==================================================================
BUG: KCSAN: data-race in tick_nohz_stop_tick / tick_sched_timer

write to 0xffffffff85ebdfe0 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick+0xa5/0x420 kernel/time/tick-sched.c:873
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1062 [inline]
 tick_nohz_idle_stop_tick+0xf2/0x1c0 kernel/time/tick-sched.c:1083
 cpuidle_idle_call kernel/sched/idle.c:235 [inline]
 do_idle+0x195/0x250 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 secondary_startup_64_no_verify+0xb1/0xbb

read to 0xffffffff85ebdfe0 of 4 bytes by interrupt on cpu 0:
 tick_sched_do_timer kernel/time/tick-sched.c:187 [inline]
 tick_sched_timer+0x41/0x220 kernel/time/tick-sched.c:1414
 __run_hrtimer+0x163/0x460 kernel/time/hrtimer.c:1685
 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline]
 hrtimer_interrupt+0x37e/0xac0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0xa3/0x240 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x88/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 kcsan_setup_watchpoint+0x94/0x420 kernel/kcsan/core.c:443
 avc_search_node security/selinux/avc.c:537 [inline]
 avc_lookup security/selinux/avc.c:567 [inline]
 avc_has_perm_noaudit+0xc8/0x270 security/selinux/avc.c:1152
 selinux_inode_permission+0x2da/0x3f0 security/selinux/hooks.c:3191
 security_inode_permission+0x72/0xc0 security/security.c:1314
 inode_permission fs/namei.c:532 [inline]
 may_lookup fs/namei.c:1683 [inline]
 link_path_walk+0x1e4/0x930 fs/namei.c:2239
 path_parentat fs/namei.c:2496 [inline]
 filename_parentat+0x123/0x480 fs/namei.c:2519
 do_unlinkat+0x83/0x540 fs/namei.c:4138
 __do_sys_unlink fs/namei.c:4215 [inline]
 __se_sys_unlink fs/namei.c:4213 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4213
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000001 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1438 Comm: udevd Tainted: G        W         5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================