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[NTOS:CM] Do not acquire a KCB lock twice when deleting a key object

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This prevents a deadlock in DelistKeyBodyFromKCB when we delete a key
object because of an access check failure during a open procedure of a
registry key, as we are already holding a lock against the target KCB of
the key body.
This commit is contained in:
George Bișoc 2023-03-03 21:21:05 +01:00
parent 697a52aa33
commit 7fd6f86803
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1 changed files with 1 additions and 1 deletions
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2
ntoskrnl/config/cmsysini.c
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@ -138,7 +138,7 @@ CmpDeleteKeyObject(PVOID DeletedObject)
if (Kcb) if (Kcb)
{ {
/* Delist the key */ /* Delist the key */
DelistKeyBodyFromKCB(KeyBody, FALSE); DelistKeyBodyFromKCB(KeyBody, KeyBody->KcbLocked);
/* Dereference the KCB */ /* Dereference the KCB */
CmpDelayDerefKeyControlBlock(Kcb); CmpDelayDerefKeyControlBlock(Kcb);