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KCSAN: data-race in do_group_exit / do_group_exit (8)

Status: auto-obsoleted due to no activity on 2023/08/15 00:36
Subsystems: kernel
[Documentation on labels]
First crash: 291d, last: 291d
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in do_group_exit / do_group_exit kasan 1 1646d 1646d 0/26 closed as invalid on 2019/11/19 13:44
upstream KCSAN: data-race in do_group_exit / do_group_exit (3) kasan 2 1429d 1460d 0/26 closed as invalid on 2020/06/18 14:24
upstream KCSAN: data-race in do_group_exit / do_group_exit (4) kernel 6 1312d 1389d 0/26 auto-closed as invalid on 2020/10/28 04:41
upstream KCSAN: data-race in do_group_exit / do_group_exit (5) kernel 2 1210d 1216d 0/26 auto-closed as invalid on 2021/02/07 13:19
upstream KCSAN: data-race in do_group_exit / do_group_exit (2) kasan 4 1598d 1614d 0/26 auto-closed as invalid on 2020/02/20 16:37
upstream KCSAN: data-race in do_group_exit / do_group_exit (9) kernel 1 251d 251d 0/26 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 1 953d 953d 0/26 auto-closed as invalid on 2021/10/22 14:01
upstream KCSAN: data-race in do_group_exit / do_group_exit (6) kernel 12 1070d 1161d 0/26 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 0xffff888138c68074 of 4 bytes by task 29716 on cpu 0:
 do_group_exit+0xd6/0x150 kernel/exit.c:1018
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888138c68074 of 4 bytes by task 29715 on cpu 1:
 do_group_exit+0x3e/0x150 kernel/exit.c:1003
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000002 -> 0x00000004

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 29715 Comm: syz-executor.2 Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/11 00:31 upstream 3f01e9fed845 d47e94ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in do_group_exit / do_group_exit
* Struck through repros no longer work on HEAD.