From: Abdun Nihaal <abdun.nihaal@gmail.com> stable inclusion from stable-v6.6.88 commit 7ca513631fa6ad3011b8b9197cdde0f351103704 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IC5BMW CVE: CVE-2025-37796 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ 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> Signed-off-by: Dong Chenchen <dongchenchen2@huawei.com> --- drivers/net/wireless/atmel/at76c50x-usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/atmel/at76c50x-usb.c b/drivers/net/wireless/atmel/at76c50x-usb.c index 447b51cff8f9..c1a92c7f0f8e 100644 --- a/drivers/net/wireless/atmel/at76c50x-usb.c +++ b/drivers/net/wireless/atmel/at76c50x-usb.c @@ -2554,7 +2554,7 @@ 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"); } -- 2.25.1