KCSAN: data-race in do_group_exit / do_group

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in do_group_exit / do_group_exit (3) kasan	6	2	1995d	2025d	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	1877d	1954d	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	1775d	1782d	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	857d	857d	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	2163d	2179d	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	817d	817d	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	1518d	1518d	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	1636d	1726d	0/29	auto-closed as invalid on 2021/06/27 02:37

================================================================== BUG: KCSAN: data-race in do_group_exit / do_group_exit write to 0xffff88811f85ad74 of 4 bytes by task 10433 on cpu 0: do_group_exit+0x1a6/0x1c0 kernel/exit.c:915 __do_sys_exit_group kernel/exit.c:932 [inline] __se_sys_exit_group kernel/exit.c:930 [inline] __x64_sys_exit_group+0x2e/0x30 kernel/exit.c:930 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88811f85ad74 of 4 bytes by task 10438 on cpu 1: do_group_exit+0x7b/0x1c0 kernel/exit.c:904 __do_sys_exit_group kernel/exit.c:932 [inline] __se_sys_exit_group kernel/exit.c:930 [inline] __x64_sys_exit_group+0x2e/0x30 kernel/exit.c:930 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 10438 Comm: syz-executor.5 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 10438 Comm: syz-executor.5 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xf5/0x159 lib/dump_stack.c:113 panic+0x210/0x640 kernel/panic.c:221 kcsan_report.cold+0xc/0x10 kernel/kcsan/report.c:302 __kcsan_setup_watchpoint+0x32e/0x4a0 kernel/kcsan/core.c:411 __tsan_read4 kernel/kcsan/kcsan.c:35 [inline] __tsan_read4+0x2c/0x30 kernel/kcsan/kcsan.c:35 do_group_exit+0x7b/0x1c0 kernel/exit.c:904 __do_sys_exit_group kernel/exit.c:932 [inline] __se_sys_exit_group kernel/exit.c:930 [inline] __x64_sys_exit_group+0x2e/0x30 kernel/exit.c:930 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x459ef9 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7fdaa0c6c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000000459ef9 RDX: 0000000000000003 RSI: 00007f7fdaa0c700 RDI: 0000000000000007 RBP: 000000000075bfc8 R08: 00007f7fdaa0d700 R09: 0000000000000000 R10: 00007f7fdaa0d700 R11: 0000000000000246 R12: 000000000075c008 R13: 00000000004c088f R14: 00000000004d2f88 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..