From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Kalle Valo <kvalo@codeaurora.org>,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>,
Michal Kazior <michal.kazior@tieto.com>,
Kalle Valo <kvalo@qca.qualcomm.com>,
"David S. Miller" <davem@davemloft.net>,
Wen Gong <wgong@codeaurora.org>,
Erik Stromdahl <erik.stromdahl@gmail.com>,
ath10k@lists.infradead.org, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next 1/2] ath10k: fix gcc-10 zero-length-bounds warnings
Date: Sat, 9 May 2020 10:48:18 -0500 [thread overview]
Message-ID: <20200509154818.GB27779@embeddedor> (raw)
In-Reply-To: <20200509120707.188595-1-arnd@arndb.de>
Arnd,
On Sat, May 09, 2020 at 02:06:32PM +0200, Arnd Bergmann 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: 3ba225b506a2 ("treewide: Replace zero-length array with flexible-array member")
This treewide patch no longer contains changes for ath10k. I removed them
since Monday (05/04/2020). So, this "Fixes" tag does not apply.
Thanks
--
Gustavo
> Fixes: 22e6b3bc5d96 ("ath10k: add new htt definitions")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> drivers/net/wireless/ath/ath10k/htt.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h
> index 8f3710cf28f4..aa056a186402 100644
> --- a/drivers/net/wireless/ath/ath10k/htt.h
> +++ b/drivers/net/wireless/ath/ath10k/htt.h
> @@ -1673,8 +1673,8 @@ struct htt_tx_fetch_ind {
> __le32 token;
> __le16 num_resp_ids;
> __le16 num_records;
> - struct htt_tx_fetch_record records[0];
> __le32 resp_ids[0]; /* ath10k_htt_get_tx_fetch_ind_resp_ids() */
> + struct htt_tx_fetch_record records[];
> } __packed;
>
> static inline void *
> --
> 2.26.0
>
next prev parent reply other threads:[~2020-05-09 15:43 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-09 12:06 [PATCH net-next 1/2] ath10k: fix gcc-10 zero-length-bounds warnings Arnd Bergmann
2020-05-09 12:06 ` [PATCH net-next 2/2] ath10k: fix ath10k_pci struct layout Arnd Bergmann
2020-05-11 12:05 ` Kalle Valo
2020-05-11 12:17 ` Kalle Valo
2020-05-11 12:39 ` Arnd Bergmann
2020-05-13 6:50 ` gcc-10: kernel stack is corrupted and fails to boot Kalle Valo
2020-05-13 8:49 ` Arnd Bergmann
2020-05-13 12:45 ` Kalle Valo
2020-05-13 13:45 ` Arnd Bergmann
2020-05-13 15:31 ` Kalle Valo
2020-05-13 16:00 ` Arnd Bergmann
2020-05-13 16:07 ` David Laight
2020-05-14 9:13 ` Harald Arnesen
2020-05-13 15:48 ` Arvind Sankar
2020-05-13 21:28 ` Arnd Bergmann
2020-05-13 21:41 ` Borislav Petkov
2020-05-13 21:49 ` Arnd Bergmann
2020-05-13 22:20 ` Borislav Petkov
2020-05-13 22:51 ` Arvind Sankar
2020-05-13 23:13 ` Linus Torvalds
2020-05-13 23:36 ` Borislav Petkov
2020-05-14 0:11 ` Linus Torvalds
2020-05-14 0:51 ` Nick Desaulniers
2020-05-14 2:20 ` Linus Torvalds
2020-05-14 3:50 ` Andy Lutomirski
[not found] ` <CAHk-=wgiGxRgJGS-zyer1C_x2MQUVo6iZn0=aJyuFTqJWk-mpA@mail.gmail.com>
2020-05-14 5:22 ` Arvind Sankar
2020-05-14 8:40 ` Arnd Bergmann
2020-05-14 13:27 ` [PATCH] x86: Fix early boot crash on gcc-10, third try Borislav Petkov
2020-05-14 14:45 ` Kalle Valo
2020-05-14 15:50 ` gcc-10: kernel stack is corrupted and fails to boot Arvind Sankar
2020-05-14 8:11 ` David Laight
2020-05-13 23:07 ` Linus Torvalds
2020-05-09 15:48 ` Gustavo A. R. Silva [this message]
2020-05-11 12:02 ` [PATCH net-next 1/2] ath10k: fix gcc-10 zero-length-bounds warnings Kalle Valo
2020-05-11 12:46 ` Arnd Bergmann
2020-05-11 13:09 ` Kalle Valo
2020-05-11 13:47 ` Arnd Bergmann
2020-05-12 7:33 ` Kalle Valo
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