lkml.org 
[lkml]   [2022]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v2 5/6] bna: Avoid clashing function prototypes
From


On 10/29/22 02:12, Kees Cook wrote:
> On Thu, Oct 27, 2022 at 03:20:47PM -0500, Gustavo A. R. Silva wrote:
>> When built with Control Flow Integrity, function prototypes between
>> caller and function declaration must match. These mismatches are visible
>> at compile time with the new -Wcast-function-type-strict in Clang[1].
>>
>> Fix a total of 227 warnings like these:
>>
>> drivers/net/ethernet/brocade/bna/bna_enet.c:519:3: warning: cast from 'void (*)(struct bna_ethport *, enum bna_ethport_event)' to 'bfa_fsm_t' (aka 'void (*)(void *, int)') converts to incompatible function type [-Wcast-function-type-strict]
>> bfa_fsm_set_state(ethport, bna_ethport_sm_down);
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> The bna state machine code heavily overloads its state machine functions,
>> so these have been separated into their own sets of structs, enums,
>> typedefs, and helper functions. There are almost zero binary code changes,
>> all seem to be related to header file line numbers changing, or the
>> addition of the new stats helper.
>
> This looks like it borrowed from
> https://lore.kernel.org/linux-hardening/20220929230334.2109344-1-keescook@chromium.org/
> Nice to get a couple hundred more fixed. :)

Yep; you're right. That's exactly the patch I was staring at
while doing these changes. :)

>
>> [1] https://reviews.llvm.org/D134831
>> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
>> ---
>> Changes in v2:
>> - None. This patch is new in the series.
>
> This is relatively stand-alone (not an iw_handler patch), so it could
> also go separately too.

My criteria here was that all these patches avoid clashing function
prototypes. So, they could be put together into a series, regardless
if they are "iw_handler" related patches.

> Reviewed-by: Kees Cook <keescook@chromium.org>

Thanks!
--
Gustavo

\
 
 \ /
  Last update: 2022-11-02 06:24    [W:0.051 / U:0.300 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site