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Date: Thu, 5 Sep 2002 01:32:40 -0700
From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@zip.com.au>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [BUG] __write_lock_failed() oops
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William Lee Irwin III wrote:
>> After running 64 simultaneous tiobench 256's a few times,
>> I get the following oops, which I've been seeing intermittently
>> for a number of 2.5.x releases (since 2.5.x booted on NUMA-Q):
>> Program received signal SIGSEGV, Segmentation fault.
>> 0xc0106693 in __write_lock_failed () at semaphore.c:176
>> 176     semaphore.c: No such file or directory.
>>         in semaphore.c

On Thu, Sep 05, 2002 at 01:42:52AM -0700, Andrew Morton wrote:
> That's all the assembly hacks in the rwlock code not having proper
> stack frames.  You may have to ksymoops it.
> At a guess: use-after-free bug against an address_space.  You may
> be able to catch it with slab poisoning.

(gdb) p/x $eax
$25 = 0xc0331ca0
(gdb) p &tasklist_lock
$27 = (rwlock_t *) 0xc0331ca0


Cheers,
Bill
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