Bug in /usr/lib/64/libc.so.1:strncmp

Question

Hi,
i have encountered a bug in the 64-bit libc. strncmp seems to compare too many bytes in some cases.
(Sample source code included at end). I have the feeling that this is not the right forum to post it, but
where else? I found no solution in the patches collection.
My system is (uname -a): SunOS paloalto 5.8 Generic_108528-16 sun4u sparc SUNW,UltraAX-MP
Can anybody check if this happens in SunOS 5.9, too?
Greetings - Rasmus
Sample code:
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#define LEN 8
int main ()
char p1, p2;
p1 = mmap (0, getpagesize () * 2, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANON, -1, 0); /* get 2 pages */
p2 = p1 + getpagesize (); /* second page */
memset (p1, 0, getpagesize () * 2); memset (p2 - LEN, 'a', LEN); /* string at end of page 1 */
mprotect (p2, getpagesize (), 0); /* disallow read for page 2 (end of string) */
/* compare string (last LEN bytes of page 1) with itself->SEGV; memcmp works */
printf ("strncmp: %d\n", strncmp (p2 - LEN, p2 - LEN, LEN));

Answer 1

cell wrote:I read some where that the conflict comes when if you install with the script from nvidia.com and then reverse back to the driver from the repository.
Same happened to me.
I never installed anything manually, and I also had that issue.
So the explanation given in the link I gave above is more probable, at least in my case.
Otherwise, simply removing the conflicting file is in my opinion the easiest and safest way.