KCSAN: data-race in __remove_hrtimer / hrtimer

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __remove_hrtimer / hrtimer_active (3) kernel				2	1955d	1959d	0/28	auto-closed as invalid on 2020/02/20 07:07
upstream	KCSAN: data-race in __remove_hrtimer / hrtimer_active (2) kernel				1	1989d	1989d	0/28	closed as invalid on 2019/11/19 14:04

================================================================== BUG: KCSAN: data-race in __remove_hrtimer / hrtimer_active read to 0xffffc9000163fc88 of 1 bytes by task 7189 on cpu 1: hrtimer_active+0x5e/0x1a0 kernel/time/hrtimer.c:1320 hrtimer_try_to_cancel+0x3c/0x260 kernel/time/hrtimer.c:1135 hrtimer_cancel+0x29/0x50 kernel/time/hrtimer.c:1161 futex_wait+0x38b/0x400 kernel/futex.c:2769 do_futex+0xe9/0x18b0 kernel/futex.c:3646 __do_sys_futex kernel/futex.c:3707 [inline] __se_sys_futex kernel/futex.c:3675 [inline] __x64_sys_futex+0x2cd/0x3f0 kernel/futex.c:3675 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffffc9000163fc88 of 1 bytes by interrupt on cpu 0: __remove_hrtimer+0x52/0x130 kernel/time/hrtimer.c:970 __run_hrtimer kernel/time/hrtimer.c:1371 [inline] __hrtimer_run_queues+0x250/0x600 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: 7204 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: 7204 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: <IRQ> __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_write1 kernel/kcsan/kcsan.c:28 [inline] __tsan_write1+0x32/0x40 kernel/kcsan/kcsan.c:28 __remove_hrtimer+0x52/0x130 kernel/time/hrtimer.c:970 __run_hrtimer kernel/time/hrtimer.c:1371 [inline] __hrtimer_run_queues+0x250/0x600 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 </IRQ> RIP: 0033:0x40ac38 Code: 4d 89 c8 eb de 49 89 d2 4a 8d 54 8a 08 8b 12 44 8b 5c 24 58 44 39 da 74 05 4c 89 d2 eb c5 0f b6 46 52 4c 0f af c8 0f b6 43 08 <4b> 8d 4c 11 28 a8 04 0f 84 da 01 00 00 83 e0 fb 88 43 08 48 89 4c RSP: 002b:000000c4204e18d8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000004 RBX: 000000c42098d200 RCX: 000000c4209db6f0 RDX: 00000000a8d1a69e RSI: 00000000008630e0 RDI: 0000000000000100 RBP: 000000c4204e1910 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c4209db6e8 R11: 0000000000000680 R12: 0000000000000180 R13: 0000000000000018 R14: 0000000000000057 R15: 0000000000000100 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..