syzbot

 loop4: p1 < > p4
loop4: p4 size 8388608 extends beyond EOD, truncated
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BUG: KCSAN: data-race in generic_fillattr / setattr_copy

write to 0xffff8881189e3540 of 4 bytes by task 3290 on cpu 0:
 inode_set_atime_to_ts include/linux/fs.h:1674 [inline]
 setattr_copy+0x249/0x4a0 fs/attr.c:359
 shmem_setattr+0x532/0x830 mm/shmem.c:1330
 notify_change+0x85c/0x8e0 fs/attr.c:552
 vfs_utimes+0x2c6/0x3e0 fs/utimes.c:66
 do_utimes_path fs/utimes.c:99 [inline]
 do_utimes+0x149/0x1f0 fs/utimes.c:140
 __do_sys_utimensat fs/utimes.c:159 [inline]
 __se_sys_utimensat fs/utimes.c:143 [inline]
 __x64_sys_utimensat+0xc6/0x170 fs/utimes.c:143
 x64_sys_call+0x272a/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:281
 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 0xffff8881189e3540 of 4 bytes by task 3660 on cpu 1:
 inode_get_atime_nsec include/linux/fs.h:1659 [inline]
 inode_get_atime include/linux/fs.h:1665 [inline]
 generic_fillattr+0x16f/0x330 fs/stat.c:96
 shmem_getattr+0x17b/0x200 mm/shmem.c:1249
 vfs_getattr_nosec fs/stat.c:208 [inline]
 vfs_getattr fs/stat.c:246 [inline]
 vfs_statx_path+0x178/0x2f0 fs/stat.c:283
 vfs_statx+0xe1/0x170 fs/stat.c:349
 vfs_fstatat fs/stat.c:368 [inline]
 __do_sys_newfstatat fs/stat.c:532 [inline]
 __se_sys_newfstatat+0xdc/0x300 fs/stat.c:526
 __x64_sys_newfstatat+0x55/0x70 fs/stat.c:526
 x64_sys_call+0x236d/0x2dc0 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: 0x37a27db0 -> 0x37d703c1

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3660 Comm: syz.4.60 Not tainted 6.14.0-rc1-syzkaller-00276-g69b54314c975 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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