linux-kernel - [PATCH 5.15 179/913] brcmfmac: firmware: Allocate space for default boardrev in nvram

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Date:   Tue,  5 Apr 2022 09:20:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Arend van Spriel <arend.vanspriel@...adcom.com>,
        Hector Martin <marcan@...can.st>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Kalle Valo <kvalo@...nel.org>
Subject: [PATCH 5.15 179/913] brcmfmac: firmware: Allocate space for default boardrev in nvram

From: Hector Martin <marcan@...can.st>

commit d19d8e3ba256f81ea4a27209dbbd1f0a00ef1903 upstream.

If boardrev is missing from the NVRAM we add a default one, but this
might need more space in the output buffer than was allocated. Ensure
we have enough padding for this in the buffer.

Fixes: 46f2b38a91b0 ("brcmfmac: insert default boardrev in nvram data if missing")
Reviewed-by: Arend van Spriel <arend.vanspriel@...adcom.com>
Cc: stable@...r.kernel.org
Signed-off-by: Hector Martin <marcan@...can.st>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Signed-off-by: Kalle Valo <kvalo@...nel.org>
Link: https://lore.kernel.org/r/20220131160713.245637-3-marcan@marcan.st
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
@@ -207,6 +207,8 @@ static int brcmf_init_nvram_parser(struc
 		size = BRCMF_FW_MAX_NVRAM_SIZE;
 	else
 		size = data_len;
+	/* Add space for properties we may add */
+	size += strlen(BRCMF_FW_DEFAULT_BOARDREV) + 1;
 	/* Alloc for extra 0 byte + roundup by 4 + length field */
 	size += 1 + 3 + sizeof(u32);
 	nvp->nvram = kzalloc(size, GFP_KERNEL);