Commit adb6dc19 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: return error when accessing insane flie offset 



If file offset is insane, we have to return error instead of kernel panic.

Reported-by: default avatarEric Zhang <followme999@163.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 0adf6a1b

fs/f2fs/node.c

+5 −1
Original line number Diff line number Diff line
@@ -555,7 +555,7 @@ static int get_node_path(struct inode *inode, long block, 
		level = 3;

		goto got;

	} else {

		BUG();

		return -E2BIG;

	}

got:

	return level;
@@ -579,6 +579,8 @@ int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode) 
	int err = 0;



	level = get_node_path(dn->inode, index, offset, noffset);

	if (level < 0)

		return level;



	nids[0] = dn->inode->i_ino;

	npage[0] = dn->inode_page;
@@ -878,6 +880,8 @@ int truncate_inode_blocks(struct inode *inode, pgoff_t from) 
	trace_f2fs_truncate_inode_blocks_enter(inode, from);



	level = get_node_path(inode, from, offset, noffset);

	if (level < 0)

		return level;



	page = get_node_page(sbi, inode->i_ino);

	if (IS_ERR(page)) {