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 EDAB324DCF6; Mon, 13 Apr 2026 16:15:54 +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=1776096955; cv=none; b=T3HF8CO67286fMzJ0C8xf1PhIpOlY0ir39IJADa6AoeAtpbF3Zzfulxb3WrYiafk3/sibgRBS/AMhSmAlJ+Sel67X+FLDR5b1VcUAlNu9J/TJs9m1b0xOjB2TpchkRQ1WVoxE6sGjn6P0BXkMmEzeqEFNEzVZGI0K0LWUq5Zi9s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776096955; c=relaxed/simple; bh=cZ01T/+YAYgyhxYjp7uWYhQ3vXvQ0MK0Xd15oyOSL+w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=avNLPFusLY1B3AZJPlV6vvtP16M0ZXlT61GdGkD45YO0MpEX1NN6aGLtE5MHL1CE5HDPKJUkehhqley0a/zsgXGQ1cFlHhsQ0rv7Px271GmaDbxbiMrFlC4vcVU1Guek+Qfy8YXOk3G69s3MUcwM+V/8GW5zlqxfUEyHvUct+tA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=TPpY+9WF; 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="TPpY+9WF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4939DC2BCAF; Mon, 13 Apr 2026 16:15:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776096954; bh=cZ01T/+YAYgyhxYjp7uWYhQ3vXvQ0MK0Xd15oyOSL+w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TPpY+9WF3NreLS15f741JwKcNeouuKJkev5IVPsXXZS7QamTJSNBmgLbrTzAaNdXC qWNXY0aPbtbSRLt1KIDqy6+2aaDePfWKsObz5Ix6ksveILZ3t6TKIOqEnSuyhfzqks zH8GeJCKGD54mZONy0znmezhcCODITDjAfEQV+/0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold , Ulf Hansson Subject: [PATCH 6.6 38/50] mmc: vub300: fix NULL-deref on disconnect Date: Mon, 13 Apr 2026 18:01:05 +0200 Message-ID: <20260413155725.935894588@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155724.497323914@linuxfoundation.org> References: <20260413155724.497323914@linuxfoundation.org> User-Agent: quilt/0.69 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: Johan Hovold commit dff34ef879c5e73298443956a8b391311ba78d57 upstream. Make sure to deregister the controller before dropping the reference to the driver data on disconnect to avoid NULL-pointer dereferences or use-after-free. Fixes: 88095e7b473a ("mmc: Add new VUB300 USB-to-SD/SDIO/MMC driver") Cc: stable@vger.kernel.org # 3.0+ Signed-off-by: Johan Hovold Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/vub300.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/mmc/host/vub300.c +++ b/drivers/mmc/host/vub300.c @@ -2369,8 +2369,8 @@ static void vub300_disconnect(struct usb usb_set_intfdata(interface, NULL); /* prevent more I/O from starting */ vub300->interface = NULL; - kref_put(&vub300->kref, vub300_delete); mmc_remove_host(mmc); + kref_put(&vub300->kref, vub300_delete); pr_info("USB vub300 remote SDIO host controller[%d]" " now disconnected", ifnum); return;