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| author | Oleg Nesterov <oleg@redhat.com> | 2009-06-19 01:49:11 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-20 01:46:06 +0200 |
| commit | befca96779b0259ac8fad0183e748a62935c39cb (patch) | |
| tree | ab4962e27ce10abc932de4c7a4c1c29fac2988cf /drivers/char/dtlk.c | |
| parent | rtc: make rtc_update_irq callable with irqs enabled (diff) | |
| download | linux-befca96779b0259ac8fad0183e748a62935c39cb.tar.xz linux-befca96779b0259ac8fad0183e748a62935c39cb.zip | |
ptrace: wait_task_zombie: do not account traced sub-threads
The bug is ancient.
If we trace the sub-thread of our natural child and this sub-thread exits,
we update parent->signal->cxxx fields. But we should not do this until
the whole thread-group exits, otherwise we account this thread (and all
other live threads) twice.
Add the task_detached() check. No need to check thread_group_empty(),
wait_consider_task()->delay_group_leader() already did this.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Vitaly Mayatskikh <vmayatsk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/dtlk.c')
0 files changed, 0 insertions, 0 deletions