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Bitmaps (TS_BITS and TS_CLRI) dont use the "c_addr" array as they 

cannot have holes.  As bitmaps are written without TS_ADDR records
"c_count" may be larger than the "c_addr" size resulting in a
segmentation violation reading "c_addr" beyond its end.

Compute "blks" for TS_INODE and TS_ADDR only -- its used for multi
volume dumps and the bitmaps must both be on the first volume.
This commit is contained in:
hannken 2021-06-07 14:07:32 +00:00
parent fa566a7940
commit 67464f77e0
1 changed files with 4 additions and 3 deletions
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7
sbin/dump/tape.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: tape.c,v 1.55 2019/03/01 16:42:11 christos Exp $ */
/* $NetBSD: tape.c,v 1.56 2021/06/07 14:07:32 hannken Exp $ */
/*-
* Copyright (c) 1980, 1991, 1993
@ -34,7 +34,7 @@
#if 0
static char sccsid[] = "@(#)tape.c 8.4 (Berkeley) 5/1/95";
#else
__RCSID("$NetBSD: tape.c,v 1.55 2019/03/01 16:42:11 christos Exp $");
__RCSID("$NetBSD: tape.c,v 1.56 2021/06/07 14:07:32 hannken Exp $");
#endif
#endif /* not lint */
@ -328,7 +328,8 @@ flushtape(void)
}
blks = 0;
if (iswap32(spcl.c_type) != TS_END) {
if (iswap32(spcl.c_type) == TS_INODE ||
iswap32(spcl.c_type) == TS_ADDR) {
for (i = 0; i < iswap32(spcl.c_count); i++)
if (spcl.c_addr[i] != 0)
blks++;