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| author |   Oleg Nesterov <oleg@tv-sign.ru> | 2008-01-15 00:02:37 +0300 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-14 13:23:00 -0800 |
| commit | a98fdcef941e107eeabae622d85a1f476f25a160 (patch) | |
| tree | 1702a6e810016eea5e995eb7c91a101688e8c59c /arch | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input (diff) | |
| download | linux-dev-a98fdcef941e107eeabae622d85a1f476f25a160.tar.xz linux-dev-a98fdcef941e107eeabae622d85a1f476f25a160.zip | |
fix the "remove task_ppid_nr_ns" commit
Commit 84427eaef1fb91704c7112bdb598c810003b99f3 (remove task_ppid_nr_ns)
moved the task_tgid_nr_ns(task->real_parent) outside of lock_task_sighand().
This is wrong, ->real_parent could be freed/reused.
Both ->parent/real_parent point to nothing after __exit_signal() because
we remove the child from ->children list, and thus the child can't be
reparented when its parent exits.
rcu_read_lock() protects ->parent/real_parent, but _only_ if we know it was
valid before we take rcu lock.
Revert this part of the patch.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions