================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu write to 0xffff88812c01fce0 of 8 bytes by interrupt on cpu 0: hrtimer_interrupt+0x243/0x480 kernel/time/hrtimer.c:1649 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline] smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1144 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 get_current arch/x86/include/asm/current.h:15 [inline] __sanitizer_cov_trace_pc+0xd/0x50 kernel/kcov.c:186 format_decode+0x5a/0xb10 lib/vsprintf.c:2298 vsnprintf+0xc9/0xb40 lib/vsprintf.c:2526 seq_vprintf+0xaa/0xf0 fs/seq_file.c:403 seq_printf+0x6c/0x90 fs/seq_file.c:418 proc_keys_show+0x5d2/0x7f0 security/keys/proc.c:224 seq_read+0x350/0x9d0 fs/seq_file.c:229 proc_reg_read+0xe9/0x140 fs/proc/inode.c:223 do_loop_readv_writev fs/read_write.c:714 [inline] do_loop_readv_writev fs/read_write.c:701 [inline] do_iter_read+0x357/0x3d0 fs/read_write.c:935 vfs_readv+0x9c/0xf0 fs/read_write.c:1053 do_preadv+0x131/0x1d0 fs/read_write.c:1145 __do_sys_preadv fs/read_write.c:1195 [inline] __se_sys_preadv fs/read_write.c:1190 [inline] __x64_sys_preadv+0x61/0x80 fs/read_write.c:1190 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812c01fce0 of 8 bytes by task 12750 on cpu 1: print_cpu+0x221/0x650 kernel/time/timer_list.c:148 timer_list_show+0xbb/0x140 kernel/time/timer_list.c:311 traverse fs/seq_file.c:113 [inline] traverse+0x10a/0x410 fs/seq_file.c:91 seq_read+0x673/0x9d0 fs/seq_file.c:188 proc_reg_read+0xe9/0x140 fs/proc/inode.c:223 do_loop_readv_writev fs/read_write.c:714 [inline] do_loop_readv_writev fs/read_write.c:701 [inline] do_iter_read+0x357/0x3d0 fs/read_write.c:935 vfs_readv+0x9c/0xf0 fs/read_write.c:1053 do_preadv+0x131/0x1d0 fs/read_write.c:1145 __do_sys_preadv fs/read_write.c:1195 [inline] __se_sys_preadv fs/read_write.c:1190 [inline] __x64_sys_preadv+0x61/0x80 fs/read_write.c:1190 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 12750 Comm: syz-executor.4 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================