Hello,
syzbot found the following issue on:
HEAD commit: 6ba1b005 Merge tag 'asm-generic-fixes-5.8' of git://
git.ke..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=17cd3ff8900000
kernel config:
https://syzkaller.appspot.com/x/.config?x=c9ef42681860b2c5
dashboard link:
https://syzkaller.appspot.com/bug?extid=867130cb240c41f15164
compiler: clang version 11.0.0 (
https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b)
CC: [
fwei...@gmail.com linux-...@vger.kernel.org mi...@kernel.org tg...@linutronix.de]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+867130...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in tick_sched_timer / tick_sched_timer
write to 0xffffffff87f52610 of 4 bytes by interrupt on cpu 1:
tick_sched_do_timer kernel/time/tick-sched.c:141 [inline]
tick_sched_timer+0x205/0x220 kernel/time/tick-sched.c:1313
__run_hrtimer+0x154/0x4b0 kernel/time/hrtimer.c:1520
__hrtimer_run_queues kernel/time/hrtimer.c:1584 [inline]
hrtimer_interrupt+0x37c/0xa40 kernel/time/hrtimer.c:1646
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
__sysvec_apic_timer_interrupt+0xa3/0x280 arch/x86/kernel/apic/apic.c:1097
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
sysvec_apic_timer_interrupt+0xb5/0xd0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585
read to 0xffffffff87f52610 of 4 bytes by interrupt on cpu 0:
tick_sched_do_timer kernel/time/tick-sched.c:137 [inline]
tick_sched_timer+0x41/0x220 kernel/time/tick-sched.c:1313
__run_hrtimer+0x154/0x4b0 kernel/time/hrtimer.c:1520
__hrtimer_run_queues kernel/time/hrtimer.c:1584 [inline]
hrtimer_interrupt+0x37c/0xa40 kernel/time/hrtimer.c:1646
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
__sysvec_apic_timer_interrupt+0xa3/0x280 arch/x86/kernel/apic/apic.c:1097
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
sysvec_apic_timer_interrupt+0x80/0xd0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585
native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60
arch_safe_halt arch/x86/include/asm/paravirt.h:150 [inline]
acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
acpi_idle_do_entry drivers/acpi/processor_idle.c:525 [inline]
acpi_idle_enter+0x2ff/0x680 drivers/acpi/processor_idle.c:651
cpuidle_enter_state+0x245/0x5d0 drivers/cpuidle/cpuidle.c:235
cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:346
call_cpuidle kernel/sched/idle.c:126 [inline]
cpuidle_idle_call kernel/sched/idle.c:214 [inline]
do_idle+0x229/0x310 kernel/sched/idle.c:276
cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:372
rest_init+0xd8/0xe0 init/main.c:705
arch_call_rest_init+0xa/0xb
start_kernel+0x608/0x6d0 init/main.c:1043
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
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