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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: 195d, last: 96d
▶ ▼ Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in shrink_dentry_list / step_into (6) fs 1 252d 252d 0/28 auto-obsoleted due to no activity on 2024/03/03 06:03
upstream KCSAN: data-race in shrink_dentry_list / step_into fs 1 1075d 1075d 0/28 auto-closed as invalid on 2021/12/01 04:11
upstream KCSAN: data-race in shrink_dentry_list / step_into (5) fs 3 369d 408d 0/28 auto-obsoleted due to no activity on 2023/11/06 20:19
upstream KCSAN: data-race in shrink_dentry_list / step_into (2) fs 3 754d 780d 0/28 auto-obsoleted due to no activity on 2022/10/17 16:38
upstream KCSAN: data-race in shrink_dentry_list / step_into (3) fs 1 712d 712d 0/28 auto-obsoleted due to no activity on 2022/11/29 05:37
upstream KCSAN: data-race in shrink_dentry_list / step_into (4) fs 1 649d 649d 0/28 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.