[PATCH] Add EXT4_STATE_MAY_INLINE_DATA check in ext4_readdir

After a failure in the route ext4_restore_inline_data ->
ext4_create_inline_data -> ext4_mark_iloc_dirty, the inode will still
be considered as having inline data. However, in ext4_restore_inline_data,
the inline data is not actually written to the inode. When ext4_readdir
is subsequently called,ext4_has_inline_data will pass the check
and proceed to read the incorrect inline data.

Signed-off-by: pipishuo <[email protected]>
---
 fs/ext4/dir.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 17edd678fa87..6117a798541a 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -22,6 +22,7 @@
  *
  */
 
+#include <asm-generic/errno-base.h>
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
 #include <linux/filelock.h>
@@ -159,6 +160,9 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
 	}
 
 	if (ext4_has_inline_data(inode)) {
+		if (!ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA))
+			return -EINVAL;
+
 		int has_inline_data = 1;
 		err = ext4_read_inline_dir(file, ctx,
 					   &has_inline_data);
-- 
2.47.3