linux-kernel - Re: [PATCH] io_uring/rsrc: Annotate struct io_mapped_ubuf with __counted

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Message-Id: <169232130924.700993.10043093294166679219.b4-ty@kernel.dk>
Date:   Thu, 17 Aug 2023 19:15:09 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Kees Cook <keescook@...omium.org>
Cc:     Pavel Begunkov <asml.silence@...il.com>, io-uring@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] io_uring/rsrc: Annotate struct io_mapped_ubuf with
 __counted_by


On Thu, 17 Aug 2023 14:21:47 -0700, Kees Cook wrote:
> Prepare for the coming implementation by GCC and Clang of the __counted_by
> attribute. Flexible array members annotated with __counted_by can have
> their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
> (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
> functions).
> 
> As found with Coccinelle[1], add __counted_by for struct io_mapped_ubuf.
> 
> [...]

Applied, thanks!

[1/1] io_uring/rsrc: Annotate struct io_mapped_ubuf with __counted_by
      commit: 04d9244c9420db33149608a566399176d57690f8

Best regards,
-- 
Jens Axboe