From patchwork Wed May 12 14:46:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 436680 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB4A4C2B9FE for ; Wed, 12 May 2021 16:18:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9F70D61D73 for ; Wed, 12 May 2021 16:18:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238745AbhELQPP (ORCPT ); Wed, 12 May 2021 12:15:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:38984 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231558AbhELQIN (ORCPT ); Wed, 12 May 2021 12:08:13 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BE73761D29; Wed, 12 May 2021 15:38:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620833940; bh=xz92FOpheA9ZOF9VnEJ0f1K84zDSsAqk20jhK4woGiU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hWAIvwQRIiGB3GJTyj3d8ukrttcZAKgJiDBR1Pjchdz4z9Uq4BVGXj3g7eP+nW2Yt X82Rsr0GuFfK8S02Er4pEhJ1uA+i9UMu6QOeLcq7KxkJRKg+uuLn7LhKQAkvxM0RUH zkIRUVH6skLIzPlBcd8c7k2Z9LTw9H0EURvC5s98= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.11 330/601] media: atomisp: Fix use after free in atomisp_alloc_css_stat_bufs() Date: Wed, 12 May 2021 16:46:47 +0200 Message-Id: <20210512144838.668259434@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144827.811958675@linuxfoundation.org> References: <20210512144827.811958675@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dan Carpenter [ Upstream commit ba11bbf303fafb33989e95473e409f6ab412b18d ] The "s3a_buf" is freed along with all the other items on the "asd->s3a_stats" list. It leads to a double free and a use after free. Link: https://lore.kernel.org/linux-media/X9dSO3RGf7r0pq2k@mwanda Fixes: ad85094b293e ("Revert "media: staging: atomisp: Remove driver"") Signed-off-by: Dan Carpenter Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/staging/media/atomisp/pci/atomisp_ioctl.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c index 2ae50decfc8b..9da82855552d 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c +++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c @@ -948,10 +948,8 @@ int atomisp_alloc_css_stat_bufs(struct atomisp_sub_device *asd, dev_dbg(isp->dev, "allocating %d dis buffers\n", count); while (count--) { dis_buf = kzalloc(sizeof(struct atomisp_dis_buf), GFP_KERNEL); - if (!dis_buf) { - kfree(s3a_buf); + if (!dis_buf) goto error; - } if (atomisp_css_allocate_stat_buffers( asd, stream_id, NULL, dis_buf, NULL)) { kfree(dis_buf);