[Bugs] [Bug 1402661] Samba crash when mounting a distributed dispersed volume over CIFS

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1402661



--- Comment #25 from Xavier Hernandez <xhernandez at datalab.es> ---
I'm trying to reproduce the problem to see if the issue can be avoided playing
with the mmap() protection flags. However I'm unable to get the error.

I've used a CentOS 7.3.1611 with latest patches and default configuration, but
it doesn't fail (selinux is enabled by default). Have you used any custom setup
?

I use this small program to try to reproduce the issue:

#include <stdio.h>
#include <sys/mman.h>
#include <errno.h>

#define MMAP_SIZE 4096

int main(void)
{
        void *ptr;

        ptr = mmap(NULL, MMAP_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
                   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
        if (ptr == MAP_FAILED) {
                printf("mmap() error: %d\n", errno);
                return 1;
        }

        printf("mmap succeeded\n");

        munmap(ptr, MMAP_SIZE);

        return 0;
}

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