KCSAN: data-race in shrink_dentry_list / step_into (7)

Status: auto-obsoleted due to no activity on 2024/08/06 04:07
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+fc3368134afd31deb75f@syzkaller.appspotmail.com
First crash: 870d, last: 770d
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in shrink_dentry_list / step_into (6) fs 6 1 926d 926d 0/29 auto-obsoleted due to no activity on 2024/03/03 06:03
upstream KCSAN: data-race in shrink_dentry_list / step_into fs 6 1 1749d 1749d 0/29 auto-closed as invalid on 2021/12/01 04:11
upstream KCSAN: data-race in shrink_dentry_list / step_into (5) fs 6 3 1044d 1083d 0/29 auto-obsoleted due to no activity on 2023/11/06 20:19
upstream KCSAN: data-race in shrink_dentry_list / step_into (2) fs 6 3 1429d 1454d 0/29 auto-obsoleted due to no activity on 2022/10/17 16:38
upstream KCSAN: data-race in shrink_dentry_list / step_into (3) fs 6 1 1386d 1386d 0/29 auto-obsoleted due to no activity on 2022/11/29 05:37
upstream KCSAN: data-race in shrink_dentry_list / step_into (4) fs 6 1 1324d 1324d 0/29 auto-obsoleted due to no activity on 2023/02/06 16:11

Sample crash report:
==================================================================
BUG: KCSAN: data-race in shrink_dentry_list / step_into

read-write to 0xffff8881006e3180 of 4 bytes by task 3866 on cpu 0:
 d_shrink_del fs/dcache.c:449 [inline]
 shrink_dentry_list+0x19f/0x3e0 fs/dcache.c:1074
 shrink_dcache_sb+0x154/0x280 fs/dcache.c:1195
 reconfigure_super+0x4c1/0x5b0 fs/super.c:1050

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/02 04:07 upstream 9903efbddba0 b294e901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shrink_dentry_list / step_into
2024/06/01 02:01 upstream d8ec19857b09 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shrink_dentry_list / step_into
2024/04/28 08:36 upstream 2c8159388952 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shrink_dentry_list / step_into
2024/03/24 15:54 upstream 70293240c5ce 0ea90952 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in shrink_dentry_list / step_into
* Struck through repros no longer work on HEAD.