1#include <sys/types.h>
2#include <sys/ioctl.h>
3
4#include <net/bpf.h>
5
6#include <atf-c.h>
7#include <fcntl.h>
8
9#include <rump/rump.h>
10#include <rump/rumpuser.h>
11#include <rump/rump_syscalls.h>
12
13ATF_TC(div_by_zero);
14ATF_TC_HEAD(div_by_zero, tc)
15{
16
17	atf_tc_set_md_var(tc, "descr", "Check that BPF rejects a filter "
18	    "which divides by 0");
19}
20
21ATF_TC_BODY(div_by_zero, tc)
22{
23	struct bpf_program bp;
24	int fd;
25
26	/*
27	 * Source code for following program:
28	 * link[0:4]/0 = 2
29	 */
30	struct bpf_insn bins[] = {
31	    { 0x20, 0, 0, 0x00000000 },
32	    { 0x34, 0, 0, 0x00000000 },
33	    { 0x15, 0, 1, 0x00000002 },
34	    { 0x6, 0, 0, 0x00000060 },
35	    { 0x6, 0, 0, 0x00000000 },
36	};
37
38	bp.bf_len = __arraycount(bins);
39	bp.bf_insns = bins;
40
41	rump_init();
42	fd = rump_sys_open("/dev/bpf", O_RDWR);
43	ATF_CHECK(fd != -1);
44	ATF_REQUIRE_EQ_MSG(rump_sys_ioctl(fd, BIOCSETF, &bp), -1,
45	    "bpf accepted program with division by zero");
46}
47
48ATF_TP_ADD_TCS(tp)
49{
50
51	ATF_TP_ADD_TC(tp, div_by_zero);
52	return atf_no_error();
53}
54