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Windows: NotifyHardLink avoid null ptr reference

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In AFSNotifyHardLink, if the TargetDirectoryCB out parameter is non-NULL
but pDirNode is NULL, do not attempt to increment the
DirOpenReferenceCount because doing so will trigger an exception.

Change-Id: I9d50e05aff9a4922113f814dd3d50e115725ecca
Reviewed-on: http://gerrit.openafs.org/9903
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
This commit is contained in:
Jeffrey Altman 2013-05-13 10:09:11 -04:00
parent 4a91ac6f83
commit 975c11cb35
1 changed files with 12 additions and 8 deletions
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4
src/WINNT/afsrdr/kernel/lib/AFSCommSupport.cpp
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@ -2419,6 +2419,9 @@ AFSNotifyHardLink( IN AFSObjectInfoCB *ObjectInfo,
try_exit: try_exit:
if ( TargetDirectoryCB != NULL) if ( TargetDirectoryCB != NULL)
{
if ( pDirNode != NULL)
{ {
lCount = InterlockedIncrement( &pDirNode->DirOpenReferenceCount); lCount = InterlockedIncrement( &pDirNode->DirOpenReferenceCount);
@ -2431,6 +2434,7 @@ try_exit:
lCount)); lCount));
ASSERT( lCount >= 0); ASSERT( lCount >= 0);
}
*TargetDirectoryCB = pDirNode; *TargetDirectoryCB = pDirNode;
} }