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authorLinus Torvalds <torvalds@linux-foundation.org>2018-02-06 22:15:42 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-06 22:15:42 -0800
commita2e5790d841658485d642196dbb0927303d6c22f (patch)
treeb3d28c9bcb7da6880806146fd22a88a7ee7f733e /kernel
parentab2d92ad881da11331280aedf612d82e61cb6d41 (diff)
parent60c3e026d73ccabb075fb70ba02f8512ab40cf2c (diff)
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Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton: - kasan updates - procfs - lib/bitmap updates - other lib/ updates - checkpatch tweaks - rapidio - ubsan - pipe fixes and cleanups - lots of other misc bits * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (114 commits) Documentation/sysctl/user.txt: fix typo MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns MAINTAINERS: update various PALM patterns MAINTAINERS: update "ARM/OXNAS platform support" patterns MAINTAINERS: update Cortina/Gemini patterns MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern MAINTAINERS: remove ANDROID ION pattern mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors mm: docs: fix parameter names mismatch mm: docs: fixup punctuation pipe: read buffer limits atomically pipe: simplify round_pipe_size() pipe: reject F_SETPIPE_SZ with size over UINT_MAX pipe: fix off-by-one error when checking buffer limits pipe: actually allow root to exceed the pipe buffer limits pipe, sysctl: remove pipe_proc_fn() pipe, sysctl: drop 'min' parameter from pipe-max-size converter kasan: rework Kconfig settings crash_dump: is_kdump_kernel can be boolean kernel/mutex: mutex_is_locked can be boolean ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/async.c20
-rw-r--r--kernel/cgroup/cpuset.c4
-rw-r--r--kernel/compat.c2
-rw-r--r--kernel/configs/tiny.config4
-rw-r--r--kernel/fork.c55
-rw-r--r--kernel/futex.c20
-rw-r--r--kernel/irq/spurious.c1
-rw-r--r--kernel/kcov.c4
-rw-r--r--kernel/pid.c13
-rw-r--r--kernel/ptrace.c27
-rw-r--r--kernel/relay.c1
-rw-r--r--kernel/resource.c10
-rw-r--r--kernel/sched/core.c2
-rw-r--r--kernel/sysctl.c33
-rw-r--r--kernel/taskstats.c6
-rw-r--r--kernel/time/hrtimer.c1
16 files changed, 83 insertions, 120 deletions
diff --git a/kernel/async.c b/kernel/async.c
index 2cbd3dd5940d..a893d6170944 100644
--- a/kernel/async.c
+++ b/kernel/async.c
@@ -84,20 +84,24 @@ static atomic_t entry_count;
static async_cookie_t lowest_in_progress(struct async_domain *domain)
{
- struct list_head *pending;
+ struct async_entry *first = NULL;
async_cookie_t ret = ASYNC_COOKIE_MAX;
unsigned long flags;
spin_lock_irqsave(&async_lock, flags);
- if (domain)
- pending = &domain->pending;
- else
- pending = &async_global_pending;
+ if (domain) {
+ if (!list_empty(&domain->pending))
+ first = list_first_entry(&domain->pending,
+ struct async_entry, domain_list);
+ } else {
+ if (!list_empty(&async_global_pending))
+ first = list_first_entry(&async_global_pending,
+ struct async_entry, global_list);
+ }
- if (!list_empty(pending))
- ret = list_first_entry(pending, struct async_entry,
- domain_list)->cookie;
+ if (first)
+ ret = first->cookie;
spin_unlock_irqrestore(&async_lock, flags);
return ret;
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index f7efa7b4d825..b42037e6e81d 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1254,9 +1254,9 @@ done:
return retval;
}
-int current_cpuset_is_being_rebound(void)
+bool current_cpuset_is_being_rebound(void)
{
- int ret;
+ bool ret;
rcu_read_lock();
ret = task_cs(current) == cpuset_being_rebound;
diff --git a/kernel/compat.c b/kernel/compat.c
index d1cee656a7ed..3247fe761f60 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -355,7 +355,7 @@ COMPAT_SYSCALL_DEFINE3(sched_getaffinity, compat_pid_t, pid, unsigned int, len,
ret = sched_getaffinity(pid, mask);
if (ret == 0) {
- size_t retlen = min_t(size_t, len, cpumask_size());
+ unsigned int retlen = min(len, cpumask_size());
if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8))
ret = -EFAULT;
diff --git a/kernel/configs/tiny.config b/kernel/configs/tiny.config
index 7fa0c4ae6394..9bfdffc100da 100644
--- a/kernel/configs/tiny.config
+++ b/kernel/configs/tiny.config
@@ -10,3 +10,7 @@ CONFIG_OPTIMIZE_INLINING=y
# CONFIG_SLAB is not set
# CONFIG_SLUB is not set
CONFIG_SLOB=y
+CONFIG_CC_STACKPROTECTOR_NONE=y
+# CONFIG_CC_STACKPROTECTOR_REGULAR is not set
+# CONFIG_CC_STACKPROTECTOR_STRONG is not set
+# CONFIG_CC_STACKPROTECTOR_AUTO is not set
diff --git a/kernel/fork.c b/kernel/fork.c
index c7c112391d79..be8aa5b98666 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1592,6 +1592,10 @@ static __latent_entropy struct task_struct *copy_process(
int retval;
struct task_struct *p;
+ /*
+ * Don't allow sharing the root directory with processes in a different
+ * namespace
+ */
if ((clone_flags & (CLONE_NEWNS|CLONE_FS)) == (CLONE_NEWNS|CLONE_FS))
return ERR_PTR(-EINVAL);
@@ -2067,6 +2071,8 @@ long _do_fork(unsigned long clone_flags,
int __user *child_tidptr,
unsigned long tls)
{
+ struct completion vfork;
+ struct pid *pid;
struct task_struct *p;
int trace = 0;
long nr;
@@ -2092,43 +2098,40 @@ long _do_fork(unsigned long clone_flags,
p = copy_process(clone_flags, stack_start, stack_size,
child_tidptr, NULL, trace, tls, NUMA_NO_NODE);
add_latent_entropy();
+
+ if (IS_ERR(p))
+ return PTR_ERR(p);
+
/*
* Do this prior waking up the new thread - the thread pointer
* might get invalid after that point, if the thread exits quickly.
*/
- if (!IS_ERR(p)) {
- struct completion vfork;
- struct pid *pid;
-
- trace_sched_process_fork(current, p);
+ trace_sched_process_fork(current, p);
- pid = get_task_pid(p, PIDTYPE_PID);
- nr = pid_vnr(pid);
+ pid = get_task_pid(p, PIDTYPE_PID);
+ nr = pid_vnr(pid);
- if (clone_flags & CLONE_PARENT_SETTID)
- put_user(nr, parent_tidptr);
+ if (clone_flags & CLONE_PARENT_SETTID)
+ put_user(nr, parent_tidptr);
- if (clone_flags & CLONE_VFORK) {
- p->vfork_done = &vfork;
- init_completion(&vfork);
- get_task_struct(p);
- }
-
- wake_up_new_task(p);
+ if (clone_flags & CLONE_VFORK) {
+ p->vfork_done = &vfork;
+ init_completion(&vfork);
+ get_task_struct(p);
+ }
- /* forking complete and child started to run, tell ptracer */
- if (unlikely(trace))
- ptrace_event_pid(trace, pid);
+ wake_up_new_task(p);
- if (clone_flags & CLONE_VFORK) {
- if (!wait_for_vfork_done(p, &vfork))
- ptrace_event_pid(PTRACE_EVENT_VFORK_DONE, pid);
- }
+ /* forking complete and child started to run, tell ptracer */
+ if (unlikely(trace))
+ ptrace_event_pid(trace, pid);
- put_pid(pid);
- } else {
- nr = PTR_ERR(p);
+ if (clone_flags & CLONE_VFORK) {
+ if (!wait_for_vfork_done(p, &vfork))
+ ptrace_event_pid(PTRACE_EVENT_VFORK_DONE, pid);
}
+
+ put_pid(pid);
return nr;
}
diff --git a/kernel/futex.c b/kernel/futex.c
index 7f719d110908..1f450e092c74 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -862,24 +862,6 @@ static void put_pi_state(struct futex_pi_state *pi_state)
}
}
-/*
- * Look up the task based on what TID userspace gave us.
- * We dont trust it.
- */
-static struct task_struct *futex_find_get_task(pid_t pid)
-{
- struct task_struct *p;
-
- rcu_read_lock();
- p = find_task_by_vpid(pid);
- if (p)
- get_task_struct(p);
-
- rcu_read_unlock();
-
- return p;
-}
-
#ifdef CONFIG_FUTEX_PI
/*
@@ -1183,7 +1165,7 @@ static int attach_to_pi_owner(u32 uval, union futex_key *key,
*/
if (!pid)
return -ESRCH;
- p = futex_find_get_task(pid);
+ p = find_get_task_by_vpid(pid);
if (!p)
return -ESRCH;
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index ef2a47e0eab6..6cdecc6f4c53 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -10,7 +10,6 @@
#include <linux/jiffies.h>
#include <linux/irq.h>
#include <linux/module.h>
-#include <linux/kallsyms.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
diff --git a/kernel/kcov.c b/kernel/kcov.c
index 7594c033d98a..2c16f1ab5e10 100644
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -358,7 +358,8 @@ static int kcov_ioctl_locked(struct kcov *kcov, unsigned int cmd,
*/
if (kcov->mode != KCOV_MODE_INIT || !kcov->area)
return -EINVAL;
- if (kcov->t != NULL)
+ t = current;
+ if (kcov->t != NULL || t->kcov != NULL)
return -EBUSY;
if (arg == KCOV_TRACE_PC)
kcov->mode = KCOV_MODE_TRACE_PC;
@@ -370,7 +371,6 @@ static int kcov_ioctl_locked(struct kcov *kcov, unsigned int cmd,
#endif
else
return -EINVAL;
- t = current;
/* Cache in task struct for performance. */
t->kcov_size = kcov->size;
t->kcov_area = kcov->area;
diff --git a/kernel/pid.c b/kernel/pid.c
index 5d30c87e3c42..ed6c343fe50d 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -343,6 +343,19 @@ struct task_struct *find_task_by_vpid(pid_t vnr)
return find_task_by_pid_ns(vnr, task_active_pid_ns(current));
}
+struct task_struct *find_get_task_by_vpid(pid_t nr)
+{
+ struct task_struct *task;
+
+ rcu_read_lock();
+ task = find_task_by_vpid(nr);
+ if (task)
+ get_task_struct(task);
+ rcu_read_unlock();
+
+ return task;
+}
+
struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
{
struct pid *pid;
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 5e1d713c8e61..21fec73d45d4 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -1103,21 +1103,6 @@ int ptrace_request(struct task_struct *child, long request,
return ret;
}
-static struct task_struct *ptrace_get_task_struct(pid_t pid)
-{
- struct task_struct *child;
-
- rcu_read_lock();
- child = find_task_by_vpid(pid);
- if (child)
- get_task_struct(child);
- rcu_read_unlock();
-
- if (!child)
- return ERR_PTR(-ESRCH);
- return child;
-}
-
#ifndef arch_ptrace_attach
#define arch_ptrace_attach(child) do { } while (0)
#endif
@@ -1135,9 +1120,9 @@ SYSCALL_DEFINE4(ptrace, long, request, long, pid, unsigned long, addr,
goto out;
}
- child = ptrace_get_task_struct(pid);
- if (IS_ERR(child)) {
- ret = PTR_ERR(child);
+ child = find_get_task_by_vpid(pid);
+ if (!child) {
+ ret = -ESRCH;
goto out;
}
@@ -1281,9 +1266,9 @@ COMPAT_SYSCALL_DEFINE4(ptrace, compat_long_t, request, compat_long_t, pid,
goto out;
}
- child = ptrace_get_task_struct(pid);
- if (IS_ERR(child)) {
- ret = PTR_ERR(child);
+ child = find_get_task_by_vpid(pid);
+ if (!child) {
+ ret = -ESRCH;
goto out;
}
diff --git a/kernel/relay.c b/kernel/relay.c
index 41280033a4c5..f7f40a6e6352 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -611,7 +611,6 @@ free_bufs:
kref_put(&chan->kref, relay_destroy_channel);
mutex_unlock(&relay_channels_mutex);
- kfree(chan);
return NULL;
}
EXPORT_SYMBOL_GPL(relay_open);
diff --git a/kernel/resource.c b/kernel/resource.c
index 8c527d83ca76..e270b5048988 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -1576,17 +1576,17 @@ static int strict_iomem_checks;
/*
* check if an address is reserved in the iomem resource tree
- * returns 1 if reserved, 0 if not reserved.
+ * returns true if reserved, false if not reserved.
*/
-int iomem_is_exclusive(u64 addr)
+bool iomem_is_exclusive(u64 addr)
{
struct resource *p = &iomem_resource;
- int err = 0;
+ bool err = false;
loff_t l;
int size = PAGE_SIZE;
if (!strict_iomem_checks)
- return 0;
+ return false;
addr = addr & PAGE_MASK;
@@ -1609,7 +1609,7 @@ int iomem_is_exclusive(u64 addr)
continue;
if (IS_ENABLED(CONFIG_IO_STRICT_DEVMEM)
|| p->flags & IORESOURCE_EXCLUSIVE) {
- err = 1;
+ err = true;
break;
}
}
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 36f113ac6353..bf724c1952ea 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4867,7 +4867,7 @@ SYSCALL_DEFINE3(sched_getaffinity, pid_t, pid, unsigned int, len,
ret = sched_getaffinity(pid, mask);
if (ret == 0) {
- size_t retlen = min_t(size_t, len, cpumask_size());
+ unsigned int retlen = min(len, cpumask_size());
if (copy_to_user(user_mask_ptr, mask, retlen))
ret = -EFAULT;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 2fb4e27c636a..f98f28c12020 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -218,6 +218,8 @@ static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
static int proc_dostring_coredump(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos);
#endif
+static int proc_dopipe_max_size(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos);
#ifdef CONFIG_MAGIC_SYSRQ
/* Note: sysrq code uses it's own private copy */
@@ -1812,8 +1814,7 @@ static struct ctl_table fs_table[] = {
.data = &pipe_max_size,
.maxlen = sizeof(pipe_max_size),
.mode = 0644,
- .proc_handler = &pipe_proc_fn,
- .extra1 = &pipe_min_size,
+ .proc_handler = proc_dopipe_max_size,
},
{
.procname = "pipe-user-pages-hard",
@@ -2615,29 +2616,17 @@ int proc_douintvec_minmax(struct ctl_table *table, int write,
do_proc_douintvec_minmax_conv, &param);
}
-struct do_proc_dopipe_max_size_conv_param {
- unsigned int *min;
-};
-
static int do_proc_dopipe_max_size_conv(unsigned long *lvalp,
unsigned int *valp,
int write, void *data)
{
- struct do_proc_dopipe_max_size_conv_param *param = data;
-
if (write) {
unsigned int val;
- if (*lvalp > UINT_MAX)
- return -EINVAL;
-
val = round_pipe_size(*lvalp);
if (val == 0)
return -EINVAL;
- if (param->min && *param->min > val)
- return -ERANGE;
-
*valp = val;
} else {
unsigned int val = *valp;
@@ -2647,14 +2636,11 @@ static int do_proc_dopipe_max_size_conv(unsigned long *lvalp,
return 0;
}
-int proc_dopipe_max_size(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+static int proc_dopipe_max_size(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
{
- struct do_proc_dopipe_max_size_conv_param param = {
- .min = (unsigned int *) table->extra1,
- };
return do_proc_douintvec(table, write, buffer, lenp, ppos,
- do_proc_dopipe_max_size_conv, &param);
+ do_proc_dopipe_max_size_conv, NULL);
}
static void validate_coredump_safety(void)
@@ -3160,12 +3146,6 @@ int proc_douintvec_minmax(struct ctl_table *table, int write,
return -ENOSYS;
}
-int proc_dopipe_max_size(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
-
int proc_dointvec_jiffies(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
@@ -3209,7 +3189,6 @@ EXPORT_SYMBOL(proc_douintvec);
EXPORT_SYMBOL(proc_dointvec_jiffies);
EXPORT_SYMBOL(proc_dointvec_minmax);
EXPORT_SYMBOL_GPL(proc_douintvec_minmax);
-EXPORT_SYMBOL_GPL(proc_dopipe_max_size);
EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
EXPORT_SYMBOL(proc_dostring);
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 4559e914452b..4e62a4a8fa91 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -194,11 +194,7 @@ static int fill_stats_for_pid(pid_t pid, struct taskstats *stats)
{
struct task_struct *tsk;
- rcu_read_lock();
- tsk = find_task_by_vpid(pid);
- if (tsk)
- get_task_struct(tsk);
- rcu_read_unlock();
+ tsk = find_get_task_by_vpid(pid);
if (!tsk)
return -ESRCH;
fill_stats(current_user_ns(), task_active_pid_ns(current), tsk, stats);
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index ae0c8a411fe7..23788100e214 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -37,7 +37,6 @@
#include <linux/hrtimer.h>
#include <linux/notifier.h>
#include <linux/syscalls.h>
-#include <linux/kallsyms.h>
#include <linux/interrupt.h>
#include <linux/tick.h>
#include <linux/seq_file.h>