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 234AA63B8 for ; Mon, 20 Feb 2023 13:55:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F433C433D2; Mon, 20 Feb 2023 13:55:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1676901341; bh=QYOMXxW6MI0jTvO1e9bAtG5DCvXWueu5rx02ZljLFUo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jm7Ssh7pj11b09lTg/5o3Lk8aLlqv4eeDJHHmJNU5Xg0AO99XejC7XdeApcKwo+Fc MeoGqb1seHtqJqyrPUPXzdhmCQpexRCXsu+jKfEFLIkJCO5uEYfCeI4QDWBcVyv1wK rTtb6XVuujHSZm68ZfJXJXsIxP5aVlMkRBl8BB0Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Miko Larsson , Alexander Duyck , "David S. Miller" , syzbot+cd80c5ef5121bfe85b55@syzkaller.appspotmail.com Subject: [PATCH 5.10 37/57] net/usb: kalmia: Dont pass act_len in usb_bulk_msg error path Date: Mon, 20 Feb 2023 14:36:45 +0100 Message-Id: <20230220133550.643970789@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230220133549.360169435@linuxfoundation.org> References: <20230220133549.360169435@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Miko Larsson commit c68f345b7c425b38656e1791a0486769a8797016 upstream. syzbot reported that act_len in kalmia_send_init_packet() is uninitialized when passing it to the first usb_bulk_msg error path. Jiri Pirko noted that it's pointless to pass it in the error path, and that the value that would be printed in the second error path would be the value of act_len from the first call to usb_bulk_msg.[1] With this in mind, let's just not pass act_len to the usb_bulk_msg error paths. 1: https://lore.kernel.org/lkml/Y9pY61y1nwTuzMOa@nanopsycho/ Fixes: d40261236e8e ("net/usb: Add Samsung Kalmia driver for Samsung GT-B3730") Reported-and-tested-by: syzbot+cd80c5ef5121bfe85b55@syzkaller.appspotmail.com Signed-off-by: Miko Larsson Reviewed-by: Alexander Duyck Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/usb/kalmia.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/net/usb/kalmia.c +++ b/drivers/net/usb/kalmia.c @@ -65,8 +65,8 @@ kalmia_send_init_packet(struct usbnet *d init_msg, init_msg_len, &act_len, KALMIA_USB_TIMEOUT); if (status != 0) { netdev_err(dev->net, - "Error sending init packet. Status %i, length %i\n", - status, act_len); + "Error sending init packet. Status %i\n", + status); return status; } else if (act_len != init_msg_len) { @@ -83,8 +83,8 @@ kalmia_send_init_packet(struct usbnet *d if (status != 0) netdev_err(dev->net, - "Error receiving init result. Status %i, length %i\n", - status, act_len); + "Error receiving init result. Status %i\n", + status); else if (act_len != expected_len) netdev_err(dev->net, "Unexpected init result length: %i\n", act_len);