Christoph Lameter napisał(a):
> On Wed, 23 May 2007, Michal Piotrowski wrote:
>
>> Christoph, this looks like a bug in SLUB.
>
> Please boot with slub_debug to find the bad code that overwrites a slab
> object after it was freed.
>
>
[ 19.096577] Real Time Clock Driver v1.12ac
[ 21.650315] *** SLUB kmalloc-8: Redzone Active@0xc90f6d20 slab 0xc528c530
[ 21.657365] offset=3360 flags=0x400000c3 inuse=61 freelist=0xc90f6d58
[ 21.664349] Bytes b4 0xc90f6d10: 00 00 00 00 00 00 00 00 5a 5a 5a 5a 5a 5a 5a 5a ........ZZZZZZZZ
[ 21.674305] Object 0xc90f6d20: 31 30 31 39 2e 30 30 35 1019.005
[ 21.684259] Redzone 0xc90f6d28: 00 cc cc cc .ллл
[ 21.694265] FreePointer 0xc90f6d2c -> 0xc90f6d58
[ 21.699061] Last alloc: get_modalias+0x61/0xf5 jiffies_ago=53 cpu=1 pid=554
[ 21.706362] Filler 0xc90f6d50: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ
[ 21.716364] [<c010523d>] dump_trace+0x63/0x1eb
[ 21.721117] [<c01053df>] show_trace_log_lvl+0x1a/0x2f
[ 21.726466] [<c010601d>] show_trace+0x12/0x14
[ 21.731096] [<c0106035>] dump_stack+0x16/0x18
[ 21.735790] [<c017e0fa>] object_err+0x143/0x14b
[ 21.740575] [<c017e2cc>] check_object+0x66/0x234
[ 21.745582] [<c017eb43>] __slab_free+0x239/0x384
[ 21.750503] [<c017f446>] kfree+0xa6/0xc6
[ 21.754706] [<c02e2335>] get_modalias+0xb9/0xf5
[ 21.759517] [<c02e23b7>] dmi_dev_uevent+0x27/0x3c
[ 21.764537] [<c027866a>] dev_uevent+0x1ad/0x1da
[ 21.769429] [<c0205024>] kobject_uevent_env+0x20a/0x45b
[ 21.774970] [<c020527f>] kobject_uevent+0xa/0xf
[ 21.779834] [<c02779f1>] store_uevent+0x4f/0x58
[ 21.784678] [<c027758e>] dev_attr_store+0x29/0x2f
[ 21.789688] [<c01bec4f>] sysfs_write_file+0x16e/0x19c
[ 21.795022] [<c0183ba7>] vfs_write+0xd1/0x15a
[ 21.799673] [<c01841d7>] sys_write+0x3d/0x72
[ 21.804284] [<c0104112>] sysenter_past_esp+0x5f/0x99
[ 21.809606] [<b7f7b410>] 0xb7f7b410
[ 21.813379] =======================
[ 21.817083] @@@ SLUB kmalloc-8: Restoring redzone (0xcc) from 0xc90f6d28-0xc90f6d2b
Here is another one
[ 0.182216] PM: Adding info for No Bus:id
[ 0.182333] *** SLUB kmalloc-8: Redzone Active@0xc7838188 slab 0xc521cfc0
[ 0.182395] offset=392 flags=0x400000c3 inuse=8 freelist=0xc78381c0
[ 0.182455] Bytes b4 0xc7838178: 00 00 00 00 00 00 00 00 5a 5a 5a 5a 5a 5a 5a 5a ........ZZZZZZZZ
[ 0.183299] Object 0xc7838188: 31 30 31 39 2e 30 30 35 1019.005
[ 0.184141] Redzone 0xc7838190: 00 cc cc cc .ллл
[ 0.184980] FreePointer 0xc7838194 -> 0xc78381c0
[ 0.185038] Last alloc: get_modalias+0x61/0xf5 jiffies_ago=0 cpu=0 pid=1
[ 0.185196] Filler 0xc78381b8: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ
[ 0.186043] [<c010523d>] dump_trace+0x63/0x1eb
[ 0.186155] [<c01053df>] show_trace_log_lvl+0x1a/0x2f
[ 0.186262] [<c010601d>] show_trace+0x12/0x14
[ 0.186368] [<c0106035>] dump_stack+0x16/0x18
[ 0.187567] [<c017e0fa>] object_err+0x143/0x14b
[ 0.187677] [<c017e2cc>] check_object+0x66/0x234
[ 0.187788] [<c017eb43>] __slab_free+0x239/0x384
[ 0.187895] [<c017f446>] kfree+0xa6/0xc6
[ 0.188001] [<c02e2335>] get_modalias+0xb9/0xf5
[ 0.188111] [<c02e23b7>] dmi_dev_uevent+0x27/0x3c
[ 0.188219] [<c027866a>] dev_uevent+0x1ad/0x1da
[ 0.188328] [<c0205024>] kobject_uevent_env+0x20a/0x45b
[ 0.188438] [<c020527f>] kobject_uevent+0xa/0xf
[ 0.188544] [<c02782bd>] device_add+0x274/0x45f
[ 0.188650] [<c02784ba>] device_register+0x12/0x15
[ 0.188761] [<c0504d25>] dmi_id_init+0x256/0x26c
[ 0.188869] [<c04ec505>] kernel_init+0x14e/0x2bf
[ 0.188976] [<c0104e0b>] kernel_thread_helper+0x7/0x10
[ 0.189083] =======================
[ 0.189143] @@@ SLUB kmalloc-8: Restoring redzone (0xcc) from 0xc7838190-0xc7838193
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.22-rc2-mm1/mm-dmesg
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.22-rc2-mm1/mm-config
Regards,
Michal
--
Michal K. K. Piotrowski
Kernel Monkeys
(http://kernel.wikidot.com/start)
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