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Avoid kernel memory corruption if user buffer too small; return ENOMEM in stead.

This commit is contained in:
pk 1995-01-10 16:47:03 +00:00
parent fe2c68f0d3
commit b87c1bb24a
1 changed files with 6 additions and 5 deletions
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11
sys/arch/sparc/sparc/openprom.c
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@ -1,4 +1,4 @@
/* $NetBSD: openprom.c,v 1.4 1994/11/20 20:54:34 deraadt Exp $ */
/* $NetBSD: openprom.c,v 1.5 1995/01/10 16:47:03 pk Exp $ */
/*
* Copyright (c) 1992, 1993
@ -165,10 +165,11 @@ openpromioctl(dev, cmd, data, flags, p)
s = splhigh();
len = no->no_proplen(node, name);
splx(s);
if (len > op->op_buflen)
len = op->op_buflen;
else
op->op_buflen = len;
if (len > op->op_buflen) {
error = ENOMEM;
break;
}
op->op_buflen = len;
/* -1 means no entry; 0 means no value */
if (len <= 0)
break;