syzbot


KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu (5)

Status: auto-obsoleted due to no activity on 2023/05/30 05:48
Subsystems: fs
[Documentation on labels]
First crash: 412d, last: 401d
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 (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 (8) ext4 1 182d 170d 0/26 auto-obsoleted due to no activity on 2024/01/04 10:47
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:
==================================================================
BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu

write to 0xffff888237c2a378 of 8 bytes by task 3161 on cpu 0:
 __invalidate_bh_lrus fs/buffer.c:1424 [inline]
 invalidate_bh_lrus_cpu+0x82/0xb0 fs/buffer.c:1469
 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+0x3e6/0x750 kernel/workqueue.c:2390
 process_scheduled_works kernel/workqueue.c:2453 [inline]
 worker_thread+0x763/0xa10 kernel/workqueue.c:2542
 kthread+0x1a6/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888237c2a378 of 8 bytes by task 19182 on cpu 1:
 has_bh_in_lru+0x35/0x1e0 fs/buffer.c:1446
 smp_call_function_many_cond+0x2dd/0x6f0 kernel/smp.c:935
 on_each_cpu_cond_mask+0x3c/0x80 kernel/smp.c:1155
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1455
 invalidate_bdev+0x55/0x80 block/bdev.c:85
 invalidate_disk+0x29/0xc0 block/genhd.c:718
 __loop_clr_fd+0x163/0x3b0 drivers/block/loop.c:1164
 loop_clr_fd drivers/block/loop.c:1257 [inline]
 lo_ioctl+0xe9e/0x12f0 drivers/block/loop.c:1563
 blkdev_ioctl+0x3a0/0x490 block/ioctl.c:615
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xc9/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x0000000000000000 -> 0xffff88810a59c5b0

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19182 Comm: syz-executor.5 Not tainted 6.3.0-syzkaller-00113-g1a0beef98b58 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
==================================================================

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/04/25 05:45 upstream 1a0beef98b58 65320f8e .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
2023/04/13 17:55 upstream de4664485abb 3cfcaa1b .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.