From mboxrd@z Thu Jan 1 00:00:00 1970 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=-3.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 2C233C47089 for ; Wed, 26 May 2021 14:37:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 08AD36108D for ; Wed, 26 May 2021 14:37:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234815AbhEZOix (ORCPT ); Wed, 26 May 2021 10:38:53 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:59492 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234432AbhEZOiw (ORCPT ); Wed, 26 May 2021 10:38:52 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1622039841; h=Message-ID: References: In-Reply-To: Subject: Cc: To: From: Date: Content-Transfer-Encoding: Content-Type: MIME-Version: Sender; bh=WrEpK+MxyIabxv4pi0atexsBplGBEOjHKuGt7726NfU=; b=o4QeBu+pm1UVFTR6aKQPz5OOU+sOFcbXOavMGATmq6p+JKMYESSQRKDcK3NT1mverM/G9Jsu mG1+tzMecrr/8fwo/RQebnBnKXAzi7v/BhDlcYGcSo8JkVnGE74vlsLrw4mA2oBgSBlCzjzW /+YnTG5jD9lB8QXYyO+8srXpzmA= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyJiZjI2MiIsICJuZXRkZXZAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n04.prod.us-west-2.postgun.com with SMTP id 60ae5d087b5af81b5cfd6e63 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 26 May 2021 14:36:56 GMT Sender: sharathv=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 1C5F7C4323A; Wed, 26 May 2021 14:36:56 +0000 (UTC) Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: sharathv) by smtp.codeaurora.org (Postfix) with ESMTPSA id 7FCD1C43460; Wed, 26 May 2021 14:36:55 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 26 May 2021 20:06:55 +0530 From: sharathv@codeaurora.org To: Herbert Xu Cc: tgraf@suug.ch, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, edumazet@google.com Subject: Re: Internal error: Oops from inet_frag_find, when inserting a IP frag into a rhashtable In-Reply-To: <20210519112029.3jbw74fuqe4p2tjm@gondor.apana.org.au> References: <997dfef63f2bd14acc2e478758bfc425@codeaurora.org> <20210519112029.3jbw74fuqe4p2tjm@gondor.apana.org.au> Message-ID: <221220f299ac4e6af858ce4e5d877d43@codeaurora.org> X-Sender: sharathv@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 2021-05-19 16:50, Herbert Xu wrote: > On Wed, May 19, 2021 at 12:52:27AM +0530, sharathv@codeaurora.org > wrote: >> >> 784.185172: <2> (2)[71:kworker/2:1][20210408_17:01:54.754415]@2 >> __get_vm_area_node.llvm.17374696036975823682+0x1ac/0x1c8 >> 784.185179: <2> (2)[71:kworker/2:1][20210408_17:01:54.754422]@2 >> __vmalloc_node_flags_caller+0xb4/0x170 >> 784.185189: <2> (2)[71:kworker/2:1][20210408_17:01:54.754432]@2 >> kvmalloc_node+0x40/0xa8 >> 784.185199: <2> (2)[71:kworker/2:1][20210408_17:01:54.754442]@2 >> rhashtable_insert_rehash+0x84/0x264 > > Something very fishy is going on here. > > The code path in rhashtable_insert_rehash cannot possibly trigger > vmalloc because it uses GFP_ATOMIC. Is this a pristine upstream > kernel or are there patches that may change things? > > Cheers, Thanks for the reply Herbert, we have got this crash reported from external folks and I am trying to get the answers for your questions.