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Fix label sector confusion, per der mouse (PR#2598).

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pk 1996-07-03 22:02:09 +00:00
parent 614420255a
commit a6adfa8db7
1 changed files with 7 additions and 5 deletions
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12
sys/arch/sparc/sparc/disksubr.c
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@ -1,4 +1,4 @@
/* $NetBSD: disksubr.c,v 1.17 1996/06/29 22:38:11 pk Exp $ */
/* $NetBSD: disksubr.c,v 1.18 1996/07/03 22:02:09 pk Exp $ */
/*
* Copyright (c) 1994, 1995 Gordon W. Ross
@ -292,13 +292,15 @@ bounds_check_with_label(bp, lp, wlabel)
#define dkpart(dev) (minor(dev) & 7)
struct partition *p = lp->d_partitions + dkpart(bp->b_dev);
int labelsect = lp->d_partitions[0].p_offset;
int maxsz = p->p_size;
int sz = (bp->b_bcount + DEV_BSIZE - 1) >> DEV_BSHIFT;
/* overwriting disk label ? */
/* XXX should also protect bootstrap in first 8K */
if (bp->b_blkno + p->p_offset <= LABELSECTOR + labelsect &&
/*
* overwriting disk label ?
* The label is always in sector LABELSECTOR.
* XXX should also protect bootstrap in first 8K
*/
if (bp->b_blkno + p->p_offset <= LABELSECTOR &&
(bp->b_flags & B_READ) == 0 && wlabel == 0) {
bp->b_error = EROFS;
goto bad;