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 378451B424F; Sun, 7 Sep 2025 20:14:42 +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=1757276082; cv=none; b=OcofKYHjeMg0D4aFakfORkRMpdxxjL66xIiafpNdUUhEIq9bvNtULeb2rZmlWtNTdDq5bGOETaEem7nvpKHOKw0mExQQ+0/mNm9Nbui7uIkjkWOLrJrPfWN5pAs5AxTZwFFe1UMS9m5UEZ4ekqXUVxIPeFRaMKRRcyfjIffyTCw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757276082; c=relaxed/simple; bh=Io8lqluQ2ApYeAKJZyutMZ/jwxSCM9S4VfzCTVQgR6k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Fp6W0vJPUe8Stj8Pe3gQJ/BHA9U++UHLGtTulscOjtCci2vMXayfCNbX9AJBkIRmCsJoWfI79uTNlafzwktxaKD2BSzWWbyH8VSvXjUunKqmtMikcKPQNB+SEXWvGu/eHIY71uEQLxVjc7ICBtDINMs/0SpZMjkLxJ3uFNWnvG8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=B7i8lhVn; 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="B7i8lhVn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ACDABC4CEF8; Sun, 7 Sep 2025 20:14:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1757276082; bh=Io8lqluQ2ApYeAKJZyutMZ/jwxSCM9S4VfzCTVQgR6k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=B7i8lhVnVWEnI6qwvoDOyhjtfNF4tgSDclLtsP4z0r4yLXZ51IetIlLjV/5IxpjDP EuQ0A3c+ciZVvYS+jVgem8jncNPIIvRZX9Aj8dR95sf6VXWiLeCc85Gm0XZPT2gJLA bmbgyXlZOJS6ylAKVKeoLNevDHFFA9R+aOlbV0Hg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ma Ke , Dominik Brodowski Subject: [PATCH 5.15 30/64] pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region() Date: Sun, 7 Sep 2025 21:58:12 +0200 Message-ID: <20250907195604.224739939@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250907195603.394640159@linuxfoundation.org> References: <20250907195603.394640159@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ma Ke commit 44822df89e8f3386871d9cad563ece8e2fd8f0e7 upstream. In __iodyn_find_io_region(), pcmcia_make_resource() is assigned to res and used in pci_bus_alloc_resource(). There is a dereference of res in pci_bus_alloc_resource(), which could lead to a NULL pointer dereference on failure of pcmcia_make_resource(). Fix this bug by adding a check of res. Cc: stable@vger.kernel.org Fixes: 49b1153adfe1 ("pcmcia: move all pcmcia_resource_ops providers into one module") Signed-off-by: Ma Ke Signed-off-by: Dominik Brodowski Signed-off-by: Greg Kroah-Hartman --- drivers/pcmcia/rsrc_iodyn.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/pcmcia/rsrc_iodyn.c +++ b/drivers/pcmcia/rsrc_iodyn.c @@ -62,6 +62,9 @@ static struct resource *__iodyn_find_io_ unsigned long min = base; int ret; + if (!res) + return NULL; + data.mask = align - 1; data.offset = base & data.mask;