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: 759d, last: 1h53m
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 828d 828d 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 0xffffffff860d51f0 of 4 bytes by task 0 on cpu 1:
 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
 start_secondary+0x78/0x80 arch/x86/kernel/smpboot.c:262
 secondary_startup_64_no_verify+0xcf/0xdb

read to 0xffffffff860d51f0 of 4 bytes by task 0 on cpu 0:
 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
 rest_init+0xe8/0xf0 init/main.c:727
 start_kernel+0x0/0x656 init/main.c:883
 start_kernel+0x5d1/0x656 init/main.c:1138
 secondary_startup_64_no_verify+0xcf/0xdb

value changed: 0x00000001 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.0.0-rc7-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
==================================================================

Crashes (471):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-kcsan-gce 2022/09/26 17:58 upstream f76349cf4145 d59ba983 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/09/23 23:16 upstream bf682942cd26 0042f2b4 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/09/20 19:48 upstream 60891ec99e14 c4b8ccfd .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/09/20 00:33 upstream 521a547ced64 dd9a85ff .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/09/17 21:19 upstream a335366bad13 dd9a85ff .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/09/16 12:04 upstream 3245cb65fd91 dd9a85ff .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/09/10 02:46 upstream ce888220d5c7 356d8217 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/09/04 11:21 upstream 7726d4c3e60b 28811d0a .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/09/01 20:29 upstream 2880e1a175b9 86c46e46 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/30 02:03 upstream b90cb1053190 d7593c58 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/27 23:41 upstream 89b749d8552d 07177916 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/26 18:15 upstream 4c612826bec1 e5a303f1 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/22 19:49 upstream 1c23f9e627a7 26a13b38 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/22 06:48 upstream e3f259d33c0e 26a13b38 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/16 23:58 upstream 7ebfc85e2cd7 9e4b39c2 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/13 06:54 upstream 7ebfc85e2cd7 8dfcaa3d .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/06 10:02 upstream 9e2f40233670 e853abd9 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/08/03 13:14 upstream e2b542100719 1c9013ac .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/29 14:57 upstream 6e2c0490769e fef302b1 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/26 21:23 upstream 5de64d44968e ae971e66 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/24 06:27 upstream 515f71412bb7 22343af4 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/21 00:47 upstream 353f7988dd84 88cb1383 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/19 14:39 upstream ca85855bdcae 72a3cc0c .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/18 23:47 upstream 80e19f34c288 ff988920 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/16 03:34 upstream 9b59ec8d50a1 95cb00d1 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/15 04:16 upstream 9bd572ec7a66 5d921b08 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/12 08:15 upstream 5a29232d870d da3d6955 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/10 23:32 upstream d9919d43cbf6 b5765a15 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/07/01 15:28 upstream a175eca0f3d7 1434eec0 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/06/18 16:03 upstream 4b35035bcf80 8f633d84 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/06/08 03:56 upstream 9886142c7a22 b2706118 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/06/07 07:05 upstream e71e60cd74df c8857892 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/06/06 21:04 upstream f2906aa86338 c8857892 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/06/03 11:28 upstream 50fd82b3a9a9 eee80d3c .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/06/02 18:52 upstream d1dc87763f40 6e12f05f .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/29 03:05 upstream 664a393a2663 a46af346 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/26 20:45 upstream 16477cdfefdb 3037caa9 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/24 05:08 upstream 140e40e39a29 e7f9308d .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/23 20:05 upstream 4b0986a3613c 4c7657cb .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/21 23:17 upstream 6c3f5bec9b40 7268fa62 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/20 14:33 upstream 3d7285a335ed cb1ac2e7 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/17 17:57 upstream 42226c989789 744a39e2 .config log report info 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 log report info
ci2-upstream-kcsan-gce 2020/11/22 08:43 upstream a349e4c65960 0d27f508 .config log report info
ci2-upstream-kcsan-gce 2020/08/27 21:23 upstream 15bc20c6af4c 816e0689 .config log report
* Struck through repros no longer work on HEAD.