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Date: Tue, 12 May 2020 07:33:42 +0000 (UTC) From: Kalle Valo <kvalo@...eaurora.org> To: Arnd Bergmann <arnd@...db.de> Cc: Arnd Bergmann <arnd@...db.de>, "Gustavo A. R. Silva" <gustavo@...eddedor.com>, Michal Kazior <michal.kazior@...to.com>, Kalle Valo <kvalo@....qualcomm.com>, "David S. Miller" <davem@...emloft.net>, Wen Gong <wgong@...eaurora.org>, Erik Stromdahl <erik.stromdahl@...il.com>, ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net-next 1/2] ath10k: fix gcc-10 zero-length-bounds warnings Arnd Bergmann <arnd@...db.de> wrote: > gcc-10 started warning about out-of-bounds access for zero-length > arrays: > > In file included from drivers/net/wireless/ath/ath10k/core.h:18, > from drivers/net/wireless/ath/ath10k/htt_rx.c:8: > drivers/net/wireless/ath/ath10k/htt_rx.c: In function 'ath10k_htt_rx_tx_fetch_ind': > drivers/net/wireless/ath/ath10k/htt.h:1683:17: warning: array subscript 65535 is outside the bounds of an interior zero-length array 'struct htt_tx_fetch_record[0]' [-Wzero-length-bounds] > 1683 | return (void *)&ind->records[le16_to_cpu(ind->num_records)]; > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/net/wireless/ath/ath10k/htt.h:1676:29: note: while referencing 'records' > 1676 | struct htt_tx_fetch_record records[0]; > | ^~~~~~~ > > Make records[] a flexible array member to allow this, moving it behind > the other zero-length member that is not accessed in a way that gcc > warns about. > > Fixes: 22e6b3bc5d96 ("ath10k: add new htt definitions") > Signed-off-by: Arnd Bergmann <arnd@...db.de> > Signed-off-by: Kalle Valo <kvalo@...eaurora.org> 2 patches applied to ath-next branch of ath.git, thanks. 9f12bebd512c ath10k: fix gcc-10 zero-length-bounds warnings 32221df6765b ath10k: fix ath10k_pci struct layout -- https://patchwork.kernel.org/patch/11538233/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
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