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From: Victor Westerhuis <victor@westerhu.is>
To: linux-bcache@vger.kernel.org
Subject: Kernel Oops: kernel BUG at block/bio.c:52
Date: Tue, 20 Apr 2021 16:54:13 +0200	[thread overview]
Message-ID: <f8a8d65a-8579-eccb-ddf1-33a2196ea83b@westerhu.is> (raw)

Hi all!

Today I tried using bcache for the first time, but after a few minutes
all accesses to my new bcache filesystem started hanging.

Looking in dmesg I found the following Oops:
[  533.649096] kernel BUG at block/bio.c:52!
[  533.649107] invalid opcode: 0000 [#1] SMP PTI
[  533.649111] CPU: 3 PID: 1161 Comm: transmission-qt Not tainted 
5.12.0-rc8-personal #1
[  533.649115] Hardware name: LENOVO 20354/Lancer 5A5, BIOS 9BCN91WW 
07/21/2015
[  533.649117] RIP: 0010:biovec_slab.part.0+0x5/0x10
[  533.649128] Code: 82 00 48 8b 7b f0 48 85 ff 74 e1 48 8b 07 48 89 43 
f0 48 85 c0 75 ce 48 c7 43 f8 00 00 00 00 eb c4 5b 5d c3 90 0f 1f 44 00 
00 <0f> 0b 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 83 7f 40 00 75
[  533.649132] RSP: 0018:ffffbc0cc3337950 EFLAGS: 00010206
[  533.649136] RAX: 000000000000017f RBX: ffffbc0cc3337984 RCX: 
0000000000000100
[  533.649139] RDX: 0000000000000800 RSI: ffffbc0cc3337984 RDI: 
ffffa015d5300118
[  533.649141] RBP: 0000000000000800 R08: ffffa015d5300118 R09: 
ffffa015222d8d00
[  533.649143] R10: ffffa015d47d38f0 R11: 9000000002800000 R12: 
ffffa015d5300118
[  533.649145] R13: 0000000000000800 R14: ffffa015d53000d0 R15: 
0000000000000800
[  533.649148] FS:  00007f68dab79700(0000) GS:ffffa01707380000(0000) 
knlGS:0000000000000000
[  533.649151] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  533.649153] CR2: 00007f84340df020 CR3: 0000000145538006 CR4: 
00000000001706e0
[  533.649155] Call Trace:
[  533.649158]  bvec_alloc+0x90/0xc0
[  533.649166]  bio_alloc_bioset+0x130/0x1d0
[  533.649172]  cached_dev_cache_miss+0x100/0x300 [bcache]
[  533.649202]  cache_lookup_fn+0x119/0x300 [bcache]
[  533.649222]  ? bch_btree_iter_next_filter+0x1b0/0x2c0 [bcache]
[  533.649239]  ? bch_data_invalidate+0x160/0x160 [bcache]
[  533.649258]  bch_btree_map_keys_recurse+0x7e/0x180 [bcache]
[  533.649277]  ? mempool_alloc+0x62/0x170
[  533.649283]  bch_btree_map_keys+0x15c/0x1b0 [bcache]
[  533.649301]  ? bch_data_invalidate+0x160/0x160 [bcache]
[  533.649321]  cache_lookup+0x8a/0x140 [bcache]
[  533.649340]  cached_dev_submit_bio+0x964/0xc90 [bcache]
[  533.649361]  ? submit_bio_checks+0x1a2/0x570
[  533.649366]  ? mempool_alloc+0x62/0x170
[  533.649371]  submit_bio_noacct+0x122/0x4f0
[  533.649376]  ext4_mpage_readpages+0x1e0/0x8d0 [ext4]
[  533.649420]  ? __mod_memcg_lruvec_state+0x22/0xe0
[  533.649424]  ? __add_to_page_cache_locked+0x18f/0x370
[  533.649429]  read_pages+0x82/0x1e0
[  533.649433]  page_cache_ra_unbounded+0x197/0x1e0
[  533.649438]  force_page_cache_ra+0xda/0x140
[  533.649442]  generic_fadvise+0x190/0x280
[  533.649448]  __x64_sys_fadvise64+0x7c/0x90
[  533.649453]  do_syscall_64+0x33/0x40
[  533.649458]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  533.649463] RIP: 0033:0x7f68eeab954a
[  533.649467] Code: ff eb 80 0f 1f 44 00 00 48 8b 15 41 a9 0c 00 f7 d8 
64 89 02 b8 ff ff ff ff eb c3 e8 e0 a0 01 00 41 89 ca b8 dd 00 00 00 0f 
05 <89> c2 f7 da 3d 00 f0 ff ff b8 00 00 00 00 0f 47 c2 c3 0f 1f 40 00
[  533.649470] RSP: 002b:00007f68dab787f8 EFLAGS: 00000246 ORIG_RAX: 
00000000000000dd
[  533.649474] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 
00007f68eeab954a
[  533.649477] RDX: 0000000000800000 RSI: 0000000038ff17a8 RDI: 
0000000000000028
[  533.649479] RBP: 0000000000000000 R08: 0000000000000003 R09: 
0000000000000003
[  533.649481] R10: 0000000000000003 R11: 0000000000000246 R12: 
0000000000000001
[  533.649483] R13: 0000000000000001 R14: 00007f68c434aaf8 R15: 
00007f68c42dd950
[  533.649488] Modules linked in: des_generic libdes sha1_ssse3 
sha1_generic md5 md4 bcache crc64 hid_generic usbhid ext4 crc32c_generic 
mbcache jbd2 pkcs8_key_parser fuse
[  533.649506] ---[ end trace 4d34ff6f2d05924c ]---
[  533.649509] RIP: 0010:biovec_slab.part.0+0x5/0x10
[  533.649515] Code: 82 00 48 8b 7b f0 48 85 ff 74 e1 48 8b 07 48 89 43 
f0 48 85 c0 75 ce 48 c7 43 f8 00 00 00 00 eb c4 5b 5d c3 90 0f 1f 44 00 
00 <0f> 0b 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 83 7f 40 00 75
[  533.649518] RSP: 0018:ffffbc0cc3337950 EFLAGS: 00010206
[  533.649522] RAX: 000000000000017f RBX: ffffbc0cc3337984 RCX: 
0000000000000100
[  533.649524] RDX: 0000000000000800 RSI: ffffbc0cc3337984 RDI: 
ffffa015d5300118
[  533.649526] RBP: 0000000000000800 R08: ffffa015d5300118 R09: 
ffffa015222d8d00
[  533.649528] R10: ffffa015d47d38f0 R11: 9000000002800000 R12: 
ffffa015d5300118
[  533.649531] R13: 0000000000000800 R14: ffffa015d53000d0 R15: 
0000000000000800
[  533.649533] FS:  00007f68dab79700(0000) GS:ffffa01707380000(0000) 
knlGS:0000000000000000
[  533.649536] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  533.649539] CR2: 00007f84340df020 CR3: 0000000145538006 CR4: 
00000000001706e0

I've traced the error back to  drivers/md/bcache/request.c:919, but I
don't know the code well enough to trace it any further. It appears to
me that bcache tries to allocate an invalid amount of memory, but like
I said, I'm not sure what is going on exactly.

The problem hasn't appeared yet when running 5.11.15.

Regards,


Victor Westerhuis

             reply	other threads:[~2021-04-20 15:35 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-20 14:54 Victor Westerhuis [this message]
2021-04-20 16:14 ` Coly Li
2021-04-27 18:57   ` Marco Rebhan
2021-05-06  2:50     ` Coly Li
2021-05-06  7:36       ` Marco Rebhan
2021-05-06 10:04         ` Coly Li
2021-05-06 15:46           ` Marco Rebhan

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