From nobody Mon Feb 9 17:47:58 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=umn.edu ARC-Seal: i=1; a=rsa-sha256; t=1592081144; cv=none; d=zohomail.com; s=zohoarc; b=AMfPUTzMzar5qwdBkWcHx8HCVdss+amfEX9DRolH9b0EsFSxLWrmivMZ5HQNuiz6YWjOQ2hW+mSTmWvlkqcqmCc9IEuAWyDthuPiMDVrEFsrsKuxB+feEsacrmCPfD3YoJEDPiMm+SZHp3CJCsiwH9hKG056le/5zWJocmKzHdM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1592081144; h=Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:Sender:Subject:To; bh=o2FOKEQ94D1GV7+5LNDHjuMFh+VY1uzX12Wnv43ZbD8=; b=M7A+mmiGFHj/R5ySfJU8gFwjUZ8lf3ukVKjmP4/9uG37OmZd1eK67Nv2OhjcPbJhf8NG+3Jw204bV/b7Q2qzqdIxk1JTq2/ZgMw6ImVrCc93THuoAJf5QmuQ0qcu4rY38s4jC6324r/7HaN9NyoDvdfeVEZVM/YF2zKzNzDOZLE= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1592081144521248.25628185085293; Sat, 13 Jun 2020 13:45:44 -0700 (PDT) Received: from localhost ([::1]:56392 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jkD26-00011u-GR for importer@patchew.org; Sat, 13 Jun 2020 16:45:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44104) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jkBTV-0008Fo-F4 for qemu-devel@nongnu.org; Sat, 13 Jun 2020 15:05:53 -0400 Received: from mta-p6.oit.umn.edu ([134.84.196.206]:42010) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jkBTS-0000lK-Ms for qemu-devel@nongnu.org; Sat, 13 Jun 2020 15:05:52 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-p6.oit.umn.edu (Postfix) with ESMTP id 49kn9k0tl5z9vBtx for ; Sat, 13 Jun 2020 19:05:46 +0000 (UTC) Received: from mta-p6.oit.umn.edu ([127.0.0.1]) by localhost (mta-p6.oit.umn.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GKlzBj-XfqqA for ; Sat, 13 Jun 2020 14:05:46 -0500 (CDT) Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mta-p6.oit.umn.edu (Postfix) with ESMTPS id 49kn9j6JtRz9vBt2 for ; Sat, 13 Jun 2020 14:05:45 -0500 (CDT) Received: by mail-io1-f72.google.com with SMTP id w2so8510479iom.13 for ; Sat, 13 Jun 2020 12:05:45 -0700 (PDT) Received: from qiushi.cs.umn.edu ([2607:ea00:101:3c74:4874:45:bcb4:df60]) by smtp.gmail.com with ESMTPSA id r17sm5194889ilc.33.2020.06.13.12.05.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 13 Jun 2020 12:05:44 -0700 (PDT) X-Virus-Scanned: amavisd-new at umn.edu DMARC-Filter: OpenDMARC Filter v1.3.2 mta-p6.oit.umn.edu 49kn9j6JtRz9vBt2 DKIM-Filter: OpenDKIM Filter v2.11.0 mta-p6.oit.umn.edu 49kn9j6JtRz9vBt2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=umn.edu; s=google; h=from:to:cc:subject:date:message-id; bh=o2FOKEQ94D1GV7+5LNDHjuMFh+VY1uzX12Wnv43ZbD8=; b=b+T/oLYviKv/mte4B9pdAcQFXVhNY69kXPGrXUU38u3BOUFasXoyr1Kgej9HVkzXxs Ij8d+SfMB2q4QSeN+DyIfLyqpKAcKYYprE5PYt89EyliIe+dP6nEL/71vhcZxEuT6y04 Q3dwBhcpiRRKbpkVWBIHSyEQjrfJbsdW8e0idsDZLGLlJEDjM6LmHO3WP1o1xA2l6uuC RbkC6vl793qCKGP3gEEO9lov999q5Wxe7GsBCkrkX2t1lVYG+PUxmNv9VPVyC1ETO0g5 d82C1xJlw0XCNEIVoziCsfKDJrBoADvu2ELiZ09FPnNJykyk4gPnxGQjoT5eQw9aFedp ua0A== 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; bh=o2FOKEQ94D1GV7+5LNDHjuMFh+VY1uzX12Wnv43ZbD8=; b=qRICZvnSs1dVG4GfZA9IbMnGTqk9VgPDWlBg+BiJv8KSvywRMof8z8vDWn1wYRjaqI vGVZwciW3YmNy4A+AVVzIbRaBfIrt8PZz+1tuFJMVXWA6/SfmkRkHMaNgyK0MZVANv5o XtFkTLW64Ja4xmwEWi4V1yPiWsLA0mj+WuDwKflcaoukn3ScGdQL6m9e0Mtf/xill6qK Ziy6f5wirheR2zD1EQLQzXBh5EI0HirvulffNLO7tOZBUyLHLK3m6qKygQSkRevhCQL7 Kd3qgPsihWwzfQDH2pbp1TCCpx4MDHB4FpnOaXlq+f/5qi9ECdPy1BsAQEYSUcMQinUi bO2A== X-Gm-Message-State: AOAM532yepUGPUi61mgb5U1BxrPZwHbQMMi1fESp13UFkAEWsQXPoinN rE356CSQPmfBqCY6k1rFRjD23qkwujuj45quExxENfTqmnPPreIFkNVBsR+2cUWcYmwIBIpjXt3 6cd74ZJgIDR8qnTIFpVM= X-Received: by 2002:a92:9a5c:: with SMTP id t89mr18359193ili.280.1592075145379; Sat, 13 Jun 2020 12:05:45 -0700 (PDT) X-Google-Smtp-Source: ABdhPJy8tFjRdEjUHCtUKGBzZRi4tcOgtgzZ46cDKJIORr6RvgnfT0GzOC80OcYvuDHb06XXjU6pcA== X-Received: by 2002:a92:9a5c:: with SMTP id t89mr18359175ili.280.1592075145066; Sat, 13 Jun 2020 12:05:45 -0700 (PDT) From: wu000273@umn.edu To: kjlu@umn.edu Cc: wu000273@umn.edu, Gabriel Somlo , "Michael S. Tsirkin" , qemu-devel@nongnu.org, linux-kernel@vger.kernel.org Subject: [PATCH] firmware: Fix a reference count leak. Date: Sat, 13 Jun 2020 14:05:33 -0500 Message-Id: <20200613190533.15712-1-wu000273@umn.edu> X-Mailer: git-send-email 2.17.1 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=134.84.196.206; envelope-from=wu000273@umn.edu; helo=mta-p6.oit.umn.edu X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/13 15:05:46 X-ACL-Warn: Detected OS = Linux 3.11 and newer X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-Mailman-Approved-At: Sat, 13 Jun 2020 16:44:50 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @umn.edu) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Qiushi Wu kobject_init_and_add() takes reference even when it fails. If this function returns an error, kobject_put() must be called to properly clean up the memory associated with the object. Callback function fw_cfg_sysfs_release_entry() in kobject_put() can handle the pointer "entry" properly. Signed-off-by: Qiushi Wu --- drivers/firmware/qemu_fw_cfg.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c index 039e0f91dba8..6945c3c96637 100644 --- a/drivers/firmware/qemu_fw_cfg.c +++ b/drivers/firmware/qemu_fw_cfg.c @@ -605,8 +605,10 @@ static int fw_cfg_register_file(const struct fw_cfg_fi= le *f) /* register entry under "/sys/firmware/qemu_fw_cfg/by_key/" */ err =3D kobject_init_and_add(&entry->kobj, &fw_cfg_sysfs_entry_ktype, fw_cfg_sel_ko, "%d", entry->select); - if (err) - goto err_register; + if (err) { + kobject_put(&entry->kobj); + return err; + } =20 /* add raw binary content access */ err =3D sysfs_create_bin_file(&entry->kobj, &fw_cfg_sysfs_attr_raw); @@ -622,7 +624,6 @@ static int fw_cfg_register_file(const struct fw_cfg_fil= e *f) =20 err_add_raw: kobject_del(&entry->kobj); -err_register: kfree(entry); return err; } --=20 2.17.1