Add asserts to prevent overflows of c_addr.

Add some asserts that prevents the overflows of c_addr. This can't
happen, absent bugs. However, certain large filesystems can cause
problems. These have been prevented by r334968, but a solution
is needed. These asserts will help assure that solution is correct.

PR: 228807
Reviewed by: db

1 files changed, 2 insertions, 0 deletions

diff --git a/sbin/dump/tape.c b/sbin/dump/tape.c
index 845a2660dad4..ed49f718fd0c 100644
--- a/sbin/dump/tape.c
+++ b/sbin/dump/tape.c
@@ -47,6 +47,7 @@ static const char rcsid[] =
 
 #include <protocols/dumprestore.h>
 
+#include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
@@ -279,6 +280,7 @@ flushtape(void)
 
 	blks = 0;
 	if (spcl.c_type != TS_END) {
+		assert(spcl.c_count <= TP_NINDIR);
 		for (i = 0; i < spcl.c_count; i++)
 			if (spcl.c_addr[i] != 0)
 				blks++;