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Date: Mon, 10 Oct 2022 19:54:29 +0300
From: Kalle Valo <kvalo@...nel.org>
To: Naresh Kamboju <naresh.kamboju@...aro.org>,
Arnd Bergmann <arnd@...db.de>
Cc: Netdev <netdev@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>,
linux-wireless@...r.kernel.org,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, ath11k@...ts.infradead.org,
regressions@...ts.linux.dev, lkft-triage@...ts.linaro.org
Subject: Re: drivers/net/wireless/ath/ath11k/mac.c:2238:29: warning: 'ath11k_peer_assoc_h_he_limit' reading 16 bytes from a region of size 0
+ arnd
Naresh Kamboju <naresh.kamboju@...aro.org> writes:
> Following build warnings noticed while building arm64 on Linux next-20220921
>
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>
> In function 'ath11k_peer_assoc_h_he',
> inlined from 'ath11k_peer_assoc_prepare' at
> drivers/net/wireless/ath/ath11k/mac.c:2662:2:
> drivers/net/wireless/ath/ath11k/mac.c:2238:29: warning:
> 'ath11k_peer_assoc_h_he_limit' reading 16 bytes from a region of size
> 0 [-Wstringop-overread]
> 2238 | v = ath11k_peer_assoc_h_he_limit(v,
> he_mcs_mask);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/net/wireless/ath/ath11k/mac.c: In function 'ath11k_peer_assoc_prepare':
> drivers/net/wireless/ath/ath11k/mac.c:2238:29: note: referencing
> argument 2 of type 'const u16 *' {aka 'const short unsigned int *'}
> drivers/net/wireless/ath/ath11k/mac.c:2019:12: note: in a call to
> function 'ath11k_peer_assoc_h_he_limit'
> 2019 | static u16 ath11k_peer_assoc_h_he_limit(u16 tx_mcs_set,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In function 'ath11k_peer_assoc_h_he',
> inlined from 'ath11k_peer_assoc_prepare' at
> drivers/net/wireless/ath/ath11k/mac.c:2662:2:
> drivers/net/wireless/ath/ath11k/mac.c:2251:21: warning:
> 'ath11k_peer_assoc_h_he_limit' reading 16 bytes from a region of size
> 0 [-Wstringop-overread]
> 2251 | v = ath11k_peer_assoc_h_he_limit(v, he_mcs_mask);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/net/wireless/ath/ath11k/mac.c: In function 'ath11k_peer_assoc_prepare':
> drivers/net/wireless/ath/ath11k/mac.c:2251:21: note: referencing
> argument 2 of type 'const u16 *' {aka 'const short unsigned int *'}
> drivers/net/wireless/ath/ath11k/mac.c:2019:12: note: in a call to
> function 'ath11k_peer_assoc_h_he_limit'
> 2019 | static u16 ath11k_peer_assoc_h_he_limit(u16 tx_mcs_set,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In function 'ath11k_peer_assoc_h_he',
> inlined from 'ath11k_peer_assoc_prepare' at
> drivers/net/wireless/ath/ath11k/mac.c:2662:2:
> drivers/net/wireless/ath/ath11k/mac.c:2264:21: warning:
> 'ath11k_peer_assoc_h_he_limit' reading 16 bytes from a region of size
> 0 [-Wstringop-overread]
> 2264 | v = ath11k_peer_assoc_h_he_limit(v, he_mcs_mask);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/net/wireless/ath/ath11k/mac.c: In function 'ath11k_peer_assoc_prepare':
> drivers/net/wireless/ath/ath11k/mac.c:2264:21: note: referencing
> argument 2 of type 'const u16 *' {aka 'const short unsigned int *'}
> drivers/net/wireless/ath/ath11k/mac.c:2019:12: note: in a call to
> function 'ath11k_peer_assoc_h_he_limit'
> 2019 | static u16 ath11k_peer_assoc_h_he_limit(u16 tx_mcs_set,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In function 'ath11k_peer_assoc_h_he',
> inlined from 'ath11k_peer_assoc_prepare' at
> drivers/net/wireless/ath/ath11k/mac.c:2662:2:
> drivers/net/wireless/ath/ath11k/mac.c:2264:21: warning:
> 'ath11k_peer_assoc_h_he_limit' reading 16 bytes from a region of size
> 0 [-Wstringop-overread]
> 2264 | v = ath11k_peer_assoc_h_he_limit(v, he_mcs_mask);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/net/wireless/ath/ath11k/mac.c: In function 'ath11k_peer_assoc_prepare':
> drivers/net/wireless/ath/ath11k/mac.c:2264:21: note: referencing
> argument 2 of type 'const u16 *' {aka 'const short unsigned int *'}
> drivers/net/wireless/ath/ath11k/mac.c:2019:12: note: in a call to
> function 'ath11k_peer_assoc_h_he_limit'
> 2019 | static u16 ath11k_peer_assoc_h_he_limit(u16 tx_mcs_set,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In function 'ath11k_peer_assoc_h_he',
> inlined from 'ath11k_peer_assoc_prepare' at
> drivers/net/wireless/ath/ath11k/mac.c:2662:2:
> drivers/net/wireless/ath/ath11k/mac.c:2264:21: warning:
> 'ath11k_peer_assoc_h_he_limit' reading 16 bytes from a region of size
> 0 [-Wstringop-overread]
> 2264 | v = ath11k_peer_assoc_h_he_limit(v, he_mcs_mask);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/net/wireless/ath/ath11k/mac.c: In function 'ath11k_peer_assoc_prepare':
> drivers/net/wireless/ath/ath11k/mac.c:2264:21: note: referencing
> argument 2 of type 'const u16 *' {aka 'const short unsigned int *'}
> drivers/net/wireless/ath/ath11k/mac.c:2019:12: note: in a call to
> function 'ath11k_peer_assoc_h_he_limit'
> 2019 | static u16 ath11k_peer_assoc_h_he_limit(u16 tx_mcs_set,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In function 'ath11k_peer_assoc_h_he',
> inlined from 'ath11k_peer_assoc_prepare' at
> drivers/net/wireless/ath/ath11k/mac.c:2662:2:
> drivers/net/wireless/ath/ath11k/mac.c:2251:21: warning:
> 'ath11k_peer_assoc_h_he_limit' reading 16 bytes from a region of size
> 0 [-Wstringop-overread]
> 2251 | v = ath11k_peer_assoc_h_he_limit(v, he_mcs_mask);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/net/wireless/ath/ath11k/mac.c: In function 'ath11k_peer_assoc_prepare':
> drivers/net/wireless/ath/ath11k/mac.c:2251:21: note: referencing
> argument 2 of type 'const u16 *' {aka 'const short unsigned int *'}
> drivers/net/wireless/ath/ath11k/mac.c:2019:12: note: in a call to
> function 'ath11k_peer_assoc_h_he_limit'
> 2019 | static u16 ath11k_peer_assoc_h_he_limit(u16 tx_mcs_set,
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Build log: https://builds.tuxbuild.com/2F4W7nZHNx3T88RB0gaCZ9hBX6c/
Thanks, I was able to reproduce it now and submitted a patch:
https://patchwork.kernel.org/project/linux-wireless/patch/20221010160638.20152-1-kvalo@kernel.org/
But it's strange that nobody else (myself included) didn't see this
earlier. Nor later for that matter, this is the only report I got about
this. Arnd, any ideas what could cause this only to happen on GCC 11?
--
https://patchwork.kernel.org/project/linux-wireless/list/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
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