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Message-ID: <20090115181612.GA27762@elte.hu>
Date: Thu, 15 Jan 2009 19:16:12 +0100
From: Ingo Molnar <mingo@...e.hu>
To: linux-kernel@...r.kernel.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
"Rafael J. Wysocki" <rjw@...k.pl>,
Pekka Enberg <penberg@...helsinki.fi>,
David Howells <dhowells@...hat.com>,
Michael LeMay <mdlemay@...ch.ncsc.mil>,
James Morris <jmorris@...ei.org>,
Stephen Smalley <sds@...ho.nsa.gov>,
Paul Moore <paul.moore@...com>, Eric Paris <eparis@...hat.com>
Subject: [slab corruption] BUG key_jar: Poison overwritten
-tip testing found the rather scary looking slab corruption:
[ 35.419875] CPU0 attaching sched-domain:
[ 35.420101] domain 0: span 0-1 level CPU
[ 35.425883] groups: 0 1
[ 35.428527] CPU1 attaching sched-domain:
[ 35.432010] domain 0: span 0-1 level CPU
[ 35.437729] groups: 1 0
[ 37.380005] eth0: no IPv6 routers present
[ 44.478286] =============================================================================
[ 44.482064] BUG key_jar: Poison overwritten
[ 44.482064] -----------------------------------------------------------------------------
[ 44.482064]
[ 44.482064] INFO: 0xf5f320c0-0xf5f320c0. First byte 0x6a instead of 0x6b
[ 44.482064] INFO: Allocated in key_alloc+0xe7/0x30e age=291 cpu=1 pid=2815
[ 44.482064] INFO: Freed in key_cleanup+0xd8/0xdd age=292 cpu=1 pid=2520
[ 44.482064] INFO: Slab 0xc1f9cfb8 objects=21 used=2 fp=0xf5f320c0 flags=0x400000c3
[ 44.482064] INFO: Object 0xf5f320c0 @offset=192 fp=0xf5f32240
[ 44.482064]
[ 44.482064] Bytes b4 0xf5f320b0: 7c 05 ff ff 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a |.��ZZZZZZZZZZZZ
[ 44.482064] Object 0xf5f320c0: 6a 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b jkkkkkkkkkkkkkkk
[ 44.482064] Object 0xf5f320d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
[ 44.482064] Object 0xf5f320e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
[ 44.482064] Object 0xf5f320f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
[ 44.482064] Object 0xf5f32100: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
[ 44.482064] Object 0xf5f32110: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
[ 44.482064] Object 0xf5f32120: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
[ 44.482064] Object 0xf5f32130: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
[ 44.482064] Object 0xf5f32140: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkk�
[ 44.482064] Redzone 0xf5f3214c: bb bb bb bb ����
[ 44.482064] Padding 0xf5f32174: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZ
[ 44.482064] Pid: 2832, comm: sudo Not tainted 2.6.29-rc1-tip-01097-gf5d0b1b-dirty #16445
[ 44.482064] Call Trace:
[ 44.482064] [<c018e25c>] print_trailer+0xcd/0xd5
[ 44.482064] [<c018e2dc>] check_bytes_and_report+0x78/0x94
[ 44.482064] [<c018e55c>] check_object+0xa9/0x191
[ 44.482064] [<c018eff3>] __slab_alloc+0x365/0x42c
[ 44.482064] [<c0144dda>] ? trace_hardirqs_off+0xb/0xd
[ 44.482064] [<c018f369>] kmem_cache_alloc+0x64/0xc1
[ 44.482064] [<c02d040e>] ? key_alloc+0xe7/0x30e
[ 44.482064] [<c02d040e>] ? key_alloc+0xe7/0x30e
[ 44.482064] [<c02d040e>] key_alloc+0xe7/0x30e
[ 44.482064] [<c02d1429>] keyring_alloc+0x24/0x58
[ 44.482064] [<c02d2781>] install_session_keyring_to_cred+0x43/0x92
[ 44.482064] [<c02d2d61>] lookup_user_key+0xe0/0x30b
[ 44.482064] [<c02d17ab>] keyctl_get_keyring_ID+0x12/0x2e
[ 44.482064] [<c02d22c2>] sys_keyctl+0x36/0xe3
[ 44.482064] [<c0102d55>] sysenter_do_call+0x12/0x35
[ 44.482064] FIX key_jar: Restoring 0xf5f320c0-0xf5f320c0=0x6b
[ 44.482064]
[ 44.482064] FIX key_jar: Marking all objects used
Config attached. The system seemed to stay intact after this incident.
Ingo
View attachment "config" of type "text/plain" (68746 bytes)
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