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authorOleg Nesterov <oleg@tv-sign.ru>2006-02-15 14:13:24 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-15 13:21:23 -0500
commit3f17da699431ec48540beabc55c54d4b5e66c8e7 (patch)
tree0cc68e5daea5d4532a0225aa47cce193a32f6655 /net/ipv4/syncookies.c
parent7775aa7690c26b3c5606090a43533a7a7429eb91 (diff)
[PATCH] fix kill_proc_info() vs CLONE_THREAD race
There is a window after copy_process() unlocks ->sighand.siglock and before it adds the new thread to the thread list. In that window __group_complete_signal(SIGKILL) will not see the new thread yet, so this thread will start running while the whole thread group was supposed to exit. I beleive we have another good reason to place attach_pid(PID/TGID) under ->sighand.siglock. We can do the same for release_task()->__unhash_process() de_thread()->switch_exec_pids() After that we don't need tasklist_lock to iterate over the thread list, and we can simplify things, see for example do_sigaction() or sys_times(). Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Roland McGrath <roland@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net/ipv4/syncookies.c')
0 files changed, 0 insertions, 0 deletions