syzbot

==================================================================
BUG: KCSAN: data-race in file_remove_privs / vfs_write

write to 0xffff888108ae085c of 4 bytes by task 25428 on cpu 1:
 inode_has_no_xattr include/linux/fs.h:3653 [inline]
 file_remove_privs+0x312/0x3a0 fs/inode.c:1954
 __generic_file_write_iter+0xdd/0x300 mm/filemap.c:3735
 generic_file_write_iter+0x75/0x130 mm/filemap.c:3821
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x69d/0x770 fs/read_write.c:605
 ksys_pwrite64 fs/read_write.c:712 [inline]
 __do_sys_pwrite64 fs/read_write.c:722 [inline]
 __se_sys_pwrite64 fs/read_write.c:719 [inline]
 __x64_sys_pwrite64+0xf5/0x150 fs/read_write.c:719
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888108ae085c of 4 bytes by task 25364 on cpu 0:
 iocb_flags include/linux/fs.h:3507 [inline]
 init_sync_kiocb include/linux/fs.h:2281 [inline]
 new_sync_write fs/read_write.c:514 [inline]
 vfs_write+0x37c/0x770 fs/read_write.c:605
 ksys_pwrite64 fs/read_write.c:712 [inline]
 __do_sys_pwrite64 fs/read_write.c:722 [inline]
 __se_sys_pwrite64 fs/read_write.c:719 [inline]
 __x64_sys_pwrite64+0xf5/0x150 fs/read_write.c:719
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000000 -> 0x00001000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25364 Comm: syz-executor.3 Not tainted 5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================