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Date: Wed, 18 Aug 2021 09:35:52 +0300 From: Nikolay Borisov <nborisov@...e.com> To: Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org Cc: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org, "Gustavo A. R. Silva" <gustavoars@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Andrew Morton <akpm@...ux-foundation.org>, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, dri-devel@...ts.freedesktop.org, linux-staging@...ts.linux.dev, linux-block@...r.kernel.org, linux-kbuild@...r.kernel.org, clang-built-linux@...glegroups.com, Rasmus Villemoes <linux@...musvillemoes.dk>, linux-hardening@...r.kernel.org Subject: Re: [PATCH v2 49/63] btrfs: Use memset_startat() to clear end of struct On 18.08.21 г. 9:05, Kees Cook wrote: > In preparation for FORTIFY_SOURCE performing compile-time and run-time > field bounds checking for memset(), avoid intentionally writing across > neighboring fields. > > Use memset_startat() so memset() doesn't get confused about writing > beyond the destination member that is intended to be the starting point > of zeroing through the end of the struct. > > Cc: Chris Mason <clm@...com> > Cc: Josef Bacik <josef@...icpanda.com> > Cc: David Sterba <dsterba@...e.com> > Cc: linux-btrfs@...r.kernel.org > Signed-off-by: Kees Cook <keescook@...omium.org> Reviewed-by: Nikolay Borisov <nborisov@...e.com>
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