Re: [syzbot] [ext4?] INFO: task hung in filename_unlinkat

[Edward Adam Davis]

#syz test

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index ae3804f36535..0bed3379f2d2 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4458,19 +4458,13 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
 	if (IS_ERR(path)) {
 		err = PTR_ERR(path);
 		if (allocated_clusters) {
-			int fb_flags = 0;
-
 			/*
 			 * free data blocks we just allocated.
 			 * not a good idea to call discard here directly,
 			 * but otherwise we'd need to call it every free().
 			 */
 			ext4_discard_preallocations(inode);
-			if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)
-				fb_flags = EXT4_FREE_BLOCKS_NO_QUOT_UPDATE;
-			ext4_free_blocks(handle, inode, NULL, newblock,
-					 EXT4_C2B(sbi, allocated_clusters),
-					 fb_flags);
+			ext4_ext_remove_space(inode, newex.ee_block, newex.ee_block);
 		}
 		goto out;
 	}