Hey there,

I am currently battling a problem with heap corruption where the string
"name lookup timed out" appears at a seemingly random location on my
heap and thus corrupts data.

Looking at the code of Curl_resolv_timeout() in hostip.c, I think that
in case of a timeout, the signal handler for SIGALRM never gets removed.
I think that in my case it gets executed at some point later on when
execution has long left Curl_resolv_timeout() or even the cURL library.

The code that is jumped to with siglongjmp() simply sets the error
message to "name lookup timed out" and then returns with
CURLRESOLV_ERROR. I guess that instead of simply returning without
cleaning up, the code should have a goto that jumps to the spot right
after the call to Curl_resolv().

Or am I missing something?

Thomas
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Received on 2010-03-21