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[NTOS:KD] Protect against invalid user arguments for BREAKPOINT_LOAD_SYMBOLS. CORE-14057

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This commit is contained in:
Thomas Faber 2017-12-08 14:45:26 +01:00
parent 34ccecbce8
commit 68ebcf16b8
1 changed files with 30 additions and 3 deletions
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33
ntoskrnl/kd/kdmain.c
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@ -153,11 +153,38 @@ KdpEnterDebuggerException(IN PKTRAP_FRAME TrapFrame,
#ifdef KDBG
else if (ExceptionCommand == BREAKPOINT_LOAD_SYMBOLS)
{
PKD_SYMBOLS_INFO SymbolsInfo;
KD_SYMBOLS_INFO CapturedSymbolsInfo;
PLDR_DATA_TABLE_ENTRY LdrEntry;
/* Load symbols. Currently implemented only for KDBG! */
if(KdbpSymFindModule(((PKD_SYMBOLS_INFO)ExceptionRecord->ExceptionInformation[2])->BaseOfDll, NULL, -1, &LdrEntry))
KdbSymProcessSymbols(LdrEntry);
SymbolsInfo = (PKD_SYMBOLS_INFO)ExceptionRecord->ExceptionInformation[2];
if (PreviousMode != KernelMode)
{
_SEH2_TRY
{
ProbeForRead(SymbolsInfo,
sizeof(*SymbolsInfo),
1);
RtlCopyMemory(&CapturedSymbolsInfo,
SymbolsInfo,
sizeof(*SymbolsInfo));
SymbolsInfo = &CapturedSymbolsInfo;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
SymbolsInfo = NULL;
}
_SEH2_END;
}
if (SymbolsInfo != NULL)
{
/* Load symbols. Currently implemented only for KDBG! */
if (KdbpSymFindModule(SymbolsInfo->BaseOfDll, NULL, -1, &LdrEntry))
{
KdbSymProcessSymbols(LdrEntry);
}
}
}
else if (ExceptionCommand == BREAKPOINT_PROMPT)
{