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[NTOS:DBGK]

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- Add SEH in DbgkpPostFakeModuleMessages. Fixes crash in ntdll_winetest:info when trying to debug another process that was started suspended.
CORE-13369 #resolve

svn path=/trunk/; revision=74946
This commit is contained in:
Thomas Faber 2017-06-07 20:23:53 +00:00
parent 68dca562d7
commit c2486683cc
1 changed files with 100 additions and 83 deletions
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19
reactos/ntoskrnl/dbgk/dbgkobj.c
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@ -470,6 +470,7 @@ DbgkpPostFakeModuleMessages(IN PEPROCESS Process,
OBJECT_ATTRIBUTES ObjectAttributes;
IO_STATUS_BLOCK IoStatusBlock;
NTSTATUS Status;
UNICODE_STRING FullDllName;
PAGED_CODE();
DBGKTRACE(DBGK_PROCESS_DEBUG, "Process: %p Thread: %p DebugObject: %p\n",
Process, Thread, DebugObject);
@ -477,15 +478,22 @@ DbgkpPostFakeModuleMessages(IN PEPROCESS Process,
/* Quit if there's no PEB */
if (!Peb) return STATUS_SUCCESS;
/* Accessing user memory, need SEH */
_SEH2_TRY
{
/* Get the Loader Data List */
ProbeForRead(Peb, sizeof(*Peb), 1);
LdrData = Peb->Ldr;
ProbeForRead(LdrData, sizeof(*LdrData), 1);
ListHead = &LdrData->InLoadOrderModuleList;
ProbeForRead(ListHead, sizeof(*ListHead), 1);
NextEntry = ListHead->Flink;
/* Loop the modules */
i = 0;
while ((NextEntry != ListHead) && (i < 500))
{
ProbeForRead(NextEntry, sizeof(*NextEntry), 1);
/* Skip the first entry */
if (!i)
{
@ -499,6 +507,7 @@ DbgkpPostFakeModuleMessages(IN PEPROCESS Process,
LdrEntry = CONTAINING_RECORD(NextEntry,
LDR_DATA_TABLE_ENTRY,
InLoadOrderLinks);
ProbeForRead(LdrEntry, sizeof(*LdrEntry), 1);
/* Setup the API Message */
RtlZeroMemory(&ApiMessage, sizeof(DBGKM_MSG));
@ -519,8 +528,10 @@ DbgkpPostFakeModuleMessages(IN PEPROCESS Process,
}
/* Trace */
FullDllName = LdrEntry->FullDllName;
ProbeForRead(FullDllName.Buffer, FullDllName.MaximumLength, 1);
DBGKTRACE(DBGK_PROCESS_DEBUG, "Name: %wZ. Base: %p\n",
&LdrEntry->FullDllName, LdrEntry->DllBase);
&FullDllName, LdrEntry->DllBase);
/* Get the name of the DLL */
Status = MmGetFileNameForAddress(NtHeader, &ModuleName);
@ -567,6 +578,12 @@ DbgkpPostFakeModuleMessages(IN PEPROCESS Process,
NextEntry = NextEntry->Flink;
i++;
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
NOTHING;
}
_SEH2_END;
/* Return success */
return STATUS_SUCCESS;