From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0BB1BC4332F for ; Wed, 4 Jan 2023 16:15:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239909AbjADQPy (ORCPT ); Wed, 4 Jan 2023 11:15:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37986 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239897AbjADQPh (ORCPT ); Wed, 4 Jan 2023 11:15:37 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA92442E11 for ; Wed, 4 Jan 2023 08:15:10 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 9EEA8B8171C for ; Wed, 4 Jan 2023 16:15:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E3195C433EF; Wed, 4 Jan 2023 16:15:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672848908; bh=MimaLMWi5ZRbnPPy0T/5UcHq4lgxAWRPmd8ZHeCPtAY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DPEyEPGBy0bKJyPD3WpmkjFL1Diu+849jhS94s0RimXCQcBHhouX8k/p1JGzcGPtM PVt8ALH0izH2Krqt1GP7W9cBjR4RG/ykb5q2GYWTX9AO33yI2KvY5vCr8deCaFHsgE Rtk0IWIvTfsJn1Nn0uIaGUFIXhNy+xtUS/MIOsl0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, linux-fsd@tesla.com, Smitha T Murthy , Hans Verkuil Subject: [PATCH 6.0 033/177] media: s5p-mfc: Clear workbit to handle error condition Date: Wed, 4 Jan 2023 17:05:24 +0100 Message-Id: <20230104160508.669049097@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230104160507.635888536@linuxfoundation.org> References: <20230104160507.635888536@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Smitha T Murthy commit d3f3c2fe54e30b0636496d842ffbb5ad3a547f9b upstream. During error on CLOSE_INSTANCE command, ctx_work_bits was not getting cleared. During consequent mfc execution NULL pointer dereferencing of this context led to kernel panic. This patch fixes this issue by making sure to clear ctx_work_bits always. Fixes: 818cd91ab8c6 ("[media] s5p-mfc: Extract open/close MFC instance commands") Cc: stable@vger.kernel.org Cc: linux-fsd@tesla.com Signed-off-by: Smitha T Murthy Signed-off-by: Hans Verkuil Signed-off-by: Greg Kroah-Hartman --- drivers/media/platform/samsung/s5p-mfc/s5p_mfc_ctrl.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_ctrl.c +++ b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_ctrl.c @@ -468,8 +468,10 @@ void s5p_mfc_close_mfc_inst(struct s5p_m s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); /* Wait until instance is returned or timeout occurred */ if (s5p_mfc_wait_for_done_ctx(ctx, - S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET, 0)) + S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET, 0)){ + clear_work_bit_irqsave(ctx); mfc_err("Err returning instance\n"); + } /* Free resources */ s5p_mfc_hw_call(dev->mfc_ops, release_codec_buffers, ctx);