diff options
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index dc9f0ecd8f4..55d4f461992 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -481,6 +481,11 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, ext_debug("ext4_map_blocks(): inode %lu, flag %d, max_blocks %u," "logical block %lu\n", inode->i_ino, flags, map->m_len, (unsigned long) map->m_lblk); + + /* We can handle the block number less than EXT_MAX_BLOCKS */ + if (unlikely(map->m_lblk >= EXT_MAX_BLOCKS)) + return -EIO; + /* * Try to see if we can get the block without requesting a new * file system block. |