->skb->data; ctx->data_end = (void *)(long)ctx->skb->data_end; ctx->eth = (struct ethhdr *)(long)ctx->skb->data; if (ctx->ipv4) { @@ -195,47 +198,68 @@ err: return -1; } -static int tcp_parse_option(__u32 index, struct tcp_syncookie *ctx) +static __always_inline void *next(struct tcp_syncookie *ctx, __u32 sz) { - char opcode, opsize; + __u64 off = ctx->off; + __u8 *data; - if (ctx->ptr + 1 > ctx->data_end) - goto stop; + /* Verifier forbids access to packet when offset exceeds MAX_PACKET_OFF */ + if (off > MAX_PACKET_OFF - sz) + return NULL; + + data = ctx->data + off; + barrier_var(data); + if (data + sz >= ctx->data_end) + return NULL; - opcode = *ctx->ptr++; + ctx->off += sz; + return data; +} - if (opcode == TCPOPT_EOL) +static int tcp_parse_option(__u32 index, struct tcp_syncookie *ctx) +{ + __u8 *opcode, *opsize, *wscale; + __u32 *tsval, *tsecr; + __u16 *mss; + __u32 off; + + off = ctx->off; + opcode = next(ctx, 1); + if (!opcode) goto stop; - if (opcode == TCPOPT_NOP) + if (*opcode == TCPOPT_EOL) + goto stop; + + if (*opcode == TCPOPT_NOP) goto next; - if (ctx->ptr + 1 > ctx->data_end) + opsize = next(ctx, 1); + if (!opsize) goto stop; - opsize = *ctx->ptr++; - - if (opsize < 2) + if (*opsize < 2) goto stop; - switch (opcode) { + switch (*opcode) { case TCPOPT_MSS: - if (opsize == TCPOLEN_MSS && ctx->tcp->syn && - ctx->ptr + (TCPOLEN_MSS - 2) < ctx->data_end) - ctx->attrs.mss = get_unaligned_be16(ctx->ptr); + mss = next(ctx, 2); + if (*opsize == TCPOLEN_MSS && ctx->tcp->syn && mss) + ctx->attrs.mss = get_unaligned_be16(mss); break; case TCPOPT_WINDOW: - if (opsize == TCPOLEN_WINDOW && ctx->tcp->syn && - ctx->ptr + (TCPOLEN_WINDOW - 2) < ctx->data_end) { + wscale = next(ctx, 1); + if (*opsize == TCPOLEN_WINDOW && ctx->tcp->syn && wscale) { ctx->attrs.wscale_ok = 1; - ctx->attrs.snd_wscale = *ctx->ptr; + ctx->attrs.snd_wscale = *wscale; } break; case TCPOPT_TIMESTAMP: - if (opsize == TCPOLEN_TIMESTAMP && - ctx->ptr + (TCPOLEN_TIMESTAMP - 2) < ctx->data_end) { - ctx->attrs.rcv_tsval = get_unaligned_be32(ctx->ptr); - ctx->attrs.rcv_tsecr = get_unaligned_be32(ctx->ptr + 4); + tsval = next(ctx, 4); + tsecr = next(ctx, 4); + if (*opsize == TCPOLEN_TIMESTAMP && tsval && tsecr) { + ctx->attrs.rcv_tsval = get_unaligned_be32(tsval); + ctx->attrs.rcv_tsecr = get_unaligned_be32(tsecr); if (ctx->tcp->syn && ctx->attrs.rcv_tsecr) ctx->attrs.tstamp_ok = 0; @@ -244,13 +268,12 @@ static int tcp_parse_option(__u32 index, struct tcp_syncookie *ctx) } break; case TCPOPT_SACK_PERM: - if (opsize == TCPOLEN_SACK_PERM && ctx->tcp->syn && - ctx->ptr + (TCPOLEN_SACK_PERM - 2) < ctx->data_end) + if (*opsize == TCPOLEN_SACK_PERM && ctx->tcp->syn) ctx->attrs.sack_ok = 1; break; } - ctx->ptr += opsize - 2; + ctx->off = off + *opsize; next: return 0; stop: @@ -259,7 +282,7 @@ stop: static void tcp_parse_options(struct tcp_syncookie *ctx) { - ctx->ptr = (char *)(ctx->tcp + 1); + ctx->off = (__u8 *)(ctx->tcp + 1) - (__u8 *)ctx->data, bpf_loop(40, tcp_parse_option, ctx, 0); } diff --git a/tools/testing/selftests/bpf/progs/test_xdp.c b/tools/testing/selftests/bpf/progs/test_xdp.c index d7a9a74b7245..8caf58be5818 100644 --- a/tools/testing/selftests/bpf/progs/test_xdp.c +++ b/tools/testing/selftests/bpf/progs/test_xdp.c @@ -19,6 +19,7 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> #include "test_iptunnel_common.h" +#include "bpf_compiler.h" struct { __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); @@ -137,7 +138,7 @@ static __always_inline int handle_ipv4(struct xdp_md *xdp) iph->ttl = 8; next_iph = (__u16 *)iph; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (i = 0; i < sizeof(*iph) >> 1; i++) csum += *next_iph++; diff --git a/tools/testing/selftests/bpf/progs/test_xdp_loop.c b/tools/testing/selftests/bpf/progs/test_xdp_loop.c index c98fb44156f0..93267a68825b 100644 --- a/tools/testing/selftests/bpf/progs/test_xdp_loop.c +++ b/tools/testing/selftests/bpf/progs/test_xdp_loop.c @@ -15,6 +15,7 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> #include "test_iptunnel_common.h" +#include "bpf_compiler.h" struct { __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); @@ -133,7 +134,7 @@ static __always_inline int handle_ipv4(struct xdp_md *xdp) iph->ttl = 8; next_iph = (__u16 *)iph; -#pragma clang loop unroll(disable) + __pragma_loop_no_unroll for (i = 0; i < sizeof(*iph) >> 1; i++) csum += *next_iph++; diff --git a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c index 42c8f6ded0e4..5c7e4758a0ca 100644 --- a/tools/testing/selftests/bpf/progs/test_xdp_noinline.c +++ b/tools/testing/selftests/bpf/progs/test_xdp_noinline.c @@ -15,6 +15,7 @@ #include <linux/udp.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> +#include "bpf_compiler.h" static __always_inline __u32 rol32(__u32 word, unsigned int shift) { @@ -362,7 +363,7 @@ bool encap_v4(struct xdp_md *xdp, struct ctl_value *cval, iph->ttl = 4; next_iph_u16 = (__u16 *) iph; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (int i = 0; i < sizeof(struct iphdr) >> 1; i++) csum += *next_iph_u16++; iph->check = ~((csum & 0xffff) + (csum >> 16)); @@ -409,7 +410,7 @@ int send_icmp_reply(void *data, void *data_end) iph->saddr = tmp_addr; iph->check = 0; next_iph_u16 = (__u16 *) iph; -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (int i = 0; i < sizeof(struct iphdr) >> 1; i++) csum += *next_iph_u16++; iph->check = ~((csum & 0xffff) + (csum >> 16)); diff --git a/tools/testing/selftests/bpf/progs/tracing_failure.c b/tools/testing/selftests/bpf/progs/tracing_failure.c new file mode 100644 index 000000000000..d41665d2ec8c --- /dev/null +++ b/tools/testing/selftests/bpf/progs/tracing_failure.c @@ -0,0 +1,20 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ + +#include "vmlinux.h" +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +char _license[] SEC("license") = "GPL"; + +SEC("?fentry/bpf_spin_lock") +int BPF_PROG(test_spin_lock, struct bpf_spin_lock *lock) +{ + return 0; +} + +SEC("?fentry/bpf_spin_unlock") +int BPF_PROG(test_spin_unlock, struct bpf_spin_lock *lock) +{ + return 0; +} diff --git a/tools/testing/selftests/bpf/progs/type_cast.c b/tools/testing/selftests/bpf/progs/type_cast.c index a9629ac230fd..9d808b8f4ab0 100644 --- a/tools/testing/selftests/bpf/progs/type_cast.c +++ b/tools/testing/selftests/bpf/progs/type_cast.c @@ -4,6 +4,7 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> #include <bpf/bpf_core_read.h> +#include "bpf_kfuncs.h" struct { __uint(type, BPF_MAP_TYPE_TASK_STORAGE); @@ -19,9 +20,6 @@ char name[IFNAMSIZ]; unsigned int inum; unsigned int meta_len, frag0_len, kskb_len, kskb2_len; -void *bpf_cast_to_kern_ctx(void *) __ksym; -void *bpf_rdonly_cast(void *, __u32) __ksym; - SEC("?xdp") int md_xdp(struct xdp_md *ctx) { @@ -48,13 +46,12 @@ int md_skb(struct __sk_buff *skb) /* Simulate the following kernel macro: * #define skb_shinfo(SKB) ((struct skb_shared_info *)(skb_end_pointer(SKB))) */ - shared_info = bpf_rdonly_cast(kskb->head + kskb->end, - bpf_core_type_id_kernel(struct skb_shared_info)); + shared_info = bpf_core_cast(kskb->head + kskb->end, struct skb_shared_info); meta_len = shared_info->meta_len; frag0_len = shared_info->frag_list->len; /* kskb2 should be equal to kskb */ - kskb2 = bpf_rdonly_cast(kskb, bpf_core_type_id_kernel(struct sk_buff)); + kskb2 = bpf_core_cast(kskb, typeof(*kskb2)); kskb2_len = kskb2->len; return 0; } @@ -65,7 +62,7 @@ int BPF_PROG(untrusted_ptr, struct pt_regs *regs, long id) struct task_struct *task, *task_dup; task = bpf_get_current_task_btf(); - task_dup = bpf_rdonly_cast(task, bpf_core_type_id_kernel(struct task_struct)); + task_dup = bpf_core_cast(task, struct task_struct); (void)bpf_task_storage_get(&enter_id, task_dup, 0, 0); return 0; } @@ -73,7 +70,7 @@ int BPF_PROG(untrusted_ptr, struct pt_regs *regs, long id) SEC("?tracepoint/syscalls/sys_enter_nanosleep") int kctx_u64(void *ctx) { - u64 *kctx = bpf_rdonly_cast(ctx, bpf_core_type_id_kernel(u64)); + u64 *kctx = bpf_core_cast(ctx, u64); (void)kctx; return 0; diff --git a/tools/testing/selftests/bpf/progs/verifier_global_ptr_args.c b/tools/testing/selftests/bpf/progs/verifier_global_ptr_args.c new file mode 100644 index 000000000000..4ab0ef18d7eb --- /dev/null +++ b/tools/testing/selftests/bpf/progs/verifier_global_ptr_args.c @@ -0,0 +1,182 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ + +#include <vmlinux.h> +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> +#include <bpf/bpf_core_read.h> +#include "bpf_misc.h" +#include "xdp_metadata.h" +#include "bpf_kfuncs.h" + +extern struct task_struct *bpf_task_acquire(struct task_struct *p) __ksym __weak; +extern void bpf_task_release(struct task_struct *p) __ksym __weak; + +__weak int subprog_trusted_task_nullable(struct task_struct *task __arg_trusted __arg_nullable) +{ + if (!task) + return 0; + return task->pid + task->tgid; +} + +__weak int subprog_trusted_task_nullable_extra_layer(struct task_struct *task __arg_trusted __arg_nullable) +{ + return subprog_trusted_task_nullable(task) + subprog_trusted_task_nullable(NULL); +} + +SEC("?tp_btf/task_newtask") +__success __log_level(2) +__msg("Validating subprog_trusted_task_nullable() func#1...") +__msg(": R1=trusted_ptr_or_null_task_struct(") +int trusted_task_arg_nullable(void *ctx) +{ + struct task_struct *t1 = bpf_get_current_task_btf(); + struct task_struct *t2 = bpf_task_acquire(t1); + int res = 0; + + /* known NULL */ + res += subprog_trusted_task_nullable(NULL); + + /* known non-NULL */ + res += subprog_trusted_task_nullable(t1); + res += subprog_trusted_task_nullable_extra_layer(t1); + + /* unknown if NULL or not */ + res += subprog_trusted_task_nullable(t2); + res += subprog_trusted_task_nullable_extra_layer(t2); + + if (t2) { + /* known non-NULL after explicit NULL check, just in case */ + res += subprog_trusted_task_nullable(t2); + res += subprog_trusted_task_nullable_extra_layer(t2); + + bpf_task_release(t2); + } + + return res; +} + +__weak int subprog_trusted_task_nonnull(struct task_struct *task __arg_trusted) +{ + return task->pid + task->tgid; +} + +SEC("?kprobe") +__failure __log_level(2) +__msg("R1 type=scalar expected=ptr_, trusted_ptr_, rcu_ptr_") +__msg("Caller passes invalid args into func#1 ('subprog_trusted_task_nonnull')") +int trusted_task_arg_nonnull_fail1(void *ctx) +{ + return subprog_trusted_task_nonnull(NULL); +} + +SEC("?tp_btf/task_newtask") +__failure __log_level(2) +__msg("R1 type=ptr_or_null_ expected=ptr_, trusted_ptr_, rcu_ptr_") +__msg("Caller passes invalid args into func#1 ('subprog_trusted_task_nonnull')") +int trusted_task_arg_nonnull_fail2(void *ctx) +{ + struct task_struct *t = bpf_get_current_task_btf(); + struct task_struct *nullable; + int res; + + nullable = bpf_task_acquire(t); + + /* should fail, PTR_TO_BTF_ID_OR_NULL */ + res = subprog_trusted_task_nonnull(nullable); + + if (nullable) + bpf_task_release(nullable); + + return res; +} + +SEC("?kprobe") +__success __log_level(2) +__msg("Validating subprog_trusted_task_nonnull() func#1...") +__msg(": R1=trusted_ptr_task_struct(") +int trusted_task_arg_nonnull(void *ctx) +{ + struct task_struct *t = bpf_get_current_task_btf(); + + return subprog_trusted_task_nonnull(t); +} + +struct task_struct___local {} __attribute__((preserve_access_index)); + +__weak int subprog_nullable_task_flavor( + struct task_struct___local *task __arg_trusted __arg_nullable) +{ + char buf[16]; + + if (!task) + return 0; + + return bpf_copy_from_user_task(&buf, sizeof(buf), NULL, (void *)task, 0); +} + +SEC("?uprobe.s") +__success __log_level(2) +__msg("Validating subprog_nullable_task_flavor() func#1...") +__msg(": R1=trusted_ptr_or_null_task_struct(") +int flavor_ptr_nullable(void *ctx) +{ + struct task_struct___local *t = (void *)bpf_get_current_task_btf(); + + return subprog_nullable_task_flavor(t); +} + +__weak int subprog_nonnull_task_flavor(struct task_struct___local *task __arg_trusted) +{ + char buf[16]; + + return bpf_copy_from_user_task(&buf, sizeof(buf), NULL, (void *)task, 0); +} + +SEC("?uprobe.s") +__success __log_level(2) +__msg("Validating subprog_nonnull_task_flavor() func#1...") +__msg(": R1=trusted_ptr_task_struct(") +int flavor_ptr_nonnull(void *ctx) +{ + struct task_struct *t = bpf_get_current_task_btf(); + + return subprog_nonnull_task_flavor((void *)t); +} + +__weak int subprog_trusted_destroy(struct task_struct *task __arg_trusted) +{ + bpf_task_release(task); /* should be rejected */ + + return 0; +} + +SEC("?tp_btf/task_newtask") +__failure __log_level(2) +__msg("release kernel function bpf_task_release expects refcounted PTR_TO_BTF_ID") +int BPF_PROG(trusted_destroy_fail, struct task_struct *task, u64 clone_flags) +{ + return subprog_trusted_destroy(task); +} + +__weak int subprog_trusted_acq_rel(struct task_struct *task __arg_trusted) +{ + struct task_struct *owned; + + owned = bpf_task_acquire(task); + if (!owned) + return 0; + + bpf_task_release(owned); /* this one is OK, we acquired it locally */ + + return 0; +} + +SEC("?tp_btf/task_newtask") +__success __log_level(2) +int BPF_PROG(trusted_acq_rel, struct task_struct *task, u64 clone_flags) +{ + return subprog_trusted_acq_rel(task); +} + +char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/verifier_global_subprogs.c b/tools/testing/selftests/bpf/progs/verifier_global_subprogs.c index 67dddd941891..baff5ffe9405 100644 --- a/tools/testing/selftests/bpf/progs/verifier_global_subprogs.c +++ b/tools/testing/selftests/bpf/progs/verifier_global_subprogs.c @@ -115,6 +115,35 @@ int arg_tag_nullable_ptr_fail(void *ctx) return subprog_nullable_ptr_bad(&x); } +typedef struct { + int x; +} user_struct_t; + +__noinline __weak int subprog_user_anon_mem(user_struct_t *t) +{ + return t ? t->x : 0; +} + +SEC("?tracepoint") +__failure __log_level(2) +__msg("invalid bpf_context access") +__msg("Caller passes invalid args into func#1 ('subprog_user_anon_mem')") +int anon_user_mem_invalid(void *ctx) +{ + /* can't pass PTR_TO_CTX as user memory */ + return subprog_user_anon_mem(ctx); +} + +SEC("?tracepoint") +__success __log_level(2) +__msg("Func#1 ('subprog_user_anon_mem') is safe for any args that match its prototype") +int anon_user_mem_valid(void *ctx) +{ + user_struct_t t = { .x = 42 }; + + return subprog_user_anon_mem(&t); +} + __noinline __weak int subprog_nonnull_ptr_good(int *p1 __arg_nonnull, int *p2 __arg_nonnull) { return (*p1) * (*p2); /* good, no need for NULL checks */ diff --git a/tools/testing/selftests/bpf/progs/verifier_spill_fill.c b/tools/testing/selftests/bpf/progs/verifier_spill_fill.c index 7013a9694163..85e48069c9e6 100644 --- a/tools/testing/selftests/bpf/progs/verifier_spill_fill.c +++ b/tools/testing/selftests/bpf/progs/verifier_spill_fill.c @@ -217,7 +217,7 @@ __naked void uninit_u32_from_the_stack(void) SEC("tc") __description("Spill a u32 const scalar. Refill as u16. Offset to skb->data") -__failure __msg("invalid access to packet") +__success __retval(0) __naked void u16_offset_to_skb_data(void) { asm volatile (" \ @@ -225,13 +225,19 @@ __naked void u16_offset_to_skb_data(void) r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \ w4 = 20; \ *(u32*)(r10 - 8) = r4; \ - r4 = *(u16*)(r10 - 8); \ + " +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r4 = *(u16*)(r10 - 8);" +#else + "r4 = *(u16*)(r10 - 6);" +#endif + " \ r0 = r2; \ - /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=65535 */\ + /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=20 */\ r0 += r4; \ - /* if (r0 > r3) R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=umax=65535 */\ + /* if (r0 > r3) R0=pkt,off=20 R2=pkt R3=pkt_end R4=20 */\ if r0 > r3 goto l0_%=; \ - /* r0 = *(u32 *)r2 R0=pkt,umax=65535 R2=pkt R3=pkt_end R4=20 */\ + /* r0 = *(u32 *)r2 R0=pkt,off=20 R2=pkt R3=pkt_end R4=20 */\ r0 = *(u32*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ @@ -268,7 +274,7 @@ l0_%=: r0 = 0; \ } SEC("tc") -__description("Spill a u32 const scalar. Refill as u16 from fp-6. Offset to skb->data") +__description("Spill a u32 const scalar. Refill as u16 from MSB. Offset to skb->data") __failure __msg("invalid access to packet") __naked void _6_offset_to_skb_data(void) { @@ -277,7 +283,13 @@ __naked void _6_offset_to_skb_data(void) r3 = *(u32*)(r1 + %[__sk_buff_data_end]); \ w4 = 20; \ *(u32*)(r10 - 8) = r4; \ - r4 = *(u16*)(r10 - 6); \ + " +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r4 = *(u16*)(r10 - 6);" +#else + "r4 = *(u16*)(r10 - 8);" +#endif + " \ r0 = r2; \ /* r0 += r4 R0=pkt R2=pkt R3=pkt_end R4=umax=65535 */\ r0 += r4; \ @@ -452,9 +464,9 @@ l0_%=: r1 >>= 16; \ SEC("raw_tp") __log_level(2) __success -__msg("fp-8=0m??mmmm") -__msg("fp-16=00mm??mm") -__msg("fp-24=00mm???m") +__msg("fp-8=0m??scalar()") +__msg("fp-16=00mm??scalar()") +__msg("fp-24=00mm???scalar()") __naked void spill_subregs_preserve_stack_zero(void) { asm volatile ( @@ -940,4 +952,296 @@ l0_%=: r0 = 0; \ : __clobber_all); } +SEC("xdp") +__description("spill unbounded reg, then range check src") +__success __retval(0) +__naked void spill_unbounded(void) +{ + asm volatile (" \ + /* Produce an unbounded scalar. */ \ + call %[bpf_get_prandom_u32]; \ + /* Spill r0 to stack. */ \ + *(u64*)(r10 - 8) = r0; \ + /* Boundary check on r0. */ \ + if r0 > 16 goto l0_%=; \ + /* Fill r0 from stack. */ \ + r0 = *(u64*)(r10 - 8); \ + /* Boundary check on r0 with predetermined result. */\ + if r0 <= 16 goto l0_%=; \ + /* Dead branch: the verifier should prune it. Do an invalid memory\ + * access if the verifier follows it. \ + */ \ + r0 = *(u64*)(r9 + 0); \ +l0_%=: r0 = 0; \ + exit; \ +" : + : __imm(bpf_get_prandom_u32) + : __clobber_all); +} + +SEC("xdp") +__description("32-bit fill after 64-bit spill") +__success __retval(0) +__naked void fill_32bit_after_spill_64bit(void) +{ + asm volatile(" \ + /* Randomize the upper 32 bits. */ \ + call %[bpf_get_prandom_u32]; \ + r0 <<= 32; \ + /* 64-bit spill r0 to stack. */ \ + *(u64*)(r10 - 8) = r0; \ + /* 32-bit fill r0 from stack. */ \ + " +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r0 = *(u32*)(r10 - 8);" +#else + "r0 = *(u32*)(r10 - 4);" +#endif + " \ + /* Boundary check on r0 with predetermined result. */\ + if r0 == 0 goto l0_%=; \ + /* Dead branch: the verifier should prune it. Do an invalid memory\ + * access if the verifier follows it. \ + */ \ + r0 = *(u64*)(r9 + 0); \ +l0_%=: exit; \ +" : + : __imm(bpf_get_prandom_u32) + : __clobber_all); +} + +SEC("xdp") +__description("32-bit fill after 64-bit spill of 32-bit value should preserve ID") +__success __retval(0) +__naked void fill_32bit_after_spill_64bit_preserve_id(void) +{ + asm volatile (" \ + /* Randomize the lower 32 bits. */ \ + call %[bpf_get_prandom_u32]; \ + w0 &= 0xffffffff; \ + /* 64-bit spill r0 to stack - should assign an ID. */\ + *(u64*)(r10 - 8) = r0; \ + /* 32-bit fill r1 from stack - should preserve the ID. */\ + " +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r1 = *(u32*)(r10 - 8);" +#else + "r1 = *(u32*)(r10 - 4);" +#endif + " \ + /* Compare r1 with another register to trigger find_equal_scalars. */\ + r2 = 0; \ + if r1 != r2 goto l0_%=; \ + /* The result of this comparison is predefined. */\ + if r0 == r2 goto l0_%=; \ + /* Dead branch: the verifier should prune it. Do an invalid memory\ + * access if the verifier follows it. \ + */ \ + r0 = *(u64*)(r9 + 0); \ + exit; \ +l0_%=: r0 = 0; \ + exit; \ +" : + : __imm(bpf_get_prandom_u32) + : __clobber_all); +} + +SEC("xdp") +__description("32-bit fill after 64-bit spill should clear ID") +__failure __msg("math between ctx pointer and 4294967295 is not allowed") +__naked void fill_32bit_after_spill_64bit_clear_id(void) +{ + asm volatile (" \ + r6 = r1; \ + /* Roll one bit to force the verifier to track both branches. */\ + call %[bpf_get_prandom_u32]; \ + r0 &= 0x8; \ + /* Put a large number into r1. */ \ + r1 = 0xffffffff; \ + r1 <<= 32; \ + r1 += r0; \ + /* 64-bit spill r1 to stack - should assign an ID. */\ + *(u64*)(r10 - 8) = r1; \ + /* 32-bit fill r2 from stack - should clear the ID. */\ + " +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r2 = *(u32*)(r10 - 8);" +#else + "r2 = *(u32*)(r10 - 4);" +#endif + " \ + /* Compare r2 with another register to trigger find_equal_scalars.\ + * Having one random bit is important here, otherwise the verifier cuts\ + * the corners. If the ID was mistakenly preserved on fill, this would\ + * cause the verifier to think that r1 is also equal to zero in one of\ + * the branches, and equal to eight on the other branch.\ + */ \ + r3 = 0; \ + if r2 != r3 goto l0_%=; \ +l0_%=: r1 >>= 32; \ + /* The verifier shouldn't propagate r2's range to r1, so it should\ + * still remember r1 = 0xffffffff and reject the below.\ + */ \ + r6 += r1; \ + r0 = *(u32*)(r6 + 0); \ + exit; \ +" : + : __imm(bpf_get_prandom_u32) + : __clobber_all); +} + +/* stacksafe(): check if stack spill of an imprecise scalar in old state + * is considered equivalent to STACK_{MISC,INVALID} in cur state. + */ +SEC("socket") +__success __log_level(2) +__msg("8: (79) r1 = *(u64 *)(r10 -8)") +__msg("8: safe") +__msg("processed 11 insns") +/* STACK_INVALID should prevent verifier in unpriv mode from + * considering states equivalent and force an error on second + * verification path (entry - label 1 - label 2). + */ +__failure_unpriv +__msg_unpriv("8: (79) r1 = *(u64 *)(r10 -8)") +__msg_unpriv("9: (95) exit") +__msg_unpriv("8: (79) r1 = *(u64 *)(r10 -8)") +__msg_unpriv("invalid read from stack off -8+2 size 8") +__flag(BPF_F_TEST_STATE_FREQ) +__naked void old_imprecise_scalar_vs_cur_stack_misc(void) +{ + asm volatile( + /* get a random value for branching */ + "call %[bpf_ktime_get_ns];" + "if r0 == 0 goto 1f;" + /* conjure scalar at fp-8 */ + "r0 = 42;" + "*(u64*)(r10 - 8) = r0;" + "goto 2f;" +"1:" + /* conjure STACK_{MISC,INVALID} at fp-8 */ + "call %[bpf_ktime_get_ns];" + "*(u16*)(r10 - 8) = r0;" + "*(u16*)(r10 - 4) = r0;" +"2:" + /* read fp-8, should be considered safe on second visit */ + "r1 = *(u64*)(r10 - 8);" + "exit;" + : + : __imm(bpf_ktime_get_ns) + : __clobber_all); +} + +/* stacksafe(): check that stack spill of a precise scalar in old state + * is not considered equivalent to STACK_MISC in cur state. + */ +SEC("socket") +__success __log_level(2) +/* verifier should visit 'if r1 == 0x2a ...' two times: + * - once for path entry - label 2; + * - once for path entry - label 1 - label 2. + */ +__msg("if r1 == 0x2a goto pc+0") +__msg("if r1 == 0x2a goto pc+0") +__msg("processed 15 insns") +__flag(BPF_F_TEST_STATE_FREQ) +__naked void old_precise_scalar_vs_cur_stack_misc(void) +{ + asm volatile( + /* get a random value for branching */ + "call %[bpf_ktime_get_ns];" + "if r0 == 0 goto 1f;" + /* conjure scalar at fp-8 */ + "r0 = 42;" + "*(u64*)(r10 - 8) = r0;" + "goto 2f;" +"1:" + /* conjure STACK_MISC at fp-8 */ + "call %[bpf_ktime_get_ns];" + "*(u64*)(r10 - 8) = r0;" + "*(u32*)(r10 - 4) = r0;" +"2:" + /* read fp-8, should not be considered safe on second visit */ + "r1 = *(u64*)(r10 - 8);" + /* use r1 in precise context */ + "if r1 == 42 goto +0;" + "exit;" + : + : __imm(bpf_ktime_get_ns) + : __clobber_all); +} + +/* stacksafe(): check if STACK_MISC in old state is considered + * equivalent to stack spill of a scalar in cur state. + */ +SEC("socket") +__success __log_level(2) +__msg("8: (79) r0 = *(u64 *)(r10 -8)") +__msg("8: safe") +__msg("processed 11 insns") +__flag(BPF_F_TEST_STATE_FREQ) +__naked void old_stack_misc_vs_cur_scalar(void) +{ + asm volatile( + /* get a random value for branching */ + "call %[bpf_ktime_get_ns];" + "if r0 == 0 goto 1f;" + /* conjure STACK_{MISC,INVALID} at fp-8 */ + "call %[bpf_ktime_get_ns];" + "*(u16*)(r10 - 8) = r0;" + "*(u16*)(r10 - 4) = r0;" + "goto 2f;" +"1:" + /* conjure scalar at fp-8 */ + "r0 = 42;" + "*(u64*)(r10 - 8) = r0;" +"2:" + /* read fp-8, should be considered safe on second visit */ + "r0 = *(u64*)(r10 - 8);" + "exit;" + : + : __imm(bpf_ktime_get_ns) + : __clobber_all); +} + +/* stacksafe(): check that STACK_MISC in old state is not considered + * equivalent to stack spill of a non-scalar in cur state. + */ +SEC("socket") +__success __log_level(2) +/* verifier should process exit instructions twice: + * - once for path entry - label 2; + * - once for path entry - label 1 - label 2. + */ +__msg("r1 = *(u64 *)(r10 -8)") +__msg("exit") +__msg("r1 = *(u64 *)(r10 -8)") +__msg("exit") +__msg("processed 11 insns") +__flag(BPF_F_TEST_STATE_FREQ) +__naked void old_stack_misc_vs_cur_ctx_ptr(void) +{ + asm volatile( + /* remember context pointer in r9 */ + "r9 = r1;" + /* get a random value for branching */ + "call %[bpf_ktime_get_ns];" + "if r0 == 0 goto 1f;" + /* conjure STACK_MISC at fp-8 */ + "call %[bpf_ktime_get_ns];" + "*(u64*)(r10 - 8) = r0;" + "*(u32*)(r10 - 4) = r0;" + "goto 2f;" +"1:" + /* conjure context pointer in fp-8 */ + "*(u64*)(r10 - 8) = r9;" +"2:" + /* read fp-8, should not be considered safe on second visit */ + "r1 = *(u64*)(r10 - 8);" + "exit;" + : + : __imm(bpf_ktime_get_ns) + : __clobber_all); +} + char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/verifier_spin_lock.c b/tools/testing/selftests/bpf/progs/verifier_spin_lock.c index 9c1aa69650f8..fb316c080c84 100644 --- a/tools/testing/selftests/bpf/progs/verifier_spin_lock.c +++ b/tools/testing/selftests/bpf/progs/verifier_spin_lock.c @@ -330,7 +330,7 @@ l1_%=: r7 = r0; \ SEC("cgroup/skb") __description("spin_lock: test10 lock in subprog without unlock") -__failure __msg("unlock is missing") +__success __failure_unpriv __msg_unpriv("") __naked void lock_in_subprog_without_unlock(void) { diff --git a/tools/testing/selftests/bpf/progs/xdp_synproxy_kern.c b/tools/testing/selftests/bpf/progs/xdp_synproxy_kern.c index 518329c666e9..7ea9785738b5 100644 --- a/tools/testing/selftests/bpf/progs/xdp_synproxy_kern.c +++ b/tools/testing/selftests/bpf/progs/xdp_synproxy_kern.c @@ -7,6 +7,8 @@ #include <bpf/bpf_endian.h> #include <asm/errno.h> +#include "bpf_compiler.h" + #define TC_ACT_OK 0 #define TC_ACT_SHOT 2 @@ -151,11 +153,11 @@ static __always_inline __u16 csum_ipv6_magic(const struct in6_addr *saddr, __u64 sum = csum; int i; -#pragma unroll + __pragma_loop_unroll for (i = 0; i < 4; i++) sum += (__u32)saddr->in6_u.u6_addr32[i]; -#pragma unroll + __pragma_loop_unroll for (i = 0; i < 4; i++) sum += (__u32)daddr->in6_u.u6_addr32[i]; diff --git a/tools/testing/selftests/bpf/progs/xdping_kern.c b/tools/testing/selftests/bpf/progs/xdping_kern.c index 54cf1765118b..44e2b0ef23ae 100644 --- a/tools/testing/selftests/bpf/progs/xdping_kern.c +++ b/tools/testing/selftests/bpf/progs/xdping_kern.c @@ -15,6 +15,7 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> +#include "bpf_compiler.h" #include "xdping.h" struct { @@ -116,7 +117,7 @@ int xdping_client(struct xdp_md *ctx) return XDP_PASS; if (pinginfo->start) { -#pragma clang loop unroll(full) + __pragma_loop_unroll_full for (i = 0; i < XDPING_MAX_COUNT; i++) { if (pinginfo->times[i] == 0) break; |