From patchwork Tue Jun 12 04:16:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhouyang Jia X-Patchwork-Id: 10459221 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2E6BA602A0 for ; Tue, 12 Jun 2018 04:16:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1DD0A28617 for ; Tue, 12 Jun 2018 04:16:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 11FEE2863B; Tue, 12 Jun 2018 04:16:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C1F7228617 for ; Tue, 12 Jun 2018 04:16:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752494AbeFLEQL (ORCPT ); Tue, 12 Jun 2018 00:16:11 -0400 Received: from mail-pf0-f193.google.com ([209.85.192.193]:33643 "EHLO mail-pf0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750811AbeFLEQK (ORCPT ); Tue, 12 Jun 2018 00:16:10 -0400 Received: by mail-pf0-f193.google.com with SMTP id b17-v6so11392953pfi.0; Mon, 11 Jun 2018 21:16:10 -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; bh=2e58dYCyHjCrRMzvDJHZ4B3vN5K2NBtjTra2hTQl9ng=; b=p0NXaujO2gFA7R17e3n4gMS9ahNGRQy4ijuKc8o2+xegxT11KFX3m/Rv4CboJfE0QB p1WSsJo33JB4aAKxCY5lb9Uh5qNBw3Wy2mAX85452Yk164l/Anmp2YIjO8D7QwLJMk4c uUqO295UNoAVxMRdPf4MECuFIr5MiW5CkxPDIo9+YnAnzr5i0YPUKXj3k8voAGI9Ndr0 IvZ7b8hlWzCI4lp+pqrCRB9T0rP7noaUu5DpikAJMgJHGRCBVj6ZeFwwqihh0CEYj+UE CgG35ZNej49VhqMnRuNedfYgPv5fjygZWWJ0jY2Dq5nYl4d9Vo8vqtcXeYWoOprFZbfv VoKw== 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=2e58dYCyHjCrRMzvDJHZ4B3vN5K2NBtjTra2hTQl9ng=; b=FWx6+4T2ewYjn3VXPkSf6DHiTCVEXO6riUZlT6E+4iuxZC2JoHi/uHXfj8bo6huw2D 0ib/kiWVbW9FW0UalAZcJhVcRRqga+0XoZRKfQQ3KCuwnDFeO8V1bQTQTEXvbVLX+Fb/ grnZT37yanBfzQnlyNVL/zN2+UtriPaoyObzO8fr2bi/gk3WkOHBVZj8iaXj2epK3H+k OGp2rXFkcIHpn04vZfnUv+XhUrjtQPVVQcXgh/3+7viwgKXOFtOOuvNDIVc3UFbhkYBF wcgL17RJoDHNKNqdI5lCvtnbZtAFJqBZApcNNonw3wR4ZtSQbfBJTT/DU8qa7P7BrEWa IuzQ== X-Gm-Message-State: APt69E0wEcIYp9uM8hl82CqMj7C+UPepZv+S9hS2FIfkcXjLmvS91cTM mChcJqcWcIIsrQ0MfMJ25M2DMtEXyiA= X-Google-Smtp-Source: ADUXVKIwgQkKnUqfzzLCJk1ELh0L13YYQ9beOblajiYPwd132z3Ja7+hk/QVyYwQPRJyZ/bwL4lGSA== X-Received: by 2002:a62:e401:: with SMTP id r1-v6mr2092542pfh.172.1528776970506; Mon, 11 Jun 2018 21:16:10 -0700 (PDT) Received: from localhost ([103.88.46.82]) by smtp.gmail.com with ESMTPSA id a11-v6sm103315474pgn.64.2018.06.11.21.16.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 11 Jun 2018 21:16:09 -0700 (PDT) From: Zhouyang Jia Cc: Zhouyang Jia , Jan Kara , Amir Goldstein , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] fsnotify: add error handling for kmem_cache_create Date: Tue, 12 Jun 2018 12:16:04 +0800 Message-Id: <1528776964-39826-1-git-send-email-jiazhouyang09@gmail.com> X-Mailer: git-send-email 2.7.4 To: unlisted-recipients:; (no To-header on input) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When kmem_cache_create fails, the lack of error-handling code may cause unexpected results. This patch adds error-handling code after calling kmem_cache_create. Signed-off-by: Zhouyang Jia --- fs/notify/dnotify/dnotify.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c index 63a1ca4..216b411 100644 --- a/fs/notify/dnotify/dnotify.c +++ b/fs/notify/dnotify/dnotify.c @@ -387,6 +387,9 @@ static int __init dnotify_init(void) dnotify_struct_cache = KMEM_CACHE(dnotify_struct, SLAB_PANIC); dnotify_mark_cache = KMEM_CACHE(dnotify_mark, SLAB_PANIC); + if (!dnotify_struct_cache || !dnotify_mark_cache) + return -ENOMEM; + dnotify_group = fsnotify_alloc_group(&dnotify_fsnotify_ops); if (IS_ERR(dnotify_group)) panic("unable to allocate fsnotify group for dnotify\n");