================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_tickdevice write to 0xffff888237d1aed8 of 8 bytes by interrupt on cpu 1: 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 find_watchpoint kernel/kcsan/core.c:134 [inline] check_access kernel/kcsan/core.c:726 [inline] __tsan_read8+0x33/0x180 kernel/kcsan/core.c:1014 skb_peek include/linux/skbuff.h:2176 [inline] __skb_dequeue include/linux/skbuff.h:2482 [inline] process_backlog+0x1bd/0x3b0 net/core/dev.c:5920 __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 0xffff888237d1aed8 of 8 bytes by task 4585 on cpu 0: 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: 0x000000144ef0a7d8 -> 0x000000144f613e49 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 4585 Comm: syz-executor.3 Not tainted 5.19.0-rc6-syzkaller-00026-g5a29232d870d-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 ==================================================================