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From: Jakub Kicinski <kuba@kernel.org>
To: kvalo@kernel.org, johannes@sipsolutions.net
Cc: netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
	Jakub Kicinski <kuba@kernel.org>,
	aspriel@gmail.com, franky.lin@broadcom.com,
	hante.meuleman@broadcom.com, ALSI@bang-olufsen.dk,
	brcm80211-dev-list.pdl@broadcom.com,
	SHA-cyfmac-dev-list@infineon.com
Subject: [PATCH net-next 6/8] wifi: brcmfmac: work around a GCC 12 -Warray-bounds warning
Date: Fri, 20 May 2022 12:43:18 -0700	[thread overview]
Message-ID: <20220520194320.2356236-7-kuba@kernel.org> (raw)
In-Reply-To: <20220520194320.2356236-1-kuba@kernel.org>

GCC 12 really doesn't like partial struct allocations:

drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:2202:32: warning: array subscript ‘struct brcmf_ext_join_params_le[0]’ is partly outside array bounds of ‘void[70]’ [-Warray-bounds]
 2202 |                 ext_join_params->scan_le.passive_time =
      |                                ^~

brcmfmac is trying to save 2 bytes at the end by either allocating
or not allocating a channel member. Let's keep @join_params_size
the "right" size but kmalloc() the full structure.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: aspriel@gmail.com
CC: franky.lin@broadcom.com
CC: hante.meuleman@broadcom.com
CC: kvalo@kernel.org
CC: ALSI@bang-olufsen.dk
CC: linux-wireless@vger.kernel.org
CC: brcm80211-dev-list.pdl@broadcom.com
CC: SHA-cyfmac-dev-list@infineon.com
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 360b103fe898..605206abe424 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -2167,7 +2167,7 @@ brcmf_cfg80211_connect(struct wiphy *wiphy, struct net_device *ndev,
 		offsetof(struct brcmf_assoc_params_le, chanspec_list);
 	if (cfg->channel)
 		join_params_size += sizeof(u16);
-	ext_join_params = kzalloc(join_params_size, GFP_KERNEL);
+	ext_join_params = kzalloc(sizeof(*ext_join_params), GFP_KERNEL);
 	if (ext_join_params == NULL) {
 		err = -ENOMEM;
 		goto done;
-- 
2.34.3


  parent reply	other threads:[~2022-05-20 19:43 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-20 19:43 [PATCH net-next 0/8] Fix/silence GCC 12 warnings in drivers/net/wireless/ Jakub Kicinski
2022-05-20 19:43 ` [PATCH net-next 1/8] wifi: plfxlc: remove redundant NULL-check for GCC 12 Jakub Kicinski
2022-05-20 19:43 ` [PATCH net-next 2/8] wifi: ath9k: silence array-bounds warning on " Jakub Kicinski
2022-05-21  6:58   ` Kalle Valo
2022-05-21 17:53     ` Jakub Kicinski
2022-05-22 12:06       ` Kalle Valo
2022-05-23 19:31     ` Kees Cook
2022-05-20 19:43 ` [PATCH net-next 3/8] wifi: rtlwifi: remove always-true condition pointed out by " Jakub Kicinski
2022-05-23  2:35   ` Ping-Ke Shih
2022-05-23 15:57     ` Jakub Kicinski
2022-05-24  0:41       ` Ping-Ke Shih
2022-05-20 19:43 ` [PATCH net-next 4/8] wifi: ath6k: silence false positive -Wno-dangling-pointer warning on " Jakub Kicinski
2022-05-20 19:43 ` [PATCH net-next 5/8] wifi: iwlwifi: use unsigned to silence a GCC 12 warning Jakub Kicinski
2022-05-20 19:43 ` Jakub Kicinski [this message]
2022-05-20 19:43 ` [PATCH net-next 7/8] wifi: libertas: silence a GCC 12 -Warray-bounds warning Jakub Kicinski
2022-05-21 22:03   ` Johannes Berg
2022-05-22 16:56     ` Jakub Kicinski
2022-05-20 19:43 ` [PATCH net-next 8/8] wifi: carl9170: " Jakub Kicinski
2022-05-20 19:58   ` Christian Lamparter
2022-05-22 12:19 ` [PATCH net-next 0/8] Fix/silence GCC 12 warnings in drivers/net/wireless/ Kalle Valo

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