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engine: client: prevent possible null dereference with malformed consistency info packet

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This commit is contained in:
Alibek Omarov
2024-11-06 01:39:45 +03:00
parent b7ed779f71
commit 5f3e167799
1 changed files with 12 additions and 0 deletions
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engine/client/cl_parse.c
+12
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@@ -1870,6 +1870,12 @@ static void CL_ParseConsistencyInfo( sizebuf_t *msg, connprotocol_t proto )
if( !cl.need_force_consistency_response )
return;
if( !pResource )
{
Host_Error( "%s: malformed consistency info packet (resources needed is NULL)\n", __func__ );
return;
}
skip_crc_change = NULL;
lastcheck = 0;
@@ -1887,6 +1893,12 @@ static void CL_ParseConsistencyInfo( sizebuf_t *msg, connprotocol_t proto )
if( pResource != skip_crc_change && Q_strstr( pResource->szFileName, "models/" ))
Mod_NeedCRC( pResource->szFileName, false );
pResource = pResource->pNext;
if( !pResource )
{
Host_Error( "%s: malformed consistency info packet (last check %d, delta %d, position %d)\n", __func__, lastcheck, delta, i );
return;
}
}
if( cl.num_consistency >= MAX_MODELS )