================================================================== BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer write to 0xffffffff85caf310 of 4 bytes by interrupt on cpu 1: tick_sched_do_timer+0xc0/0xe0 kernel/time/tick-sched.c:132 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 read to 0xffffffff85caf310 of 4 bytes by interrupt on cpu 0: tick_sched_do_timer+0x33/0xe0 kernel/time/tick-sched.c:128 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7216 Comm: syz-fuzzer Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7216 Comm: syz-fuzzer Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xf5/0x159 lib/dump_stack.c:113 panic+0x209/0x639 kernel/panic.c:219 kcsan_report.cold+0xc/0x1b kernel/kcsan/report.c:303 __kcsan_setup_watchpoint+0x3ee/0x510 kernel/kcsan/core.c:455 __tsan_read4 kernel/kcsan/kcsan.c:30 [inline] __tsan_read4+0x2c/0x30 kernel/kcsan/kcsan.c:30 tick_sched_do_timer+0x33/0xe0 kernel/time/tick-sched.c:128 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0033:0x41d197 Code: 08 49 83 f8 08 0f 8d e7 00 00 00 48 39 de 0f 83 de 00 00 00 0f ba e2 00 0f 83 ca 00 00 00 4c 8b 4c 24 78 4e 8d 14 0e 4d 8b 12 <4d> 85 d2 74 c9 4c 39 d0 77 c4 49 39 ca 73 bf 4c 89 44 24 48 48 89 RSP: 002b:000000c4203cbe10 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13 RAX: 000000c420000000 RBX: 0000000000040000 RCX: 000000c420630000 RDX: 0000000000000005 RSI: 0000000000013020 RDI: 00007ff297f20000 RBP: 000000c4203cbe78 R08: 0000000000000004 R09: 00000000011e3520 R10: 00000000008a414d R11: 000000c4203cbfc0 R12: 0000000000000000 R13: 00000000000000f6 R14: 0000000000000076 R15: 0000000000000080 Kernel Offset: disabled Rebooting in 86400 seconds..