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
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