From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 0E33F263C6D; Tue, 8 Apr 2025 11:41:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744112495; cv=none; b=KkB32MCo12UhQAIQi4V7CzdPcs9krF27K4I845ilHeoqnjO0Ildn1f6M6qQrGZv+z/a37Ap7Gg/eiyUzM4trFAyRr0wswPtrY3fWoqUqicrH6oXcedkGf6dg0foGl6Fl2bEDC+109LeHksoeoe4c+uLzyDWfIGsk/i7ItXq7Zjs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744112495; c=relaxed/simple; bh=iybF2sVI2TfIEFHE/ZG5nVO4CZh9MUV9+VVnGEsqFF4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TFYXjVmu1BLj16nW5CS4IUVbQPoy2YfxkFEF30u9l8BKcmri9ZzDJg+cepMtWpocKAZTvSnh7YlMG3eJz7SpM1NJi1biTLfxefridPiemL31fvup3WY2V/PfpWjnElAVwKTqy2MVPm2THdm+uUfVXNfVhRCUfGSZcjt0ADgMwE8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pw6IFehk; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="pw6IFehk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 922BCC4CEE5; Tue, 8 Apr 2025 11:41:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744112494; bh=iybF2sVI2TfIEFHE/ZG5nVO4CZh9MUV9+VVnGEsqFF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pw6IFehkIk0wQAcwje5qnLf6DqwtvbbUYu08cD8JOARvGzgMSsl++hNt65iiowfNf dmpV9XtqNNMmzZHKBd+jZOzq/HjxNUEF0rpnSzA6iJL0j5fWzJTa8SOPE2NrgwDsDo bcjDToExbmvoY76pcsmlrQndcLDbsxSE4dcUHT0U= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Luiz Augusto von Dentz , Sasha Levin Subject: [PATCH 5.15 090/279] Bluetooth: Fix error code in chan_alloc_skb_cb() Date: Tue, 8 Apr 2025 12:47:53 +0200 Message-ID: <20250408104828.780343687@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250408104826.319283234@linuxfoundation.org> References: <20250408104826.319283234@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter [ Upstream commit 72d061ee630d0dbb45c2920d8d19b3861c413e54 ] The chan_alloc_skb_cb() function is supposed to return error pointers on error. Returning NULL will lead to a NULL dereference. Fixes: 6b8d4a6a0314 ("Bluetooth: 6LoWPAN: Use connected oriented channel instead of fixed one") Signed-off-by: Dan Carpenter Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin --- net/bluetooth/6lowpan.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index 580b0940f067a..c4a1b478cf3e9 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -824,11 +824,16 @@ static struct sk_buff *chan_alloc_skb_cb(struct l2cap_chan *chan, unsigned long hdr_len, unsigned long len, int nb) { + struct sk_buff *skb; + /* Note that we must allocate using GFP_ATOMIC here as * this function is called originally from netdev hard xmit * function in atomic context. */ - return bt_skb_alloc(hdr_len + len, GFP_ATOMIC); + skb = bt_skb_alloc(hdr_len + len, GFP_ATOMIC); + if (!skb) + return ERR_PTR(-ENOMEM); + return skb; } static void chan_suspend_cb(struct l2cap_chan *chan) -- 2.39.5