diff options
| author | Abdun Nihaal <abdun.nihaal@gmail.com> | 2025-03-30 16:01:10 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-25 10:47:37 +0200 |
| commit | a9682bfef2cf3802515a902e964d774e137be1b9 (patch) | |
| tree | 031f568e1ae48ca02a840f92191b5b769c2f8227 | |
| parent | 1773fbf7c05b5cc7816506bff753ca895039f8c5 (diff) | |
wifi: at76c50x: fix use after free access in at76_disconnect
[ Upstream commit 27c7e63b3cb1a20bb78ed4a36c561ea4579fd7da ]
The memory pointed to by priv is freed at the end of at76_delete_device
function (using ieee80211_free_hw). But the code then accesses the udev
field of the freed object to put the USB device. This may also lead to a
memory leak of the usb device. Fix this by using udev from interface.
Fixes: 29e20aa6c6af ("at76c50x-usb: fix use after free on failure path in at76_probe()")
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
Link: https://patch.msgid.link/20250330103110.44080-1-abdun.nihaal@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/wireless/atmel/at76c50x-usb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/atmel/at76c50x-usb.c b/drivers/net/wireless/atmel/at76c50x-usb.c index 504e05ea30f2..97ea7ab0f491 100644 --- a/drivers/net/wireless/atmel/at76c50x-usb.c +++ b/drivers/net/wireless/atmel/at76c50x-usb.c @@ -2552,7 +2552,7 @@ static void at76_disconnect(struct usb_interface *interface) wiphy_info(priv->hw->wiphy, "disconnecting\n"); at76_delete_device(priv); - usb_put_dev(priv->udev); + usb_put_dev(interface_to_usbdev(interface)); dev_info(&interface->dev, "disconnected\n"); } |