The patch titled
put_pid: make sure we don't free the live pid
has been added to the -mm tree. Its filename is
put_pid-make-sure-we-dont-free-the-live-pid.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: put_pid: make sure we don't free the live pid
From: Oleg Nesterov <[EMAIL PROTECTED]>
Add the temporary (for -mm only) debugging code to catch the unbalanced
put_pid()'s. At least those which can free the "live" pid.
Signed-off-by: Oleg Nesterov <[EMAIL PROTECTED]>
Cc: Roland McGrath <[EMAIL PROTECTED]>
Cc: "Eric W. Biederman" <[EMAIL PROTECTED]>
Cc: Pavel Emelyanov <[EMAIL PROTECTED]>
Cc: Kamalesh Babulal <[EMAIL PROTECTED]>
Cc: Alan Cox <[EMAIL PROTECTED]>
Cc: [EMAIL PROTECTED]
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
kernel/pid.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN kernel/pid.c~put_pid-make-sure-we-dont-free-the-live-pid kernel/pid.c
--- a/kernel/pid.c~put_pid-make-sure-we-dont-free-the-live-pid
+++ a/kernel/pid.c
@@ -210,6 +210,10 @@ void put_pid(struct pid *pid)
ns = pid->numbers[pid->level].ns;
if ((atomic_read(&pid->count) == 1) ||
atomic_dec_and_test(&pid->count)) {
+ int type = PIDTYPE_MAX;
+ while (--type >= 0)
+ if (WARN_ON(!hlist_empty(&pid->tasks[type])))
+ return;
kmem_cache_free(ns->pid_cachep, pid);
put_pid_ns(ns);
}
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
kthread-synchronization-issues.patch
kthread-add-a-missing-memory-barrier-to-kthread_stop.patch
kthread-call-wake_up_process-without-the-lock-being-held.patch
mmap_region-cleanup-the-final-vma_merge-related-code.patch
remove-unused-variable-from-send_signal.patch
turn-legacy_queue-macro-into-static-inline-function.patch
consolidate-checking-for-ignored-legacy-signals.patch
consolidate-checking-for-ignored-legacy-signals-simplify.patch
signals-do_signal_stop-use-signal_group_exit.patch
signals-do_group_exit-use-signal_group_exit-more-consistently.patch
lock_task_sighand-add-rcu-lock-unlock.patch
k_getrusage-dont-take-rcu_read_lock.patch
do_task_stat-dont-take-rcu_read_lock.patch
workqueues-shrink-cpu_populated_map-when-cpu-dies.patch
workqueues-shrink-cpu_populated_map-when-cpu-dies-fix.patch
cleanup_workqueue_thread-remove-the-unneeded-cpu-parameter.patch
simplify-cpu_hotplug_begin-put_online_cpus.patch
timers-simplify-lockdep-stuff.patch
hrtimers-simplify-lockdep-stuff.patch
kill-double_spin_lock.patch
redo-locking-of-tty-pgrp.patch
procfs-task-exe-symlink.patch
procfs-task-exe-symlink-fix.patch
procfs-task-exe-symlink-fix-2.patch
free_pidmap-turn-it-into-free_pidmapstruct-upid.patch
put_pid-make-sure-we-dont-free-the-live-pid.patch
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