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| author |   Oleg Nesterov <oleg@redhat.com> | 2012-03-14 19:55:38 +0100 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-20 14:16:50 -0700 |
| commit | 5f8aadd8b9966d71a77bba52b9d499cc2f38269f (patch) | |
| tree | 229735d79edf0c4cc82ac00ba1abaee63040ff6e /kernel/exit.c | |
| parent | Merge tag 'usb-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb (diff) | |
| download | linux-dev-5f8aadd8b9966d71a77bba52b9d499cc2f38269f.tar.xz linux-dev-5f8aadd8b9966d71a77bba52b9d499cc2f38269f.zip | |
CLONE_PARENT shouldn't allow to set ->exit_signal
The child must not control its ->exit_signal, it is the parent who
decides which signal the child should use for notification.
This means that CLONE_PARENT should not use "clone_flags & CSIGNAL",
the forking task is the sibling of the new process and their parent
doesn't control exit_signal in this case.
This patch uses ->exit_signal of the forking process, but perhaps
we should simply use SIGCHLD.
We read group_leader->exit_signal lockless, this can race with the
ORIGINAL_SIGNAL -> SIGCHLD transition, but this is fine.
Potentially this change allows to kill self_exec_id/parent_exec_id.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/exit.c')
0 files changed, 0 insertions, 0 deletions