On Mon, Jan 04, 2016 at 07:47:58AM +1100, Dave Chinner wrote: > > Maybe, in the meanwhile, you can do something with my files. You can find > > 'em here: > > http://mail.gelma.net/xfs_kasan > > Any update on this problem, Andrea?
Hi Dave,
and thanks a lot for your interest.
So, to make long story short.
Recompiled kernel with debug info and all the rest.
Run it.
Then started a flood of this kind:
Dec 15 12:12:24 glen kernel: [ 5326.351571] BUG: KASAN: use-after-free in
__check_element+0x1e0/0x200 at addr ffff88004a201ff5
Dec 15 12:12:24 glen kernel: [ 5326.351574] Read of size 1 by task
kworker/u8:2/10221
Dec 15 12:12:24 glen kernel: [ 5326.351578] page:ffffea0001288040 count:1
mapcount:0 mapping: (null) index:0x0
Dec 15 12:12:24 glen kernel: [ 5326.351580] flags: 0x4000000000000000()
Dec 15 12:12:24 glen kernel: [ 5326.351583] page dumped because: kasan: bad
access detected
Dec 15 12:12:24 glen kernel: [ 5326.351587] CPU: 1 PID: 10221 Comm:
kworker/u8:2 Tainted: G B 4.4.0-rc5KASan #1
Dec 15 12:12:24 glen kernel: [ 5326.351590] Hardware name: LENOVO
2356LRG/2356LRG, BIOS G7ETA4WW (2.64 ) 10/08/2015
Dec 15 12:12:24 glen kernel: [ 5326.351594] Workqueue: kcryptd kcryptd_crypt
Dec 15 12:12:24 glen kernel: [ 5326.351596] ffff88004a201ff5 ffff8801086bfa10
ffffffff819d2e3a 00000000ffffff6b
Dec 15 12:12:24 glen kernel: [ 5326.351601] ffff8801086bfa98 ffffffff813f4b61
0000000000000010 dffffc0000000000
Dec 15 12:12:24 glen kernel: [ 5326.351606] 0000000000000046 ffffed00094403fe
00000000813f42cd 0000000000000000
Dec 15 12:12:24 glen kernel: [ 5326.351610] Call Trace:
Dec 15 12:12:24 glen kernel: [ 5326.351614] [<ffffffff819d2e3a>]
dump_stack+0x4e/0x84
Dec 15 12:12:24 glen kernel: [ 5326.351619] [<ffffffff813f4b61>]
kasan_report_error+0x511/0x540
Dec 15 12:12:24 glen kernel: [ 5326.351623] [<ffffffff813f4bce>]
__asan_report_load1_noabort+0x3e/0x40
Dec 15 12:12:24 glen kernel: [ 5326.351628] [<ffffffff8132e600>] ?
__check_element+0x1e0/0x200
Dec 15 12:12:24 glen kernel: [ 5326.351632] [<ffffffff8132e600>]
__check_element+0x1e0/0x200
Dec 15 12:12:24 glen kernel: [ 5326.351636] [<ffffffff8132e8b6>]
remove_element+0x206/0x430
Dec 15 12:12:24 glen kernel: [ 5326.351640] [<ffffffff8132ec35>]
mempool_alloc+0x155/0x2a0
Dec 15 12:12:24 glen kernel: [ 5326.351644] [<ffffffff813f40c8>] ?
memset+0x28/0x30
Dec 15 12:12:24 glen kernel: [ 5326.351648] [<ffffffff8132eae0>] ?
remove_element+0x430/0x430
Dec 15 12:12:24 glen kernel: [ 5326.351652] [<ffffffff81927cb0>] ?
bvec_alloc+0x250/0x250
Dec 15 12:12:24 glen kernel: [ 5326.351656] [<ffffffff8103af40>] ?
set_tsc_mode+0x60/0x60
Dec 15 12:12:24 glen kernel: [ 5326.351661] [<ffffffff8206075d>]
kcryptd_crypt+0x5dd/0xea0
Dec 15 12:12:24 glen kernel: [ 5326.351667] [<ffffffff8114728a>]
process_one_work+0x48a/0x1160
Dec 15 12:12:24 glen kernel: [ 5326.351671] [<ffffffff81148034>]
worker_thread+0xd4/0x1170
Dec 15 12:12:24 glen kernel: [ 5326.351676] [<ffffffff81147f60>] ?
process_one_work+0x1160/0x1160
Dec 15 12:12:24 glen kernel: [ 5326.351681] [<ffffffff81157d70>]
kthread+0x1c0/0x260
Dec 15 12:12:24 glen kernel: [ 5326.351686] [<ffffffff81157bb0>] ?
kthread_worker_fn+0x560/0x560
Dec 15 12:12:24 glen kernel: [ 5326.351691] [<ffffffff81157bb0>] ?
kthread_worker_fn+0x560/0x560
Dec 15 12:12:24 glen kernel: [ 5326.351696] [<ffffffff824daf8f>]
ret_from_fork+0x3f/0x70
Dec 15 12:12:24 glen kernel: [ 5326.351700] [<ffffffff81157bb0>] ?
kthread_worker_fn+0x560/0x560
Dec 15 12:12:24 glen kernel: [ 5326.351703] Memory state around the buggy
address:
Dec 15 12:12:24 glen kernel: [ 5326.351707] ffff88004a201e80: ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff
Dec 15 12:12:24 glen kernel: [ 5326.351711] ffff88004a201f00: ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff
Dec 15 12:12:24 glen kernel: [ 5326.351715] >ffff88004a201f80: ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff
Dec 15 12:12:24 glen kernel: [ 5326.351717]
^
Dec 15 12:12:24 glen kernel: [ 5326.351721] ffff88004a202000: 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
Dec 15 12:12:24 glen kernel: [ 5326.351725] ffff88004a202080: 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00
Dec 15 12:12:24 glen kernel: [ 5326.351727]
==================================================================
Dec 15 12:12:24 glen kernel: [ 5326.351730]
==================================================================
Everytime it happened (usually when writing) I had a little stall of the
system. After a few hours it was
impossible to work this way, so I got back to an Ubuntu vanilla kernel. (I
guess it's related to my luks
partition).
Anyway, now I compile rc8 and try it again.
In attachment you can find my .config.
If you please can give it a look and tell me if it's good for you, about
info you could need after.
Thanks again,
Andrea
config.gz
Description: application/gzip
signature.asc
Description: Digital signature
