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: 631d, last: 22h50m
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 700d 700d 0/22 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 0xffffffff85ed1ea0 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick+0xa5/0x410 kernel/time/tick-sched.c:888
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1107 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1128
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x195/0x250 kernel/sched/idle.c:303
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 start_secondary+0x78/0x80 arch/x86/kernel/smpboot.c:266
 secondary_startup_64_no_verify+0xc4/0xcb

read to 0xffffffff85ed1ea0 of 4 bytes by task 0 on cpu 0:
 tick_nohz_stop_tick+0x7f/0x410 kernel/time/tick-sched.c:887
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1107 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1128
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x195/0x250 kernel/sched/idle.c:303
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 rest_init+0xe8/0xf0 init/main.c:726
 start_kernel+0x0/0x669 init/main.c:882
 start_kernel+0x5e4/0x669 init/main.c:1140
 secondary_startup_64_no_verify+0xc4/0xcb

value changed: 0x00000001 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.18.0-rc7-syzkaller-00121-g3d7285a335ed-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (431):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
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 2022/05/14 15:39 upstream ec7f49619d8e 744a39e2 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/14 01:53 upstream f2dd007445b1 107f6434 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/10 14:00 upstream 9be9ed2612b5 8b277b8e .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/07 07:56 upstream 4b97bac0756a e60b1103 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/03 05:52 upstream 9050ba3a61a4 2df221f6 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/02 07:02 upstream b2da7df52e16 2df221f6 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/28 21:14 upstream 259b897e5a79 e9076525 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/28 13:53 upstream 8f4dd16603ce 8a1f1f07 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/27 17:29 upstream 46cf2c613f4b 1fa34c1b .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/27 02:13 upstream cf424ef014ac 1fa34c1b .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/26 15:27 upstream d615b5416f8a 1fa34c1b .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/25 23:17 upstream af2d861d4cd2 152baedd .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/25 00:07 upstream 42740a2ff5d3 131df97d .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/20 06:25 upstream 559089e0a93d 7d7bc738 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/18 10:01 upstream b2d229d4ddb1 8bcc32a6 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/17 06:45 upstream 90ea17a9e27b 8bcc32a6 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/15 02:48 upstream a19944809fe9 b17b2923 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/12 13:02 upstream ce522ba9ef7e af01ee7d .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/07 07:28 upstream 3e732ebf7316 53c67432 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/06 13:01 upstream 3e732ebf7316 86b4b7f8 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/05 15:49 upstream 312310928417 0127c10f .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/02 11:34 upstream 88e6c0207623 79a2a8fc .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/02 03:16 upstream d0d642a5d365 79a2a8fc .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/01 15:11 upstream e8b767f5e040 79a2a8fc .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/30 19:03 upstream d888c83fcec7 42718dd6 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/29 18:49 upstream 1930a6e739c4 6bdac766 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/28 22:20 upstream ae085d7f9365 6bdac766 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/27 08:12 upstream bddac7c1e02b 89bc8608 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/24 08:04 upstream 6b1f86f8e9c7 5ff41e94 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/22 14:32 upstream b47d5a4f6b8d d88ef0c5 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/18 08:38 upstream 551acdc3c3d2 e2d91b1d .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/17 17:22 upstream 56e337f2cf13 dfa9a8ed .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/14 01:29 upstream f0e18b03fcaf 9e8eaa75 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/13 21:16 upstream f0e18b03fcaf 9e8eaa75 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/13 06:58 upstream aad611a868d1 9e8eaa75 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/11 17:06 upstream 79b00034e9dc 9e8eaa75 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/06 00:40 upstream 0014404f9c18 7bdd8b2c .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/03 17:18 upstream 5859a2b19911 45a13a73 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/03/03 04:03 upstream 92ebf5f91b4d 45a13a73 .config log report info KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/02/25 08:44 upstream 53ab78cd6d5a 7c337266 .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