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KCSAN: data-race in tomoyo_supervisor / tomoyo_supervisor

Status: closed as invalid on 2019/10/15 15:50
Subsystems: tomoyo
[Documentation on labels]
First crash: 1665d, last: 1654d
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in tomoyo_supervisor / tomoyo_supervisor (4) tomoyo 24 1255d 1235d 0/26 auto-closed as invalid on 2020/12/23 02:19
upstream KCSAN: data-race in tomoyo_supervisor / tomoyo_supervisor (3) tomoyo 142 1533d 1585d 15/26 fixed on 2020/02/18 14:31
upstream KCSAN: data-race in tomoyo_supervisor / tomoyo_supervisor (2) tomoyo 88 1619d 1654d 0/26 closed as invalid on 2019/11/19 14:04

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

write to 0xffffffff860bff44 of 4 bytes by task 3903 on cpu 0:
 tomoyo_update_stat security/tomoyo/common.c:2340 [inline]
 tomoyo_supervisor+0x1c9/0xd20 security/tomoyo/common.c:2077
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x121/0x160 security/tomoyo/file.c:573
 tomoyo_check_open_permission+0x2b9/0x320 security/tomoyo/file.c:780
 tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline]
 tomoyo_file_open+0x75/0x90 security/tomoyo/tomoyo.c:314
 security_file_open+0x69/0x210 security/security.c:1457
 do_dentry_open+0x20a/0x900 fs/open.c:784
 vfs_open+0x62/0x80 fs/open.c:906
 do_last fs/namei.c:3416 [inline]
 path_openat+0xf75/0x3530 fs/namei.c:3533
 do_filp_open+0x11e/0x1b0 fs/namei.c:3563
 do_sys_open+0x3b3/0x4f0 fs/open.c:1089
 __do_sys_open fs/open.c:1107 [inline]
 __se_sys_open fs/open.c:1102 [inline]
 __x64_sys_open+0x55/0x70 fs/open.c:1102
 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffffff860bff44 of 4 bytes by task 7214 on cpu 1:
 tomoyo_update_stat security/tomoyo/common.c:2340 [inline]
 tomoyo_supervisor+0x1b0/0xd20 security/tomoyo/common.c:2077
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x121/0x160 security/tomoyo/file.c:573
 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838
 tomoyo_inode_getattr+0x26/0x40 security/tomoyo/tomoyo.c:129
 security_inode_getattr+0x9b/0xd0 security/security.c:1182
 vfs_getattr+0x2e/0x70 fs/stat.c:115
 vfs_statx_fd+0x7a/0xd0 fs/stat.c:145
 vfs_fstat include/linux/fs.h:3204 [inline]
 __do_sys_newfstat+0x49/0xa0 fs/stat.c:378
 __se_sys_newfstat fs/stat.c:375 [inline]
 __x64_sys_newfstat+0x3a/0x50 fs/stat.c:375
 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7214 Comm: udevd Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (44):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/10/15 12:14 https://github.com/google/ktsan.git kcsan 81f95ec7998e b5268b89 .config console log report ci2-upstream-kcsan-gce
2019/10/15 09:30 https://github.com/google/ktsan.git kcsan 81f95ec7998e 05ad7292 .config console log report ci2-upstream-kcsan-gce
2019/10/14 22:38 https://github.com/google/ktsan.git kcsan d724f94f63de 05ad7292 .config console log report ci2-upstream-kcsan-gce
2019/10/14 21:49 https://github.com/google/ktsan.git kcsan d724f94f63de 05ad7292 .config console log report ci2-upstream-kcsan-gce
2019/10/14 21:36 https://github.com/google/ktsan.git kcsan d724f94f63de 05ad7292 .config console log report ci2-upstream-kcsan-gce
2019/10/14 09:36 https://github.com/google/ktsan.git kcsan d724f94f63de a6aef847 .config console log report ci2-upstream-kcsan-gce
2019/10/14 09:32 https://github.com/google/ktsan.git kcsan d724f94f63de a6aef847 .config console log report ci2-upstream-kcsan-gce
2019/10/14 01:57 https://github.com/google/ktsan.git kcsan d724f94f63de 2f661ec4 .config console log report ci2-upstream-kcsan-gce
2019/10/13 21:21 https://github.com/google/ktsan.git kcsan d724f94f63de 2f661ec4 .config console log report ci2-upstream-kcsan-gce
2019/10/13 10:39 https://github.com/google/ktsan.git kcsan d724f94f63de 2f661ec4 .config console log report ci2-upstream-kcsan-gce
2019/10/11 16:05 https://github.com/google/ktsan.git kcsan d724f94f63de 426631dd .config console log report ci2-upstream-kcsan-gce
2019/10/11 15:44 https://github.com/google/ktsan.git kcsan d724f94f63de 426631dd .config console log report ci2-upstream-kcsan-gce
2019/10/11 11:43 https://github.com/google/ktsan.git kcsan d724f94f63de 1a3bad90 .config console log report ci2-upstream-kcsan-gce
2019/10/11 02:49 https://github.com/google/ktsan.git kcsan d724f94f63de 1a3bad90 .config console log report ci2-upstream-kcsan-gce
2019/10/11 00:26 https://github.com/google/ktsan.git kcsan d724f94f63de 1a3bad90 .config console log report ci2-upstream-kcsan-gce
2019/10/10 23:03 https://github.com/google/ktsan.git kcsan d724f94f63de 1a3bad90 .config console log report ci2-upstream-kcsan-gce
2019/10/10 22:42 https://github.com/google/ktsan.git kcsan d724f94f63de 1a3bad90 .config console log report ci2-upstream-kcsan-gce
2019/10/10 21:29 https://github.com/google/ktsan.git kcsan d724f94f63de 1a3bad90 .config console log report ci2-upstream-kcsan-gce
2019/10/10 21:02 https://github.com/google/ktsan.git kcsan d724f94f63de 1a3bad90 .config console log report ci2-upstream-kcsan-gce
2019/10/10 11:26 https://github.com/google/ktsan.git kcsan d724f94f63de d52eff28 .config console log report ci2-upstream-kcsan-gce
2019/10/10 08:55 https://github.com/google/ktsan.git kcsan d724f94f63de d52eff28 .config console log report ci2-upstream-kcsan-gce
2019/10/10 08:51 https://github.com/google/ktsan.git kcsan d724f94f63de d52eff28 .config console log report ci2-upstream-kcsan-gce
2019/10/09 19:25 https://github.com/google/ktsan.git kcsan d724f94f63de c4b9981b .config console log report ci2-upstream-kcsan-gce
2019/10/09 13:04 https://github.com/google/ktsan.git kcsan d724f94f63de 312c6a5a .config console log report ci2-upstream-kcsan-gce
2019/10/09 08:21 https://github.com/google/ktsan.git kcsan d724f94f63de 312c6a5a .config console log report ci2-upstream-kcsan-gce
2019/10/08 22:54 https://github.com/google/ktsan.git kcsan d724f94f63de b1ebbfef .config console log report ci2-upstream-kcsan-gce
2019/10/08 18:15 https://github.com/google/ktsan.git kcsan d724f94f63de b1ebbfef .config console log report ci2-upstream-kcsan-gce
2019/10/08 17:58 https://github.com/google/ktsan.git kcsan d724f94f63de b1ebbfef .config console log report ci2-upstream-kcsan-gce
2019/10/08 15:36 https://github.com/google/ktsan.git kcsan 3675607974a2 137e37ca .config console log report ci2-upstream-kcsan-gce
2019/10/08 13:56 https://github.com/google/ktsan.git kcsan 3675607974a2 137e37ca .config console log report ci2-upstream-kcsan-gce
2019/10/08 11:51 https://github.com/google/ktsan.git kcsan c1c7521f03c7 64612bfd .config console log report ci2-upstream-kcsan-gce
2019/10/08 10:49 https://github.com/google/ktsan.git kcsan c1c7521f03c7 64612bfd .config console log report ci2-upstream-kcsan-gce
2019/10/07 09:38 https://github.com/google/ktsan.git kcsan c1c7521f03c7 28ac6e64 .config console log report ci2-upstream-kcsan-gce
2019/10/07 08:32 https://github.com/google/ktsan.git kcsan c1c7521f03c7 28ac6e64 .config console log report ci2-upstream-kcsan-gce
2019/10/07 07:51 https://github.com/google/ktsan.git kcsan c1c7521f03c7 28ac6e64 .config console log report ci2-upstream-kcsan-gce
2019/10/05 03:44 https://github.com/google/ktsan.git kcsan c1c7521f03c7 f3f7d9c8 .config console log report ci2-upstream-kcsan-gce
2019/10/05 02:56 https://github.com/google/ktsan.git kcsan c1c7521f03c7 f3f7d9c8 .config console log report ci2-upstream-kcsan-gce
2019/10/05 02:09 https://github.com/google/ktsan.git kcsan c1c7521f03c7 f3f7d9c8 .config console log report ci2-upstream-kcsan-gce
2019/10/05 02:07 https://github.com/google/ktsan.git kcsan c1c7521f03c7 f3f7d9c8 .config console log report ci2-upstream-kcsan-gce
2019/10/04 17:09 https://github.com/google/ktsan.git kcsan b4bd934316dc c86336cf .config console log report ci2-upstream-kcsan-gce
2019/10/04 14:20 https://github.com/google/ktsan.git kcsan b4bd934316dc c86336cf .config console log report ci2-upstream-kcsan-gce
2019/10/04 14:15 https://github.com/google/ktsan.git kcsan b4bd934316dc c86336cf .config console log report ci2-upstream-kcsan-gce
2019/10/04 14:06 https://github.com/google/ktsan.git kcsan b4bd934316dc c86336cf .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.