The patch titled
exit_notify: don't take tasklist for TIF_SIGPENDING re-targeting
has been added to the -mm tree. Its filename is
exit_notify-dont-take-tasklist-for-tif_sigpending-re-targeting.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: exit_notify: don't take tasklist for TIF_SIGPENDING re-targeting
From: Oleg Nesterov <oleg@xxxxxxxxxx>
->siglock provides enough protection to iterate over the thread group.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: Roland McGrath <roland@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/exit.c | 5 +----
1 files changed, 1 insertion(+), 4 deletions(-)
diff -puN kernel/exit.c~exit_notify-dont-take-tasklist-for-tif_sigpending-re-targeting kernel/exit.c
--- a/kernel/exit.c~exit_notify-dont-take-tasklist-for-tif_sigpending-re-targeting
+++ a/kernel/exit.c
@@ -755,13 +755,11 @@ static void exit_notify(struct task_stru
* Now we'll wake all the threads in the group just to make
* sure someone gets all the pending signals.
*/
- read_lock(&tasklist_lock);
spin_lock_irq(&tsk->sighand->siglock);
for (t = next_thread(tsk); t != tsk; t = next_thread(t))
if (!signal_pending(t) && !(t->flags & PF_EXITING))
recalc_sigpending_and_wake(t);
spin_unlock_irq(&tsk->sighand->siglock);
- read_unlock(&tasklist_lock);
}
write_lock_irq(&tasklist_lock);
@@ -789,9 +787,8 @@ static void exit_notify(struct task_stru
* and we were the only connection outside, so our pgrp
* is about to become orphaned.
*/
-
t = tsk->real_parent;
-
+
pgrp = task_pgrp(tsk);
if ((task_pgrp(t) != pgrp) &&
(task_session(t) == task_session(tsk)) &&
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
fix-theoretical-ccids_readwrite_lock-race.patch
i386-remove-unnecessary-code.patch
clone-flag-clone_parent_tidptr-leaves-invalid-results-in-memory.patch
do_sys_poll-simplify-playing-with-on-stack-data.patch
do_sys_poll-simplify-playing-with-on-stack-data-fix.patch
do_poll-return-eintr-when-signalled.patch
pi-futex-set-pf_exiting-without-taking-pi_lock.patch
do_sigaction-remove-now-unneeded-recalc_sigpending.patch
handle-the-multi-threaded-inits-exit-properly.patch
wait_task_zombie-remove-unneeded-child-signal-check.patch
wait_task_zombie-fix-2-3-races-vs-forget_original_parent.patch
exit_notify-dont-take-tasklist-for-tif_sigpending-re-targeting.patch
cpu-hotplug-slab-cleanup-cpuup_callback.patch
cpu-hotplug-slab-fix-memory-leak-in-cpu-hotplug-error-path.patch
cpu-hotplug-cpu-deliver-cpu_up_canceled-only-to-notify_oked-callbacks-with-cpu_up_prepare.patch
cpu-hotplug-topology-remove-topology_dev_map.patch
cpu-hotplug-thermal_throttle-fix-cpu-hotplug-error-handling.patch
cpu-hotplug-msr-fix-cpu-hotplug-error-handling.patch
cpu-hotplug-cpuid-fix-cpu-hotplug-error-handling.patch
cpu-hotplug-mce-fix-cpu-hotplug-error-handling.patch
cpu-hotplug-intel_cacheinfo-fix-cpu-hotplug-error-handling.patch
cpu-hotplug-intel_cacheinfo-fix-cpu-hotplug-error-handling-fix-a-section-mismatch-warning.patch
workqueue-debug-flushing-deadlocks-with-lockdep.patch
workqueue-debug-work-related-deadlocks-with-lockdep.patch
-
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