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KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (8)

Status: auto-obsoleted due to no activity on 2024/01/04 10:47
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+3d34f041a9dc781b81cf@syzkaller.appspotmail.com
First crash: 182d, last: 182d
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (3) fs 1 595d 595d 0/26 auto-obsoleted due to no activity on 2022/11/16 21:51
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (5) fs 2 401d 412d 0/26 auto-obsoleted due to no activity on 2023/05/30 05:48
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (7) ext4 3 227d 254d 0/26 auto-obsoleted due to no activity on 2023/11/20 11:49
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (9) fs 1 131d 131d 0/26 auto-obsoleted due to no activity on 2024/02/23 17:16
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (6) ext4 1 291d 291d 0/26 auto-obsoleted due to no activity on 2023/09/17 01:43
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (10) fs 1 47d 47d 0/26 auto-obsoleted due to no activity on 2024/05/17 23:40
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (2) fs 14 640d 846d 0/26 auto-closed as invalid on 2022/10/03 06:12
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu ext4 137 919d 1077d 0/26 auto-closed as invalid on 2021/12/28 13:59
upstream KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (4) ext4 3 506d 557d 0/26 auto-obsoleted due to no activity on 2023/03/11 22:09

Sample crash report:
EXT4-fs: Ignoring removed bh option
==================================================================
BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu

write to 0xffff888237c2a448 of 8 bytes by task 28864 on cpu 0:
 __invalidate_bh_lrus fs/buffer.c:1488 [inline]
 invalidate_bh_lrus_cpu+0x82/0xb0 fs/buffer.c:1533
 lru_add_and_bh_lrus_drain mm/swap.c:768 [inline]
 lru_add_drain_per_cpu+0x70/0x90 mm/swap.c:787
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703
 worker_thread+0x525/0x730 kernel/workqueue.c:2784
 kthread+0x1d7/0x210 kernel/kthread.c:388
 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

read to 0xffff888237c2a448 of 8 bytes by task 18477 on cpu 1:
 has_bh_in_lru+0x35/0x1e0 fs/buffer.c:1510
 smp_call_function_many_cond+0x2e4/0xc20 kernel/smp.c:808
 on_each_cpu_cond_mask+0x3c/0x80 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:75 [inline]
 set_blocksize+0x260/0x290 block/bdev.c:152
 sb_set_blocksize+0x2d/0xb0 block/bdev.c:161
 ext4_load_super fs/ext4/super.c:5108 [inline]
 __ext4_fill_super fs/ext4/super.c:5236 [inline]
 ext4_fill_super+0xad5/0x39a0 fs/ext4/super.c:5712
 get_tree_bdev+0x272/0x300 fs/super.c:1598
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5744
 vfs_get_tree+0x51/0x1b0 fs/super.c:1771
 do_new_mount+0x203/0x660 fs/namespace.c:3337
 path_mount+0x496/0xb30 fs/namespace.c:3664
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3863
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3863
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0xffff88814bf03dd0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 18477 Comm: syz-executor.1 Not tainted 6.7.0-rc3-syzkaller-00033-g3b47bc037bd4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
==================================================================
EXT4-fs (loop1): can't mount with data=, fs mounted w/o journal

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/11/30 10:47 upstream 3b47bc037bd4 f819d6f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu
* Struck through repros no longer work on HEAD.