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

write to 0xffff888103f98108 of 8 bytes by task 2385 on cpu 1:
 shmem_symlink+0x2e4/0x390 mm/shmem.c:3055
 vfs_symlink+0x18a/0x280 fs/namei.c:4249
 do_symlinkat+0x104/0x380 fs/namei.c:4278
 __do_sys_symlink fs/namei.c:4300 [inline]
 __se_sys_symlink fs/namei.c:4298 [inline]
 __x64_sys_symlink+0x52/0x60 fs/namei.c:4298
 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 0xffff888103f98108 of 8 bytes by task 2381 on cpu 0:
 i_size_read include/linux/fs.h:892 [inline]
 generic_fillattr+0x203/0x2b0 fs/stat.c:53
 vfs_getattr_nosec fs/stat.c:126 [inline]
 vfs_getattr fs/stat.c:160 [inline]
 vfs_statx+0x265/0x3c0 fs/stat.c:225
 vfs_fstatat fs/stat.c:243 [inline]
 __do_sys_newfstatat fs/stat.c:412 [inline]
 __se_sys_newfstatat+0x63/0x260 fs/stat.c:406
 __x64_sys_newfstatat+0x51/0x60 fs/stat.c:406
 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: 0x00000000000000a0 -> 0x00000000000000b4

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2381 Comm: udevd Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
I/O error, dev loop5, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
buffer_io_error: 67 callbacks suppressed
Buffer I/O error on dev loop5, logical block 1, async page read
I/O error, dev loop5, sector 2 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop5, logical block 2, async page read
Buffer I/O error on dev loop0, logical block 1, async page read
Buffer I/O error on dev loop0, logical block 2, async page read