================================================================== BUG: KCSAN: data-race in ktime_get_real_seconds / timekeeping_advance write to 0xffffffff86040b08 of 280 bytes by interrupt on cpu 1: timekeeping_advance+0x893/0xd80 include/linux/string.h:378 update_wall_time+0x19/0x20 kernel/time/timekeeping.c:2137 tick_do_update_jiffies64+0x1ae/0x260 kernel/time/tick-sched.c:94 tick_sched_do_timer+0xd4/0xe0 kernel/time/tick-sched.c:138 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1292 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1638 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 smap_restore kernel/kcsan/core.c:426 [inline] __kcsan_setup_watchpoint+0x270/0x4a0 kernel/kcsan/core.c:426 __tsan_read1 kernel/kcsan/kcsan.c:33 [inline] __tsan_read1+0x2c/0x30 kernel/kcsan/kcsan.c:33 tomoyo_check_path_acl+0x3a/0xa0 security/tomoyo/file.c:258 tomoyo_check_acl+0xf6/0x270 security/tomoyo/domain.c:172 tomoyo_path_permission security/tomoyo/file.c:586 [inline] tomoyo_path_permission+0xe3/0x160 security/tomoyo/file.c:573 read to 0xffffffff86040b78 of 8 bytes by task 7281 on cpu 0: ktime_get_real_seconds+0x20/0x40 kernel/time/timekeeping.c:127 recently_deleted fs/ext4/ialloc.c:699 [inline] find_inode_bit.isra.0+0x1e2/0x300 fs/ext4/ialloc.c:722 __ext4_new_inode+0xd4b/0x3070 fs/ext4/ialloc.c:914 ext4_mkdir+0x289/0x820 fs/ext4/namei.c:2763 vfs_mkdir+0x283/0x390 fs/namei.c:3807 do_mkdirat+0x1ac/0x1f0 fs/namei.c:3830 __do_sys_mkdir fs/namei.c:3846 [inline] __se_sys_mkdir fs/namei.c:3844 [inline] __x64_sys_mkdir+0x40/0x50 fs/namei.c:3844 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7281 Comm: syz-executor.4 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================