summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/ia64/include/asm/ptrace.h4
-rw-r--r--arch/sparc/include/asm/ptrace.h8
-rw-r--r--fs/binfmt_elf.c4
-rw-r--r--fs/binfmt_elf_fdpic.c2
-rw-r--r--fs/coredump.c88
-rw-r--r--fs/exec.c14
-rw-r--r--fs/proc/array.c6
-rw-r--r--include/linux/mm_types.h13
-rw-r--r--include/linux/ptrace.h22
-rw-r--r--include/linux/sched.h1
-rw-r--r--include/linux/sched/signal.h13
-rw-r--r--kernel/exit.c76
-rw-r--r--kernel/fork.c4
-rw-r--r--kernel/signal.c49
-rw-r--r--mm/debug.c4
-rw-r--r--mm/oom_kill.c6
16 files changed, 106 insertions, 208 deletions
diff --git a/arch/ia64/include/asm/ptrace.h b/arch/ia64/include/asm/ptrace.h
index 8a2d0f72b324..a10a498eede1 100644
--- a/arch/ia64/include/asm/ptrace.h
+++ b/arch/ia64/include/asm/ptrace.h
@@ -134,9 +134,9 @@ static inline long regs_return_value(struct pt_regs *regs)
extern void ia64_decrement_ip (struct pt_regs *pt);
extern void ia64_ptrace_stop(void);
- #define arch_ptrace_stop(code, info) \
+ #define arch_ptrace_stop() \
ia64_ptrace_stop()
- #define arch_ptrace_stop_needed(code, info) \
+ #define arch_ptrace_stop_needed() \
(!test_thread_flag(TIF_RESTORE_RSE))
extern void ptrace_attach_sync_user_rbs (struct task_struct *);
diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h
index 71dd82b43cc5..d1419e669027 100644
--- a/arch/sparc/include/asm/ptrace.h
+++ b/arch/sparc/include/asm/ptrace.h
@@ -26,12 +26,12 @@ static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
return (regs->tstate &= ~TSTATE_SYSCALL);
}
-#define arch_ptrace_stop_needed(exit_code, info) \
+#define arch_ptrace_stop_needed() \
({ flush_user_windows(); \
get_thread_wsaved() != 0; \
})
-#define arch_ptrace_stop(exit_code, info) \
+#define arch_ptrace_stop() \
synchronize_user_stack()
#define current_pt_regs() \
@@ -129,12 +129,12 @@ static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
return (regs->psr &= ~PSR_SYSCALL);
}
-#define arch_ptrace_stop_needed(exit_code, info) \
+#define arch_ptrace_stop_needed() \
({ flush_user_windows(); \
current_thread_info()->w_saved != 0; \
})
-#define arch_ptrace_stop(exit_code, info) \
+#define arch_ptrace_stop() \
synchronize_user_stack()
#define current_pt_regs() \
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index a813b70f594e..fa582748be41 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1834,7 +1834,7 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
/*
* Allocate a structure for each thread.
*/
- for (ct = &dump_task->mm->core_state->dumper; ct; ct = ct->next) {
+ for (ct = &dump_task->signal->core_state->dumper; ct; ct = ct->next) {
t = kzalloc(offsetof(struct elf_thread_core_info,
notes[info->thread_notes]),
GFP_KERNEL);
@@ -2024,7 +2024,7 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
if (!elf_note_info_init(info))
return 0;
- for (ct = current->mm->core_state->dumper.next;
+ for (ct = current->signal->core_state->dumper.next;
ct; ct = ct->next) {
ets = kzalloc(sizeof(*ets), GFP_KERNEL);
if (!ets)
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 6d8fd6030cbb..c6f588dc4a9d 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -1494,7 +1494,7 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm)
if (dump_vma_snapshot(cprm, &vma_count, &vma_meta, &vma_data_size))
goto end_coredump;
- for (ct = current->mm->core_state->dumper.next;
+ for (ct = current->signal->core_state->dumper.next;
ct; ct = ct->next) {
tmp = elf_dump_thread_status(cprm->siginfo->si_signo,
ct->task, &thread_status_size);
diff --git a/fs/coredump.c b/fs/coredump.c
index 3224dee44d30..a6b3c196cdef 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -359,7 +359,7 @@ static int zap_process(struct task_struct *start, int exit_code, int flags)
for_each_thread(start, t) {
task_clear_jobctl_pending(t, JOBCTL_PENDING_MASK);
- if (t != current && t->mm) {
+ if (t != current && !(t->flags & PF_POSTCOREDUMP)) {
sigaddset(&t->pending.signal, SIGKILL);
signal_wake_up(t, 1);
nr++;
@@ -369,99 +369,34 @@ static int zap_process(struct task_struct *start, int exit_code, int flags)
return nr;
}
-static int zap_threads(struct task_struct *tsk, struct mm_struct *mm,
+static int zap_threads(struct task_struct *tsk,
struct core_state *core_state, int exit_code)
{
- struct task_struct *g, *p;
- unsigned long flags;
int nr = -EAGAIN;
spin_lock_irq(&tsk->sighand->siglock);
if (!signal_group_exit(tsk->signal)) {
- mm->core_state = core_state;
+ tsk->signal->core_state = core_state;
tsk->signal->group_exit_task = tsk;
nr = zap_process(tsk, exit_code, 0);
clear_tsk_thread_flag(tsk, TIF_SIGPENDING);
+ tsk->flags |= PF_DUMPCORE;
+ atomic_set(&core_state->nr_threads, nr);
}
spin_unlock_irq(&tsk->sighand->siglock);
- if (unlikely(nr < 0))
- return nr;
-
- tsk->flags |= PF_DUMPCORE;
- if (atomic_read(&mm->mm_users) == nr + 1)
- goto done;
- /*
- * We should find and kill all tasks which use this mm, and we should
- * count them correctly into ->nr_threads. We don't take tasklist
- * lock, but this is safe wrt:
- *
- * fork:
- * None of sub-threads can fork after zap_process(leader). All
- * processes which were created before this point should be
- * visible to zap_threads() because copy_process() adds the new
- * process to the tail of init_task.tasks list, and lock/unlock
- * of ->siglock provides a memory barrier.
- *
- * do_exit:
- * The caller holds mm->mmap_lock. This means that the task which
- * uses this mm can't pass exit_mm(), so it can't exit or clear
- * its ->mm.
- *
- * de_thread:
- * It does list_replace_rcu(&leader->tasks, &current->tasks),
- * we must see either old or new leader, this does not matter.
- * However, it can change p->sighand, so lock_task_sighand(p)
- * must be used. Since p->mm != NULL and we hold ->mmap_lock
- * it can't fail.
- *
- * Note also that "g" can be the old leader with ->mm == NULL
- * and already unhashed and thus removed from ->thread_group.
- * This is OK, __unhash_process()->list_del_rcu() does not
- * clear the ->next pointer, we will find the new leader via
- * next_thread().
- */
- rcu_read_lock();
- for_each_process(g) {
- if (g == tsk->group_leader)
- continue;
- if (g->flags & PF_KTHREAD)
- continue;
-
- for_each_thread(g, p) {
- if (unlikely(!p->mm))
- continue;
- if (unlikely(p->mm == mm)) {
- lock_task_sighand(p, &flags);
- nr += zap_process(p, exit_code,
- SIGNAL_GROUP_EXIT);
- unlock_task_sighand(p, &flags);
- }
- break;
- }
- }
- rcu_read_unlock();
-done:
- atomic_set(&core_state->nr_threads, nr);
return nr;
}
static int coredump_wait(int exit_code, struct core_state *core_state)
{
struct task_struct *tsk = current;
- struct mm_struct *mm = tsk->mm;
int core_waiters = -EBUSY;
init_completion(&core_state->startup);
core_state->dumper.task = tsk;
core_state->dumper.next = NULL;
- if (mmap_write_lock_killable(mm))
- return -EINTR;
-
- if (!mm->core_state)
- core_waiters = zap_threads(tsk, mm, core_state, exit_code);
- mmap_write_unlock(mm);
-
+ core_waiters = zap_threads(tsk, core_state, exit_code);
if (core_waiters > 0) {
struct core_thread *ptr;
@@ -483,7 +418,7 @@ static int coredump_wait(int exit_code, struct core_state *core_state)
return core_waiters;
}
-static void coredump_finish(struct mm_struct *mm, bool core_dumped)
+static void coredump_finish(bool core_dumped)
{
struct core_thread *curr, *next;
struct task_struct *task;
@@ -493,22 +428,21 @@ static void coredump_finish(struct mm_struct *mm, bool core_dumped)
current->signal->group_exit_code |= 0x80;
current->signal->group_exit_task = NULL;
current->signal->flags = SIGNAL_GROUP_EXIT;
+ next = current->signal->core_state->dumper.next;
+ current->signal->core_state = NULL;
spin_unlock_irq(&current->sighand->siglock);
- next = mm->core_state->dumper.next;
while ((curr = next) != NULL) {
next = curr->next;
task = curr->task;
/*
- * see exit_mm(), curr->task must not see
+ * see coredump_task_exit(), curr->task must not see
* ->task == NULL before we read ->next.
*/
smp_mb();
curr->task = NULL;
wake_up_process(task);
}
-
- mm->core_state = NULL;
}
static bool dump_interrupted(void)
@@ -839,7 +773,7 @@ fail_dropcount:
fail_unlock:
kfree(argv);
kfree(cn.corename);
- coredump_finish(mm, core_dumped);
+ coredump_finish(core_dumped);
revert_creds(old_cred);
fail_creds:
put_cred(cred);
diff --git a/fs/exec.c b/fs/exec.c
index a098c133d8d7..b6079f1a098e 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -987,16 +987,14 @@ static int exec_mmap(struct mm_struct *mm)
if (old_mm) {
/*
- * Make sure that if there is a core dump in progress
- * for the old mm, we get out and die instead of going
- * through with the exec. We must hold mmap_lock around
- * checking core_state and changing tsk->mm.
+ * If there is a pending fatal signal perhaps a signal
+ * whose default action is to create a coredump get
+ * out and die instead of going through with the exec.
*/
- mmap_read_lock(old_mm);
- if (unlikely(old_mm->core_state)) {
- mmap_read_unlock(old_mm);
+ ret = mmap_read_lock_killable(old_mm);
+ if (ret) {
up_write(&tsk->signal->exec_update_lock);
- return -EINTR;
+ return ret;
}
}
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 77cf4187adec..ff869a66b34e 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -408,9 +408,9 @@ static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
cpumask_pr_args(&task->cpus_mask));
}
-static inline void task_core_dumping(struct seq_file *m, struct mm_struct *mm)
+static inline void task_core_dumping(struct seq_file *m, struct task_struct *task)
{
- seq_put_decimal_ull(m, "CoreDumping:\t", !!mm->core_state);
+ seq_put_decimal_ull(m, "CoreDumping:\t", !!task->signal->core_state);
seq_putc(m, '\n');
}
@@ -436,7 +436,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
if (mm) {
task_mem(m, mm);
- task_core_dumping(m, mm);
+ task_core_dumping(m, task);
task_thp_status(m, mm);
mmput(mm);
}
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 8f3131477ec6..f7326c8704bb 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -454,17 +454,6 @@ struct vm_area_struct {
struct vm_userfaultfd_ctx vm_userfaultfd_ctx;
} __randomize_layout;
-struct core_thread {
- struct task_struct *task;
- struct core_thread *next;
-};
-
-struct core_state {
- atomic_t nr_threads;
- struct core_thread dumper;
- struct completion startup;
-};
-
struct kioctx_table;
struct mm_struct {
struct {
@@ -585,8 +574,6 @@ struct mm_struct {
unsigned long flags; /* Must use atomic bitops to access */
- struct core_state *core_state; /* coredumping support */
-
#ifdef CONFIG_AIO
spinlock_t ioctx_lock;
struct kioctx_table __rcu *ioctx_table;
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index b5ebf6c01292..8aee2945ff08 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -362,29 +362,25 @@ static inline void user_single_step_report(struct pt_regs *regs)
#ifndef arch_ptrace_stop_needed
/**
* arch_ptrace_stop_needed - Decide whether arch_ptrace_stop() should be called
- * @code: current->exit_code value ptrace will stop with
- * @info: siginfo_t pointer (or %NULL) for signal ptrace will stop with
*
* This is called with the siglock held, to decide whether or not it's
- * necessary to release the siglock and call arch_ptrace_stop() with the
- * same @code and @info arguments. It can be defined to a constant if
- * arch_ptrace_stop() is never required, or always is. On machines where
- * this makes sense, it should be defined to a quick test to optimize out
- * calling arch_ptrace_stop() when it would be superfluous. For example,
- * if the thread has not been back to user mode since the last stop, the
- * thread state might indicate that nothing needs to be done.
+ * necessary to release the siglock and call arch_ptrace_stop(). It can be
+ * defined to a constant if arch_ptrace_stop() is never required, or always
+ * is. On machines where this makes sense, it should be defined to a quick
+ * test to optimize out calling arch_ptrace_stop() when it would be
+ * superfluous. For example, if the thread has not been back to user mode
+ * since the last stop, the thread state might indicate that nothing needs
+ * to be done.
*
* This is guaranteed to be invoked once before a task stops for ptrace and
* may include arch-specific operations necessary prior to a ptrace stop.
*/
-#define arch_ptrace_stop_needed(code, info) (0)
+#define arch_ptrace_stop_needed() (0)
#endif
#ifndef arch_ptrace_stop
/**
* arch_ptrace_stop - Do machine-specific work before stopping for ptrace
- * @code: current->exit_code value ptrace will stop with
- * @info: siginfo_t pointer (or %NULL) for signal ptrace will stop with
*
* This is called with no locks held when arch_ptrace_stop_needed() has
* just returned nonzero. It is allowed to block, e.g. for user memory
@@ -394,7 +390,7 @@ static inline void user_single_step_report(struct pt_regs *regs)
* we only do it when the arch requires it for this particular stop, as
* indicated by arch_ptrace_stop_needed().
*/
-#define arch_ptrace_stop(code, info) do { } while (0)
+#define arch_ptrace_stop() do { } while (0)
#endif
#ifndef current_pt_regs
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 6f6f8f340a0f..78c351e35fec 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1661,6 +1661,7 @@ extern struct pid *cad_pid;
#define PF_VCPU 0x00000001 /* I'm a virtual CPU */
#define PF_IDLE 0x00000002 /* I am an IDLE thread */
#define PF_EXITING 0x00000004 /* Getting shut down */
+#define PF_POSTCOREDUMP 0x00000008 /* Coredumps should ignore this task */
#define PF_IO_WORKER 0x00000010 /* Task is an IO worker */
#define PF_WQ_WORKER 0x00000020 /* I'm a workqueue worker */
#define PF_FORKNOEXEC 0x00000040 /* Forked but didn't exec */
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index e5f4ce622ee6..a8fe2a593a3a 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -72,6 +72,17 @@ struct multiprocess_signals {
struct hlist_node node;
};
+struct core_thread {
+ struct task_struct *task;
+ struct core_thread *next;
+};
+
+struct core_state {
+ atomic_t nr_threads;
+ struct core_thread dumper;
+ struct completion startup;
+};
+
/*
* NOTE! "signal_struct" does not have its own
* locking, because a shared signal_struct always
@@ -110,6 +121,8 @@ struct signal_struct {
int group_stop_count;
unsigned int flags; /* see SIGNAL_* flags below */
+ struct core_state *core_state; /* coredumping support */
+
/*
* PR_SET_CHILD_SUBREAPER marks a process, like a service
* manager, to re-parent orphan (double-forking) child processes
diff --git a/kernel/exit.c b/kernel/exit.c
index 50f1692c732d..f702a6a63686 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -340,6 +340,46 @@ kill_orphaned_pgrp(struct task_struct *tsk, struct task_struct *parent)
}
}
+static void coredump_task_exit(struct task_struct *tsk)
+{
+ struct core_state *core_state;
+
+ /*
+ * Serialize with any possible pending coredump.
+ * We must hold siglock around checking core_state
+ * and setting PF_POSTCOREDUMP. The core-inducing thread
+ * will increment ->nr_threads for each thread in the
+ * group without PF_POSTCOREDUMP set.
+ */
+ spin_lock_irq(&tsk->sighand->siglock);
+ tsk->flags |= PF_POSTCOREDUMP;
+ core_state = tsk->signal->core_state;
+ spin_unlock_irq(&tsk->sighand->siglock);
+ if (core_state) {
+ struct core_thread self;
+
+ self.task = current;
+ if (self.task->flags & PF_SIGNALED)
+ self.next = xchg(&core_state->dumper.next, &self);
+ else
+ self.task = NULL;
+ /*
+ * Implies mb(), the result of xchg() must be visible
+ * to core_state->dumper.
+ */
+ if (atomic_dec_and_test(&core_state->nr_threads))
+ complete(&core_state->startup);
+
+ for (;;) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (!self.task) /* see coredump_finish() */
+ break;
+ freezable_schedule();
+ }
+ __set_current_state(TASK_RUNNING);
+ }
+}
+
#ifdef CONFIG_MEMCG
/*
* A task is exiting. If it owned this mm, find a new owner for the mm.
@@ -435,47 +475,12 @@ assign_new_owner:
static void exit_mm(void)
{
struct mm_struct *mm = current->mm;
- struct core_state *core_state;
exit_mm_release(current, mm);
if (!mm)
return;
sync_mm_rss(mm);
- /*
- * Serialize with any possible pending coredump.
- * We must hold mmap_lock around checking core_state
- * and clearing tsk->mm. The core-inducing thread
- * will increment ->nr_threads for each thread in the
- * group with ->mm != NULL.
- */
mmap_read_lock(mm);
- core_state = mm->core_state;
- if (core_state) {
- struct core_thread self;
-
- mmap_read_unlock(mm);
-
- self.task = current;
- if (self.task->flags & PF_SIGNALED)
- self.next = xchg(&core_state->dumper.next, &self);
- else
- self.task = NULL;
- /*
- * Implies mb(), the result of xchg() must be visible
- * to core_state->dumper.
- */
- if (atomic_dec_and_test(&core_state->nr_threads))
- complete(&core_state->startup);
-
- for (;;) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- if (!self.task) /* see coredump_finish() */
- break;
- freezable_schedule();
- }
- __set_current_state(TASK_RUNNING);
- mmap_read_lock(mm);
- }
mmgrab(mm);
BUG_ON(mm != current->active_mm);
/* more a memory barrier than a real lock */
@@ -763,6 +768,7 @@ void __noreturn do_exit(long code)
profile_task_exit(tsk);
kcov_task_exit(tsk);
+ coredump_task_exit(tsk);
ptrace_event(PTRACE_EVENT_EXIT, code);
validate_creds_for_do_exit(tsk);
diff --git a/kernel/fork.c b/kernel/fork.c
index 8e9feeef555e..3f112b11a9ad 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1043,7 +1043,6 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,
seqcount_init(&mm->write_protect_seq);
mmap_init_lock(mm);
INIT_LIST_HEAD(&mm->mmlist);
- mm->core_state = NULL;
mm_pgtables_bytes_init(mm);
mm->map_count = 0;
mm->locked_vm = 0;
@@ -1391,8 +1390,7 @@ static void mm_release(struct task_struct *tsk, struct mm_struct *mm)
* purposes.
*/
if (tsk->clear_child_tid) {
- if (!(tsk->signal->flags & SIGNAL_GROUP_COREDUMP) &&
- atomic_read(&mm->mm_users) > 1) {
+ if (atomic_read(&mm->mm_users) > 1) {
/*
* We don't check the error code - if userspace has
* not set up a proper pointer then tough luck.
diff --git a/kernel/signal.c b/kernel/signal.c
index e99aff33ff14..6f3476dc7873 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2145,40 +2145,6 @@ static void do_notify_parent_cldstop(struct task_struct *tsk,
spin_unlock_irqrestore(&sighand->siglock, flags);
}
-static inline bool may_ptrace_stop(void)
-{
- if (!likely(current->ptrace))
- return false;
- /*
- * Are we in the middle of do_coredump?
- * If so and our tracer is also part of the coredump stopping
- * is a deadlock situation, and pointless because our tracer
- * is dead so don't allow us to stop.
- * If SIGKILL was already sent before the caller unlocked
- * ->siglock we must see ->core_state != NULL. Otherwise it
- * is safe to enter schedule().
- *
- * This is almost outdated, a task with the pending SIGKILL can't
- * block in TASK_TRACED. But PTRACE_EVENT_EXIT can be reported
- * after SIGKILL was already dequeued.
- */
- if (unlikely(current->mm->core_state) &&
- unlikely(current->mm == current->parent->mm))
- return false;
-
- return true;
-}
-
-/*
- * Return non-zero if there is a SIGKILL that should be waking us up.
- * Called with the siglock held.
- */
-static bool sigkill_pending(struct task_struct *tsk)
-{
- return sigismember(&tsk->pending.signal, SIGKILL) ||
- sigismember(&tsk->signal->shared_pending.signal, SIGKILL);
-}
-
/*
* This must be called with current->sighand->siglock held.
*
@@ -2196,7 +2162,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, kernel_siginfo_t
{
bool gstop_done = false;
- if (arch_ptrace_stop_needed(exit_code, info)) {
+ if (arch_ptrace_stop_needed()) {
/*
* The arch code has something special to do before a
* ptrace stop. This is allowed to block, e.g. for faults
@@ -2204,17 +2170,16 @@ static void ptrace_stop(int exit_code, int why, int clear_code, kernel_siginfo_t
* calling arch_ptrace_stop, so we must release it now.
* To preserve proper semantics, we must do this before
* any signal bookkeeping like checking group_stop_count.
- * Meanwhile, a SIGKILL could come in before we retake the
- * siglock. That must prevent us from sleeping in TASK_TRACED.
- * So after regaining the lock, we must check for SIGKILL.
*/
spin_unlock_irq(&current->sighand->siglock);
- arch_ptrace_stop(exit_code, info);
+ arch_ptrace_stop();
spin_lock_irq(&current->sighand->siglock);
- if (sigkill_pending(current))
- return;
}
+ /*
+ * schedule() will not sleep if there is a pending signal that
+ * can awaken the task.
+ */
set_special_state(TASK_TRACED);
/*
@@ -2260,7 +2225,7 @@ static void ptrace_stop(int exit_code, int why, int clear_code, kernel_siginfo_t
spin_unlock_irq(&current->sighand->siglock);
read_lock(&tasklist_lock);
- if (may_ptrace_stop()) {
+ if (likely(current->ptrace)) {
/*
* Notify parents of the stop.
*
diff --git a/mm/debug.c b/mm/debug.c
index 714be101dec9..d0020fc58202 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -216,7 +216,7 @@ void dump_mm(const struct mm_struct *mm)
"start_code %lx end_code %lx start_data %lx end_data %lx\n"
"start_brk %lx brk %lx start_stack %lx\n"
"arg_start %lx arg_end %lx env_start %lx env_end %lx\n"
- "binfmt %px flags %lx core_state %px\n"
+ "binfmt %px flags %lx\n"
#ifdef CONFIG_AIO
"ioctx_table %px\n"
#endif
@@ -248,7 +248,7 @@ void dump_mm(const struct mm_struct *mm)
mm->start_code, mm->end_code, mm->start_data, mm->end_data,
mm->start_brk, mm->brk, mm->start_stack,
mm->arg_start, mm->arg_end, mm->env_start, mm->env_end,
- mm->binfmt, mm->flags, mm->core_state,
+ mm->binfmt, mm->flags,
#ifdef CONFIG_AIO
mm->ioctx_table,
#endif
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 989f35a2bbb1..50b984d048ce 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -787,9 +787,9 @@ static inline bool __task_will_free_mem(struct task_struct *task)
struct signal_struct *sig = task->signal;
/*
- * A coredumping process may sleep for an extended period in exit_mm(),
- * so the oom killer cannot assume that the process will promptly exit
- * and release memory.
+ * A coredumping process may sleep for an extended period in
+ * coredump_task_exit(), so the oom killer cannot assume that
+ * the process will promptly exit and release memory.
*/
if (sig->flags & SIGNAL_GROUP_COREDUMP)
return false;
generated by cgit (git 2.34.1) at 2024-05-26 22:13:48 +0000