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