This is a note to let you know that I've just added the patch titled
USB: sierra: fix urb and memory leak in resume error path
to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-next branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will also be merged in the next major kernel release
during the merge window.
If you have any questions about this process, please let me know.
>From 7fdd26a01eb7b6cb6855ff8f69ef4a720720dfcb Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@xxxxxxxxx>
Date: Mon, 26 May 2014 19:22:52 +0200
Subject: USB: sierra: fix urb and memory leak in resume error path
Neither the transfer buffer or the urb itself were released in the
resume error path for delayed writes. Also on errors, the remainder of
the queue was not even processed, which leads to further urb and buffer
leaks.
The same error path also failed to balance the outstanding-urb counter,
something which results in degraded throughput or completely blocked
writes.
Fix this by releasing urb and buffer and balancing counters on errors,
and by always processing the whole queue even when submission of one urb
fails.
Fixes: e6929a9020ac ("USB: support for autosuspend in sierra while
online")
Cc: <stable@xxxxxxxxxxxxxxx> # v2.6.32
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/sierra.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 2c5c5a9330e2..dd9820d3fa03 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -1004,8 +1004,12 @@ static int sierra_resume(struct usb_serial *serial)
if (err < 0) {
intfdata->in_flight--;
usb_unanchor_urb(urb);
- usb_scuttle_anchored_urbs(&portdata->delayed);
- break;
+ kfree(urb->transfer_buffer);
+ usb_free_urb(urb);
+ spin_lock(&portdata->lock);
+ portdata->outstanding_urbs--;
+ spin_unlock(&portdata->lock);
+ continue;
}
}
--
1.9.0
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html