Re: [PATCH 08/64] staging: rtl8192u: Use struct_group() for memcpy() region

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Jul 27, 2021 at 01:57:59PM -0700, Kees Cook wrote:
> In preparation for FORTIFY_SOURCE performing compile-time and run-time
> field bounds checking for memcpy(), memmove(), and memset(), avoid
> intentionally writing across neighboring fields.
> 
> Use struct_group() around members addr1, addr2, and addr3 in struct
> rtl_80211_hdr_4addr, and members qui, qui_type, qui_subtype, version,
> and ac_info in struct ieee80211_qos_information_element, so they can be
> referenced together. This will allow memcpy() and sizeof() to more easily
> reason about sizes, improve readability, and avoid future warnings about
> writing beyond the end of addr1 and qui. Additionally replace zero sized
> arrays with flexible arrays in struct ieee_param.
> 
> "pahole" shows no size nor member offset changes to struct
> rtl_80211_hdr_4addr nor struct ieee80211_qos_information_element. "objdump
> -d" shows no meaningful object code changes (i.e. only source line number
> induced differences and optimizations).
> 
> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>

Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>



[Index of Archives]     [Linux&nblp;USB Development]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite Secrets]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux