2005-12-15 Aubrey.Li <aubreylee@gmail.com> writes:

When I mounted nfs on my target, the kernel crashed. And I found it
was caused by stack overflow. When I digged into it. I found the
following issue.

In the file "./uClibc/libc/inet/rpc/auth_unix.c"
 int max_nr_groups = sysconf (_SC_NGROUPS_MAX);
 gid_t gids[max_nr_groups];

And, NGROUPS_MAX is defined in the file "./linux-2.6.x/include/linux/limits.h"
#define NGROUPS_MAX       65536    /* supplemental group IDs are available */

OK, here we can know max_nr_groups is assigned to 65536, that means a
huge matrix "gids[65536] is in the function **authunix_create_default**.

My method is doing it by malloc, the patch as follows.

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