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Re: Server crash dump [message #481678 is a reply to message #481259] Thu, 06 June 2013 11:03 Go to previous messageGo to previous message
iRANian is currently offline  iRANian
Messages: 4308
Registered: April 2011
Karma:
General (4 Stars)
Crashed in MDB_SSGM_KeyHook_Clone::Destroyed(GameObject *obj) while Calling ::RemoveHook, which I added to the plugin by copying it from the SSGM 2.0.2 source:

void MDB_SSGM_KeyHook_Clone::Destroyed(GameObject *obj) {
	if (is_keyhook_set == 1337) {
		RemoveHook();
	}
}


void MDB_SSGM_KeyHook_Clone::RemoveHook() {
	if (hookid != 0 && RemoveKeyHook != 0) {
		RemoveKeyHook(hookid);
		hookid = 0;
		if (k != 0) {
			delete[] k->key;
			delete k;
			k = 0;
		}
	}
}


    70: void MDB_SSGM_KeyHook_Clone::Destroyed(GameObject *obj) {
730F12A0 56                   push        esi  
730F12A1 8B F1                mov         esi,ecx  
    71: 	if (is_keyhook_set == 1337) {
730F12A3 81 7E 24 39 05 00 00 cmp         dword ptr [esi+24h],539h  
730F12AA 75 45                jne         MDB_SSGM_KeyHook_Clone::Detach+51h (730F12F1h)  
    72: 		RemoveHook();
730F12AC 8B 46 20             mov         eax,dword ptr [esi+20h]  
730F12AF 85 C0                test        eax,eax  
730F12B1 74 3E                je          MDB_SSGM_KeyHook_Clone::Detach+51h (730F12F1h)  
730F12B3 8B 0D F0 20 0F 73    mov         ecx,dword ptr [__imp_RemoveKeyHook (730F20F0h)]  
730F12B9 8B 09                mov         ecx,dword ptr [ecx]  
730F12BB 85 C9                test        ecx,ecx  
730F12BD 74 32                je          MDB_SSGM_KeyHook_Clone::Detach+51h (730F12F1h)  
730F12BF 50                   push        eax  
730F12C0 FF D1                call        ecx  
730F12C2 8B 46 1C             mov         eax,dword ptr [esi+1Ch]  
730F12C5 83 C4 04             add         esp,4  
730F12C8 C7 46 20 00 00 00 00 mov         dword ptr [esi+20h],0  
730F12CF 85 C0                test        eax,eax  
730F12D1 74 1E                je          MDB_SSGM_KeyHook_Clone::Detach+51h (730F12F1h)  
730F12D3 8B 50 04             mov         edx,dword ptr [eax+4]  // CRASHES HERE
730F12D6 52                   push        edx  
730F12D7 FF 15 80 20 0F 73    call        dword ptr [__imp_operator delete[] (730F2080h)]  
730F12DD 8B 46 1C             mov         eax,dword ptr [esi+1Ch]  
730F12E0 50                   push        eax  
730F12E1 FF 15 88 20 0F 73    call        dword ptr [__imp_operator delete (730F2088h)]  
730F12E7 83 C4 08             add         esp,8  
730F12EA C7 46 1C 00 00 00 00 mov         dword ptr [esi+1Ch],0  
730F12F1 5E                   pop         esi  
    73: 	}
    74: }


Registers:

		EDX	730F22F0	
		EAX	0000001F	
		EBP	0018FAF0	
		AL	1F	


The value of the 'k' pointer variable (which is of type KeyHookStruct )somehow was set to 0x1F instead of a valid pointer address, then the code tries to access memory address variable 'k' + 4 (0x1f + 4) which is invalid and the server crashed.


Long time and well respected Renegade community member, programmer, modder and tester.

Scripts 4.0 private beta tester since May 2011.

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