CVS commit: src/tests/net/bpfjit

[Alexander Nasonov]

Module Name:    src
Committed By:   alnsn
Date:           Wed Feb 11 23:29:48 UTC 2015

Modified Files:
        src/tests/net/bpfjit: t_bpfjit.c

Log Message:
Add bpfjit_jmp_ja_overflow test.


To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.6 src/tests/net/bpfjit/t_bpfjit.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/bpfjit/t_bpfjit.c
diff -u src/tests/net/bpfjit/t_bpfjit.c:1.5 src/tests/net/bpfjit/t_bpfjit.c:1.6
--- src/tests/net/bpfjit/t_bpfjit.c:1.5	Wed Feb 11 22:37:55 2015
+++ src/tests/net/bpfjit/t_bpfjit.c	Wed Feb 11 23:29:48 2015
@@ -1,4 +1,4 @@
-/*	$NetBSD: t_bpfjit.c,v 1.5 2015/02/11 22:37:55 alnsn Exp $ */
+/*	$NetBSD: t_bpfjit.c,v 1.6 2015/02/11 23:29:48 alnsn Exp $ */
 
 /*-
  * Copyright (c) 2011-2012, 2014 Alexander Nasonov.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_bpfjit.c,v 1.5 2015/02/11 22:37:55 alnsn Exp $");
+__RCSID("$NetBSD: t_bpfjit.c,v 1.6 2015/02/11 23:29:48 alnsn Exp $");
 
 #include <sys/param.h>
 #include <sys/mbuf.h>
@@ -1700,6 +1700,36 @@ ATF_TC_BODY(bpfjit_jmp_ja_invalid, tc)
 	ATF_CHECK(code == NULL);
 }
 
+ATF_TC(bpfjit_jmp_ja_overflow);
+ATF_TC_HEAD(bpfjit_jmp_ja_overflow, tc)
+{
+	atf_tc_set_md_var(tc, "descr",
+	    "Test BPF_JMP+BPF_JA with negative offset");
+}
+
+ATF_TC_BODY(bpfjit_jmp_ja_overflow, tc)
+{
+	static struct bpf_insn insns[] = {
+		BPF_STMT(BPF_JMP+BPF_JA, 1),
+		BPF_STMT(BPF_RET+BPF_K, 777),
+		BPF_STMT(BPF_JMP+BPF_JA, UINT32_MAX - 1), // -2
+		BPF_STMT(BPF_RET+BPF_K, 0)
+	};
+
+	bpfjit_func_t code;
+	size_t insn_count = sizeof(insns) / sizeof(insns[0]);
+
+	RZ(rump_init());
+
+	/* Jumps with negative offsets work only in userspace. */
+	ATF_CHECK(!prog_validate(insns, insn_count));
+
+	rump_schedule();
+	code = rumpns_bpfjit_generate_code(NULL, insns, insn_count);
+	rump_unschedule();
+	ATF_CHECK(code == NULL);
+}
+
 ATF_TC(bpfjit_jmp_jgt_k);
 ATF_TC_HEAD(bpfjit_jmp_jgt_k, tc)
 {
@@ -4491,6 +4521,7 @@ ATF_TP_ADD_TCS(tp)
 	ATF_TP_ADD_TC(tp, bpfjit_alu_neg);
 	ATF_TP_ADD_TC(tp, bpfjit_jmp_ja);
 	ATF_TP_ADD_TC(tp, bpfjit_jmp_ja_invalid);
+	ATF_TP_ADD_TC(tp, bpfjit_jmp_ja_overflow);
 	ATF_TP_ADD_TC(tp, bpfjit_jmp_jgt_k);
 	ATF_TP_ADD_TC(tp, bpfjit_jmp_jge_k);
 	ATF_TP_ADD_TC(tp, bpfjit_jmp_jeq_k);