fs/ntfs3: Fix missing i_op in ntfs_read_mft

commit 37a530b upstream. There is null pointer dereference because i_op == NULL. The bug happens because we don't initialize i_op for records in $Extend. Fixes: 82cae26 ("fs/ntfs3: Add initialization of super block") Reported-by: Liangbin Lian <[email protected]> Signed-off-by: Konstantin Komarov <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
tobetter · Aug 25, 2022 · c293e8a · c293e8a
1 parent efdcf4d
commit c293e8a
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
@@ -430,6 +430,7 @@ static struct inode *ntfs_read_mft(struct inode *inode,
 	} else if (fname && fname->home.low == cpu_to_le32(MFT_REC_EXTEND) &&
 		   fname->home.seq == cpu_to_le16(MFT_REC_EXTEND)) {
 		/* Records in $Extend are not a files or general directories. */
+		inode->i_op = &ntfs_file_inode_operations;
 	} else {
 		err = -EINVAL;
 		goto out;