From patchwork Tue Mar 31 08:58:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 228674 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=-6.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 644A0C2D0E8 for ; Tue, 31 Mar 2020 09:06:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 393B720B80 for ; Tue, 31 Mar 2020 09:06:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585645572; bh=CY/wbAodfT00hdTU5A7Rz1+tsKBLLbSu1NJDFYyHIy4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=UVbg3i3kNIREEdH5Qi/fGkjhC2ePoIJFAFpLLfYjslACMTGbfCCQu1bi1CTIXYeQ6 NxI1q9J3fDnXNWOuJkrXmCeQV6as9Wi0sDKFuOOb5+v3HJbbtg8mI3JlhHE8AcFGiq SbzOE0q6HSgVDsPppK8v+i44ABvpnBJK0jLnEfEs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731003AbgCaJGK (ORCPT ); Tue, 31 Mar 2020 05:06:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:47462 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731110AbgCaJGI (ORCPT ); Tue, 31 Mar 2020 05:06:08 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DC84C20787; Tue, 31 Mar 2020 09:06:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585645568; bh=CY/wbAodfT00hdTU5A7Rz1+tsKBLLbSu1NJDFYyHIy4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FkH6Rcw2MUV99AvSWg6ncCRUrE0xgka55sihZufwHL7w2pIAPIqyyj8xnGv+4kwUW ed1dYstZM8jlpcSjYrfG7cnHJFWa9jxGemOk2l0rfZMjf/+wV/LonI/s2824myKJ4I yLC0wnQEHB05WkOCdtecqJW5/b4lXMgmE/vyJzeI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Luis Henriques , Jeff Layton , Ilya Dryomov Subject: [PATCH 5.5 093/170] ceph: fix memory leak in ceph_cleanup_snapid_map() Date: Tue, 31 Mar 2020 10:58:27 +0200 Message-Id: <20200331085434.134918164@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200331085423.990189598@linuxfoundation.org> References: <20200331085423.990189598@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Luis Henriques commit c8d6ee01449cd0d2f30410681cccb616a88f50b1 upstream. kmemleak reports the following memory leak: unreferenced object 0xffff88821feac8a0 (size 96): comm "kworker/1:0", pid 17, jiffies 4294896362 (age 20.512s) hex dump (first 32 bytes): a0 c8 ea 1f 82 88 ff ff 00 c9 ea 1f 82 88 ff ff ................ 00 00 00 00 00 00 00 00 00 01 00 00 00 00 ad de ................ backtrace: [<00000000b3ea77fb>] ceph_get_snapid_map+0x75/0x2a0 [<00000000d4060942>] fill_inode+0xb26/0x1010 [<0000000049da6206>] ceph_readdir_prepopulate+0x389/0xc40 [<00000000e2fe2549>] dispatch+0x11ab/0x1521 [<000000007700b894>] ceph_con_workfn+0xf3d/0x3240 [<0000000039138a41>] process_one_work+0x24d/0x590 [<00000000eb751f34>] worker_thread+0x4a/0x3d0 [<000000007e8f0d42>] kthread+0xfb/0x130 [<00000000d49bd1fa>] ret_from_fork+0x3a/0x50 A kfree is missing while looping the 'to_free' list of ceph_snapid_map objects. Cc: stable@vger.kernel.org Fixes: 75c9627efb72 ("ceph: map snapid to anonymous bdev ID") Signed-off-by: Luis Henriques Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov Signed-off-by: Greg Kroah-Hartman --- fs/ceph/snap.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -1155,5 +1155,6 @@ void ceph_cleanup_snapid_map(struct ceph pr_err("snapid map %llx -> %x still in use\n", sm->snap, sm->dev); } + kfree(sm); } }