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authorEric W. Biederman <ebiederm@xmission.com>2006-03-28 19:10:58 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-28 21:36:40 -0500
commitfef23e7fbb11a0a78cd61935f7056bc2b237995a (patch)
treea6ff460b3a5d11d01c0532de561eb81183e056c2 /kernel/signal.c
parentca9ba4471c1203bb6e759b76e83167fec54fe590 (diff)
[PATCH] exec: allow init to exec from any thread.
After looking at the problem of init calling exec some more I figured out an easy way to make the code work. The actual symptom without out this patch is that all threads will die except pid == 1, and the thread calling exec. The thread calling exec will wait forever for pid == 1 to die. Since pid == 1 does not install a handler for SIGKILL it will never die. This modifies the tests for init from current->pid == 1 to the equivalent current == child_reaper. And then it causes exec in the ugly case to modify child_reaper. The only weird symptom is that you wind up with an init process that doesn't have the oldest start time on the box. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 75f7341b0c39..dc8f91bf9f89 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1990,7 +1990,7 @@ relock:
1990 continue; 1990 continue;
1991 1991
1992 /* Init gets no signals it doesn't want. */ 1992 /* Init gets no signals it doesn't want. */
1993 if (current->pid == 1) 1993 if (current == child_reaper)
1994 continue; 1994 continue;
1995 1995
1996 if (sig_kernel_stop(signr)) { 1996 if (sig_kernel_stop(signr)) {