syzbot


KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
Status: moderation: reported on 2020/09/21 17:51
Reported-by: syzbot+56078ac0b9071335a745@syzkaller.appspotmail.com
First crash: 707d, last: 1d09h

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

write to 0xffffffff85ece2f0 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick+0xa0/0x400 kernel/time/tick-sched.c:888
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1109 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1130
 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+0xcf/0xdb

read to 0xffffffff85ece2f0 of 4 bytes by task 0 on cpu 0:
 tick_nohz_next_event+0x1ee/0x2c0 kernel/time/tick-sched.c:853
 tick_nohz_get_sleep_length+0x15b/0x250 kernel/time/tick-sched.c:1239
 menu_select+0x347/0x1010 drivers/cpuidle/governors/menu.c:283
 cpuidle_select+0x3d/0x50 drivers/cpuidle/cpuidle.c:322
 cpuidle_idle_call kernel/sched/idle.c:229 [inline]
 do_idle+0x17e/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+0x0/0x656 init/main.c:882
 start_kernel+0x5d1/0x656 init/main.c:1137
 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 5.18.0-syzkaller-07496-gd7227785e384-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (891):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-kcsan-gce 2022/05/26 06:24 upstream d7227785e384 3037caa9 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/25 16:38 upstream fdaf9a5840ac 3037caa9 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/24 01:30 upstream 140e40e39a29 e7f9308d .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/23 10:37 upstream 4b0986a3613c 4c7657cb .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/23 05:47 upstream 978df3e15846 7268fa62 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/22 06:55 upstream eaea45fc0e7b 7268fa62 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/20 19:00 upstream 3d7285a335ed bd37ad7e .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/20 14:16 upstream 3d7285a335ed cb1ac2e7 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/20 01:59 upstream b015dcd62b86 cb1ac2e7 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/19 11:35 upstream f993aed406ea cb1ac2e7 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/19 06:47 upstream f993aed406ea 50c53f39 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/18 21:57 upstream ef1302160bfb 50c53f39 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/18 04:42 upstream 210e04ff7681 744a39e2 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/16 11:12 upstream 42226c989789 744a39e2 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/15 19:32 upstream bc403203d65a 744a39e2 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/14 00:30 upstream f2dd007445b1 107f6434 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/13 09:51 upstream f3f19f939c11 7ce5a022 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/13 02:39 upstream 0ac824f379fb 9ad6612a .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/12 02:11 upstream feb9c5e19e91 beb0b407 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/10 23:42 upstream feb9c5e19e91 8d7b3b67 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/10 00:55 upstream 9be9ed2612b5 8b277b8e .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/09 10:57 upstream c5eb0a61238d 8b277b8e .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/09 04:02 upstream c5eb0a61238d e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/09 01:36 upstream c5eb0a61238d e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/08 16:43 upstream 30c8e80f7932 e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/08 13:49 upstream 30c8e80f7932 e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/08 12:35 upstream 30c8e80f7932 e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/08 02:19 upstream 30c8e80f7932 e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/07 20:52 upstream 30c8e80f7932 e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/07 15:37 upstream 4b97bac0756a e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/07 07:54 upstream 4b97bac0756a e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/07 03:30 upstream 4b97bac0756a e60b1103 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/06 00:13 upstream 0f5d752b1395 efeff0a5 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/05 17:37 upstream a7391ad35724 b3f09415 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/05/01 07:14 upstream 57ae8a492116 2df221f6 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/30 15:55 upstream 8013d1d3d2e3 2df221f6 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/29 17:49 upstream 38d741cb70b3 44a5ca63 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/28 16:48 upstream 8f4dd16603ce e9076525 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/28 04:49 upstream 8f4dd16603ce 8a1f1f07 .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/27 11:22 upstream 46cf2c613f4b 1fa34c1b .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/26 22:23 upstream cf424ef014ac 1fa34c1b .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2022/04/26 06:46 upstream d615b5416f8a 1fa34c1b .config log report info KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce 2021/01/17 12:23 upstream 0da0a8a0a0e1 813be542 .config log report info
ci2-upstream-kcsan-gce 2020/09/21 07:59 upstream ba4f184e126b c81d99c8 .config log report info
ci2-upstream-kcsan-gce 2020/09/18 13:23 upstream 10b82d517648 38962c8b .config log report info
ci2-upstream-kcsan-gce 2020/06/18 22:05 upstream 1b5044021070 3ea11d3f .config log report