Bugs item #948950, was opened at 2004-05-05 20:51
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Category: libcurl
Group: crash
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Daniel Stenberg (bagder)
Summary: select() in libcurl causes the program to crash

Initial Comment:
Using curl 7.11.2, my program crashed now and then,
could neither find the reason, nor get a stack trace after
receiving SIGSEGV. Yesterday I spent a couple of hours
tracking the bug and found that the crash occurs in libcurl,
in:
 
lib/connect.c:213
 
which is a select() call. Further debugging explained the
reasons: having many (over 10k) files mmapped the
socket descriptor for curl (sockfd) was over 10k so using
the std. fd_set was not appropriate since FD_SETSIZE is
only 1024 on my system (Gentoo Linux on 2.6.5)
 
I couldn't find a simple solution yet, a curl recompile with
-DFD_SETSIZE=4096 did not help (the library overwrites it
I assume).
 
Sandor Kovacs, sakovacs_at_freemail.hu

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Received on 2004-05-06