syzbot


KCSAN: data-race in exit_signals / mm_update_next_owner (4)

Status: auto-closed as invalid on 2021/07/07 06:50
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+66ebc4dba60062669bed@syzkaller.appspotmail.com
First crash: 1369d, last: 1021d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in exit_signals / mm_update_next_owner (3) kernel 15 1389d 1526d 0/26 closed as invalid on 2020/06/18 14:24
upstream KCSAN: data-race in exit_signals / mm_update_next_owner kasan 2 1601d 1606d 0/26 closed as invalid on 2019/11/19 13:24
upstream KCSAN: data-race in exit_signals / mm_update_next_owner (2) kernel 4 1550d 1576d 0/26 closed as invalid on 2020/01/09 14:13

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

write to 0xffff888146bc502c of 4 bytes by task 526 on cpu 1:
 exit_signals+0xe1/0x4a0 kernel/signal.c:2927
 do_exit+0x194/0x1560 kernel/exit.c:782
 do_group_exit+0x19b/0x1a0 kernel/exit.c:923
 __do_sys_exit_group+0xb/0x10 kernel/exit.c:934
 __se_sys_exit_group+0x5/0x10 kernel/exit.c:932
 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:932
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888146bc502c of 4 bytes by task 535 on cpu 0:
 mm_update_next_owner+0x1d9/0x520 kernel/exit.c:389
 exit_mm+0x358/0x450 kernel/exit.c:501
 do_exit+0x3ff/0x1560 kernel/exit.c:813
 do_group_exit+0x19b/0x1a0 kernel/exit.c:923
 __do_sys_exit_group+0xb/0x10 kernel/exit.c:934
 __se_sys_exit_group+0x5/0x10 kernel/exit.c:932
 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:932
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00404040 -> 0x00404044

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 535 Comm: syz-executor.5 Not tainted 5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (133):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/06/02 06:50 upstream 231bc5390667 032639db .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/30 07:19 upstream b90e90f40b4f 325a8dab .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/28 22:40 upstream 5ff2756afde0 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/28 09:42 upstream 97e5bf604b7a 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/26 13:50 upstream ad9f25d33860 750ce164 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/25 08:08 upstream 1434a3127887 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/24 02:16 upstream 6ebb6814a1ef 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/23 16:20 upstream 4d7620341eda 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/21 19:09 upstream 79a106fc6585 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/19 19:21 upstream c3d0e3fd41b7 a343ba6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/18 03:47 upstream 8ac91e6c6033 a343ba6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/15 07:34 upstream 25a1298726e9 8bdd5343 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/14 22:02 upstream bd3c9cdb21a2 8bdd5343 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/14 05:06 upstream 315d99318179 8bdd5343 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/10 03:36 upstream 9819f682e48c bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/08 12:10 upstream dd860052c99b bc5434be .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/07 09:08 upstream e48661230cc3 f6da8120 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/04 18:18 upstream 5e321ded302d 06c27ff5 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/05/01 11:03 upstream 9f67672a817e 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/29 16:24 upstream d72cd4ad4174 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/28 13:27 upstream e359bce39d90 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/27 13:34 upstream 4a0225c3d208 805b5003 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/27 06:42 upstream 9f4ad9e425a1 8ee2dea6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/26 12:26 upstream 9f4ad9e425a1 805b5003 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/22 12:21 upstream 16fc44d6387e 33c28d03 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/22 00:02 upstream 16fc44d6387e 2bc8999a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/21 13:04 upstream 1fe5501ba1ab 95777977 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/18 13:26 upstream c98ff1d013d2 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/17 08:43 upstream 9cdbf6467424 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/16 08:01 upstream 7e25f40eab52 c59079a6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/15 18:59 upstream 7f75285ca572 c59079a6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/15 00:38 upstream 7f75285ca572 fcdb12ba .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/04 02:03 upstream d93a0d43e3d0 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/01 19:51 upstream ffd9fb546d49 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/04/01 05:57 upstream d19cc4bfbff1 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/03/30 21:10 upstream 2bb25b3a748a 6a81331a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/03/25 16:41 upstream e138138003eb 6a383ecf .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/03/19 17:22 upstream 8b12a62a4e3e 2af9d324 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/03/11 04:52 upstream a74e6a014c9d c2ca1f2a .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/03/10 19:39 upstream 05a59d79793d 764067f3 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/02/14 04:50 upstream ac30d8ce28d6 98682e5e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/02/02 07:42 upstream 88bb507a74ea e6b95f32 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/02/01 19:04 upstream 1048ba83fb1c e6b95f32 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/01/31 14:36 upstream 6642d600b541 fc9fd31e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in exit_signals / mm_update_next_owner
2021/01/17 05:50 upstream 54c6247d06f1 65a7a854 .config console log report info ci2-upstream-kcsan-gce
2020/11/12 06:49 upstream 3d5e28bff7ad cca87986 .config console log report info ci2-upstream-kcsan-gce
2020/06/19 00:44 upstream 1b5044021070 3ea11d3f .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.