Bugs item #2805358, was opened at 2009-06-12 12:23
Message generated for change (Comment added) made by bagder
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Category: libcurl
Group: crash
Status: Open
>Resolution: Works For Me
Priority: 5
Private: No
Submitted By: Lisong Guo (guolisong)
Assigned to: Daniel Stenberg (bagder)
Summary: curl crash during POST operation

Initial Comment:
There is a curl crash during a normal POST operation. The version I experienced was libcurl 7.15.3
Here is the stack backtrack:
#0 0x00002ad751d6a892 in curl_free () from /usr/lib64/libcurl.so.3
#1 0x00002ad751d6aad0 in curl_msnprintf () from /usr/lib64/libcurl.so.3
#2 0x00002ad751d6bb35 in curl_mvsnprintf () from /usr/lib64/libcurl.so.3
#3 0x00002ad751d5cdef in Curl_failf () from /usr/lib64/libcurl.so.3
#4 0x00002ad751d56418 in Curl_resolv () from /usr/lib64/libcurl.so.3
#5 0x00002ad751d65abe in Curl_connect () from /usr/lib64/libcurl.so.3

Seem like libcurl would coredump when it could not build a connection to server. By the way, I've set the CURLOPT_TIMEOUT option to 30 seconds. And the crash happened under large load.

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>Comment By: Daniel Stenberg (bagder)
Date: 2009-06-16 19:55

Message:
We do POST all the time, and so do a million apps using libcurl.

Can you please show us a complete example that causes a coredump for you?

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Comment By: Lisong Guo (guolisong)
Date: 2009-06-16 08:26

Message:
No. I just replaced the libcurl.so.3 with the new libcurl.so.4 in 7.19.5.

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Comment By: Dan Fandrich (dfandrich)
Date: 2009-06-16 08:24

Message:
The name of the library in curl 7.19.5 is libcurl.so.4, so you must still
be using the old version (or, you're using Debian).

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Comment By: Lisong Guo (guolisong)
Date: 2009-06-16 07:49

Message:
The bug seemed to be resolved in 7.19.5.
But there is another similar coredump during my testing. As follows:

#0 0x00002b44933adba2 in addbyter () from /usr/lib64/libcurl.so.3
#1 0x00002b44933addf0 in dprintf_formatf () from /usr/lib64/libcurl.so.3
#2 0x00002b44933aef05 in curl_mvsnprintf () from /usr/lib64/libcurl.so.3
#3 0x00002b449339d49f in Curl_failf () from /usr/lib64/libcurl.so.3
#4 0x00002b4493395b45 in Curl_resolv_timeout () from
/usr/lib64/libcurl.so.3
#5 0x00002b44933a7a37 in Curl_connect () from /usr/lib64/libcurl.so.3
#6 0x00002b44933b3fea in Curl_perform () from /usr/lib64/libcurl.so.3

Any idea would be appreciated !

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Comment By: Daniel Stenberg (bagder)
Date: 2009-06-12 16:11

Message:
This bug is reported in an older version and seems (or is possible) to have
been corrected in a more recent version.

If you can please upgrade and try it again with the latest version, it
would help a lot!

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Received on 2009-06-16