Hi Linus,

attached is the fix with full explanation for CVE-2006-2451. It fixes a
possible privilege escalation through the prctl() system call.

I also put Michael Kerrisk on CC, because the manual page of prctl()
needs adjustment. The value 2 for the PR_SET_DUMPABLE flag is no longer
valid after this patch. The only way to get root-owned core dumps is
through /proc/sys/fs/suid_dumpable and the manual page should reflect
that.

Regards

Marcel