http://bugs.freedesktop.org/show_bug.cgi?id=26121
Summary: Crash on x86-64 (but not on x86) for glLightfv w/o
rendering context
Product: Mesa
Version: unspecified
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Mesa core
AssignedTo: mesa3d-dev@lists.sourceforge.net
ReportedBy: tobias.bur...@physik.fu-berlin.de
The problem was encountered using XCrySDen (http://www.xcrysden.org/) and
appears with both mesa-libGL-devel-6.5.1-9.fc6 and Mesa-7.7-5.3.x86_64 on
Linux.
The problem is that calling glLightfv without a rendering context crashes in
libGL x86-64 - while libGL x86 (i686) works. There seems to be a NULL pointer
check missing.
While the application should have a rendering context (I will report a bug), it
probably makes still sense to add a NULL check in Mesa.
$ cat test.c
#include <GL/gl.h>
int main ()
{
GLfloat ambient[4] = {0.2, 0.2, 0.2, 1.0};
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
return 0;
}
$ gcc test.c -lGL && ./a.out
Segmentation fault
$ gcc -m32 test.c -lGL && ./a.out
$
See also:
http://sourceforge.net/mailarchive/message.php?msg_name=4B559729.3000509%40net-b.de
http://sourceforge.net/mailarchive/message.php?msg_name=4B55D3B5.9010506%40vmware.com
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