syzbot


KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick (2)

Status: moderation: reported on 2020/11/23 09:55
Reported-by: syzbot+23a256029191772c2f02@syzkaller.appspotmail.com
First crash: 884d, last: 2h21m
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick 1 953d 953d 0/24 auto-closed as invalid on 2020/07/24 20:53

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

write to 0xffffffff85ed5170 of 4 bytes by task 0 on cpu 0:
 tick_nohz_stop_tick+0xa0/0x400 kernel/time/tick-sched.c:887
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1108 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1129
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x18a/0x250 kernel/sched/idle.c:303
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 rest_init+0xe8/0xf0 init/main.c:732
 arch_call_rest_init+0x5/0x10 init/main.c:894
 start_kernel+0x59e/0x630 init/main.c:1148
 secondary_startup_64_no_verify+0xcf/0xdb

read to 0xffffffff85ed5170 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick+0x7a/0x400 kernel/time/tick-sched.c:886
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1108 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1129
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x18a/0x250 kernel/sched/idle.c:303
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 start_secondary+0x78/0x80 arch/x86/kernel/smpboot.c:264
 secondary_startup_64_no_verify+0xcf/0xdb

value changed: 0x00000000 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.2.0-rc5-syzkaller-00205-gc96618275234-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
==================================================================

Crashes (539):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-upstream-kcsan-gce 2023/01/29 18:08 upstream c96618275234 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/28 01:46 upstream 83abd4d4c4be 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/26 20:48 upstream 7c46948a6e9c 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/23 17:33 upstream 2475bf0250de 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/23 09:22 upstream 2475bf0250de 44388686 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/22 12:54 upstream 2241ab53cbb5 cc0f9968 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/20 15:19 upstream d368967cb103 dd15ff29 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/19 07:04 upstream 7287904c8771 66fca3ae .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/17 16:31 upstream 6e50979a9c87 42660d9e .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/15 10:07 upstream 7c6984405241 a63719e7 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/12 21:51 upstream e8f60cd7db24 96166539 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/10 08:07 upstream 5a41237ad1d4 48bc529a .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/08 10:16 upstream 9b43a525db12 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/06 13:32 upstream 41c03ba9beea 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/04 16:03 upstream 69b41ac87e4a 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/02 22:08 upstream 88603b6dc419 ab32d508 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/01 19:39 upstream e4cf7c25bae5 ab32d508 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2023/01/01 02:36 upstream c8451c141e07 ab32d508 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/27 15:41 upstream 1b929c02afd3 44712fbc .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/24 08:25 upstream 51094a24b85e 9da18ae8 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/22 16:09 upstream 0a924817d2ed 9da18ae8 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/20 05:06 upstream aeba12b26c79 c52b2efb .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/18 23:52 upstream f9ff5644bcc0 05494336 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/17 21:17 upstream 77856d911a8c 05494336 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/16 01:25 upstream 041fae9c105a 6f9c033e .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/14 06:40 upstream 764822972d64 f6511626 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/12 00:29 upstream 4cee37b3a4e6 67be1ae7 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/11 12:41 upstream 296a7b7eb792 67be1ae7 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/09 05:30 upstream f3e8416619ce 1034e5fa .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/08 06:58 upstream 479174d402bc d88f3abb .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/03 16:08 upstream 97ee9d1c1696 e080de16 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/12/02 21:56 upstream a4412fdd49dc e080de16 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/28 17:25 upstream b7b275e60bcd 247de55b .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/26 22:54 upstream 644e9524388a f4470a7b .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/25 20:17 upstream 08ad43d554ba f4470a7b .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/25 17:42 upstream c3eb11fbb826 74a66371 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/24 06:34 upstream 4312098baf37 ff68ff8f .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/22 14:53 upstream eb7081409f94 9da37ae8 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/20 16:24 upstream 77c51ba552a1 5bb70014 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/19 03:53 upstream ab290eaddc4c 5bb70014 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/18 09:51 upstream 84368d882b96 5bb70014 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/17 18:37 upstream 81ac25651a62 4ba8ab94 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/15 23:11 upstream 81e7cfa3a9eb 3a127a31 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/04 01:58 upstream f2f32f8af2b0 6d752409 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/11/02 03:47 upstream f526d6a82242 08977f5d .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/10/31 21:26 upstream 30a0b95b1335 2a71366b .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/10/29 04:13 upstream 576e61cea1e4 899d812a .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/10/28 13:23 upstream 23758867219c 8168b69e .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/10/28 04:22 upstream 23758867219c 5c716ff6 .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/10/27 02:42 upstream 4dc12f37a8e9 86777b7f .config console log report info [disk image] [vmlinux] [kernel image] KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2021/01/16 00:58 upstream 5ee88057889b 65a7a854 .config console log report info
ci2-upstream-kcsan-gce 2020/11/22 08:43 upstream a349e4c65960 0d27f508 .config console log report info
ci2-upstream-kcsan-gce 2020/08/27 21:23 upstream 15bc20c6af4c 816e0689 .config console log report
* Struck through repros no longer work on HEAD.