Re: [PATCH V2] net/nfc/nci: fix infoleak in struct nci_set_config_param

[weiyongjun (A)]

> From: "Minghao Chi (CGEL ZTE)" <chi.minghao@xxxxxxxxxx>
>
> On 64-bit systems, struct nci_set_config_param has
> an added padding of 7 bytes between struct members
> id and len. Even though all struct members are initialized,
> the 7-byte hole will contain data from the kernel stack.
> This patch zeroes out struct nci_set_config_param before
> usage, preventing infoleaks to userspace.


How this info leaks to userspace?


nci_set_config_req() convert to use packed 'struct nci_core_set_config_cmd'

to send data, which does not contain hole.