Bug 204909

Summary:	valgrind warning on dlsym of non-existing symbol
Product:	[Fedora] Fedora	Reporter:	Caolan McNamara <caolanm>
Component:	glibc	Assignee:	Jakub Jelinek <jakub>
Status:	CLOSED RAWHIDE	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	2.4.90-29	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-09-05 09:04:40 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Caolan McNamara 2006-09-01 09:37:50 UTC

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.6) Gecko/20060830 Fedora/1.5.0.6-9 Firefox/1.5.0.6 pango-text

Description of problem:
#include <dlfcn.h>
int main(void)
{
        void *handle;
        handle = dlopen ("libm.so", RTLD_LAZY);
        dlsym(handle, "foobpe");
        dlclose(handle);
        return 0;
}


Version-Release number of selected component (if applicable):
glibc-2.4.90-26

How reproducible:
Always


Steps to Reproduce:
1. compile above -ldl
2. valgrind ./a.out

Actual Results:
==11913== Conditional jump or move depends on uninitialised value(s)
==11913==    at 0xA1C655: do_lookup_x (in /lib/ld-2.4.90.so)
==11913==    by 0xA1C96F: _dl_lookup_symbol_x (in /lib/ld-2.4.90.so)
==11913==    by 0xB353E2: do_sym (in /lib/libc-2.4.90.so)
==11913==    by 0xB35649: _dl_sym (in /lib/libc-2.4.90.so)
==11913==    by 0xB990A7: dlsym_doit (in /lib/libdl-2.4.90.so)
==11913==    by 0xA20B15: _dl_catch_error (in /lib/ld-2.4.90.so)
==11913==    by 0xB9956B: _dlerror_run (in /lib/libdl-2.4.90.so)
==11913==    by 0xB99032: dlsym (in /lib/libdl-2.4.90.so)
==11913==    by 0x804845E: main (in /home/caolan/a.out)

Expected Results:


Additional info:

Comment 1 Jakub Jelinek 2006-09-04 20:45:51 UTC

Ulrich fixed this in CVS, will show up in next rawhide build.