Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 106 by mar...@hyves.nl: binary protocol parsing can cause
memcached server lockup
http://code.google.com/p/memcached/issues/detail?id=106
What steps will reproduce the problem?
1. run a memcached server on localhost port 10000
2. compile and run the attached c code
3. change the len from 37 to 38 on line 69, recompile and run the code
again.
What is the expected output? What do you see instead?
use top and watch the cpu stats for step 2 and 3. Even after stopping the
programs from step 3 the memcached server is using 100% cpu. For step 2 and
3 I expect for the load to drop to 0 after stopping the program.
What version of the product are you using? On what operating system?
memcached v1.4.3 on linux 2.6 compiled libevent using epoll.
Please provide any additional information below.
The attached code currently be only compiled under linux 2.6 with epoll
support.
Please note that by changing the length of 37 to 38 bytes I broke the
memcached binary spec intentionally. My point is that memcached should have
better protocol handling to protect itself against faulty packets.
Attachments:
test.c 1.9 KB
--
You received this message because you are listed in the owner
or CC fields of this issue, or because you starred this issue.
You may adjust your issue notification preferences at:
http://code.google.com/hosting/settings
