Commit 599a9b77 authored by Jan Kara's avatar Jan Kara Committed by Theodore Ts'o
Browse files

ext4: fix oops when loading block bitmap failed 



When we fail to load block bitmap in __ext4_new_inode() we will
dereference NULL pointer in ext4_journal_get_write_access(). So check
for error from ext4_read_block_bitmap().

Coverity-id: 989065
Cc: stable@vger.kernel.org
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 9378c676

fs/ext4/ialloc.c

+4 −0
Original line number Diff line number Diff line
@@ -887,6 +887,10 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir, 
		struct buffer_head *block_bitmap_bh;



		block_bitmap_bh = ext4_read_block_bitmap(sb, group);

		if (!block_bitmap_bh) {

			err = -EIO;

			goto out;

		}

		BUFFER_TRACE(block_bitmap_bh, "get block bitmap access");

		err = ext4_journal_get_write_access(handle, block_bitmap_bh);

		if (err) {