From: Andrew Morton <akpm@digeo.com>
To: Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Trond Myklebust <trond.myklebust@fys.uio.no>,
Neil Brown <neilb@cse.unsw.edu.au>
Subject: Re: 2.5.69-mm9
Date: Sun, 25 May 2003 15:48:40 -0700 [thread overview]
Message-ID: <20030525154840.3ba7609b.akpm@digeo.com> (raw)
In-Reply-To: <1053899811.750.1.camel@teapot.felipe-alfaro.com>
Felipe Alfaro Solana <felipe_alfaro@linuxmail.org> wrote:
>
> Unable to handle kernel paging request at virtual address c8df7014
> printing eip:
> e08d1a9b
> *pde = 00023067
> *pte = 08df7000
> Oops: 0000 [#1]
> CPU: 0
> EIP: 0060:[<e08d1a9b>] Not tainted VLI
> EFLAGS: 00010206
> EIP is at svc_udp_recvfrom+0x52b/0x560 [sunrpc]
> eax: dda32004 ebx: c8df7004 ecx: ddff0004 edx: d73ba938
> esi: c8df7004 edi: d68549c4 ebp: 0000808c esp: de3d3eec
> ds: 007b es: 007b ss: 0068
> Process nfsd (pid: 2182, threadinfo=de3d2000 task=d6490000)
> Stack: de3d3f04 d73ba938 ddff0004 c012d4b5 de3d3f04 de3d3f04 c02ea1b0 de3e1f04
> 0082863d 1d244b3c 00000000 00000005 c02b4e54 00000000 00000000 4b87ad6e
> c012d3e0 d6490000 00000000 de3d2000 d73ba938 ddff0004 00000000 e08d384e
> Call Trace:
> [<c012d4b5>] schedule_timeout+0xc5/0xe0
> [<c012d3e0>] process_timeout+0x0/0x10
> [<e08d384e>] svc_recv+0x67e/0x850 [sunrpc]
> [<c011db20>] default_wake_function+0x0/0x20
> [<e08d06c2>] svc_process+0x4e2/0x690 [sunrpc]
> [<c011db20>] default_wake_function+0x0/0x20
> [<c013167a>] sigprocmask+0x18a/0x280
> [<e090c549>] nfsd+0x289/0x7c0 [nfsd]
> [<e090c2c0>] nfsd+0x0/0x7c0 [nfsd]
> [<c0108201>] kernel_thread_helper+0x5/0x14
>
> Code: 0f 00 00 8b 4c 24 60 c1 e8 0c 0f b7 91 88 01 00 00 01 c2 66 89 91 88 01 00 00 8b 54 24 04 8b 42 14 85 c0 74 03 ff 40 08 8b 47 14 <8b> 53 10 8b 4b 14 89 90 94 01 00 00 89 88 98 01 00 00 31 c0 0f
OK, you have CONFIG_DEBUG_PAGEALLOC set. That's the patch which unmaps
pages from kernel virtual address space when they are freed.
That patch seems quite stable on uniprocessor at least - there are question
marks over its honesty on SMP.
I would be inclined to say that this is a hitherto undiscovered
use-after-free bug.
next prev parent reply other threads:[~2003-05-25 22:32 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-25 11:27 2.5.69-mm9 Andrew Morton
2003-05-25 12:56 ` 2.5.69-mm9 Rudmer van Dijk
2003-05-25 14:07 ` 2.5.69-mm9 Ed Sweetman
2003-05-25 20:06 ` 2.5.69-mm9 Andrew Morton
2003-05-25 20:29 ` 2.5.69-mm9 Adrian Bunk
2003-05-25 16:47 ` 2.5.69-mm9 Nicholas Wourms
2003-05-25 17:06 ` 2.5.69-mm9 Adam Kropelin
2003-05-25 20:54 ` 2.5.69-mm9: undefined references to `router_devlist' Adrian Bunk
2003-05-26 13:15 ` Arnaldo Carvalho de Melo
2003-05-27 2:34 ` [PATCH] wanrouter: fix bug introduced by latest namespace fix Arnaldo Carvalho de Melo
2003-05-27 7:08 ` David S. Miller
2003-05-25 21:56 ` 2.5.69-mm9 Felipe Alfaro Solana
2003-05-25 22:48 ` Andrew Morton [this message]
2003-05-25 23:16 ` 2.5.69-mm9 Neil Brown
2003-05-25 23:19 ` 2.5.69-mm9 Trond Myklebust
2003-05-25 15:19 2.5.69-mm9 Alistair J Strachan
2003-05-25 20:15 ` 2.5.69-mm9 Andrew Morton
2003-05-25 20:35 ` 2.5.69-mm9 Alistair J Strachan
2003-05-25 20:51 ` 2.5.69-mm9 Mike Fedyk
2003-05-25 20:55 ` 2.5.69-mm9 Andrew Morton
[not found] <20030525172746.43b9866d.akpm@digeo.com>
[not found] ` <20030529204324.GF25560@kroah.com>
2003-05-29 23:48 ` 2.5.69-mm9 Alistair J Strachan
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