================================================================== BUG: KCSAN: data-race in __d_instantiate / step_into write to 0xffff8881498f2cf0 of 8 bytes by task 11580 on cpu 0: __d_set_inode_and_type fs/dcache.c:344 [inline] __d_instantiate+0x1f9/0x3c0 fs/dcache.c:1853 d_instantiate_new+0x5c/0xf0 fs/dcache.c:1899 ext4_mkdir+0x5e5/0x740 fs/ext4/namei.c:3048 vfs_mkdir+0x1ef/0x2f0 fs/namei.c:4122 do_mkdirat+0x12f/0x2a0 fs/namei.c:4145 __do_sys_mkdir fs/namei.c:4165 [inline] __se_sys_mkdir fs/namei.c:4163 [inline] __x64_sys_mkdir+0x44/0x50 fs/namei.c:4163 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff8881498f2cf0 of 8 bytes by task 11583 on cpu 1: step_into+0x123/0x800 fs/namei.c:1843 walk_component+0x164/0x230 fs/namei.c:2007 lookup_last fs/namei.c:2458 [inline] path_lookupat+0x10a/0x2a0 fs/namei.c:2482 filename_lookup+0x126/0x300 fs/namei.c:2511 user_path_at_empty+0x42/0x120 fs/namei.c:2920 user_path_at include/linux/namei.h:57 [inline] do_mount fs/namespace.c:3689 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x24b/0x2d0 fs/namespace.c:3875 __x64_sys_mount+0x67/0x80 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x0000000000000000 -> 0xffff8881007f17f8 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 11583 Comm: syz-executor.1 Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ================================================================== loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Unrecognized mount option ">°ÿ| " or missing value