================================================================== BUG: KCSAN: data-race in dentry_lru_isolate_shrink / lookup_fast write to 0xffff8881013bab40 of 4 bytes by task 3959 on cpu 1: d_lru_shrink_move fs/dcache.c:455 [inline] dentry_lru_isolate_shrink+0x7b/0x100 fs/dcache.c:1275 __list_lru_walk_one+0xfb/0x320 mm/list_lru.c:231 list_lru_walk_node+0x116/0x1a0 mm/list_lru.c:311 list_lru_walk include/linux/list_lru.h:215 [inline] shrink_dcache_sb+0xc8/0x2d0 fs/dcache.c:1294 reconfigure_super+0x146/0x540 fs/super.c:891 do_remount fs/namespace.c:2650 [inline] path_mount+0x13f9/0x1c40 fs/namespace.c:3310 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3516 __x64_sys_mount+0x63/0x70 fs/namespace.c:3516 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 read to 0xffff8881013bab40 of 4 bytes by task 1815 on cpu 0: d_revalidate fs/namei.c:853 [inline] lookup_fast+0x172/0x360 fs/namei.c:1606 walk_component+0x6d/0x360 fs/namei.c:1966 lookup_last fs/namei.c:2425 [inline] path_lookupat+0x12d/0x3d0 fs/namei.c:2449 filename_lookup+0x130/0x310 fs/namei.c:2478 user_path_at_empty+0x3e/0x110 fs/namei.c:2801 user_path_at include/linux/namei.h:57 [inline] ksys_umount fs/namespace.c:1773 [inline] __do_sys_umount fs/namespace.c:1781 [inline] __se_sys_umount fs/namespace.c:1779 [inline] __x64_sys_umount+0x84/0xe0 fs/namespace.c:1779 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 value changed: 0x00280040 -> 0x00008040 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1815 Comm: syz-executor.0 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================