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 00FE5297103; Mon, 12 May 2025 18:10:51 +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=1747073452; cv=none; b=SgqX6sWz8DE3H6LppEIg7ImxdH85edRfAQ89hhTm5M9PU2rveiOdS83nmROgfResxy/S2FbmLhOVxhHwx5A4QrEu6tOhd9aDE1EkG0712iscuXnQzoJwUT2n0ckZoVmDP9aubXIEZapxyCr+TVyfAihutXz6B114Ugi5jmML3Ik= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747073452; c=relaxed/simple; bh=8+LDdA5qbDDLPRaJ2UfwJLaboqSPY1J88KmZ+YlXveA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fk26wn3/nSUAquDIbWa/4Cvs4iQG7lLjzoA9/S+dheNrVoOGcUQYCkgGmX0Bwk6Ywj0xPqFAFgjqPv5bKdZpCLmfv8oaalJHlaUaxyrGj7dE1UFNRx59bck5bYfMcAlMqYmsdyy+JMPTgxUFyWpcIl65acL4XdJMjf0JWJYpUZM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XtdCn20z; 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="XtdCn20z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B0B1C4CEE9; Mon, 12 May 2025 18:10:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1747073451; bh=8+LDdA5qbDDLPRaJ2UfwJLaboqSPY1J88KmZ+YlXveA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XtdCn20zy4DjxpS/lgisPHX0agAilTV/U+vjx2Z+8+zxxkWg8TleSQ773jPzewnBc wL4zKLTDj+GhEYXj5R8RPdNwJqYmKVad8UYJ+J3fJIZwK7h8RobcSbc8jVZun+a5/i widPdlMHnWP0YPdI5g/ZkM+hS9FNsGuVuJ/MuVbo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dave Penkler Subject: [PATCH 6.6 078/113] usb: usbtmc: Fix erroneous generic_read ioctl return Date: Mon, 12 May 2025 19:46:07 +0200 Message-ID: <20250512172030.853882864@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250512172027.691520737@linuxfoundation.org> References: <20250512172027.691520737@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dave Penkler commit 4e77d3ec7c7c0d9535ccf1138827cb9bb5480b9b upstream. wait_event_interruptible_timeout returns a long The return value was being assigned to an int causing an integer overflow when the remaining jiffies > INT_MAX which resulted in random error returns. Use a long return value, converting to the int ioctl return only on error. Fixes: bb99794a4792 ("usb: usbtmc: Add ioctl for vendor specific read") Cc: stable@vger.kernel.org Signed-off-by: Dave Penkler Link: https://lore.kernel.org/r/20250502070941.31819-4-dpenkler@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/usbtmc.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -833,6 +833,7 @@ static ssize_t usbtmc_generic_read(struc unsigned long expire; int bufcount = 1; int again = 0; + long wait_rv; /* mutex already locked */ @@ -945,19 +946,24 @@ static ssize_t usbtmc_generic_read(struc if (!(flags & USBTMC_FLAG_ASYNC)) { dev_dbg(dev, "%s: before wait time %lu\n", __func__, expire); - retval = wait_event_interruptible_timeout( + wait_rv = wait_event_interruptible_timeout( file_data->wait_bulk_in, usbtmc_do_transfer(file_data), expire); - dev_dbg(dev, "%s: wait returned %d\n", - __func__, retval); + dev_dbg(dev, "%s: wait returned %ld\n", + __func__, wait_rv); - if (retval <= 0) { - if (retval == 0) - retval = -ETIMEDOUT; + if (wait_rv < 0) { + retval = wait_rv; goto error; } + + if (wait_rv == 0) { + retval = -ETIMEDOUT; + goto error; + } + } urb = usb_get_from_anchor(&file_data->in_anchor);