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Don't leak memory if a copyin fails.

This commit is contained in:
tron 2004-03-01 13:54:02 +00:00
parent 98dbb9f046
commit a188d6072b
1 changed files with 8 additions and 8 deletions
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16
sys/net/if_tun.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_tun.c,v 1.67 2003/09/22 20:49:39 cl Exp $ */
/* $NetBSD: if_tun.c,v 1.68 2004/03/01 13:54:02 tron Exp $ */
/*
* Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
@ -15,7 +15,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_tun.c,v 1.67 2003/09/22 20:49:39 cl Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_tun.c,v 1.68 2004/03/01 13:54:02 tron Exp $");
#include "tun.h"
@ -784,16 +784,16 @@ tunwrite(dev, uio, ioflag)
}
mlen = MHLEN;
top = 0;
top = NULL;
mp = &top;
while (error == 0 && uio->uio_resid > 0) {
m->m_len = min(mlen, uio->uio_resid);
error = uiomove(mtod (m, caddr_t), m->m_len, uio);
error = uiomove(mtod(m, caddr_t), m->m_len, uio);
*mp = m;
mp = &m->m_next;
if (uio->uio_resid > 0) {
MGET (m, M_DONTWAIT, MT_DATA);
if (m == 0) {
if (error == 0 && uio->uio_resid > 0) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
error = ENOBUFS;
break;
}
@ -801,7 +801,7 @@ tunwrite(dev, uio, ioflag)
}
}
if (error) {
if (top)
if (top != NULL)
m_freem (top);
ifp->if_ierrors++;
simple_unlock(&tp->tun_lock);