Fix null-pointer dereferences and partial-init failure - #65
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- LOAD_SYMBOL no longer returns early on failure. Instead it sets a global 'shim_disabled' flag and continues resolving all remaining symbols. This prevents null function-pointer calls when one symbol fails to load while others are still interposed. - Add null checks for pointers returned by ShardedMap::Get() in deflate(), inflate(), deflateSetDictionary(), gzwrite(), gzread(), gzclose(), gzeof(), GetDeflateExecutionPath(), and GetInflateExecutionPath(). When the pointer is null (e.g. stream opened via unintercepted gzopen64/deflateCopy, or shim disabled), fall through to the corresponding orig_* function. Signed-off-by: Mulugeta Mammo <mulugeta.mammo@intel.com>
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LOAD_SYMBOL no longer returns early on failure. Instead it sets a global 'shim_disabled' flag and continues resolving all remaining symbols. This prevents null function-pointer calls when one symbol fails to load while others are still interposed.
Add null checks for pointers returned by ShardedMap::Get() in deflate(), inflate(), deflateSetDictionary(), gzwrite(), gzread(), gzclose(), gzeof(), GetDeflateExecutionPath(), and GetInflateExecutionPath(). When the pointer is null (e.g. stream opened via unintercepted gzopen64/deflateCopy, or shim disabled), fall through to the corresponding orig_* function.