Bug 489

Backtrace and valgrind

gdb pidgin
GNU gdb (GDB) 7.2-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
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and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/pidgin...Reading symbols from /usr/lib/debug/usr/bin/pidgin...done.
done.
(gdb) r
Starting program: /usr/bin/pidgin
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffe28dc700 (LWP 23570)]

Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x00007fffdea9d046 in freebl_LoadDSO () at loader.c:165
#2  0x00007fffe30c897a in PR_CallOnce (once=0x7fffdecaaab4, func=0x7fffdeaa2b71) at prinit.c:807
#3  0x00007fffdea9b362 in RNG_RNGInit () at loader.c:840
#4  0x00007fffdea7c33b in nsc_CommonInitialize (pReserved=0x7fffffffb8d0, isFIPS=0) at pkcs11.c:2752
#5  0x00007fffdea7c5d7 in NSC_Initialize (pReserved=0x7fffffffb8d0) at pkcs11.c:2880
#6  0x00007fffe3daaefc in secmod_ModuleInit (mod=0x8608e0, reload=0x7fffdeaa2b71, alreadyLoaded=0x7fffffffb96c) at pk11load.c:252
#7  0x00007fffe3dab877 in secmod_LoadPKCS11Module (mod=0x8608e0, oldModule=0x7fffffffba20) at pk11load.c:503
#8  0x00007fffe3dc0a25 in SECMOD_LoadModule (
    modulespec=0x860570 "library= name=\"NSS Internal PKCS #11 Module\" parameters=\"configdir='' certPrefix='' keyPrefix='' secmod='' flags=readOnly,noCertDB,noModDB,forceOpen,optimizeSpace updatedir='' updateCertPrefix='' upda"...,
    parent=<value optimized out>, recurse=<value optimized out>) at pk11pars.c:1108
#9  0x00007fffe3dc0bb0 in SECMOD_LoadModule (
    modulespec=0x85e7e0 "name=\"NSS Internal Module\" parameters=\"configdir='' certPrefix='' keyPrefix='' secmod='' flags=readOnly,noCertDB,noModDB,forceOpen,optimizeSpace updatedir='' updateCertPrefix='' updateKeyPrefix='' upd"...,
    parent=<value optimized out>, recurse=<value optimized out>) at pk11pars.c:1143
#10 0x00007fffe3d8e6b4 in nss_InitModules (configdir=<value optimized out>, certPrefix=<value optimized out>, keyPrefix=<value optimized out>, secmodName=<value optimized out>, updateDir=<value optimized out>,
    updCertPrefix=<value optimized out>, updKeyPrefix=0x7fffe3e7408f "", updateID=0x7fffe3e7408f "", updateName=0x7fffe3e7408f "", initContextPtr=0x0, initParams=0x0, readOnly=1, noCertDB=1, noModDB=1, forceOpen=1, noRootInit=1,
    optimizeSpace=1, noSingleThreadedModules=0, allowAlreadyInitializedModules=0, dontFinalizeModules=0) at nssinit.c:461
#11 nss_Init (configdir=<value optimized out>, certPrefix=<value optimized out>, keyPrefix=<value optimized out>, secmodName=<value optimized out>, updateDir=<value optimized out>, updCertPrefix=<value optimized out>,
    updKeyPrefix=0x7fffe3e7408f "", updateID=0x7fffe3e7408f "", updateName=0x7fffe3e7408f "", initContextPtr=0x0, initParams=0x0, readOnly=1, noCertDB=1, noModDB=1, forceOpen=1, noRootInit=1, optimizeSpace=1,
    noSingleThreadedModules=0, allowAlreadyInitializedModules=0, dontFinalizeModules=0) at nssinit.c:620
#12 0x00007fffe3d8edd7 in NSS_NoDB_Init (configdir=<value optimized out>) at nssinit.c:840
#13 0x00007fffe40ae39f in ssl_nss_init_nss (plugin=<value optimized out>) at /build/buildd/pidgin-2.7.3/./libpurple/plugins/ssl/ssl-nss.c:130
#14 plugin_load (plugin=<value optimized out>) at /build/buildd/pidgin-2.7.3/./libpurple/plugins/ssl/ssl-nss.c:979
#15 0x00007ffff497be1f in purple_plugin_load (plugin=0x8136f0) at /build/buildd/pidgin-2.7.3/./libpurple/plugin.c:609
#16 0x00007fffe1cd6a0a in probe_ssl_plugins (plugin=0x83ab10) at /build/buildd/pidgin-2.7.3/./libpurple/plugins/ssl/ssl.c:50
#17 plugin_load (plugin=0x83ab10) at /build/buildd/pidgin-2.7.3/./libpurple/plugins/ssl/ssl.c:65
#18 0x00007ffff497be1f in purple_plugin_load (plugin=0x83ab10) at /build/buildd/pidgin-2.7.3/./libpurple/plugin.c:609
#19 0x00007ffff4999138 in ssl_init () at /build/buildd/pidgin-2.7.3/./libpurple/sslconn.c:50
#20 0x00007ffff4999149 in purple_ssl_init () at /build/buildd/pidgin-2.7.3/./libpurple/sslconn.c:316
#21 0x00007ffff495ff5f in purple_core_init (ui=<value optimized out>) at /build/buildd/pidgin-2.7.3/./libpurple/core.c:173
#22 0x0000000000481f55 in main (argc=1, argv=0x7fffffffe1d8) at /build/buildd/pidgin-2.7.3/./pidgin/gtkmain.c:858
(gdb) q
A debugging session is active.

        Inferior 1 [process 23519] will be killed.

Quit anyway? (y or n) y


valgrind pidgin
==23848== Memcheck, a memory error detector
==23848== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==23848== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
==23848== Command: pidgin
==23848==
==23848== Jump to the invalid address stated on the next line
==23848==    at 0x0: ???
==23848==    by 0x1F391045: freebl_LoadDSO (loader.c:165)
==23848==    by 0x1AD39979: PR_CallOnce (prinit.c:807)
==23848==    by 0x1F38F361: RNG_RNGInit (loader.c:840)
==23848==    by 0x1F37033A: nsc_CommonInitialize (pkcs11.c:2752)
==23848==    by 0x1F3705D6: NSC_Initialize (pkcs11.c:2880)
==23848==    by 0x19F94EFB: secmod_ModuleInit (pk11load.c:252)
==23848==    by 0x19F95876: secmod_LoadPKCS11Module (pk11load.c:503)
==23848==    by 0x19FAAA24: SECMOD_LoadModule (pk11pars.c:1108)
==23848==    by 0x19FAABAF: SECMOD_LoadModule (pk11pars.c:1143)
==23848==    by 0x19F786B3: nss_Init (nssinit.c:461)
==23848==    by 0x19F78DD6: NSS_NoDB_Init (nssinit.c:840)
==23848==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==23848==
==23848==
==23848== Process terminating with default action of signal 11 (SIGSEGV)
==23848==  Bad permissions for mapped region at address 0x0
==23848==    at 0x0: ???
==23848==    by 0x1F391045: freebl_LoadDSO (loader.c:165)
==23848==    by 0x1AD39979: PR_CallOnce (prinit.c:807)
==23848==    by 0x1F38F361: RNG_RNGInit (loader.c:840)
==23848==    by 0x1F37033A: nsc_CommonInitialize (pkcs11.c:2752)
==23848==    by 0x1F3705D6: NSC_Initialize (pkcs11.c:2880)
==23848==    by 0x19F94EFB: secmod_ModuleInit (pk11load.c:252)
==23848==    by 0x19F95876: secmod_LoadPKCS11Module (pk11load.c:503)
==23848==    by 0x19FAAA24: SECMOD_LoadModule (pk11pars.c:1108)
==23848==    by 0x19FAABAF: SECMOD_LoadModule (pk11pars.c:1143)
==23848==    by 0x19F786B3: nss_Init (nssinit.c:461)
==23848==    by 0x19F78DD6: NSS_NoDB_Init (nssinit.c:840)
==23848==
==23848== HEAP SUMMARY:
==23848==     in use at exit: 1,337,747 bytes in 12,891 blocks
==23848==   total heap usage: 160,533 allocs, 147,642 frees, 7,571,914 bytes allocated
==23848==
==23848== LEAK SUMMARY:
==23848==    definitely lost: 858 bytes in 5 blocks
==23848==    indirectly lost: 416 bytes in 13 blocks
==23848==      possibly lost: 460,149 bytes in 4,597 blocks
==23848==    still reachable: 876,324 bytes in 8,276 blocks
==23848==         suppressed: 0 bytes in 0 blocks
==23848== Rerun with --leak-check=full to see details of leaked memory
==23848==
==23848== For counts of detected and suppressed errors, rerun with: -v
==23848== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 284 from 5)
Killed

This crash is caused by the nspr library not being loaded, which prevents kgtk from accessing the "real" version of the PR_FindFunctionSymbol function.  kgtk therefore also depends on nspr when accessing nspr-dependent programs.

This bug has been fixed in the following SVN revisions:
1243491
1243492
1243493

*** Bug 458 has been marked as a duplicate of this bug. ***