==================================================================
BUG: KCSAN: data-race in d_delete / lookup_fast

read-write to 0xffff88810820c000 of 4 bytes by task 3302 on cpu 1:
 d_delete+0x6c/0xf0 fs/dcache.c:2563
 d_delete_notify+0x30/0xe0 include/linux/fsnotify.h:260
 vfs_unlink+0x305/0x3e0 fs/namei.c:4333
 do_unlinkat+0x236/0x4c0 fs/namei.c:4382
 __do_sys_unlink fs/namei.c:4430 [inline]
 __se_sys_unlink fs/namei.c:4428 [inline]
 __x64_sys_unlink+0x30/0x40 fs/namei.c:4428
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88810820c000 of 4 bytes by task 2778 on cpu 0:
 d_revalidate fs/namei.c:861 [inline]
 lookup_fast+0xd9/0x290 fs/namei.c:1643
 walk_component+0x3f/0x230 fs/namei.c:1998
 lookup_last fs/namei.c:2459 [inline]
 path_lookupat+0x10a/0x2a0 fs/namei.c:2483
 filename_lookup+0x126/0x300 fs/namei.c:2512
 user_path_at_empty+0x42/0x110 fs/namei.c:2911
 do_readlinkat+0x92/0x210 fs/stat.c:494
 __do_sys_readlink fs/stat.c:527 [inline]
 __se_sys_readlink fs/stat.c:524 [inline]
 __x64_sys_readlink+0x47/0x50 fs/stat.c:524
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00600108 -> 0x00008008

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2778 Comm: udevd Not tainted 6.7.0-rc2-syzkaller-00195-g0f5cc96c367f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
==================================================================
I/O error, dev loop5, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev loop5, logical block 0, async page read
 loop5: unable to read partition table
loop5: partition table beyond EOD, truncated
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev loop3, logical block 0, async page read
 loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev loop3, logical block 0, async page read
 loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev loop3, logical block 0, async page read
 loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
Alternate GPT is invalid, using primary GPT.
 loop5: p2 p3 p7
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev loop3, logical block 0, async page read
 loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
Alternate GPT is invalid, using primary GPT.
 loop5: p2 p3 p7
blk_print_req_error: 1 callbacks suppressed
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev loop3, logical block 0, async page read
 loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
Alternate GPT is invalid, using primary GPT.
 loop5: p2 p3 p7
Alternate GPT is invalid, using primary GPT.
 loop5: p2 p3 p7
Alternate GPT is invalid, using primary GPT.
 loop5: p2 p3 p7
Alternate GPT is invalid, using primary GPT.
 loop5: p2 p3 p7
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev loop3, logical block 0, async page read
 loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
Alternate GPT is invalid, using primary GPT.
 loop5: p2 p3 p7
Alternate GPT is invalid, using primary GPT.
 loop5: p2 p3 p7