From: Dave Jones <davej@redhat.com>
To: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
mingo@redhat.com
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: fix __exit_mm() dereference before check.
Date: Fri, 16 Apr 2004 22:08:28 +0100 [thread overview]
Message-ID: <20040416210828.GK20937@redhat.com> (raw)
>From a quick look, it appears passing NULL mm's down to mm_release()
isn't a good idea.
Dave
--- linux-2.6.5/kernel/exit.c~ 2004-04-16 22:06:00.000000000 +0100
+++ linux-2.6.5/kernel/exit.c 2004-04-16 22:06:51.000000000 +0100
@@ -482,9 +482,10 @@
{
struct mm_struct *mm = tsk->mm;
- mm_release(tsk, mm);
if (!mm)
return;
+ mm_release(tsk, mm);
+
/*
* Serialize with any possible pending coredump.
* We must hold mmap_sem around checking core_waiters
next reply other threads:[~2004-04-16 21:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-16 21:08 Dave Jones [this message]
2004-04-16 22:01 ` fix __exit_mm() dereference before check Linus Torvalds
2004-04-16 22:13 ` Dave Jones
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