Package: libnss-ldap
Version: 251-7
Severity: grave
I noticed my postfix bouncing mail when 'deliver' failed with a glibc
malloc checking memory error.
Investigation showed it to always occur in a getpwnam() call. The
following test program fails in
something like 100-400 calls on my libnss-ldap system but works
correctly through 70k calls
(all of /usr/share/dict/words) on 'normal' systems. (Deliver bug is
#408406)
This bug causes email systems to randomly bounce mail. If the bug is
not limited to unrecognized
users it will effect the stability of the whole system. I only have
160 users, not enough to test using
only valid names, they all get cached.
#include <string.h>
#include <stdio.h>
#include <pwd.h>
main()
{
char buf[10240], *b;
struct passwd *p;
int c = 0;
while( b = fgets( buf, sizeof(buf)-1, stdin)) {
char *n = strchr(buf,'\n');
if( n) *n = 0;
p = getpwnam(buf);
fprintf(stderr,".");
if ( c++ > 72) {
c = 0;
fprintf(stderr,"\n");
}
}
}
That program will look up each line of standard input.
A good test is...
fgrep -v \' /usr/share/dict/words | ./ut
... to send in all the words without apostrophes, like so...
[EMAIL PROTECTED]:~$ fgrep -v \' /usr/share/dict/words | ./ut
........................................................................
..
................................................*** glibc detected
*** free(): invalid pointer: 0xb7f17d14 ***
Aborted (core dumped)
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