The patch titled
exit: move taskstats_tgid_free() from __exit_signal() to free_signal_struct()
has been added to the -mm tree. Its filename is
exit-move-taskstats_tgid_free-from-__exit_signal-to-free_signal_struct.patch
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------------------------------------------------------
Subject: exit: move taskstats_tgid_free() from __exit_signal() to free_signal_struct()
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Move taskstats_tgid_free() from __exit_signal() to free_signal_struct().
This way signal->stats never points to nowhere and we can read ->stats
lockless.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
Cc: Roland McGrath <roland@xxxxxxxxxx>
Cc: Veaceslav Falico <vfalico@xxxxxxxxxx>
Cc: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/exit.c | 1 -
kernel/fork.c | 1 +
2 files changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/exit.c~exit-move-taskstats_tgid_free-from-__exit_signal-to-free_signal_struct kernel/exit.c
--- a/kernel/exit.c~exit-move-taskstats_tgid_free-from-__exit_signal-to-free_signal_struct
+++ a/kernel/exit.c
@@ -145,7 +145,6 @@ static void __exit_signal(struct task_st
clear_tsk_thread_flag(tsk,TIF_SIGPENDING);
if (group_dead) {
flush_sigqueue(&sig->shared_pending);
- taskstats_tgid_free(sig);
tty_kref_put(tty);
}
}
diff -puN kernel/fork.c~exit-move-taskstats_tgid_free-from-__exit_signal-to-free_signal_struct kernel/fork.c
--- a/kernel/fork.c~exit-move-taskstats_tgid_free-from-__exit_signal-to-free_signal_struct
+++ a/kernel/fork.c
@@ -167,6 +167,7 @@ EXPORT_SYMBOL(free_task);
static inline void free_signal_struct(struct signal_struct *sig)
{
+ taskstats_tgid_free(sig);
kmem_cache_free(signal_cachep, sig);
}
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
linux-next.patch
cpu-timers-simplify-rlimit_cpu-handling.patch
cpu-timers-cleanup-arm_timer.patch
cpu-timers-return-correct-previous-timer-reload-value.patch
cpu-timers-change-sigev_none-timer-implementation.patch
cpu-timers-assure-to-not-iterate-over-all-threads-in-fastpath_timer_check.patch
cpu-timers-optimize-run_posix_cpu_timers.patch
proc-cleanup-remove-unused-assignments.patch
kmod-add-init-function-to-usermodehelper.patch
exec-replace-call_usermodehelper_pipe-with-use-of-umh-init-function-and-resolve-limit.patch
umh-creds-convert-call_usermodehelper_keys-to-use-subprocess_info-init.patch
umh-creds-kill-subprocess_info-cred-logic.patch
call_usermodehelper-no-need-to-unblock-signals.patch
wait_for_helper-sigchld-from-user-space-can-lead-to-use-after-free.patch
call_usermodehelper-simplify-fix-umh_no_wait-case.patch
call_usermodehelper-umh_wait_exec-ignores-kernel_thread-failure.patch
coredump-factor-out-the-not-ispipe-file-checks.patch
coredump-cleanup-ispipe-code.patch
coredump-factor-out-put_cred-calls.patch
coredump-shift-down_writemmap_sem-into-coredump_wait.patch
exit-exit_notify-can-trust-signal-notify_count-0.patch
exit-change-zap_other_threads-to-count-sub-threads.patch
exit-avoid-sig-count-in-de_thread-__exit_signal-synchronization.patch
exit-avoid-sig-count-in-__exit_signal-to-detect-the-group-dead-case.patch
posix-cpu-timers-avoid-task-signal-=-null-checks.patch
ia64-ptrace_attach_sync_user_rbs-avoid-task-signal-=-null-checks.patch
fork-exit-move-tty_kref_put-outside-of-__cleanup_signal.patch
signals-make-task_struct-signal-immutable-refcountable.patch
signals-clear-signal-tty-when-the-last-thread-exits.patch
signals-kill-the-awful-task_rq_unlock_wait-hack.patch
exit-__exit_signal-use-thread_group_leader-consistently.patch
kill-the-obsolete-thread_group_cputime_free-and-taskstats_tgid_init-helpers.patch
exit-move-taskstats_tgid_free-from-__exit_signal-to-free_signal_struct.patch
check_unshare_flags-kill-the-bogus-clone_sighand-sig-count-check.patch
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