diff options
author | Martin KaFai Lau <kafai@fb.com> | 2020-01-27 09:51:45 -0800 |
---|---|---|
committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-01-29 16:40:54 +0100 |
commit | d3e42bb0a329fadff98fcb927714d0a486840e3b (patch) | |
tree | 4d98a7235279da2956f340bcdb08d78cb6bdb76f | |
parent | 44efc78d0e464ce70b45b165c005f8bedc17952e (diff) | |
download | linux-d3e42bb0a329fadff98fcb927714d0a486840e3b.tar.gz linux-d3e42bb0a329fadff98fcb927714d0a486840e3b.tar.bz2 linux-d3e42bb0a329fadff98fcb927714d0a486840e3b.zip |
bpf: Reuse log from btf_prase_vmlinux() in btf_struct_ops_init()
Instead of using a locally defined "struct bpf_verifier_log log = {}",
btf_struct_ops_init() should reuse the "log" from its calling
function "btf_parse_vmlinux()". It should also resolve the
frame-size too large compiler warning in some ARCH.
Fixes: 27ae7997a661 ("bpf: Introduce BPF_PROG_TYPE_STRUCT_OPS")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200127175145.1154438-1-kafai@fb.com
-rw-r--r-- | include/linux/bpf.h | 7 | ||||
-rw-r--r-- | kernel/bpf/bpf_struct_ops.c | 5 | ||||
-rw-r--r-- | kernel/bpf/btf.c | 2 |
3 files changed, 8 insertions, 6 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 8e9ad3943cd9..49b1a70e12c8 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -728,7 +728,7 @@ struct bpf_struct_ops { #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL) #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA)) const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id); -void bpf_struct_ops_init(struct btf *btf); +void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log); bool bpf_struct_ops_get(const void *kdata); void bpf_struct_ops_put(const void *kdata); int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, @@ -752,7 +752,10 @@ static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id) { return NULL; } -static inline void bpf_struct_ops_init(struct btf *btf) { } +static inline void bpf_struct_ops_init(struct btf *btf, + struct bpf_verifier_log *log) +{ +} static inline bool bpf_try_module_get(const void *data, struct module *owner) { return try_module_get(owner); diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c index 8ad1c9ea26b2..042f95534f86 100644 --- a/kernel/bpf/bpf_struct_ops.c +++ b/kernel/bpf/bpf_struct_ops.c @@ -96,12 +96,11 @@ const struct bpf_prog_ops bpf_struct_ops_prog_ops = { static const struct btf_type *module_type; -void bpf_struct_ops_init(struct btf *btf) +void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log) { s32 type_id, value_id, module_id; const struct btf_member *member; struct bpf_struct_ops *st_ops; - struct bpf_verifier_log log = {}; const struct btf_type *t; char value_name[128]; const char *mname; @@ -172,7 +171,7 @@ void bpf_struct_ops_init(struct btf *btf) member->type, NULL); if (func_proto && - btf_distill_func_proto(&log, btf, + btf_distill_func_proto(log, btf, func_proto, mname, &st_ops->func_models[j])) { pr_warn("Error in parsing func ptr %s in struct %s\n", diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index b7c1660fb594..8c9d8f266bef 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -3643,7 +3643,7 @@ struct btf *btf_parse_vmlinux(void) goto errout; } - bpf_struct_ops_init(btf); + bpf_struct_ops_init(btf, log); btf_verifier_env_free(env); refcount_set(&btf->refcnt, 1); |