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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-02-05 07:27:24 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 18:44:07 +0100 |
| commit | ed5d2cac114202fe2978a9cbcab8f5032796d538 (patch) | |
| tree | aa9aaea1aa0945bd9159685d1b04897d105a90c9 /fs/binfmt_elf.c | |
| parent | remove handle_group_stop() in favor of do_signal_stop() (diff) | |
| download | linux-ed5d2cac114202fe2978a9cbcab8f5032796d538.tar.xz linux-ed5d2cac114202fe2978a9cbcab8f5032796d538.zip | |
exec: rework the group exit and fix the race with kill
As Roland pointed out, we have the very old problem with exec. de_thread()
sets SIGNAL_GROUP_EXIT, kills other threads, changes ->group_leader and then
clears signal->flags. All signals (even fatal ones) sent in this window
(which is not too small) will be lost.
With this patch exec doesn't abuse SIGNAL_GROUP_EXIT. signal_group_exit(),
the new helper, should be used to detect exit_group() or exec() in progress.
It can have more users, but this patch does only strictly necessary changes.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Robin Holt <holt@sgi.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/binfmt_elf.c')
0 files changed, 0 insertions, 0 deletions