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BUG: KCSAN: data-race in file_remove_privs / new_sync_write

write to 0xffff88806208a344 of 4 bytes by task 26914 on cpu 1:
 inode_has_no_xattr include/linux/fs.h:3561 [inline]
 file_remove_privs+0x1c9/0x2a0 fs/inode.c:1862
 __generic_file_write_iter+0xc4/0x370 mm/filemap.c:3362
 generic_file_write_iter+0x294/0x38e mm/filemap.c:3448
 call_write_iter include/linux/fs.h:1901 [inline]
 new_sync_write+0x303/0x400 fs/read_write.c:483
 __vfs_write+0x9e/0xb0 fs/read_write.c:496
 vfs_write fs/read_write.c:558 [inline]
 vfs_write+0x189/0x380 fs/read_write.c:542
 ksys_pwrite64+0xe4/0x110 fs/read_write.c:665
 __do_sys_pwrite64 fs/read_write.c:675 [inline]
 __se_sys_pwrite64 fs/read_write.c:672 [inline]
 __x64_sys_pwrite64+0x5b/0x70 fs/read_write.c:672
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88806208a344 of 4 bytes by task 26476 on cpu 0:
 io_is_direct include/linux/fs.h:3391 [inline]
 iocb_flags include/linux/fs.h:3418 [inline]
 init_sync_kiocb include/linux/fs.h:2074 [inline]
 new_sync_write+0xd6/0x400 fs/read_write.c:479
 __vfs_write+0x9e/0xb0 fs/read_write.c:496
 vfs_write fs/read_write.c:558 [inline]
 vfs_write+0x189/0x380 fs/read_write.c:542
 ksys_pwrite64+0xe4/0x110 fs/read_write.c:665
 __do_sys_pwrite64 fs/read_write.c:675 [inline]
 __se_sys_pwrite64 fs/read_write.c:672 [inline]
 __x64_sys_pwrite64+0x5b/0x70 fs/read_write.c:672
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 26476 Comm: syz-executor.0 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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