From patchwork Sun Jun 20 19:45:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Skripkin X-Patchwork-Id: 12333539 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 13C02C48BDF for ; Sun, 20 Jun 2021 19:45:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE9D661001 for ; Sun, 20 Jun 2021 19:45:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230028AbhFTTrw (ORCPT ); Sun, 20 Jun 2021 15:47:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229872AbhFTTrw (ORCPT ); Sun, 20 Jun 2021 15:47:52 -0400 Received: from mail-lf1-x129.google.com (mail-lf1-x129.google.com [IPv6:2a00:1450:4864:20::129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72446C061574; Sun, 20 Jun 2021 12:45:39 -0700 (PDT) Received: by mail-lf1-x129.google.com with SMTP id d16so18996427lfn.3; Sun, 20 Jun 2021 12:45:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=+W/O6gOP6IW6u1NkP1013U+G2XvQ//6bD4DQBNJYUMU=; b=tUz4xde1JRGigviwrH3tb3lX2Ricb55oLB+6TE6UCbW235XiKNhsH/LZyKtclCGPK3 Dr8hfK5rWAZGzdEjtm7gVKbEEmxYFhxK246MN1CmSFuGaziDINBipKXnX0mdz/0BtI/D dj7IXWX6EI9iODePoDwNQrbH2VZeXo3YIDnigt1am7Ur2XdsvP583KFrznmlxySW3c1U 4ltSEXw9nF6d9SAKM+D/zjUUjUFazCVY/gIgGedbeYm9uJisc1zrgt9Bzf12A3CMoxtP /+1ST49RA4fdtSmWqlYF6M4m/lX6ayYGh+uzSgVVpkrDLXAWtiddDesSmtX9O4iFw+h3 +ipA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=+W/O6gOP6IW6u1NkP1013U+G2XvQ//6bD4DQBNJYUMU=; b=jOUTQ/qN5ikIbwfx35NPBOEFCbRE1omLx9YwyfeLmgybJujFSO2lcqJ8knkx2OSloS wOLrU7SpeWMBsdJQuTRHvutFQxdwUEJBtkKffSeJmoyRrD6fWQ8cMemiJZ8DLbY0dLZF Rz/buepHgiOy1uw2alAsghemLGHNaoR3oOzmzddcTQOrxuWzJBVh/Kckvjpl86mO1Ygu 6fnqSkYjoerGPwNdOs4sTMOAZzZa2c3tiFulK6ZmPgqQ8IMthUztk1VO3JYWHgb6/LYd Ti2Sa/L/d4nor2jAaTwfADLAh7ZgkqcMmQj3ZaEZPSlQ2lS+LSj6VFBxxhr4m1FDbr83 i6zQ== X-Gm-Message-State: AOAM530RIfqKwp5uRTEfgzW3WzQNo4JInFDe2kLHyYPxUvo9FJPLmrqN zZlmTi7q8jDIvJHDyjmYm1Y= X-Google-Smtp-Source: ABdhPJxMf0lULcoAzc5DdX2YIKkaMEj1RP7S5PCazPu7TPz+KtwbMVAtsfmdHip+xoPolH8NnDtbKw== X-Received: by 2002:ac2:46c2:: with SMTP id p2mr2008492lfo.125.1624218337822; Sun, 20 Jun 2021 12:45:37 -0700 (PDT) Received: from localhost.localdomain ([94.103.229.24]) by smtp.gmail.com with ESMTPSA id f8sm1928330ljj.110.2021.06.20.12.45.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Jun 2021 12:45:37 -0700 (PDT) From: Pavel Skripkin To: hverkuil-cisco@xs4all.nl, mchehab@kernel.org, oneukum@suse.com, gregkh@suse.de Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, Pavel Skripkin Subject: [PATCH 1/2] media: go7007: fix memory leak in go7007_usb_probe Date: Sun, 20 Jun 2021 22:45:02 +0300 Message-Id: X-Mailer: git-send-email 2.32.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org In commit 137641287eb4 ("go7007: add sanity checking for endpoints") endpoint sanity check was introduced, but if check fails it simply returns with leaked pointers. Cutted log from my local syzbot instance: BUG: memory leak unreferenced object 0xffff8880209f0000 (size 8192): comm "kworker/0:4", pid 4916, jiffies 4295263583 (age 29.310s) hex dump (first 32 bytes): 30 b0 27 22 80 88 ff ff 75 73 62 2d 64 75 6d 6d 0.'"....usb-dumm 79 5f 68 63 64 2e 33 2d 31 00 00 00 00 00 00 00 y_hcd.3-1....... backtrace: [] kmalloc include/linux/slab.h:556 [inline] [] kzalloc include/linux/slab.h:686 [inline] [] go7007_alloc+0x46/0xb40 drivers/media/usb/go7007/go7007-driver.c:696 [] go7007_usb_probe+0x13e/0x2200 drivers/media/usb/go7007/go7007-usb.c:1114 [] usb_probe_interface+0x314/0x7f0 drivers/usb/core/driver.c:396 [] really_probe+0x291/0xf60 drivers/base/dd.c:576 BUG: memory leak unreferenced object 0xffff88801e2f2800 (size 512): comm "kworker/0:4", pid 4916, jiffies 4295263583 (age 29.310s) hex dump (first 32 bytes): 00 87 40 8a ff ff ff ff 00 00 00 00 00 00 00 00 ..@............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] kmalloc include/linux/slab.h:556 [inline] [] kzalloc include/linux/slab.h:686 [inline] [] go7007_usb_probe+0x184/0x2200 drivers/media/usb/go7007/go7007-usb.c:1118 [] usb_probe_interface+0x314/0x7f0 drivers/usb/core/driver.c:396 [] really_probe+0x291/0xf60 drivers/base/dd.c:576 Fixes: 137641287eb4 ("go7007: add sanity checking for endpoints") Signed-off-by: Pavel Skripkin --- drivers/media/usb/go7007/go7007-usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/usb/go7007/go7007-usb.c b/drivers/media/usb/go7007/go7007-usb.c index dbf0455d5d50..eeb85981e02b 100644 --- a/drivers/media/usb/go7007/go7007-usb.c +++ b/drivers/media/usb/go7007/go7007-usb.c @@ -1134,7 +1134,7 @@ static int go7007_usb_probe(struct usb_interface *intf, ep = usb->usbdev->ep_in[4]; if (!ep) - return -ENODEV; + goto allocfail; /* Allocate the URB and buffer for receiving incoming interrupts */ usb->intr_urb = usb_alloc_urb(0, GFP_KERNEL); From patchwork Sun Jun 20 19:45:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Skripkin X-Patchwork-Id: 12333541 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 466D8C48BDF for ; Sun, 20 Jun 2021 19:47:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25B336113E for ; 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Sun, 20 Jun 2021 12:46:58 -0700 (PDT) From: Pavel Skripkin To: hverkuil-cisco@xs4all.nl, mchehab@kernel.org, oneukum@suse.com, gregkh@suse.de Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, Pavel Skripkin Subject: [PATCH 2/2] media: go7007: remove redundant initialization Date: Sun, 20 Jun 2021 22:45:42 +0300 Message-Id: X-Mailer: git-send-email 2.32.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org In go7007_alloc() kzalloc() is used for struct go7007 allocation. It means that there is no need in zeroing any members, because kzalloc will take care of it. Removing these reduntant initialization steps increases execution speed a lot: Before: + 86.802 us | go7007_alloc(); After: + 29.595 us | go7007_alloc(); Fixes: 866b8695d67e8 ("Staging: add the go7007 video driver") Signed-off-by: Pavel Skripkin --- drivers/media/usb/go7007/go7007-driver.c | 26 ------------------------ 1 file changed, 26 deletions(-) diff --git a/drivers/media/usb/go7007/go7007-driver.c b/drivers/media/usb/go7007/go7007-driver.c index f1767be9d868..6650eab913d8 100644 --- a/drivers/media/usb/go7007/go7007-driver.c +++ b/drivers/media/usb/go7007/go7007-driver.c @@ -691,49 +691,23 @@ struct go7007 *go7007_alloc(const struct go7007_board_info *board, struct device *dev) { struct go7007 *go; - int i; go = kzalloc(sizeof(struct go7007), GFP_KERNEL); if (go == NULL) return NULL; go->dev = dev; go->board_info = board; - go->board_id = 0; go->tuner_type = -1; - go->channel_number = 0; - go->name[0] = 0; mutex_init(&go->hw_lock); init_waitqueue_head(&go->frame_waitq); spin_lock_init(&go->spinlock); go->status = STATUS_INIT; - memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter)); - go->i2c_adapter_online = 0; - go->interrupt_available = 0; init_waitqueue_head(&go->interrupt_waitq); - go->input = 0; go7007_update_board(go); - go->encoder_h_halve = 0; - go->encoder_v_halve = 0; - go->encoder_subsample = 0; go->format = V4L2_PIX_FMT_MJPEG; go->bitrate = 1500000; go->fps_scale = 1; - go->pali = 0; go->aspect_ratio = GO7007_RATIO_1_1; - go->gop_size = 0; - go->ipb = 0; - go->closed_gop = 0; - go->repeat_seqhead = 0; - go->seq_header_enable = 0; - go->gop_header_enable = 0; - go->dvd_mode = 0; - go->interlace_coding = 0; - for (i = 0; i < 4; ++i) - go->modet[i].enable = 0; - for (i = 0; i < 1624; ++i) - go->modet_map[i] = 0; - go->audio_deliver = NULL; - go->audio_enabled = 0; return go; }