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Add diagnostic check which hits when PR 42455 is reproduced. 

Idea from hans@
This commit is contained in:
cegger 2010-10-26 11:44:53 +00:00
parent 85aafab84b
commit cd68b811ed
1 changed files with 10 additions and 2 deletions
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12
sys/nfs/nfs_vnops.c
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@ -1,4 +1,4 @@
/* $NetBSD: nfs_vnops.c,v 1.284 2010/06/24 13:03:17 hannken Exp $ */
/* $NetBSD: nfs_vnops.c,v 1.285 2010/10/26 11:44:53 cegger Exp $ */
/*
* Copyright (c) 1989, 1993
@ -39,7 +39,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.284 2010/06/24 13:03:17 hannken Exp $");
__KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.285 2010/10/26 11:44:53 cegger Exp $");
#ifdef _KERNEL_OPT
#include "opt_nfs.h"
@ -1378,6 +1378,14 @@ retry:
if (v3) {
wccflag = NFSV3_WCCCHK;
nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error);
/* Diagnostic check: The KASSERT hits when PR 42455
* is reproduced.
*/
if (ctx.nwc_mbufcount >= 2) {
KASSERT(mb->m_next != NULL);
}
if (!error) {
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
+ NFSX_V3WRITEVERF);