From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4680453FD28; Wed, 23 Sep 2026 14:46:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790174820; cv=none; b=Y/XeXjMnoqOBqCswWI/Bs7WmEOxHARlSlKqN+vwZVeUDOADQTKpW+lJSBI0JvjteJ/cXbQxPvN6gn3V+oxrU47wEGriyznwLvjvaQ8fsJDLKSlLK7hXVMB838GGDMk1u0ui+1gwTSAtyFnfIksmwzUcwSIvwqYk1k573b/uSGsw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790174820; c=relaxed/simple; bh=bHGFKYpTXeYBcvAFvq0IbVe1o8Jk7L535fhfCb+LGjg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UMv08KYG2UVhMoJ6/s4At0odDXrh8lt5KCmPFuuaSCiqgd0nfyhBpVkipQGZqmHiAg0DbVSPmq0jekfbvDkqR9ISYEq9Saig5/+Qt5hRLy8FTeDW0RaJP07WCNeyw2NEMUxfuc83v6YUCo/wsm9xMj7YCkvpFkXHb6N1yXlzSDo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=BI7oOOF/; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="BI7oOOF/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 750241F00893; Wed, 23 Sep 2026 14:46:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790174819; bh=Raowu7Sj3/36u5enggo8se1MyuVte4sNumkfXJ9neo0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=BI7oOOF/vcKOQs1jZMX3PuxsED6+TBvhursA4yC4mxvB7N3ozV8n4zxvKC374rmym +hF1+XyP8BOkp8+noGYepVe+mnB/4ijEuAhTwJYcOkYy6EPXvBjCTWjBafWF7IWe4I +WcZspuia8gEZ3LPyH0KNnmegFraLjDh+nEHFrwo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Luiz Augusto von Dentz , Laxman Acharya Padhya , Luiz Augusto von Dentz Subject: [PATCH 6.18 235/398] Bluetooth: hci_codec: validate vendor codec count length Date: Wed, 23 Sep 2026 16:05:09 +0200 Message-ID: <20260923140649.509102892@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260923140643.441954610@linuxfoundation.org> References: <20260923140643.441954610@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Laxman Acharya Padhya commit d0795cfd6f655f4de84868a4f4bb41a03f037b3d upstream. The Read Local Supported Codecs parsers consume the variable-sized standard codec array before parsing the vendor codec count. Although the initial reply-size check includes a vendor count byte in the fixed layout, it does not guarantee that the byte remains after the standard codec array. If a controller reply ends immediately after that array, calculating the vendor codec array size reads vnd_codecs->num beyond the skb data. Use skb_pull_data() to validate and consume each codec header before using its count in both command variants. Fixes: 8961987f3f5f ("Bluetooth: Enumerate local supported codec and cache details") Fixes: 9ae664028a9e ("Bluetooth: Add support for Read Local Supported Codecs V2") Cc: stable@vger.kernel.org Suggested-by: Luiz Augusto von Dentz Signed-off-by: Laxman Acharya Padhya Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Greg Kroah-Hartman --- net/bluetooth/hci_codec.c | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) --- a/net/bluetooth/hci_codec.c +++ b/net/bluetooth/hci_codec.c @@ -145,11 +145,12 @@ void hci_read_supported_codecs(struct hc skb_pull(skb, sizeof(rp->status)); - std_codecs = (void *)skb->data; + std_codecs = skb_pull_data(skb, sizeof(*std_codecs)); + if (!std_codecs) + goto error; /* validate codecs length before accessing */ - if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num) - + sizeof(std_codecs->num)) + if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)) goto error; /* enumerate codec capabilities of standard codecs */ @@ -161,15 +162,14 @@ void hci_read_supported_codecs(struct hc LOCAL_CODEC_ACL_MASK | LOCAL_CODEC_SCO_MASK, &caps); } - skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num) - + sizeof(std_codecs->num)); + skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)); - vnd_codecs = (void *)skb->data; + vnd_codecs = skb_pull_data(skb, sizeof(*vnd_codecs)); + if (!vnd_codecs) + goto error; /* validate vendor codecs length before accessing */ - if (skb->len < - flex_array_size(vnd_codecs, codec, vnd_codecs->num) - + sizeof(vnd_codecs->num)) + if (skb->len < flex_array_size(vnd_codecs, codec, vnd_codecs->num)) goto error; /* enumerate vendor codec capabilities */ @@ -214,11 +214,12 @@ void hci_read_supported_codecs_v2(struct skb_pull(skb, sizeof(rp->status)); - std_codecs = (void *)skb->data; + std_codecs = skb_pull_data(skb, sizeof(*std_codecs)); + if (!std_codecs) + goto error; /* check for payload data length before accessing */ - if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num) - + sizeof(std_codecs->num)) + if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)) goto error; memset(&caps, 0, sizeof(caps)); @@ -229,15 +230,14 @@ void hci_read_supported_codecs_v2(struct &caps); } - skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num) - + sizeof(std_codecs->num)); + skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)); - vnd_codecs = (void *)skb->data; + vnd_codecs = skb_pull_data(skb, sizeof(*vnd_codecs)); + if (!vnd_codecs) + goto error; /* check for payload data length before accessing */ - if (skb->len < - flex_array_size(vnd_codecs, codec, vnd_codecs->num) - + sizeof(vnd_codecs->num)) + if (skb->len < flex_array_size(vnd_codecs, codec, vnd_codecs->num)) goto error; for (i = 0; i < vnd_codecs->num; i++) {