CVS commit: src/tests/net/bpfilter

[Alexander Nasonov]

Module Name:    src
Committed By:   alnsn
Date:           Wed Feb 11 23:39:07 UTC 2015

Modified Files:
        src/tests/net/bpfilter: t_bpfilter.c

Log Message:
Add bpfilternegjmp test.


To generate a diff of this commit:
cvs rdiff -u -r1.9 -r1.10 src/tests/net/bpfilter/t_bpfilter.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.


Modified files:

Index: src/tests/net/bpfilter/t_bpfilter.c
diff -u src/tests/net/bpfilter/t_bpfilter.c:1.9 src/tests/net/bpfilter/t_bpfilter.c:1.10
--- src/tests/net/bpfilter/t_bpfilter.c:1.9	Wed Feb 11 19:37:37 2015
+++ src/tests/net/bpfilter/t_bpfilter.c	Wed Feb 11 23:39:07 2015
@@ -1,4 +1,4 @@
-/*	$NetBSD: t_bpfilter.c,v 1.9 2015/02/11 19:37:37 alnsn Exp $	*/
+/*	$NetBSD: t_bpfilter.c,v 1.10 2015/02/11 23:39:07 alnsn Exp $	*/
 
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
@@ -25,7 +25,7 @@
  * SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_bpfilter.c,v 1.9 2015/02/11 19:37:37 alnsn Exp $");
+__RCSID("$NetBSD: t_bpfilter.c,v 1.10 2015/02/11 23:39:07 alnsn Exp $");
 
 #include <sys/param.h>
 #include <sys/ioctl.h>
@@ -120,6 +120,12 @@ static struct bpf_insn badjmp_prog[] = {
 	BPF_STMT(BPF_RET+BPF_A, 0),
 };
 
+static struct bpf_insn negjmp_prog[] = {
+	BPF_STMT(BPF_JMP+BPF_JA, 0),
+	BPF_STMT(BPF_JMP+BPF_JA, UINT32_MAX - 1), // -2
+	BPF_STMT(BPF_RET+BPF_A, 0),
+};
+
 static struct bpf_insn badret_prog[] = {
 	BPF_STMT(BPF_RET+BPF_A+0x8000, 0),
 };
@@ -414,6 +420,24 @@ ATF_TC_BODY(bpfilterbadjmp, tc)
 	ATF_CHECK_ERRNO(EINVAL, send_bpf_prog("bpfilterbadjmp", &prog) == -1);
 }
 
+ATF_TC(bpfilternegjmp);
+ATF_TC_HEAD(bpfilternegjmp, tc)
+{
+
+	atf_tc_set_md_var(tc, "descr", "Checks that bpf program that "
+	    "jumps backwards is rejected by the kernel");
+	atf_tc_set_md_var(tc, "timeout", "30");
+}
+
+ATF_TC_BODY(bpfilternegjmp, tc)
+{
+	struct bpf_program prog;
+
+	prog.bf_len = __arraycount(negjmp_prog);
+	prog.bf_insns = negjmp_prog;
+	ATF_CHECK_ERRNO(EINVAL, send_bpf_prog("bpfilternegjmp", &prog) == -1);
+}
+
 ATF_TC(bpfilterbadret);
 ATF_TC_HEAD(bpfilterbadret, tc)
 {
@@ -451,6 +475,7 @@ ATF_TP_ADD_TCS(tp)
 	ATF_TP_ADD_TC(tp, bpfilternoinitA);
 	ATF_TP_ADD_TC(tp, bpfilternoinitX);
 	ATF_TP_ADD_TC(tp, bpfilterbadjmp);
+	ATF_TP_ADD_TC(tp, bpfilternegjmp);
 	ATF_TP_ADD_TC(tp, bpfilterbadret);
 
 	return atf_no_error();