From: Kees Cook <kees@kernel.org>
To: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>,
akpm@linux-foundation.org, nathan@kernel.org,
ndesaulniers@google.com, morbo@google.com,
justinstitt@google.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
kernel test robot <lkp@intel.com>
Subject: Re: [PATCH 1/1] alloc_tag: work around clang-14 issue with __builtin_object_size()
Date: Wed, 5 Feb 2025 13:28:36 -0800 [thread overview]
Message-ID: <202502051327.AE8C0706@keescook> (raw)
In-Reply-To: <jdnvctbd4kfzgjy4s4wpd24zpv66zsn3cjgnsialjbnrl3oa4e@vexb7u4ku2tr>
On Wed, Feb 05, 2025 at 03:16:12PM -0500, Kent Overstreet wrote:
> ARRAY_SIZE() is sizeof() underneath, just used creatively to guarantee
> that the input is an array - although that property is probably what we
> want here, since strtomem_pad() really only makes sense on static or
> flex-arrays, no?
Exactly. strtomem*/memtostr* are very picky about the destination being
compile-time sized, so sizeof() under the hood seems correct. I'm making
my way through testing a patch now...
--
Kees Cook
next prev parent reply other threads:[~2025-02-05 21:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-01 20:05 [PATCH 1/1] alloc_tag: work around clang-14 issue with __builtin_object_size() Suren Baghdasaryan
2025-02-05 19:18 ` Kees Cook
2025-02-05 19:57 ` Nathan Chancellor
2025-02-05 20:16 ` Kent Overstreet
2025-02-05 21:28 ` Kees Cook [this message]
2025-02-06 18:13 ` Kees Cook
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