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Re: Double close with SSL

From: Kevin Baughman <curb_pks_at_yahoo.com>
Date: Thu, 15 Oct 2009 07:52:03 -0700 (PDT)

I apologize, I forgot to include the version:

curl 7.19.6 (i386-redhat-linux-gnu) libcurl/7.19.6 NSS/3.12.4.1 Beta zlib/1.2.3 libidn/1.9 libssh2/1.0
Protocols: tftp ftp telnet dict ldap ldaps http file https ftps scp sftp
Features: GSS-Negotiate IDN IPv6 Largefile SSL libz

Thanks,
Kevin

________________________________
From: Kevin Baughman <curb_pks_at_yahoo.com>
To: curl-library_at_cool.haxx.se
Sent: Thu, October 15, 2009 10:30:23 AM
Subject: Double close with SSL

Hi all,

I was seeing an issue where a file descriptor in a heavily threaded application was being closed from under me. I think I traced it back to a double close in curl, and am able to simply reproduce using a single curl command:
curl https://customers.countrywide.com/protected/entry_authenticated.asp

If I run this under strace:
strace curl https://customers.countrywide.com/protected/entry_authenticated.asp

Notice at the bottom of the trace:
setsockopt(3, SOL_TCP, TCP_NODELAY, [1], 4) = 0
send(3, "\25\3\1\0\22\303\200\346g \201\364r\315\33\26\1\370*\214\21<%"..., 23, 0) = 23
close(3) = 0
close(3) = -1 EBADF (Bad file descriptor)

Thanks,
Kevin

      

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