================================================================== BUG: KCSAN: data-race in __d_lookup_rcu / __d_rehash read to 0xffff8881013da610 of 8 bytes by task 25063 on cpu 1: hlist_bl_unhashed include/linux/list_bl.h:54 [inline] d_unhashed include/linux/dcache.h:342 [inline] __d_lookup_rcu+0x13f/0x3e0 fs/dcache.c:2322 lookup_fast+0xc1/0x360 fs/namei.c:1580 walk_component+0x6d/0x360 fs/namei.c:1966 link_path_walk+0x56b/0x930 path_openat+0x1a7/0x1eb0 fs/namei.c:3555 do_filp_open+0x105/0x220 fs/namei.c:3586 do_sys_openat2+0xb5/0x2b0 fs/open.c:1212 do_sys_open fs/open.c:1228 [inline] __do_sys_openat fs/open.c:1244 [inline] __se_sys_openat fs/open.c:1239 [inline] __x64_sys_openat+0xef/0x110 fs/open.c:1239 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae write to 0xffff8881013da610 of 8 bytes by task 25062 on cpu 0: hlist_bl_add_head_rcu include/linux/rculist_bl.h:81 [inline] __d_rehash+0xb9/0x1f0 fs/dcache.c:2519 __d_add+0x345/0x450 fs/dcache.c:2713 d_splice_alias+0xd9/0x460 fs/dcache.c:3100 proc_pid_instantiate+0xfe/0x120 fs/proc/base.c:3366 proc_pid_lookup+0x123/0x1c0 fs/proc/base.c:3397 proc_root_lookup+0x1b/0x40 fs/proc/root.c:322 __lookup_slow+0x182/0x250 fs/namei.c:1657 lookup_slow fs/namei.c:1674 [inline] walk_component+0x2b6/0x360 fs/namei.c:1970 link_path_walk+0x56b/0x930 path_openat+0x1a7/0x1eb0 fs/namei.c:3555 do_filp_open+0x105/0x220 fs/namei.c:3586 do_sys_openat2+0xb5/0x2b0 fs/open.c:1212 do_sys_open fs/open.c:1228 [inline] __do_sys_openat fs/open.c:1244 [inline] __se_sys_openat fs/open.c:1239 [inline] __x64_sys_openat+0xef/0x110 fs/open.c:1239 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 25062 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================