From nobody Thu Dec 18 02:26:46 2025 Received: from mail-wr1-f47.google.com (mail-wr1-f47.google.com [209.85.221.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A2B9719AD48 for ; Fri, 14 Jun 2024 17:32:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.47 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718386348; cv=none; b=Vn89H6tGbyJJu5XSmo/uEIznhjMDfQ8dZttCc6QMGx19+sGO6IsSQHp03LAQPEy/UPFGeVT4p1foEI1g2O4LqvFKNUOcRaRkGG22Mb3A+o+wawVrk3L5lgC0VPOnKOxF7gGG2nSFPQ2VuLFaqiyIMqYzXqQRugk+6xeX5mqXfek= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718386348; c=relaxed/simple; bh=BTDfLj4AnRVLzvSB2sl6u/qP7TFE0iMJBw7H91ZibCA=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=KGk5RAud66rHw+AuvGSYlIl4vcjJ6mid9lND95EDNo3OhDeqnVaMDnHC2hKNII/V71reSTZLd2qhcJGb0lvD4TadwoCsxgokJ6oVgJzhhe4g3D8jOqFNJNH4U/WoWpDeo17f53b7PFGXaJUK0Vp3s+QX5UO8R3uAzeMRVwAHslE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=g/ng1T67; arc=none smtp.client-ip=209.85.221.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="g/ng1T67" Received: by mail-wr1-f47.google.com with SMTP id ffacd0b85a97d-3608545debbso528078f8f.1 for ; Fri, 14 Jun 2024 10:32:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1718386344; x=1718991144; darn=vger.kernel.org; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=hHcGiX8UBCwxh//a18tmbSzvIIZ91QoZrb+Pr6rgKAk=; b=g/ng1T67W+kDlprcUiw4C9+Y39g//0l3cpj/cSFFq29jpPtW6mGSYCMwvn60vBFZ25 o43MOKo6N7MOZT4Ehc+vMhpm2IyH/ttDd9D4F3SYEjw9R9oRXx2rdJSil9FB5XUVPcvz 6va+q3CMF4gvUzXAHWPUbZ/YPrUAIhf7dunxs9SSk5Pu5cd15KkXNjvXeQiOIMigGXzl Xbz3Y4WXHmkK22gayNEbIX5Ml3/MuXXp0YraotsjYKwArZ5aeAEYGxjC+ubJnRIxhDEZ Mf3nOgguXsmIOpDckPgJsOp8zpyvK7WSB4ruYyoZfUEjV/T57YzDJmaQTlrpvJWhxcmz RrZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718386344; x=1718991144; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=hHcGiX8UBCwxh//a18tmbSzvIIZ91QoZrb+Pr6rgKAk=; b=ObYjYPzENvB+zZkBFb1eXEQNIgjrbiTkvGN/nUhSsNqML76Td/PfLg/9UmUQristAh LflKJNTT/EUELXM7QsgR4FIi9cRbQv60FZ2QIgNHtf3aGELl16jnryMLZwiBS70eE0Fn UBwijtlLDtllkea+ZCqWwAoflIHqyaRyAiuUzun7dOEdl9G818/LkmBYdHlfM1WkLhCV hQKZS+jh1z5RaUko7H2umZ7Ex/VPCtDc+oJid0phfhEKeTVEwLMMdAFLJ0ogGyWvB+QX +pexoOK07kHPo10xNub4y3HPii/zIbksN11WLl0OOXNJB1Y3EJntva1ZGXZMCxHW1JXk hqnQ== X-Forwarded-Encrypted: i=1; AJvYcCVvVVDvVkOrPYBdfHJrjZTHeCxOXnqw+XRRHdtJ0JAfVO4CIHv5T8whTZbaKgtJAtobj8SJcOKw52q0hQ2K8IBG7Crat972s8ov3Pyt X-Gm-Message-State: AOJu0YyfbipQeKjGMMJonIzZBxLooq2beBMwSn3XigHjZnTReUAuCIVm BeSMptwROhk/9iJqDYXScUsP2oSryXUJfbWqwZ8MfaQbCjPxTMiVOzVDe6cUiBA= X-Google-Smtp-Source: AGHT+IHsxqX+vfK6OLdZouSmAaBnwPbFYWG7SuDtV+LLd1ZQ2QpbCa6D9qdoNvt9IQdsKez/NQ86Ww== X-Received: by 2002:a5d:6da6:0:b0:360:83cd:ea2d with SMTP id ffacd0b85a97d-36083cded29mr2374785f8f.24.1718386344226; Fri, 14 Jun 2024 10:32:24 -0700 (PDT) Received: from localhost ([102.222.70.76]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-360751152d9sm5045341f8f.116.2024.06.14.10.32.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Jun 2024 10:32:23 -0700 (PDT) Date: Fri, 14 Jun 2024 20:32:20 +0300 From: Dan Carpenter To: Pradeep Kumar Chitrapu Cc: Kalle Valo , Jeff Johnson , linux-wireless@vger.kernel.org, ath12k@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] wifi: ath12k: fix potential NULL dereference Message-ID: <4428a7ab-eb67-4f0e-992f-35577ea2b564@moroto.mountain> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In this condition if "sband" is NULL then it leads to a NULL dereference on the next line when it does "idx -=3D sband->n_channels;". The condition can just be deleted, because if "sband" is NULL or the "idx" is out of bounds, then the correct thing is to at this point is to return -ENOENT. There are no additional sbands available to try. Fixes: 70e3be54bbdd ("wifi: ath12k: fix survey dump collection in 6 GHz") Signed-off-by: Dan Carpenter --- drivers/net/wireless/ath/ath12k/mac.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/a= th/ath12k/mac.c index 509c02bffdae..e5456383dabd 100644 --- a/drivers/net/wireless/ath/ath12k/mac.c +++ b/drivers/net/wireless/ath/ath12k/mac.c @@ -8314,11 +8314,6 @@ static int ath12k_mac_op_get_survey(struct ieee80211= _hw *hw, int idx, =20 if (!sband) sband =3D hw->wiphy->bands[NL80211_BAND_6GHZ]; - if (!sband || idx >=3D sband->n_channels) { - idx -=3D sband->n_channels; - sband =3D NULL; - } - if (!sband || idx >=3D sband->n_channels) return -ENOENT; =20 --=20 2.43.0