[Bug-wget] Fix for crash on invalid STYLE tag

[Gijs van Tulder]

Hi,

Here's a tiny fix for a problem in the HTML parsing in html-url.c.

Wget crashes on HTML files that contain an incomplete STYLE tag, e.g.:

  <style </style>

If it finds one of those, it calls get_urls_css with an invalid buffer 
(the buffer has a negative length), which leads to this crash:

  bad buffer in yy_scan_bytes()
  ERROR (2)

The attached patch checks the buffer before calling get_urls_css. The 
content of the incomplete tag still won't be parsed, but at least it 
will no longer lead to a crash.

Regards,

Gijs

wget-style-bug.patch
Description: Text Data