From: Ben Gras <ben@minix3.org>
Date: Sat, 10 Jul 2010 00:24:43 +0000 (+0000)
Subject: test44: add bogus getsysinfo() to test invalid memory range request to vm
X-Git-Tag: v3.1.8~265
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/doc/processing.js?a=commitdiff_plain;h=b4345d7598af5a091de254950af5b73022c1862c;p=minix.git

test44: add bogus getsysinfo() to test invalid memory range request to vm

test case contributed by Roman Ignatov.
---

diff --git a/test/test44.c b/test/test44.c
index 4f9e73466..96aff0ef3 100644
--- a/test/test44.c
+++ b/test/test44.c
@@ -3,7 +3,10 @@
 #include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <errno.h>
+#include <minix/com.h>
 #include <sys/mman.h>
+#include <sys/wait.h>
 
 int
 main(int argc, char *argv[])
@@ -17,6 +20,7 @@ main(int argc, char *argv[])
 #define STARTV 0x90000000
 	char *vaddr = (char *) STARTV;
 	ssize_t l;
+	pid_t f;
 
 	printf("Test 44 ");
 	fflush(stdout);
@@ -60,8 +64,45 @@ main(int argc, char *argv[])
 		}
 	}
 
+	/* Now start a child to test bogus memory access */
+	if((f = fork()) == -1) {
+		perror("fork");
+		exit(1);
+	}
+
+	if(f > 0) {
+		int st;
+		/* Parent waits. */
+		if(waitpid(f, &st, 0) < 0) {
+			perror("waitpid");
+			exit(1);
+		}
+		if(!WIFEXITED(st)) {
+			fprintf(stderr, "child not signaled\n");
+			exit(1);
+		}
+		if(WEXITSTATUS(st) != 0) {
+			fprintf(stderr, "child exited with nonzero status\n");
+			exit(1);
+		}
+	} else {
+		/* Child performs bogus getsysinfo */
+		int res;
+		char *buf = v[CHUNKS-1];
+		errno = 0;
+      		res = getsysinfo( PM_PROC_NR, SI_PROC_TAB, buf);
+		if(res >= 0)  {
+			fprintf(stderr, "res %d\n", res);
+			exit(1);
+		}
+		if(errno != EFAULT) {
+			fprintf(stderr, "errno %d\n", errno);
+			exit(1);
+		}
+		exit(0);
+	}
+
 	printf("ok\n");
 
 	exit(0);
 }
-