From patchwork Fri May 14 12:34:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongliang Mu X-Patchwork-Id: 439703 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 E4083C433ED for ; Fri, 14 May 2021 12:34:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0DD161460 for ; Fri, 14 May 2021 12:34:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233576AbhENMf7 (ORCPT ); Fri, 14 May 2021 08:35:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232968AbhENMf6 (ORCPT ); Fri, 14 May 2021 08:35:58 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9628BC061574; Fri, 14 May 2021 05:34:47 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id v11-20020a17090a6b0bb029015cba7c6bdeso1559409pjj.0; Fri, 14 May 2021 05:34:47 -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:mime-version :content-transfer-encoding; bh=ErfaclmgSuY2taH4Itt0ooytROATSvud8f5aTV69WAo=; b=bQpuUyoXJmCT/ZpqkIKVIrWwNWw141T+6IdbtfRNKRe0MgFf1EOsATSf4F2pHTHI/D Rqa8NUBOjhX5eAQ35KJuZRBqAcoV+8V9ZYA8k1RToFABGz9kqq0WXR742CdHSVBuvTtU fTooGdHoNlmzyB1uTV5KQWMsNIJNy/07Td/K+Ybb2TsujaWlg9A4AzfYVuS7dFc6whc5 j6xqp9DIVLhBkjsiNAbsAoEVfHv9uvnoBE29Plcqux1vh8M4kFPG6+p00iRu+KK3XioB iSD8OHZPJOrOMYvnEGR1pr/JpTv/V5ZyNM/l99Tg70vcirUbYT79WcIZ5sIOBam9+y5H xs4A== 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:mime-version :content-transfer-encoding; bh=ErfaclmgSuY2taH4Itt0ooytROATSvud8f5aTV69WAo=; b=kjNscKqFAA+XuCPxj6kRI/S2W+BOrFsY2Rq163J6kP40B3UYZEC6BTnh4DrBdsOOMj quBbaO/HMeft1QEaF75brU2xzRBm2Pf0eoK87cGg2NNzaiEebEGgkzVvDgrGYWZ3p94p MrIHXoY2aRjjhZ9LBhks7+eeChJ5mg+75yhuSZBExZd5C5gL3WYryj/eG+lP4I5vP4aW 5QntjAbGdlFOrEZQ+bymLc900hzygLnr0Ow8Ms86r12thiYSKGj02kZhAlJX3YzSSndf Dz2DySskjG4XD1gl6KhlGeReIWMHYwIGF1S+bv0JKd5aHxwohGs7Gc6T2QUgCIK7Sv6k tt5A== X-Gm-Message-State: AOAM533KPXgKIHPl3Je0zWwyoanx66gd7bW9L0IITO2+M7jJA0sHie7E 400z4kKG9rLvvt1hkd4FaDQwK2avyjxfK5Gzfg4teg== X-Google-Smtp-Source: ABdhPJyqqn+qBYLXGh+Gk9tSU5NT2C+mk4vCK0k7r7g7Pyp2gdvaAHueG38jfDUK6CL/bEoG9o6DUA== X-Received: by 2002:a17:902:a5ca:b029:ef:ac0a:f00f with SMTP id t10-20020a170902a5cab02900efac0af00fmr4995222plq.22.1620995687121; Fri, 14 May 2021 05:34:47 -0700 (PDT) Received: from localhost.localdomain ([45.135.186.114]) by smtp.gmail.com with ESMTPSA id g8sm4071337pfo.85.2021.05.14.05.34.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 May 2021 05:34:46 -0700 (PDT) From: Dongliang Mu To: gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Dongliang Mu , syzbot+636c58f40a86b4a879e7@syzkaller.appspotmail.com Subject: [PATCH v2] misc/uss720: fix memory leak in uss720_probe Date: Fri, 14 May 2021 20:34:25 +0800 Message-Id: <20210514123425.6345-1-mudongliangabcd@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org uss720_probe forgets to decrease the refcount of usbdev in uss720_probe. Fix this by decreasing the refcount of usbdev by usb_put_dev. BUG: memory leak unreferenced object 0xffff888101113800 (size 2048): comm "kworker/0:1", pid 7, jiffies 4294956777 (age 28.870s) hex dump (first 32 bytes): ff ff ff ff 31 00 00 00 00 00 00 00 00 00 00 00 ....1........... 00 00 00 00 00 00 00 00 00 00 00 00 03 00 00 00 ................ backtrace: [] kmalloc include/linux/slab.h:554 [inline] [] kzalloc include/linux/slab.h:684 [inline] [] usb_alloc_dev+0x32/0x450 drivers/usb/core/usb.c:582 [] hub_port_connect drivers/usb/core/hub.c:5129 [inline] [] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] [] port_event drivers/usb/core/hub.c:5509 [inline] [] hub_event+0x1171/0x20c0 drivers/usb/core/hub.c:5591 [] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275 [] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421 [] kthread+0x178/0x1b0 kernel/kthread.c:292 [] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Reported-by: syzbot+636c58f40a86b4a879e7@syzkaller.appspotmail.com Fixes: 0f36163d3abe ("usb: fix uss720 schedule with interrupts off") Signed-off-by: Dongliang Mu --- drivers/usb/misc/uss720.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/misc/uss720.c b/drivers/usb/misc/uss720.c index b5d661644263..748139d26263 100644 --- a/drivers/usb/misc/uss720.c +++ b/drivers/usb/misc/uss720.c @@ -736,6 +736,7 @@ static int uss720_probe(struct usb_interface *intf, parport_announce_port(pp); usb_set_intfdata(intf, pp); + usb_put_dev(usbdev); return 0; probe_abort: