==================================================================
BUG: KCSAN: data-race in generic_fillattr / shmem_unlink

read-write to 0xffff8881045b89a0 of 8 bytes by task 4997 on cpu 1:
 shmem_unlink+0x108/0x180 mm/shmem.c:3366
 shmem_rename2+0x1dc/0x2c0 mm/shmem.c:3449
 vfs_rename+0x867/0x9c0 fs/namei.c:4883
 do_renameat2+0x732/0xa60 fs/namei.c:5040
 __do_sys_rename fs/namei.c:5087 [inline]
 __se_sys_rename fs/namei.c:5085 [inline]
 __x64_sys_rename+0x5c/0x70 fs/namei.c:5085
 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 0xffff8881045b89a0 of 8 bytes by task 3172 on cpu 0:
 i_size_read include/linux/fs.h:912 [inline]
 generic_fillattr+0x144/0x2f0 fs/stat.c:59
 shmem_getattr+0x17b/0x200 mm/shmem.c:1139
 vfs_getattr_nosec fs/stat.c:135 [inline]
 vfs_getattr+0x198/0x1e0 fs/stat.c:176
 vfs_statx+0x140/0x320 fs/stat.c:248
 vfs_fstatat+0xcd/0x100 fs/stat.c:304
 __do_sys_newfstatat fs/stat.c:468 [inline]
 __se_sys_newfstatat+0x58/0x260 fs/stat.c:462
 __x64_sys_newfstatat+0x55/0x60 fs/stat.c:462
 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: 0x000000000000166c -> 0x0000000000001658

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3172 Comm: udevd Not tainted 6.8.0-rc7-syzkaller-00231-g09e5c48fea17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
==================================================================
I/O error, dev loop4, sector 608 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
Buffer I/O error on dev loop0p3, logical block 8, async page read
Buffer I/O error on dev loop0p3, logical block 9, async page read
Buffer I/O error on dev loop0p3, logical block 10, async page read
Buffer I/O error on dev loop0p3, logical block 11, async page read
udevd[3172]: inotify_add_watch(7, /dev/loop4p7, 10) failed: No such file or directory
udevd[3172]: inotify_add_watch(7, /dev/loop4p2, 10) failed: No such file or directory
blk_print_req_error: 97 callbacks suppressed
I/O error, dev loop4, sector 208 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop4, sector 208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
I/O error, dev loop4, sector 209 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
I/O error, dev loop4, sector 210 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
I/O error, dev loop0, sector 208 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
I/O error, dev loop0, sector 208 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
buffer_io_error: 32 callbacks suppressed
Buffer I/O error on dev loop0p3, logical block 8, async page read
Buffer I/O error on dev loop0p3, logical block 9, async page read
udevd[3172]: inotify_add_watch(7, /dev/loop0p3, 10) failed: No such file or directory
Buffer I/O error on dev loop4p3, logical block 8, async page read