linux-hardening - Re: [fortify] 54d9469bc5: WARNING:at_net/wireless/wext-core.c:#wireless_send

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Date:   Tue, 11 Oct 2022 08:59:49 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     Kees Cook <keescook@...omium.org>,
        kernel test robot <yujie.liu@...el.com>
Cc:     lkp@...ts.01.org, lkp@...el.com, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Hawkins Jiawei <yin31149@...il.com>,
        linux-wireless@...r.kernel.org
Subject: Re: [fortify] 54d9469bc5:
 WARNING:at_net/wireless/wext-core.c:#wireless_send_event

On Mon, 2022-10-10 at 23:17 -0700, Kees Cook wrote:
> On Tue, Oct 11, 2022 at 11:46:21AM +0800, kernel test robot wrote:
> > commit: 54d9469bc515dc5fcbc20eecbe19cea868b70d68 ("fortify: Add run-time WARN for cross-field memcpy()")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> > [...]
> > caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> > [...]
> > [   95.913726][   T36] memcpy: detected field-spanning write (size 16) of single field "&compat_event->pointer" at net/wireless/wext-core.c:623 (size 4)
> 
> This was fixed with:
> e3e6e1d16a4c ("wifi: wext: use flex array destination for memcpy()")
> 
> I expect this will land before -rc1 closes, but Johannes will know more
> about the schedule.
> 

Yes, we're planning to send a pull request today, so that should go to
Linus with the net pull request tomorrow.

johannes