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 7F7C6C433EF for ; Wed, 25 May 2022 08:27:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233492AbiEYI1o (ORCPT ); Wed, 25 May 2022 04:27:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229649AbiEYI1k (ORCPT ); Wed, 25 May 2022 04:27:40 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 013ED20BDD; Wed, 25 May 2022 01:27:37 -0700 (PDT) X-UUID: 96467fc6f1d24a0da4c5d013fd2bf27e-20220525 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5,REQID:ee338470-198f-485b-81e6-c01d91845684,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACT ION:release,TS:-5 X-CID-META: VersionHash:2a19b09,CLOUDID:91236847-4fb1-496b-8f1d-39e733fed1ea,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil ,QS:0,BEC:nil X-UUID: 96467fc6f1d24a0da4c5d013fd2bf27e-20220525 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 741277775; Wed, 25 May 2022 16:27:34 +0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Wed, 25 May 2022 16:27:33 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 25 May 2022 16:27:33 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 25 May 2022 16:27:33 +0800 From: Mark-PK Tsai To: CC: , , , , , , , , , Subject: [PATCH 5.4 0/2] media: vim2m: Fix potential NULL pointer dereference Date: Wed, 25 May 2022 16:27:29 +0800 Message-ID: <20220525082731.28235-1-mark-pk.tsai@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Backport upstream solution [1][2] to fix below kernel panic: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000208 ... pc : _raw_spin_lock_irqsave+0x50/0x90 lr : v4l2_m2m_cancel_job+0x38/0x1c4 [v4l2_mem2mem] sp : ffffffc012d2bcb0 x29: ffffffc012d2bcb0 x28: ffffff8098d6bb00 x27: 0000000000000000 x26: ffffffc01009b5c8 x25: 00000000000e001f x24: ffffff808ff3eb50 x23: ffffffc01009f5a0 x22: 0000000000000000 x21: ffffff808ffef000 x20: 0000000000000208 x19: 0000000000000000 x18: ffffffc012b51048 x17: ffffffc011e0ef7c x16: 00000000000000c0 x15: ffffffc010fc78f4 x14: ffffffc0119dd790 x13: 0000000000001b26 x12: 0000000053555555 x11: 0000000000000002 x10: 0000000000000001 x9 : 0000000000000000 x8 : 0000000000000208 x7 : 2020202020202020 x6 : ffffffc011e313a6 x5 : 0000000000000000 x4 : 0000000000000008 x3 : 000000000000002e x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000208 Call trace: _raw_spin_lock_irqsave+0x50/0x90 v4l2_m2m_cancel_job+0x38/0x1c4 [v4l2_mem2mem] v4l2_m2m_ctx_release+0x38/0x60 [v4l2_mem2mem] vim2m_release+0x5c/0xe0 [vim2m] v4l2_release+0x90/0x18c __fput+0xdc/0x2cc ____fput+0x10/0x1c task_work_run+0xc4/0x130 do_notify_resume+0xdc/0x158 work_pending+0x8/0x10 [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cf7f34777a5b4100a3a44ff95f3d949c62892bdd [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1a28dce222a6ece725689ad58c0cf4a1b48894f4 Mark-PK Tsai (2): media: vim2m: Register video device after setting up internals media: vim2m: initialize the media device earlier drivers/media/platform/vim2m.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) -- 2.18.0