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Crash when libcurl invokes prune_dead_connections
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From: Marius via curl-library <curl-library_at_lists.haxx.se>
Date: Tue, 08 Feb 2022 12:08:54 +0000
Hello everyone,
Some time ago I have developed a small C application which uses
libcurl to send data to some APIs. (It's very basic)
Since about mid-December my application started to crash when invoking
libcurl.
After doing some debugging it looks like the prune_dead_connections call
tries to access some freed memory when doing: Curl_timediff[1].
My application the multi interface to libcurl and libevent2 events.
A link to the project is here[2].
I have a dump of the crash[3], from a binary compiled against libevent2
version 2.1.12, and libcurl version curl+7_81_0-1.
Unfortunately I am not sure if the problem is with curl or, more
likely, I had a bug in my integration with it that got exposed by an
update.
If anyone can give me any suggestions about how to investigate this
better, I would appreciate it. Also please let me know what other
type of information I need to provide for others to make sense of
this issue.
Thank you,
/Marius Orcsik
[1]
https://github.com/curl/curl/blob/2610142139d14265ed9acf9ed83cdf73d6bb4d05/lib/url.c#L1084
[2] https://github.com/mariusor/mpris-scrobbler
[3] https://habarnam.ro/mpris-scrobbler.dump.tgz
Date: Tue, 08 Feb 2022 12:08:54 +0000
Hello everyone,
Some time ago I have developed a small C application which uses
libcurl to send data to some APIs. (It's very basic)
Since about mid-December my application started to crash when invoking
libcurl.
After doing some debugging it looks like the prune_dead_connections call
tries to access some freed memory when doing: Curl_timediff[1].
My application the multi interface to libcurl and libevent2 events.
A link to the project is here[2].
I have a dump of the crash[3], from a binary compiled against libevent2
version 2.1.12, and libcurl version curl+7_81_0-1.
Unfortunately I am not sure if the problem is with curl or, more
likely, I had a bug in my integration with it that got exposed by an
update.
If anyone can give me any suggestions about how to investigate this
better, I would appreciate it. Also please let me know what other
type of information I need to provide for others to make sense of
this issue.
Thank you,
/Marius Orcsik
[1]
https://github.com/curl/curl/blob/2610142139d14265ed9acf9ed83cdf73d6bb4d05/lib/url.c#L1084
[2] https://github.com/mariusor/mpris-scrobbler
[3] https://habarnam.ro/mpris-scrobbler.dump.tgz
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