Bug 35998 - HttpListener easily cause deadloop
Summary: HttpListener easily cause deadloop
Alias: None
Product: Class Libraries
Classification: Mono
Component: System.Net.Http ()
Version: 4.0.0
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2015-11-18 08:50 UTC by firebank
Modified: 2015-11-19 16:28 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

Test Server Program (1.21 KB, text/plain)
2015-11-18 08:50 UTC, firebank

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Description firebank 2015-11-18 08:50:34 UTC
Created attachment 13863 [details]
Test Server Program

Mono Version : 4.0.2
OS           : CentOS6.6 64bit / CentOS7.0 64bit


bool ProcessInput (MemoryStream ms)

	do {
		if (line == null)
		if (line == "") {
			if (input_state == InputState.RequestLine)
			current_line = null;
			ms = null;
			return true;


	} while( line != null);

	if (used == len) {
		ms.SetLength (0);
		position = 0;
	return false;

ProcessInput function will deadloop after the client send a empty line.

e.g :
1) telnet IP PORT
2) Type a Enter
3) Type 123
4) Type a Enter

The same operation used on Windows .Net will return a 400 Bad Request.
Comment 1 firebank 2015-11-18 21:59:28 UTC

1) telnet IP PORT
2) Type Enter
3) Type 123
4) Type Enter
Comment 2 Martin Baulig 2015-11-19 16:28:09 UTC
We fixed that last week.