syzbot


KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru (4)

Status: auto-obsoleted due to no activity on 2024/06/03 21:44
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+f0dbfecdd41310fb8735@syzkaller.appspotmail.com
First crash: 437d, last: 45d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru (3) fs 1 482d 482d 0/28 auto-obsoleted due to no activity on 2023/04/01 03:15
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru fs 14 1590d 1657d 0/28 auto-closed as invalid on 2020/04/15 20:03
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru (2) ext4 exfat 213 526d 986d 0/28 auto-obsoleted due to no activity on 2023/02/08 20:39

Sample crash report:
==================================================================
BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru

write to 0xffff888237c2b990 of 8 bytes by task 5202 on cpu 0:
 __invalidate_bh_lrus fs/buffer.c:1488 [inline]
 invalidate_bh_lru+0x8b/0xf0 fs/buffer.c:1500
 csd_do_func kernel/smp.c:133 [inline]
 smp_call_function_many_cond+0x6bd/0xc50 kernel/smp.c:846
 on_each_cpu_cond_mask+0x3c/0x90 kernel/smp.c:1023
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1519
 kill_bdev block/bdev.c:84 [inline]
 set_blocksize+0x260/0x290 block/bdev.c:161
 sb_set_blocksize+0x2d/0xb0 block/bdev.c:170
 ext4_load_super fs/ext4/super.c:5094 [inline]
 __ext4_fill_super fs/ext4/super.c:5222 [inline]
 ext4_fill_super+0xad5/0x39d0 fs/ext4/super.c:5699
 get_tree_bdev+0x253/0x2e0 fs/super.c:1614
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5731
 vfs_get_tree+0x56/0x1d0 fs/super.c:1779
 do_new_mount+0x227/0x690 fs/namespace.c:3352
 path_mount+0x49b/0xb30 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3875
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3875
 x64_sys_call+0x2591/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237c2b990 of 8 bytes by task 3096 on cpu 1:
 has_bh_in_lru+0x35/0x1f0 fs/buffer.c:1510
 smp_call_function_many_cond+0x2f6/0xc50 kernel/smp.c:808
 on_each_cpu_cond_mask+0x3c/0x90 kernel/smp.c:1023
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1519
 invalidate_bdev+0x4f/0x80 block/bdev.c:94
 ext4_put_super+0x51b/0x7e0 fs/ext4/super.c:1361
 generic_shutdown_super+0xde/0x210 fs/super.c:641
 kill_block_super+0x2a/0x70 fs/super.c:1675
 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7327
 deactivate_locked_super+0x7d/0x1c0 fs/super.c:472
 deactivate_super+0x9f/0xb0 fs/super.c:505
 cleanup_mnt+0x272/0x2e0 fs/namespace.c:1267
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1274
 task_work_run+0x13a/0x1a0 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xbe/0x130 kernel/entry/common.c:218
 do_syscall_64+0xda/0x1d0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffff888106ee23a8 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3096 Comm: syz-executor.1 Not tainted 6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
==================================================================
EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000.

Crashes (80):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/29 21:43 upstream b947cc5bf6d7 f10afd69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/04/28 01:03 upstream 5d12ed4bea43 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/04/24 22:22 upstream e88c4cfcb7b8 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/04/24 07:48 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/03/21 08:00 upstream dba89d1b81df 6753db5c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/02/27 11:51 upstream 45ec2f5f6ed3 05e69c83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/02/03 01:10 upstream 021533194476 60bf9982 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/01/26 05:08 upstream ecb1b8288dc7 cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/01/10 18:28 upstream ab27740f7665 04815ef1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/01/08 06:10 upstream 0dd3ee311255 d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/01/07 00:33 upstream 95c8a35f1c01 d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/01/04 07:13 upstream ac865f00af29 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2024/01/03 21:57 upstream 610a9b8f49fb 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/12/31 20:34 upstream 2639772a11c8 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/12/31 01:52 upstream 453f5db0619e fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/12/19 05:01 upstream 2cf4f94d8e86 924661f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/12/13 12:49 upstream 88035e5694a8 ebcad15c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/12/12 18:57 upstream 26aff849438c ebcad15c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/12/06 19:43 upstream bee0e7762ad2 e3299f55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/12/05 22:13 upstream bee0e7762ad2 858d62d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/25 23:25 upstream b46ae77f6787 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/25 02:51 upstream 0f5cc96c367f 5b429f39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/23 12:27 upstream 9b6de136b5f0 fc59b78e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/22 20:03 upstream 9b6de136b5f0 03e12510 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/21 11:26 upstream 98b1cc82c4af cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/12 12:05 upstream 1b907d050735 6d6dbf8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/11 04:52 upstream ac347a0655db d80eec66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/10 13:58 upstream 89cdf9d55601 45e9b83e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/05 07:07 upstream aea6bf908d73 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/03 16:31 upstream 8f6f76a6a29f c4ac074c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/11/02 17:29 upstream babe393974de 69904c9f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/10/31 18:21 upstream 5a6a09e97199 58499c95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/10/19 04:44 upstream dd72f9c7e512 342b9c55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/10/17 08:58 upstream 213f891525c2 342b9c55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/10/15 15:49 upstream 9a3dad63edbe f757a323 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/10/09 10:14 upstream 94f6f0550c62 5e837c76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/29 22:44 upstream 71e58659bfc0 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/29 01:54 upstream 9ed22ae6be81 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/28 12:57 upstream 633b47cb009d c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/22 04:53 upstream b5cbe7c00aa0 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/20 23:39 upstream 5d2f53532ecc 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/16 17:20 upstream 57d88e8a5974 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/07 00:37 upstream 744a759492b5 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/06 00:46 upstream 7733171926cc 0b6286dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/09/04 19:26 upstream 708283abf896 db3306a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/08/29 02:14 upstream 727dbda16b83 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/08/28 12:07 upstream 2dde18cd1d8f 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/08/25 15:09 upstream 4f9e7fabf864 03d9c195 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/08/19 19:32 upstream aa9ea98cca3a d216d8a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/08/12 11:18 upstream f8de32cc060b 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/08/07 20:18 upstream a027b2eca0b7 b1b6ae3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/08/04 19:57 upstream e6fda526d9db cdae481e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/08/01 05:09 upstream 5d0c230f1de8 2a0d0f29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/07/26 16:21 upstream 18b44bc5a672 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/07/26 00:31 upstream 0b5547c51827 6756545c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/07/25 12:12 upstream 0b5547c51827 3b91ad04 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/07/24 11:13 upstream 6eaae1980760 b03242d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/07/13 05:32 upstream eb26cbb1a754 86081196 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/07/10 05:29 upstream 06c2afb862f9 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/07/08 02:20 upstream 5133c9e51de4 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/07/02 05:40 upstream dfab92f27c60 bfc47836 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/06/24 03:53 upstream 61dabacdad4e 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/06/19 21:23 upstream 45a3e24f65e9 d521bc56 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/06/18 09:46 upstream 1b29d271614a f3921d4d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/06/03 15:31 upstream 4ecd704a4c51 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/05/24 12:37 upstream 27e462c8fad4 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/05/15 01:09 upstream bb7c241fae62 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/30 07:17 upstream 1ae78a14516b 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/23 13:23 upstream 622322f53c6d 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/22 22:44 upstream 2caeeb9d4a1b 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/18 01:36 upstream 6a8f57ae2eb0 436577a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/18 01:35 upstream 6a8f57ae2eb0 436577a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/17 18:04 upstream 6a8f57ae2eb0 c6ec7083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/15 11:06 upstream 7a934f4bd7d6 ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/12 12:52 upstream e62252bc55b6 1a1596b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/12 02:07 upstream e62252bc55b6 49faf98d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/10 09:57 upstream 09a9639e56c0 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/08 05:29 upstream aa318c48808c 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/07 20:05 upstream f2afccfefe7b f7ba566d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
2023/04/03 12:22 upstream 7e364e56293b 41147e3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru
* Struck through repros no longer work on HEAD.