From df164db5fd16888ddbe2a63a47b2f6dda9a428b5 Mon Sep 17 00:00:00 2001
From: Alexander Nyberg <alexn@dsv.su.se>
Date: Thu, 23 Jun 2005 00:09:13 -0700
Subject: [PATCH] [PATCH] avoid resursive oopses
Prevent recursive faults in do_exit() by leaving the task alone and wait
for reboot. This may allow a more graceful shutdown and possibly save the
original oops.
Signed-off-by: Alexander Nyberg <alexn@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
kernel/exit.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/kernel/exit.c b/kernel/exit.c
index 2ef2ad540201..c2bdf6fb61a5 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -793,6 +793,17 @@ fastcall NORET_TYPE void do_exit(long code)
ptrace_notify((PTRACE_EVENT_EXIT << 8) | SIGTRAP);
}
+ /*
+ * We're taking recursive faults here in do_exit. Safest is to just
+ * leave this task alone and wait for reboot.
+ */
+ if (unlikely(tsk->flags & PF_EXITING)) {
+ printk(KERN_ALERT
+ "Fixing recursive fault but reboot is needed!\n");
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule();
+ }
+
tsk->flags |= PF_EXITING;
/*
--
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