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Avoid deref'ing a bad pointer in ccdopen(). This could happen if 

any partition other than RAW_PART is opened before configuring the
ccd.  Bug pointed out by Matthew Green.
This commit is contained in:
thorpej 1996-02-11 18:04:01 +00:00
parent fee47471be
commit 91bd533c48
1 changed files with 8 additions and 5 deletions
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13
sys/dev/ccd.c
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@ -1,4 +1,4 @@
/* $NetBSD: ccd.c,v 1.26 1996/02/10 22:27:22 hpeyerl Exp $ */
/* $NetBSD: ccd.c,v 1.27 1996/02/11 18:04:01 thorpej Exp $ */
/*
* Copyright (c) 1995, 1996 Jason R. Thorpe.
@ -564,10 +564,13 @@ ccdopen(dev, flags, fmt, p)
ccdgetdisklabel(dev);
/* Check that the partition exists. */
if (part != RAW_PART && ((part > lp->d_npartitions) ||
(lp->d_partitions[part].p_fstype == FS_UNUSED))) {
error = ENXIO;
goto done;
if (part != RAW_PART) {
if (((cs->sc_flags & CCDF_INITED) == 0) ||
((part > lp->d_npartitions) ||
(lp->d_partitions[part].p_fstype == FS_UNUSED))) {
error = ENXIO;
goto done;
}
}
/* Prevent our unit from being unconfigured while open. */