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 6BEF624DCF6; Mon, 13 Apr 2026 16:18:23 +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=1776097103; cv=none; b=RIPR/yWLt8PKN25nPzOAzObyoImOeOHnfP7spRkzsBI9maei1FCQukppE1Reh0qkT2PK5Ket7MMnGj8TQ3sy333eK59RXIXjOGz9WpjvcGq/EZi79uaOnCHhuzBh8MrQ03vePsGCO96ZiftSnAAWuKyhFltx+N0Iv7FRZaeMSxM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097103; c=relaxed/simple; bh=OE7ZN7pU+YxSBJ12DM3t8nsLC5egA954stA+PhCqgT4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rzfprH6h5/4mCnS/5bxtAfYeEpQnMZ4+P525HpjPzzYmWtlYz04P9BR9PMvmgRGkR+c3bFi+KT5bH5kCgUrgaS5NXYOUH8WzD7i8o/1CT8oUj7EdTBVRYOQrW7jHGmfiQ38ivdnDyPgK/PuIU1qlrePVQH30smbBTyN1LeDQ3yE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=RvkX5iVu; 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="RvkX5iVu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03551C2BCAF; Mon, 13 Apr 2026 16:18:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776097103; bh=OE7ZN7pU+YxSBJ12DM3t8nsLC5egA954stA+PhCqgT4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RvkX5iVuBZOPJCc7Q3Oxnnlgij7d+lSLjhWfZ+dzadm73/e1qXMWeET0OG42AXsSP VWKYJl4Z9op6RgGYPuq/VX1sYSJsraDtA0Y2UKdm9R3Tv6mWpYJDebXpZYHgdjtfbJ 3dy8mJcy6a5HT3CmCkS0l95NDXOWOOR/h6jWWXMI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold , Ulf Hansson Subject: [PATCH 6.1 50/55] mmc: vub300: fix NULL-deref on disconnect Date: Mon, 13 Apr 2026 18:01:24 +0200 Message-ID: <20260413155726.699181216@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155724.820472494@linuxfoundation.org> References: <20260413155724.820472494@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-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 @@ -2371,8 +2371,8 @@ 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;