This is a note to let you know that I've just added the patch titled
USB: serial: digi_acceleport: fix OOB data sanity check
to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-serial-digi_acceleport-fix-oob-data-sanity-check.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2d380889215fe20b8523345649dee0579821800c Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Tue, 31 Jan 2017 17:17:27 +0100
Subject: USB: serial: digi_acceleport: fix OOB data sanity check
From: Johan Hovold <johan@xxxxxxxxxx>
commit 2d380889215fe20b8523345649dee0579821800c upstream.
Make sure to check for short transfers to avoid underflow in a loop
condition when parsing the receive buffer.
Also fix an off-by-one error in the incomplete sanity check which could
lead to invalid data being parsed.
Fixes: 8c209e6782ca ("USB: make actual_length in struct urb field u32")
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/digi_acceleport.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -1482,16 +1482,20 @@ static int digi_read_oob_callback(struct
struct usb_serial *serial = port->serial;
struct tty_struct *tty;
struct digi_port *priv = usb_get_serial_port_data(port);
+ unsigned char *buf = urb->transfer_buffer;
int opcode, line, status, val;
int i;
unsigned int rts;
+ if (urb->actual_length < 4)
+ return -1;
+
/* handle each oob command */
- for (i = 0; i < urb->actual_length - 3;) {
- opcode = ((unsigned char *)urb->transfer_buffer)[i++];
- line = ((unsigned char *)urb->transfer_buffer)[i++];
- status = ((unsigned char *)urb->transfer_buffer)[i++];
- val = ((unsigned char *)urb->transfer_buffer)[i++];
+ for (i = 0; i < urb->actual_length - 4; i += 4) {
+ opcode = buf[i];
+ line = buf[i + 1];
+ status = buf[i + 2];
+ val = buf[i + 3];
dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n",
opcode, line, status, val);
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.10/usb-serial-ftdi_sio-fix-modem-status-error-handling.patch
queue-4.10/usb-serial-cp210x-add-new-ids-for-ge-bx50v3-boards.patch
queue-4.10/usb-serial-ark3116-fix-register-accessor-error-handling.patch
queue-4.10/usb-serial-digi_acceleport-fix-oob-data-sanity-check.patch
queue-4.10/usb-serial-ftdi_sio-fix-line-status-over-reporting.patch
queue-4.10/usb-serial-ftdi_sio-fix-extreme-low-latency-setting.patch
queue-4.10/usb-serial-spcp8x5-fix-modem-status-handling.patch
queue-4.10/usb-serial-opticon-fix-cts-retrieval-at-open.patch
queue-4.10/usb-serial-mos7840-fix-another-null-deref-at-open.patch
queue-4.10/usb-serial-console-fix-uninitialised-spinlock.patch