From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2A03B28C5AB; Wed, 23 Apr 2025 15:24:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745421895; cv=none; b=BcOJfnOwy0vD8woMjml7tZqhl/Jeu3bbmhA9XVIRJwnW5WU9LX5cSCc1z1INhpKh62+HtPcrzPoF9S2vqG4NnR/pLonCVGwjOJZcvDmwpn1YQQgAmUWu6ipTSgo2ZeTCOehgyj30gk7lXqVbyENWt+mkCe8tCGumDE+2Z41CxBI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745421895; c=relaxed/simple; bh=jj4LtM9lvuUYwCEmzLmESCq7yf9H42KMsnVONV4qNTc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=R7bebiia/+cNXI7WyHNlfNAvzpG4oDfMNfE40ZoMfHcuovR9VSUIQVycup6LHigXt98KahxwM5k2V7M0mO2wHiscYoyJ/2OOtgAFtlOwt5Mlp5yM3/KaH8SRivRoW7/ELF44nuwkLvd1HmahQk9n7QNOJPC+Umj9GIZA8lwCbgo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=V87e8/rP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="V87e8/rP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51EB5C4CEE2; Wed, 23 Apr 2025 15:24:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745421894; bh=jj4LtM9lvuUYwCEmzLmESCq7yf9H42KMsnVONV4qNTc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V87e8/rPQV9xTPrfuKhKJVtMs/QCE+6Kyc0kXzpnlVuu6FyG2rEOuK/qTaNCAI6hq f586gYmo9aGsQopv/h130zR1yb2IyCfbwTnAGMulGsvg5Y7vwP50KELX7xytLukZJT dN6CdxBW7Dmx2rfl4LYN198yUMkjybizU/pD3Uew= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Abdun Nihaal , Johannes Berg , Sasha Levin Subject: [PATCH 6.6 241/393] wifi: at76c50x: fix use after free access in at76_disconnect Date: Wed, 23 Apr 2025 16:42:17 +0200 Message-ID: <20250423142653.340437892@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250423142643.246005366@linuxfoundation.org> References: <20250423142643.246005366@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Abdun Nihaal [ 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 Link: https://patch.msgid.link/20250330103110.44080-1-abdun.nihaal@gmail.com Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- 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 447b51cff8f96..c1a92c7f0f8e8 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"); } -- 2.39.5