syzbot


KCSAN: data-race in tick_sched_timer / tick_sched_timer

Status: moderation: reported on 2020/07/30 16:33
Reported-by: syzbot+867130cb240c41f15164@syzkaller.appspotmail.com
First crash: 834d, last: 10h44m

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

write to 0xffffffff860d51f0 of 4 bytes by interrupt on cpu 1:
 tick_sched_do_timer kernel/time/tick-sched.c:193 [inline]
 tick_sched_timer+0x2b0/0x2d0 kernel/time/tick-sched.c:1473
 __run_hrtimer+0x132/0x420 kernel/time/hrtimer.c:1685
 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline]
 hrtimer_interrupt+0x36e/0xa70 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0xa3/0x250 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x39/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649

read to 0xffffffff860d51f0 of 4 bytes by interrupt on cpu 0:
 tick_sched_do_timer kernel/time/tick-sched.c:189 [inline]
 tick_sched_timer+0x42/0x2d0 kernel/time/tick-sched.c:1473
 __run_hrtimer+0x132/0x420 kernel/time/hrtimer.c:1685
 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline]
 hrtimer_interrupt+0x36e/0xa70 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0xa3/0x250 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x39/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649

value changed: 0xffffffff -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1793 Comm: syz-fuzzer Not tainted 6.0.0-rc7-syzkaller-00180-g70575e77839f-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
==================================================================

Crashes (1354):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-kcsan-gce 2022/09/30 18:48 upstream 70575e77839f feb56351 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/30 08:23 upstream 987a926c1d8a 45fd7169 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/29 13:41 upstream c3e0e1e23c70 45fd7169 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/28 22:14 upstream 49c13ed0316d a41a2080 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/28 01:06 upstream 46452d3786a8 75c78242 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/27 04:31 upstream 3800a713b607 d59ba983 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/26 09:56 upstream f76349cf4145 d59ba983 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/25 23:33 upstream 5e049663f678 0042f2b4 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/25 05:12 upstream 1a61b828566f 0042f2b4 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/24 10:13 upstream a63f2e7cb110 0042f2b4 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/23 15:01 upstream bf682942cd26 0042f2b4 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/22 18:13 upstream dc164f4fb00a 0042f2b4 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/22 17:50 upstream dc164f4fb00a 0042f2b4 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/22 13:17 upstream dc164f4fb00a 60af5050 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/22 02:45 upstream 06f7db949993 60af5050 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/21 19:58 upstream 06f7db949993 380f82fb .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/21 12:11 upstream 60891ec99e14 380f82fb .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/20 20:05 upstream 60891ec99e14 c4b8ccfd .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/20 08:27 upstream 521a547ced64 7c41a9ba .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/19 12:59 upstream 521a547ced64 dd9a85ff .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/19 07:22 upstream 521a547ced64 dd9a85ff .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/18 19:10 upstream 38eddeedbbea dd9a85ff .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/17 05:50 upstream a335366bad13 dd9a85ff .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/16 17:32 upstream 6879c2d3b960 dd9a85ff .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/15 07:42 upstream 3245cb65fd91 dd9a85ff .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/14 10:26 upstream 3245cb65fd91 b884348d .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/13 21:36 upstream d1221cea11fc b884348d .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/13 13:57 upstream d1221cea11fc a08652b0 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/13 07:57 upstream e839a756012b a08652b0 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/12 23:45 upstream e839a756012b f371ed7e .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/12 16:38 upstream 80e78fcce86d f371ed7e .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/12 11:29 upstream 80e78fcce86d 356d8217 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/11 20:50 upstream 4ed9c1e971b1 356d8217 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/10 18:37 upstream b96fbd602d35 356d8217 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/10 00:53 upstream ce888220d5c7 356d8217 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/09 14:23 upstream 9b4509495418 90058bdc .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/09 03:34 upstream 506357871c18 f3027468 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/08 13:28 upstream 26b1224903b3 f3027468 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/07 23:41 upstream 0066f1b0e275 435aeef7 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/07 15:08 upstream 0066f1b0e275 c5b7bc57 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/06 22:43 upstream d2ec799d1c1b 5fc30c37 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/06 20:25 upstream d2ec799d1c1b 65aea2b9 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/06 12:28 upstream 53e99dcff61e 65aea2b9 .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/05 22:46 upstream 53e99dcff61e 9dcd38fc .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2022/09/05 12:01 upstream 7e18e42e4b28 922294ab .config log report info KCSAN: data-race in tick_sched_timer / tick_sched_timer
ci2-upstream-kcsan-gce 2021/01/16 08:12 upstream 1d94330a437a 65a7a854 .config log report info
ci2-upstream-kcsan-gce 2020/07/29 23:48 upstream 6ba1b005ffc3 233283a1 .config log report
ci2-upstream-kcsan-gce 2020/07/29 13:50 upstream 6ba1b005ffc3 19a8de55 .config log report
ci2-upstream-kcsan-gce 2020/06/18 22:07 upstream 1b5044021070 3ea11d3f .config log report
* Struck through repros no longer work on HEAD.