]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
ptrace: wait_task_zombie: do not account traced sub-threads
authorOleg Nesterov <oleg@redhat.com>
Thu, 18 Jun 2009 23:49:11 +0000 (16:49 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 19 Jun 2009 23:46:06 +0000 (16:46 -0700)
commitbefca96779b0259ac8fad0183e748a62935c39cb
treeab4962e27ce10abc932de4c7a4c1c29fac2988cf
parente6229bec25be4ba00f31dd26e25721cc96c22262
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>
kernel/exit.c