This is a note to let you know that I've just added the patch titled
USB: serial: garmin_gps: fix I/O after failed probe and remove
to the 4.4-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-garmin_gps-fix-i-o-after-failed-probe-and-remove.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 19a565d9af6e0d828bd0d521d3bafd5017f4ce52 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Wed, 11 Oct 2017 14:02:57 +0200
Subject: USB: serial: garmin_gps: fix I/O after failed probe and remove
From: Johan Hovold <johan@xxxxxxxxxx>
commit 19a565d9af6e0d828bd0d521d3bafd5017f4ce52 upstream.
Make sure to stop any submitted interrupt and bulk-out URBs before
returning after failed probe and when the port is being unbound to avoid
later NULL-pointer dereferences in the completion callbacks.
Also fix up the related and broken I/O cancellation on failed open and
on close. (Note that port->write_urb was never submitted.)
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/garmin_gps.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -138,6 +138,7 @@ struct garmin_data {
__u8 privpkt[4*6];
spinlock_t lock;
struct list_head pktlist;
+ struct usb_anchor write_urbs;
};
@@ -906,7 +907,7 @@ static int garmin_init_session(struct us
sizeof(GARMIN_START_SESSION_REQ), 0);
if (status < 0)
- break;
+ goto err_kill_urbs;
}
if (status > 0)
@@ -914,6 +915,12 @@ static int garmin_init_session(struct us
}
return status;
+
+err_kill_urbs:
+ usb_kill_anchored_urbs(&garmin_data_p->write_urbs);
+ usb_kill_urb(port->interrupt_in_urb);
+
+ return status;
}
@@ -931,7 +938,6 @@ static int garmin_open(struct tty_struct
spin_unlock_irqrestore(&garmin_data_p->lock, flags);
/* shutdown any bulk reads that might be going on */
- usb_kill_urb(port->write_urb);
usb_kill_urb(port->read_urb);
if (garmin_data_p->state == STATE_RESET)
@@ -954,7 +960,7 @@ static void garmin_close(struct usb_seri
/* shutdown our urbs */
usb_kill_urb(port->read_urb);
- usb_kill_urb(port->write_urb);
+ usb_kill_anchored_urbs(&garmin_data_p->write_urbs);
/* keep reset state so we know that we must start a new session */
if (garmin_data_p->state != STATE_RESET)
@@ -1038,12 +1044,14 @@ static int garmin_write_bulk(struct usb_
}
/* send it down the pipe */
+ usb_anchor_urb(urb, &garmin_data_p->write_urbs);
status = usb_submit_urb(urb, GFP_ATOMIC);
if (status) {
dev_err(&port->dev,
"%s - usb_submit_urb(write bulk) failed with status = %d\n",
__func__, status);
count = status;
+ usb_unanchor_urb(urb);
kfree(buffer);
}
@@ -1402,6 +1410,7 @@ static int garmin_port_probe(struct usb_
garmin_data_p->state = 0;
garmin_data_p->flags = 0;
garmin_data_p->count = 0;
+ init_usb_anchor(&garmin_data_p->write_urbs);
usb_set_serial_port_data(port, garmin_data_p);
status = garmin_init_session(port);
@@ -1414,6 +1423,7 @@ static int garmin_port_remove(struct usb
{
struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
+ usb_kill_anchored_urbs(&garmin_data_p->write_urbs);
usb_kill_urb(port->interrupt_in_urb);
del_timer_sync(&garmin_data_p->timer);
kfree(garmin_data_p);
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.4/usb-serial-qcserial-add-pid-vid-for-sierra-wireless-em7355-fw-update.patch
queue-4.4/usb-serial-garmin_gps-fix-i-o-after-failed-probe-and-remove.patch
queue-4.4/usb-serial-garmin_gps-fix-memory-leak-on-probe-errors.patch