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Date: Tue, 28 Jun 2022 15:44:04 -0300 From: Jason Gunthorpe <jgg@...pe.ca> To: Kees Cook <keescook@...omium.org> Cc: Daniel Borkmann <daniel@...earbox.net>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-kernel@...r.kernel.org, x86@...nel.org, dm-devel@...hat.com, linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org, linux-s390@...r.kernel.org, kvm@...r.kernel.org, intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, netdev@...r.kernel.org, bpf@...r.kernel.org, linux-btrfs@...r.kernel.org, linux-can@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux1394-devel@...ts.sourceforge.net, io-uring@...r.kernel.org, lvs-devel@...r.kernel.org, linux-mtd@...ts.infradead.org, kasan-dev@...glegroups.com, linux-mmc@...r.kernel.org, nvdimm@...ts.linux.dev, netfilter-devel@...r.kernel.org, coreteam@...filter.org, linux-perf-users@...r.kernel.org, linux-raid@...r.kernel.org, linux-sctp@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org, linux-scsi@...r.kernel.org, target-devel@...r.kernel.org, linux-usb@...r.kernel.org, virtualization@...ts.linux-foundation.org, v9fs-developer@...ts.sourceforge.net, linux-rdma@...r.kernel.org, alsa-devel@...a-project.org, linux-hardening@...r.kernel.org Subject: Re: [PATCH][next] treewide: uapi: Replace zero-length arrays with flexible-array members On Tue, Jun 28, 2022 at 10:54:58AM -0700, Kees Cook wrote: > which must also be assuming it's a header. So probably better to just > drop the driver_data field? I don't see anything using it (that I can > find) besides as a sanity-check that the field exists and is at the end > of the struct. The field is guaranteeing alignment of the following structure. IIRC there are a few cases that we don't have a u64 already to force this. Jason
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