diff options
| author | Hangyu Hua <hbh25y@gmail.com> | 2022-04-07 05:40:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-12 13:20:19 +0300 |
| commit | 09af8ccf725c7aee98bcf1fc362bb4ed4588f84d (patch) | |
| tree | 4be94e1b440edf1d6487fa0f96df60e57a14ea22 | |
| parent | 63cee8b63d96f58fadef761fdce0462b47935a61 (diff) | |
| download | linux-09af8ccf725c7aee98bcf1fc362bb4ed4588f84d.tar.xz | |
usb: misc: fix improper handling of refcount in uss720_probe()
commit 0a96fa640dc928da9eaa46a22c46521b037b78ad upstream.
usb_put_dev shouldn't be called when uss720_probe succeeds because of
priv->usbdev. At the same time, priv->usbdev shouldn't be set to NULL
before destroy_priv in uss720_disconnect because usb_put_dev is in
destroy_priv.
Fix this by moving priv->usbdev = NULL after usb_put_dev.
Fixes: dcb4b8ad6a44 ("misc/uss720: fix memory leak in uss720_probe")
Cc: stable <stable@kernel.org>
Reviewed-by: Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220407024001.11761-1-hbh25y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/misc/uss720.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/misc/uss720.c b/drivers/usb/misc/uss720.c index 748139d26263..0be8efcda15d 100644 --- a/drivers/usb/misc/uss720.c +++ b/drivers/usb/misc/uss720.c @@ -71,6 +71,7 @@ static void destroy_priv(struct kref *kref) dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n"); usb_put_dev(priv->usbdev); + priv->usbdev = NULL; kfree(priv); } @@ -736,7 +737,6 @@ static int uss720_probe(struct usb_interface *intf, parport_announce_port(pp); usb_set_intfdata(intf, pp); - usb_put_dev(usbdev); return 0; probe_abort: @@ -754,7 +754,6 @@ static void uss720_disconnect(struct usb_interface *intf) usb_set_intfdata(intf, NULL); if (pp) { priv = pp->private_data; - priv->usbdev = NULL; priv->pp = NULL; dev_dbg(&intf->dev, "parport_remove_port\n"); parport_remove_port(pp); |