0001064: Denial of Service causes lockup instead of graceful crash.

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Date Submitted

Last Update

0001064

Zandronum

[All Projects] Bug

public

2012-09-26 02:31

2014-06-12 20:27

Reporter

AlexMax

Assigned To

Priority

normal

Severity

minor

Reproducibility

unable to reproduce

Status

feedback

Resolution

open

Platform

Linux

Ubuntu

OS Version

10.04 x86

Product Version

1.0

Target Version

Fixed in Version

Summary

0001064: Denial of Service causes lockup instead of graceful crash.

Description

Pretty much exactly what it says on the tin. One of my servers was hit with a program that seemed to rapidly have clients connect and disconnect from various IP addresses with random names, and this occurred until the program finally froze. I consider the program locking up a bug, since ideally it would at least crash gracefully so it could be automatically restarted.

Additional Information

Here is the strace output from the locked-up process:

gettimeofday({1348626188, 367165}, NULL) = 0
recvfrom(12, 0x8eebaa0, 131072, 0, 0xbfe4d298, 0xbfe4d2a8) = -1 EAGAIN (Resource
temporarily unavailable)
nanosleep({0, 1000000}, NULL) = 0

These three system calls are repeated 10,000,000 times a second. Perhaps this might provide some insight into what is going on.

Attached Files

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Notes
(0004809) AlexMax (developer) 2012-09-26 02:34	Disregard the initial symptoms. I can't actually confirm why the server went down, only that it did lock up and I got some strace output that might be useful.

(0009163) Watermelon (developer) 2014-06-12 20:27	Is this still an issue?

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Issue History
Date Modified	Username	Field	Change
2012-09-26 02:31	AlexMax	New Issue
2012-09-26 02:34	AlexMax	Note Added: 0004809
2014-06-12 20:27	Watermelon	Note Added: 0009163
2014-06-12 20:27	Watermelon	Status	new => feedback

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