[collectd] Collectd segfaults with curl 7.21.2

Wed Dec 22 02:47:10 CET 2010

And a full backtrace:

--------------------------------------------------------------------------------------------------
(gdb) backtrace full
#0  0xb75f3d72 in Curl_resolv_timeout (conn=0x0, hostname=0x0,
port=-1255148712, entry=0x8055a7d, timeoutms=7)
    at hostip.c:654
	elapsed_ms = 134566370
	alarm_set = 148952256
	keep_sigact = {__sigaction_handler = {sa_handler = 0, sa_sigaction =
0}, sa_mask = {__val = {0, 0, 16832,
      3070230528, 0, 149426640, 3141316, 26627, 0, 0, 1302819, 33188,
4294967295, 0, 0, 0, 0, 0, 148388, 0, 4096,
      304, 0, 3078191392, 0, 1292979439, 0, 1292979439, 0, 1302819, 0,
0}}, sa_flags = -1255148940,
  sa_restorer = 0xb52fef38}
	keep_copysig = false
	sigact = {__sigaction_handler = {sa_handler = 0xb76b78e4
<_IO_setb_internal+20>,
    sa_sigaction = 0xb76b78e4 <_IO_setb_internal+20>}, sa_mask =
{__val = {1667591273, 1953396079, 3078193140,
      3039818571, 3039817240, 3077278555, 3039817276, 3039817548,
3039818571, 3039818600, 3078193140, 3039817276,
      3039817548, 3039817512, 3077252756, 3039817276, 134654652,
3039818608, 3039817548, 0, 3039817436, 1023,
      4222451713, 3039817548, 3039817548, 3039817548, 3039817548,
3039817626, 3039818571, 3039817548, 3039818571,
      0}}, sa_flags = 0, sa_restorer = 0}
	timeout = 1848536425
	prev_alarm = 1952540018
	data = (struct SessionHandle *) 0xb52ff1a4
	rc = -1
#1  0xb77d06c0 in sl_log (severity=Cannot access memory at address 0x8
) at syslog.c:73
No locals.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
--------------------------------------------------------------------------------------------------

b.

On 22 December 2010 02:30, Bostjan Skufca <bostjan at a2o.si> wrote:
> Finally here you have the backtrace:
> - Compile script is below
> - collectd 4.10.2
> - tried to use curl 7.21.2 and 7.21.3 for which changelog says
> something with timeouts has been fixed, but apparently this is not it
> - the commented out patch is irrelevant, just something which enables
> collection of IRQs with string names (LOC, CALm RES, TLB etc.)
>
> ------------------------------------------------------------------------------
> Core was generated by `/usr/local/collectd/sbin/collectd'.
> Program terminated with signal 11, Segmentation fault.
> [New process 12203]
> [New process 12205]
> [New process 12208]
> [New process 12209]
> [New process 12211]
> [New process 12212]
> [New process 12210]
> [New process 12206]
> #0  0xb75f3d72 in Curl_resolv_timeout (conn=0x0, hostname=0x0,
> port=-1255148712, entry=0x8055a7d, timeoutms=7)
>    at hostip.c:654
> 654         unsigned long elapsed_ms = Curl_tvdiff(Curl_tvnow(), conn->created);
> ------------------------------------------------------------------------------
>
> b.
>
>
> PS: Install script:
> -----------------------------------------------------------------------------------------------------
> # cat install-collectd-4.10.2-debug5.sh
> #!/bin/bash
>
>
>
> # Compile directory
> export SRCROOT="/var/src/daemons" &&
> mkdir -p $SRCROOT &&
> cd $SRCROOT &&
>
>
>
> ### Curl - FIXME remove
> # CheckURI: http://curl.haxx.se/download.html
> cd $SRCROOT && . ../_functions.sh &&
> export PNAME="curl" &&
> export PVERSION="7.21.3" &&
> export PDIR="$PNAME-$PVERSION" &&
> export PFILE="$PDIR.tar.gz" &&
> export PURI="http://curl.haxx.se/download/$PFILE" &&
> rm -rf $PDIR &&
> GetUnpackCd &&
> ./configure --enable-debug --with-ssl=$PDESTDIR_OPENSSL CFLAGS="-g -O0" &&
> make -j 2 &&
> make install &&
> ldconfig &&
> cd $SRCROOT &&
> rm -rf $PDIR &&
>
>
>
> ### Set versions and directories
> export PVERSION_COLLECTD="4.10.2" &&
> export PDESTDIR_COLLECTD="/usr/local/collectd-4.10.2-debug5" &&
> export PDESTDIR_MYSQL="/usr/local/mysql-5.1.52-2" &&
>
>
>
> ### Collectd
> # CheckURI: http://www.collectd.org/
> cd $SRCROOT && . ../_functions.sh &&
> export PNAME="collectd" &&
> export PVERSION="$PVERSION_COLLECTD" &&
> export PDIR="$PNAME-$PVERSION" &&
> export PFILE="$PDIR.tar.gz" &&
> export PURI="http://collectd.org/files/$PFILE" &&
>
> rm -rf $PDIR &&
> GetUnpackCd &&
>
> #wget http://source.a2o.si/collectd-4.10.1-all-irq-patch.diff &&
> #cat collectd-4.10.1-all-irq-patch.diff | patch -p1 &&
>
> export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig &&
>
> ./configure --prefix=$PDESTDIR_COLLECTD --sysconfdir=/etc \
>  --enable-debug CFLAGS="-g -O0" \
>  --enable-ping \
>  --with-included-ltdl \
>  --with-libmysql=$PDESTDIR_MYSQL &&
> make &&
> make install &&
>
> unset PKG_CONFIG_PATH &&
>
> cd $SRCROOT &&
> rm -rf $PDIR
> -----------------------------------------------------------------------------------------------------
>
>
>
>
> On 15 December 2010 07:12, Florian Forster <octo at collectd.org> wrote:
>> Hi Bostjan,
>>
>> On Wed, Dec 15, 2010 at 04:16:21AM +0100, Bostjan Skufca wrote:
>>> I just want to note that on my systems (custom builds on top of
>>> Slackware) collectd 4.10.1 and .2 segfaults when libcurl v 7.21.2
>>> (latest currently) is used. If I revert curl to 7.20.1 collectd works
>>> with no problems. These segfaults occured on both, 32 and 64 bit
>>> systems.
>>
>> could you build libcurl and collectd with debugging symbols and,
>> ideally, without optimization. Then try to get a stack backtrace of the
>> crashing program. How to do that using core files is described in our
>> wiki at [0]. This will be of much help to pinpoint the problem and fix
>> it.
>>
>> Best regards,
>> --octo
>>
>> [0] <http://collectd.org/wiki/index.php/Core_file>
>> --
>> Florian octo Forster
>> Hacker in training
>> GnuPG: 0x0C705A15
>> http://octo.it/
>>
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>>
>