================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_tickdevice write to 0xffff888237d1c218 of 8 bytes by interrupt on cpu 1: hrtimer_interrupt+0x80/0x4a0 kernel/time/hrtimer.c:1906 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:94 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x3d/0x60 kernel/locking/spinlock.c:194 unlock_hrtimer_base kernel/time/hrtimer.c:1032 [inline] hrtimer_start_range_ns+0x6ca/0x720 kernel/time/hrtimer.c:1346 qdisc_watchdog_schedule_range_ns+0xd8/0xf0 net/sched/sch_api.c:657 qdisc_watchdog_schedule_ns include/net/pkt_sched.h:81 [inline] tbf_dequeue+0x3e6/0x5c0 net/sched/sch_tbf.c:316 dequeue_skb net/sched/sch_generic.c:293 [inline] qdisc_restart net/sched/sch_generic.c:398 [inline] __qdisc_run+0x1a5/0x1130 net/sched/sch_generic.c:416 qdisc_run+0xcc/0x2c0 include/net/pkt_sched.h:127 net_tx_action+0x2f7/0x370 net/core/dev.c:5484 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:950 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 kthread+0x4ae/0x520 kernel/kthread.c:464 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffff888237d1c218 of 8 bytes by task 9867 on cpu 0: print_tickdevice+0x144/0x340 kernel/time/timer_list.c:208 timer_list_show+0x79/0x180 kernel/time/timer_list.c:300 seq_read_iter+0x2d1/0x930 fs/seq_file.c:230 proc_reg_read_iter+0x118/0x190 fs/proc/inode.c:299 copy_splice_read+0x383/0x5b0 fs/splice.c:365 do_splice_read fs/splice.c:985 [inline] splice_direct_to_actor+0x269/0x670 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0xd7/0x150 fs/splice.c:1233 do_sendfile+0x398/0x660 fs/read_write.c:1363 __do_sys_sendfile64 fs/read_write.c:1424 [inline] __se_sys_sendfile64 fs/read_write.c:1410 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1410 x64_sys_call+0xfbd/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x000000cd06ad1e9a -> 0x000000cd06dabf9e Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 9867 Comm: syz.2.13900 Not tainted 6.14.0-rc2-syzkaller-00303-gad1b832bf1cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 ==================================================================