Re: [syzbot] [ext4?] kernel BUG in ext4_inline_data_truncate

[Edward Adam Davis]

Use EXT4_INODE_HAS_XATTR_SPACE to check the existence of xattr space,
before clear the content in the xattr space

#syz test

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index e7a09a99837b..b568232ab871 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1946,7 +1946,8 @@ int ext4_inline_data_truncate(struct inode *inode, int *has_inline)
 			ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS);
 
 		/* Clear the content in the xattr space. */
-		if (inline_size > EXT4_MIN_INLINE_DATA_SIZE) {
+		if (inline_size > EXT4_MIN_INLINE_DATA_SIZE &&
+		    EXT4_INODE_HAS_XATTR_SPACE(inode)) {
 			if ((err = ext4_xattr_ibody_find(inode, &i, &is)) != 0)
 				goto out_error;