================================================================== BUG: KCSAN: data-race in do_nanosleep / prepare_signal write to 0xffff88812656b064 of 4 bytes by task 15053 on cpu 0: freezer_do_not_count include/linux/freezer.h:109 [inline] freezable_schedule include/linux/freezer.h:171 [inline] do_nanosleep+0xff/0x3a0 kernel/time/hrtimer.c:1879 hrtimer_nanosleep kernel/time/hrtimer.c:1932 [inline] __do_sys_nanosleep kernel/time/hrtimer.c:1966 [inline] __se_sys_nanosleep+0x20b/0x2a0 kernel/time/hrtimer.c:1953 __x64_sys_nanosleep+0x2d/0x40 kernel/time/hrtimer.c:1953 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812656b064 of 4 bytes by interrupt on cpu 1: sig_task_ignored kernel/signal.c:94 [inline] sig_ignored kernel/signal.c:119 [inline] prepare_signal+0x88d/0xdb0 kernel/signal.c:961 send_sigqueue+0xea/0x450 kernel/signal.c:1860 posix_timer_event kernel/time/posix-timers.c:354 [inline] posix_timer_fn+0xe8/0x210 kernel/time/posix-timers.c:380 __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:592 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15068 Comm: syz-executor.0 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================