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KCSAN: data-race in do_group_exit / do_group_exit (4)

Status: auto-closed as invalid on 2020/10/28 04:41
Subsystems: kernel
[Documentation on labels]
First crash: 2077d, last: 2000d
▶ ▼ 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 2334d 2334d 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 2117d 2148d 0/29 closed as invalid on 2020/06/18 14:24
upstream KCSAN: data-race in do_group_exit / do_group_exit (5) kernel 6 2 1898d 1904d 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 979d 979d 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 2285d 2301d 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 939d 939d 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 1641d 1641d 0/29 auto-closed as invalid on 2021/10/22 14:01
upstream KCSAN: data-race in do_group_exit / do_group_exit (6) kernel 6 12 1758d 1848d 0/29 auto-closed as invalid on 2021/06/27 02:37

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

write to 0xffff88807dbe7774 of 4 bytes by task 14610 on cpu 1:
 do_group_exit+0x137/0x180 kernel/exit.c:897
 __do_sys_exit_group+0xb/0x10 kernel/exit.c:914
 __se_sys_exit_group+0x5/0x10 kernel/exit.c:912
 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:912
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88807dbe7774 of 4 bytes by task 14615 on cpu 0:
 signal_group_exit include/linux/sched/signal.h:268 [inline]
 do_group_exit+0x55/0x180 kernel/exit.c:886
 __do_sys_exit_group+0xb/0x10 kernel/exit.c:914
 __se_sys_exit_group+0x5/0x10 kernel/exit.c:912
 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:912
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14615 Comm: syz-executor.3 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/09/23 04:36 upstream eff48ddeab78 3e8f6c27 .config console log report info ci2-upstream-kcsan-gce
2020/08/27 07:17 upstream 15bc20c6af4c 816e0689 .config console log report ci2-upstream-kcsan-gce
2020/08/15 23:34 upstream 410520d07f5c 5ce13532 .config console log report ci2-upstream-kcsan-gce
2020/08/11 09:22 upstream 4bcf69e57063 d3694ffb .config console log report ci2-upstream-kcsan-gce
2020/08/01 07:20 upstream 7dc6fd0f3b84 8df85ed9 .config console log report ci2-upstream-kcsan-gce
2020/07/08 05:45 upstream aa27b32b76d0 08fc4ef1 .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.