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Message-ID: <20231009225039.GX28758@twin.jikos.cz> Date: Tue, 10 Oct 2023 00:50:39 +0200 From: David Sterba <dsterba@...e.cz> To: "Gustavo A. R. Silva" <gustavoars@...nel.org> Cc: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org Subject: Re: [PATCH][next] btrfs: Add __counted_by for struct btrfs_delayed_item and use struct_size() On Mon, Oct 09, 2023 at 02:44:54PM -0600, Gustavo A. R. Silva 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 via CONFIG_UBSAN_BOUNDS (for > array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > While there, use struct_size() helper, instead of the open-coded > version, to calculate the size for the allocation of the whole > flexible structure, including of course, the flexible-array member. > > This code was found with the help of Coccinelle, and audited and > fixed manually. > > Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org> Added to misc-next, thanks.
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