1 files changed, 6 insertions, 3 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index fa48051484b8..841cfe3be0e0 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2309,9 +2309,12 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
 					}
 				}
 
-				*offset = start;
-				free_extent_map(em);
-				break;
+				if (!test_bit(EXTENT_FLAG_PREALLOC,
+					      &em->flags)) {
+					*offset = start;
+					free_extent_map(em);
+					break;
+				}
 			}
 		}