fs/dax: Reject IOCB_ATOMIC in dax_iomap_rw()

The DAX write path does not support IOCB_ATOMIC, so reject it when set. Suggested-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: John Garry <john.g.garry@oracle.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Carlos Maiolino <cem@kernel.org>
2025-08-11 14:03:38 +02:00
parent 82efde9cf2
commit e7fb9b7132
1 changed files with 3 additions and 0 deletions
@@ -1743,6 +1743,9 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
 	loff_t done = 0;
 	int ret;

+	if (WARN_ON_ONCE(iocb->ki_flags & IOCB_ATOMIC))
+		return -EIO;
+
 	if (!iomi.len)
 		return 0;