syzbot

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BUG: KCSAN: data-race in generic_fillattr / shmem_symlink

write to 0xffff888103ff3bb0 of 8 bytes by task 3070 on cpu 1:
 inode_set_mtime_to_ts include/linux/fs.h:1587 [inline]
 shmem_symlink+0x349/0x3a0 mm/shmem.c:3540
 vfs_symlink+0xca/0x1d0 fs/namei.c:4489
 do_symlinkat+0xe3/0x350 fs/namei.c:4515
 __do_sys_symlink fs/namei.c:4536 [inline]
 __se_sys_symlink fs/namei.c:4534 [inline]
 __x64_sys_symlink+0x56/0x70 fs/namei.c:4534
 x64_sys_call+0x14d2/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:89
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888103ff3bb0 of 8 bytes by task 3156 on cpu 0:
 inode_get_mtime include/linux/fs.h:1581 [inline]
 generic_fillattr+0x1a6/0x2f0 fs/stat.c:61
 shmem_getattr+0x17b/0x200 mm/shmem.c:1139
 vfs_getattr_nosec fs/stat.c:135 [inline]
 vfs_getattr+0x19b/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+0x55/0x70 fs/stat.c:462
 x64_sys_call+0x1451/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:263
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000025ea3ce7 -> 0x000000002682d367

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3156 Comm: udevd Not tainted 6.10.0-rc5-syzkaller-00035-gafcd48134c58 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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