================================================================== BUG: KCSAN: data-race in exit_signals / task_dump_owner read-write to 0xffff888083d4a064 of 4 bytes by task 17968 on cpu 0: exit_signals+0x108/0x530 kernel/signal.c:2845 do_exit+0x158/0x15a0 kernel/exit.c:762 do_group_exit+0x16f/0x170 kernel/exit.c:903 __do_sys_exit_group+0xb/0x10 kernel/exit.c:914 __se_sys_exit_group+0x5/0x10 kernel/exit.c:912 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:912 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888083d4a064 of 4 bytes by task 17971 on cpu 1: task_dump_owner+0x2b/0x1b0 fs/proc/base.c:1821 pid_update_inode fs/proc/base.c:1963 [inline] pid_revalidate+0x69/0x110 fs/proc/base.c:1986 lookup_fast+0x208/0x370 fs/namei.c:768 walk_component+0x5c/0x350 fs/namei.c:1857 link_path_walk+0x451/0x710 fs/namei.c:2180 path_openat+0x19f/0x20a0 fs/namei.c:3365 do_filp_open+0xbd/0x1d0 fs/namei.c:3396 do_sys_openat2+0xa3/0x240 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0xe2/0x110 fs/open.c:1188 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 17971 Comm: syz-executor.2 Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================