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[23.128.96.18]) by mx.google.com with ESMTP id t2si237692ilq.112.2021.05.26.15.06.07; Wed, 26 May 2021 15:06:22 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@mg.codeaurora.org header.s=smtp header.b=asPSq2Z8; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234777AbhEZOiw (ORCPT + 99 others); Wed, 26 May 2021 10:38:52 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:44839 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234632AbhEZOiw (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=1622039840; h=Message-ID: References: In-Reply-To: Subject: Cc: To: From: Date: Content-Transfer-Encoding: Content-Type: MIME-Version: Sender; bh=WrEpK+MxyIabxv4pi0atexsBplGBEOjHKuGt7726NfU=; b=asPSq2Z8uy77rXNM7pkvzwcxgGCdyB/hlZ7Nk/uiKuSP0dy/QzB40NdeNdIpkY/U9w8aW2gq y7qRAfwteEY7E9viBSpHcvQCvxAS5kzQYYjc7xQr1vzM3j4VXaTwwGZLxdRIHm43L+X8hajF tRMXX1vGMvCpIQMqvELByNRo/Vg= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd 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 60ae5d087b5af81b5cfd6e62 (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) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=ALL_TRUSTED,BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.0 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: linux-kernel@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.