From: Richard Weinberger <richard@nod.at>
Date: Wed, 25 May 2011 00:13:04 +0000 (-0700)
Subject: um: fix crash while os_dump_core()
X-Git-Tag: 2.1b_release~4018
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=db271cf03f5fe39feab8e1b1818c0880c7290c5c;p=platform%2Fkernel%2Fkernel-mfld-blackbay.git

um: fix crash while os_dump_core()

os_dump_core() emits SIGTERM to terminate all UML processes.  Kernel
threads have to exit on SIGTERM instead of calling last_ditch_exit().
Multiple calls to last_ditch_exit() can cause a crash.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index e0477c3..0c45dc8 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -253,6 +253,7 @@ void init_new_thread_signals(void)
 		    SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGALRM,
 		    SIGVTALRM, -1);
 	signal(SIGWINCH, SIG_IGN);
+	signal(SIGTERM, SIG_DFL);
 }
 
 int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr)