On Mon, 12 Mar 2018 22:41:19 +0200
Yauheni Kaliuta [off-list ref] wrote:

Hi, Michal!

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On Thu,  8 Mar 2018 19:14:26 +0100, Michal Suchanek  wrote:  

 > The mod_sig is allocated on stack and when no signature is present
 > it is not initialized and contains garbage. Later when freeing
 > mod_sig garbage pointer is dereferenced.  

I guess, it is enough to init the structure.

Yes, it is enough to initialize the structure. However, this issue is
caused by the awkward interface to the kmod_module_signature_info
function so changing the interface should prevent such errors in the
future.

Thanks

Michal