================================================================== 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:1451 [inline] __run_timers kernel/time/timer.c:1774 [inline] __run_timers kernel/time/timer.c:1741 [inline] run_timer_softirq+0xb1c/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 __sanitizer_cov_trace_pc+0x44/0x50 kernel/kcov.c:194 skip_atoi+0x78/0x90 lib/vsprintf.c:137 format_decode+0x8a2/0xaa0 lib/vsprintf.c:2343 vsnprintf+0xd1/0xb60 lib/vsprintf.c:2526 seq_vprintf+0xa5/0xf0 fs/seq_file.c:378 seq_printf+0x6c/0x90 fs/seq_file.c:393 hugetlb_report_meminfo+0x164/0x1c0 mm/hugetlb.c:3441 meminfo_proc_show+0x7ba/0x800 fs/proc/meminfo.c:147 seq_read+0x2ef/0x940 fs/seq_file.c:206 pde_read fs/proc/inode.c:292 [inline] proc_reg_read+0x17f/0x1b0 fs/proc/inode.c:304 do_loop_readv_writev fs/read_write.c:715 [inline] do_loop_readv_writev fs/read_write.c:702 [inline] do_iter_read+0x33f/0x3a0 fs/read_write.c:936 vfs_readv+0x9c/0xf0 fs/read_write.c:1054 do_preadv+0x129/0x1c0 fs/read_write.c:1146 __do_sys_preadv fs/read_write.c:1196 [inline] __se_sys_preadv fs/read_write.c:1191 [inline] __x64_sys_preadv+0x5e/0x80 fs/read_write.c:1191 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 ==================================================================