loop4: detected capacity change from 0 to 4 ================================================================== BUG: KCSAN: data-race in __dentry_kill / d_set_d_op write to 0xffff88811b09c480 of 4 bytes by task 29920 on cpu 0: d_set_d_op+0x17f/0x220 fs/dcache.c:1910 simple_lookup+0x78/0x90 fs/libfs.c:74 __lookup_slow+0x182/0x250 fs/namei.c:1657 lookup_slow fs/namei.c:1674 [inline] walk_component+0x2b6/0x360 fs/namei.c:1970 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] vfs_statx+0xa9/0x2a0 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] vfs_stat include/linux/fs.h:3353 [inline] __do_sys_newstat fs/stat.c:385 [inline] __se_sys_newstat+0x5d/0x250 fs/stat.c:381 __x64_sys_newstat+0x2d/0x40 fs/stat.c:381 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 0xffff88811b09c480 of 4 bytes by task 29918 on cpu 1: dentry_unlist fs/dcache.c:547 [inline] __dentry_kill+0x1ef/0x450 fs/dcache.c:578 dput+0x218/0x430 fs/dcache.c:888 handle_mounts fs/namei.c:1502 [inline] step_into+0x468/0xee0 fs/namei.c:1800 walk_component+0x1a1/0x360 fs/namei.c:1976 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] vfs_statx+0xa9/0x2a0 fs/stat.c:221 vfs_fstatat fs/stat.c:243 [inline] vfs_stat include/linux/fs.h:3353 [inline] __do_sys_newstat fs/stat.c:385 [inline] __se_sys_newstat+0x5d/0x250 fs/stat.c:381 __x64_sys_newstat+0x2d/0x40 fs/stat.c:381 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: 0x10000000 -> 0x00000008 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 29918 Comm: syz-executor.4 Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================