================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_tickdevice write to 0xffff888237c1aed8 of 8 bytes by interrupt on cpu 0: hrtimer_interrupt+0xa7/0xa70 kernel/time/hrtimer.c:1790 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0xa3/0x250 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x88/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1b/0x20 kcsan_setup_watchpoint+0x3e9/0x3f0 kernel/kcsan/core.c:694 __netif_receive_skb_one_core net/core/dev.c:5480 [inline] __netif_receive_skb+0x7b/0x1b0 net/core/dev.c:5594 process_backlog+0x23f/0x3b0 net/core/dev.c:5922 __napi_poll+0x65/0x390 net/core/dev.c:6488 napi_poll net/core/dev.c:6555 [inline] net_rx_action+0x37e/0x730 net/core/dev.c:6666 __do_softirq+0x158/0x2e3 kernel/softirq.c:571 run_ksoftirqd+0x1f/0x30 kernel/softirq.c:934 smpboot_thread_fn+0x308/0x4a0 kernel/smpboot.c:164 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 read to 0xffff888237c1aed8 of 8 bytes by task 6506 on cpu 1: print_tickdevice+0x158/0x370 kernel/time/timer_list.c:204 timer_list_show+0x74/0x180 kernel/time/timer_list.c:296 seq_read_iter+0x676/0x8e0 fs/seq_file.c:272 proc_reg_read_iter+0xfa/0x170 fs/proc/inode.c:300 call_read_iter include/linux/fs.h:2052 [inline] generic_file_splice_read+0x1de/0x2c0 fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2ac/0x660 fs/splice.c:870 do_splice_direct+0xfb/0x180 fs/splice.c:979 do_sendfile+0x3ad/0x900 fs/read_write.c:1262 __do_sys_sendfile64 fs/read_write.c:1327 [inline] __se_sys_sendfile64 fs/read_write.c:1313 [inline] __x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1313 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 value changed: 0x000000d1cd1813f6 -> 0x000000d1cdafef10 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 6506 Comm: syz-executor.1 Not tainted 5.19.0-rc4-syzkaller-00044-g1a0e93df1e10-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2022 ==================================================================