1 /* $NetBSD: t_bpf.c,v 1.1 2010/12/06 11:32:01 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/ioctl.h> 30 #include <sys/socket.h> 31 #include <sys/mbuf.h> 32 #include <sys/sysctl.h> 33 34 #include <net/if.h> 35 #include <net/bpf.h> 36 37 #include <fcntl.h> 38 #include <stdio.h> 39 #include <string.h> 40 41 #include <rump/rump.h> 42 #include <rump/rump_syscalls.h> 43 44 /* XXX: atf-c.h has collisions with mbuf */ 45 #undef m_type 46 #undef m_data 47 #include <atf-c.h> 48 49 #include "../../h_macros.h" 50 51 ATF_TC(bpfwriteleak); 52 ATF_TC_HEAD(bpfwriteleak, tc) 53 { 54 55 atf_tc_set_md_var(tc, "descr", "Checks that writing to /dev/bpf " 56 "does not leak mbufs"); 57 } 58 59 static int 60 getmtdata(void) 61 { 62 struct mbstat mbstat; 63 size_t mbstatlen = sizeof(mbstat); 64 const int mbstat_mib[] = { CTL_KERN, KERN_MBUF, MBUF_STATS }; 65 66 RL(rump_sys___sysctl(mbstat_mib, __arraycount(mbstat_mib), 67 &mbstat, &mbstatlen, NULL, 0)); 68 return mbstat.m_mtypes[MT_DATA]; 69 } 70 71 ATF_TC_BODY(bpfwriteleak, tc) 72 { 73 char buf[28]; /* sizeof(garbage) > etherhdrlen */ 74 struct ifreq ifr; 75 int ifnum, bpfd; 76 u_int x; 77 78 RZ(rump_init()); 79 RZ(rump_pub_shmif_create(NULL, &ifnum)); 80 sprintf(ifr.ifr_name, "shmif%d", ifnum); 81 82 RL(bpfd = rump_sys_open("/dev/bpf", O_RDWR)); 83 RL(rump_sys_ioctl(bpfd, BIOCSETIF, &ifr)); 84 x = 1; 85 RL(rump_sys_ioctl(bpfd, BIOCSFEEDBACK, &ifr)); 86 87 if (getmtdata() != 0) 88 atf_tc_fail("test precondition failed: MT_DATA mbufs != 0"); 89 90 ATF_REQUIRE_ERRNO(ENETDOWN, rump_sys_write(bpfd, buf, sizeof(buf))==-1); 91 92 atf_tc_expect_fail("PR kern/44196"); 93 ATF_REQUIRE_EQ(getmtdata(), 0); 94 } 95 96 ATF_TP_ADD_TCS(tp) 97 { 98 99 ATF_TP_ADD_TC(tp, bpfwriteleak); 100 return atf_no_error(); 101 } 102