diff options
| -rw-r--r-- | fs/ext4/inode.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index fc3e1b474e2c..7d965338c7d2 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5029,8 +5029,16 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino, inode->i_op = &ext4_encrypted_symlink_inode_operations; } else if (ext4_inode_is_fast_symlink(inode)) { inode->i_op = &ext4_fast_symlink_inode_operations; - nd_terminate_link(ei->i_data, inode->i_size, - sizeof(ei->i_data) - 1); + if (inode->i_size == 0 || + inode->i_size >= sizeof(ei->i_data) || + strnlen((char *)ei->i_data, inode->i_size + 1) != + inode->i_size) { + ext4_error_inode(inode, function, line, 0, + "invalid fast symlink length %llu", + (unsigned long long)inode->i_size); + ret = -EFSCORRUPTED; + goto bad_inode; + } inode_set_cached_link(inode, (char *)ei->i_data, inode->i_size); } else { |