================================================================== BUG: KCSAN: data-race in run_timer_softirq / try_to_del_timer_sync write to 0xffff88812c11dc88 of 8 bytes by interrupt on cpu 1: expire_timers kernel/time/timer.c:1446 [inline] __run_timers kernel/time/timer.c:1774 [inline] __run_timers kernel/time/timer.c:1741 [inline] run_timer_softirq+0x440/0xbd0 kernel/time/timer.c:1787 __do_softirq+0x118/0x34a kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xb5/0xd0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0xe2/0x270 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 arch_local_irq_enable arch/x86/include/asm/paravirt.h:769 [inline] preempt_schedule_irq+0x49/0x80 kernel/sched/core.c:4345 restore_regs_and_return_to_kernel+0x0/0x25 arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline] kcsan_setup_watchpoint+0x25a/0x440 kernel/kcsan/core.c:542 audit_context include/linux/audit.h:290 [inline] audit_dummy_context include/linux/audit.h:295 [inline] audit_getname include/linux/audit.h:327 [inline] getname_flags fs/namei.c:202 [inline] getname_flags+0x15e/0x380 fs/namei.c:128 getname fs/namei.c:209 [inline] do_renameat2+0x14a/0xa50 fs/namei.c:4362 __do_sys_rename fs/namei.c:4483 [inline] __se_sys_rename fs/namei.c:4481 [inline] __x64_sys_rename+0x44/0x60 fs/namei.c:4481 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812c11dc88 of 8 bytes by task 10 on cpu 0: try_to_del_timer_sync+0x40/0xb0 kernel/time/timer.c:1226 del_timer_sync+0x68/0xa0 kernel/time/timer.c:1366 schedule_timeout+0x106/0x280 kernel/time/timer.c:1899 rcu_gp_fqs_loop+0x34c/0x540 kernel/rcu/tree.c:1674 rcu_gp_kthread+0x113/0x1e0 kernel/rcu/tree.c:1836 kthread+0x203/0x230 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10 Comm: rcu_preempt Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================