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KCSAN: data-race in do_group_exit / do_group_exit (6)

Status: auto-closed as invalid on 2021/06/27 02:37
Subsystems: kernel
[Documentation on labels]
First crash: 1845d, last: 1755d
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in do_group_exit / do_group_exit kasan 6 1 2330d 2330d 0/29 closed as invalid on 2019/11/19 13:44
upstream KCSAN: data-race in do_group_exit / do_group_exit (3) kasan 6 2 2114d 2144d 0/29 closed as invalid on 2020/06/18 14:24
upstream KCSAN: data-race in do_group_exit / do_group_exit (4) kernel 6 6 1996d 2073d 0/29 auto-closed as invalid on 2020/10/28 04:41
upstream KCSAN: data-race in do_group_exit / do_group_exit (5) kernel 6 2 1894d 1901d 0/29 auto-closed as invalid on 2021/02/07 13:19
upstream KCSAN: data-race in do_group_exit / do_group_exit (8) kernel 6 1 976d 976d 0/29 auto-obsoleted due to no activity on 2023/08/15 00:36
upstream KCSAN: data-race in do_group_exit / do_group_exit (2) kasan 6 4 2282d 2298d 0/29 auto-closed as invalid on 2020/02/20 16:37
upstream KCSAN: data-race in do_group_exit / do_group_exit (9) kernel 6 1 936d 936d 0/29 auto-obsoleted due to no activity on 2023/09/23 23:34
upstream KCSAN: data-race in do_group_exit / do_group_exit (7) kernel 6 1 1637d 1637d 0/29 auto-closed as invalid on 2021/10/22 14:01

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

write to 0xffff88814c26d234 of 4 bytes by task 18541 on cpu 1:
 do_group_exit+0x136/0x1a0 kernel/exit.c:917
 __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 0xffff88814c26d234 of 4 bytes by task 18515 on cpu 0:
 signal_group_exit include/linux/sched/signal.h:269 [inline]
 do_group_exit+0x51/0x1a0 kernel/exit.c:906
 __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

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 18515 Comm: syz-executor.1 Not tainted 5.13.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/05/23 02:32 upstream 23d729263037 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/05/15 17:15 upstream 25a1298726e9 93f844de .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/05/14 04:18 upstream 315d99318179 8bdd5343 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/05/12 01:08 upstream 88b06399c9c7 b3c3bb8e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/05/06 08:39 upstream a79cdfba68a1 06c27ff5 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/05/02 12:02 upstream 17ae69aba89d 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/05/02 00:07 upstream 10a3efd0fee5 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/04/28 22:22 upstream 68a32ba14177 77e2b668 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/04/26 09:27 upstream 9f4ad9e425a1 805b5003 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/04/26 02:54 upstream d2d09fbe33f8 2a82f1b3 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/04/19 01:17 upstream bf05bf16c76b 7e2b734b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
2021/02/21 16:56 upstream e767b3530acb 3e5ed8b4 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
* Struck through repros no longer work on HEAD.