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erase dangling pointer to prevent reuse

This commit is contained in:
mlelstv 2016-01-04 10:02:15 +00:00
parent 0f733709b9
commit 06fc94e2fe
1 changed files with 3 additions and 2 deletions
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5
sys/dev/dksubr.c
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@ -1,4 +1,4 @@
/* $NetBSD: dksubr.c,v 1.85 2015/12/21 12:33:12 mlelstv Exp $ */
/* $NetBSD: dksubr.c,v 1.86 2016/01/04 10:02:15 mlelstv Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998, 1999, 2002, 2008 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: dksubr.c,v 1.85 2015/12/21 12:33:12 mlelstv Exp $");
__KERNEL_RCSID(0, "$NetBSD: dksubr.c,v 1.86 2016/01/04 10:02:15 mlelstv Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -451,6 +451,7 @@ dk_drain(struct dk_softc *dksc)
mutex_enter(&dksc->sc_iolock);
bp = dksc->sc_deferred;
dksc->sc_deferred = NULL;
if (bp != NULL) {
bp->b_error = EIO;
bp->b_resid = bp->b_bcount;