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Mon, 14 Apr 2025 02:44:18 -0700 (PDT) Received: from [10.176.68.80] ([192.19.176.227]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-2d096cd262asm2314652fac.35.2025.04.14.02.44.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 14 Apr 2025 02:44:17 -0700 (PDT) Message-ID: <282afdd9-bb71-40f8-bfa9-bc7e57e1957d@broadcom.com> Date: Mon, 14 Apr 2025 11:44:12 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RESEND] brcm80211: fmac: Add error handling for brcmf_usb_dl_writeimage() To: Wentao Liang , kvalo@kernel.org Cc: jacobe.zang@wesion.com, sebastian.reichel@collabora.com, christophe.jaillet@wanadoo.fr, erick.archer@outlook.com, linux-wireless@vger.kernel.org, brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20250414072058.2222-1-vulab@iscas.ac.cn> Content-Language: en-US From: Arend van Spriel Autocrypt: addr=arend.vanspriel@broadcom.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 4/14/2025 9:20 AM, Wentao Liang wrote: > The function brcmf_usb_dl_writeimage() calls the function > brcmf_usb_dl_cmd() but dose not check its return value. The > 'state.state' and the 'state.bytes' are uninitialized if the > function brcmf_usb_dl_cmd() fails. It is dangerous to use > uninitialized variables in the conditions. > > Add error handling for brcmf_usb_dl_cmd() to jump to error > handling path if the brcmf_usb_dl_cmd() fails and the > 'state.state' and the 'state.bytes' are uninitialized. Agree. Have one request though... Just below the code you touched the USB bootloader state is checked: /* 2) Check we are in the Waiting state */ if (rdlstate != DL_WAITING) { - brcmf_err("Failed to DL_START\n"); + brcmf_err("Invalid DL state: %u\n", rdlstate); err = -EINVAL; goto fail; } Can you improve the error message as suggested. Regards, Arend > Fixes: 71bb244ba2fd ("brcm80211: fmac: add USB support for bcm43235/6/8 chipsets") > Cc: stable@vger.kernel.org # v3.4+ > Signed-off-by: Wentao Liang > --- > drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-)