tree ff8effec1d05d871bcbb1347947d2a0970a8ff32
parent 7a5e873f096e04e6d8719e4ecb7b70d2decca503
author Oleg Nesterov <oleg@tv-sign.ru> 1209541985 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1209569377 -0700

signals: allow the kernel to actually kill /sbin/init

Currently the buggy /sbin/init hangs if SIGSEGV/etc happens.  The kernel sends
the signal, init dequeues it and ignores, returns from the exception, repeats
the faulting instruction, and so on forever.

Imho, such a behaviour is not good.  I think that the explicit loud death of
the buggy /sbin/init is better than the silent hang.

Change force_sig_info() to clear SIGNAL_UNKILLABLE when the task should be
really killed.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>