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 96F0233F385; Fri, 27 Mar 2026 10:52:20 +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=1774608740; cv=none; b=gQ88tW1i/LRCnwi49CIsG1HuQd5+JndJZX3fTqX87pPp5JHujq1+OAgL+D3FC3BMdsUOsq1DiDInxYWRqPLNcTdGPakJCVQiFntb2EUnbl6z4Qz8vYB2Htd2dIV32kvns5WOdCztHHMuZkUYkeRve7mEPR7YuYutQWc87Bbe9sU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774608740; c=relaxed/simple; bh=PIjhqXV96eZdpEdqYKATLZ86ccJJiq7XCV261VUyjdg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GFNG8v281TZSwtP07ScUvqIXyQMNtf7VuPd4aF1fzFkPs83NSmLJ0JWm+hVZELLDm8VBmsnvE4Lds4Q3uih/59qM8i/1sTkssNi4jahM5re0XQgaxvhYiIY9G/BCBdGJSRvkFTLNxiOSXww1pymnCNkxOsdvar2dYrow4lf+rlM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HSoU9hMt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HSoU9hMt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FE41C2BC86; Fri, 27 Mar 2026 10:52:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774608740; bh=PIjhqXV96eZdpEdqYKATLZ86ccJJiq7XCV261VUyjdg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HSoU9hMtl1mpvyS+eR6AvXOwZ/ntnp6B3E7TT74fiScs0MJHSKFQC8EmBkr6pWYDZ dHnED8ne9UwQeZVPu7TyMbzhkrHT20UxQBaTyY61YHE2DBSHOQzs7BlbeHr4LRXcbD codAwSjme9EYZ5DYnVUBGTO4rf3rul3Nzfnz0ilr8++pr6JiicfRk37eiyim+I7m+d XfG8FftrC8brcEoLelHr1jsJTwwc/BsQY72T15AYkA5awIFzS8SZS36/Z2V+WCzxjg k0oBRzmytmBC2kt/bIk+lkc/yqwLwWSDpU6VYL21Bf4h6JDVxfmkXu+Qn598qTEwlJ 5N9NB013H/gXQ== Received: from johan by xi.lan with local (Exim 4.98.2) (envelope-from ) id 1w64na-00000005UzU-14MI; Fri, 27 Mar 2026 11:52:18 +0100 From: Johan Hovold To: Ulf Hansson Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , stable@vger.kernel.org, Tony Olech Subject: [PATCH 1/4] mmc: vub300: fix NULL-deref on disconnect Date: Fri, 27 Mar 2026 11:52:05 +0100 Message-ID: <20260327105208.1310739-2-johan@kernel.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260327105208.1310739-1-johan@kernel.org> References: <20260327105208.1310739-1-johan@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 Cc: Tony Olech Signed-off-by: Johan Hovold --- drivers/mmc/host/vub300.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/vub300.c b/drivers/mmc/host/vub300.c index ff49d0770506..f173c7cf4e1a 100644 --- a/drivers/mmc/host/vub300.c +++ b/drivers/mmc/host/vub300.c @@ -2365,8 +2365,8 @@ static void vub300_disconnect(struct usb_interface *interface) 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; -- 2.52.0