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/* fail - crash in various possible ways */
#include <linux/seccomp.h>
#include <sys/prctl.h>
#include <sys/ptrace.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
void
segfault()
{
volatile int *nullp = 0;
*nullp = 42;
}
// can lockup your machine
void
oom()
{
long c = 0;
static long last = 0;
int fd;
fd = open("/proc/self/oom_score_adj", O_WRONLY);
write(fd, "1000\n", 5);
close(fd);
while (1) {
long *m = malloc(4096*4096);
m[0] = last;
m[1] = c++;
last = (long)m;
write(1, ".", 1);
}
}
void
recurse(char *n)
{
char m[1024];
recurse(m);
if (n)
m[0] = n[0] = 42;
}
void
abortme()
{
abort();
}
void
killme()
{
raise(SIGKILL);
}
void illegalins()
{
#if defined(__x86_64__) || defined(__i386__)
__asm__ __volatile__( "ud1" : : : "memory" );
#elif defined(__arm__)
__asm__ __volatile__(
#ifndef __thumb__
".word 0xe7f000f0"
#else
".short 0xdeff"
#endif
: : : "memory");
#elif defined(__aarch64__)
__asm__ __volatile__( ".word 0x00800011" : : : "memory" );
#else
#error implement illegalins for this architecture
#endif
}
void trap()
{
__builtin_trap();
}
int zero = 0;
void divtrap()
{
zero = 1/zero;
}
void
violate_seccomp()
{
prctl(PR_SET_SECCOMP, SECCOMP_MODE_STRICT);
chdir("/");
}
int
main(int argc, char *argv[])
{
int c;
while ((c = getopt(argc, argv, "123Oacdikrst")) != -1) {
switch (c) {
case '1': exit(-1); break;
case '2': exit(2); break;
case '3': exit(111); break;
case 'c': violate_seccomp(); break;
case 'd': divtrap(); break;
case 'i': illegalins(); break;
case 't': trap(); break;
case 'O': oom(); break;
case 'a': abortme(); break;
case 'k': killme(); break;
case 'r': recurse(0); break;
case 's': segfault(); break;
}
}
write(2, "Usage: fail [-123Oacdikrst]\n", 28);
exit(1);
}
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