================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu write to 0xffff888237c1d794 of 4 bytes by interrupt on cpu 0: hrtimer_interrupt+0x89/0xaf0 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x6f/0x1c0 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x64/0x80 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 __sanitizer_cov_trace_switch+0x71/0x100 kernel/kcov.c:320 format_decode+0x192/0x8a0 lib/vsprintf.c:2503 vsnprintf+0xcd/0xed0 lib/vsprintf.c:2704 seq_vprintf+0x71/0xd0 fs/seq_file.c:395 SEQ_printf+0x76/0xb0 kernel/time/timer_list.c:38 print_cpu+0x59b/0x690 kernel/time/timer_list.c:161 timer_list_show+0x114/0x180 kernel/time/timer_list.c:283 seq_read_iter+0x60b/0x910 fs/seq_file.c:269 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:300 call_read_iter include/linux/fs.h:2108 [inline] generic_file_splice_read+0x22a/0x310 fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870 do_splice_direct+0xf5/0x170 fs/splice.c:979 do_sendfile+0x773/0xda0 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888237c1d794 of 4 bytes by task 32450 on cpu 1: print_cpu+0x37f/0x690 kernel/time/timer_list.c:135 timer_list_show+0x114/0x180 kernel/time/timer_list.c:283 seq_read_iter+0x60b/0x910 fs/seq_file.c:269 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:300 call_read_iter include/linux/fs.h:2108 [inline] generic_file_splice_read+0x22a/0x310 fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870 do_splice_direct+0xf5/0x170 fs/splice.c:979 do_sendfile+0x773/0xda0 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x001212bb -> 0x001212bc Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 32450 Comm: syz-executor.0 Tainted: G W 5.13.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================