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 Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0B297C433F5 for ; Wed, 2 Mar 2022 13:56:44 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 8FB9F8143F; Wed, 2 Mar 2022 13:56:44 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qVY76Exs5Zu8; Wed, 2 Mar 2022 13:56:43 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp1.osuosl.org (Postfix) with ESMTPS id 34EA681430; Wed, 2 Mar 2022 13:56:43 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id ED0A5C0082; Wed, 2 Mar 2022 13:56:42 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [IPv6:2605:bc80:3010::133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 56EAAC000B for ; Wed, 2 Mar 2022 13:56:41 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 4498B4048A for ; Wed, 2 Mar 2022 13:56:41 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp2.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=linaro.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id gWAcMva_a2D2 for ; Wed, 2 Mar 2022 13:56:39 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from mail-wr1-x431.google.com (mail-wr1-x431.google.com [IPv6:2a00:1450:4864:20::431]) by smtp2.osuosl.org (Postfix) with ESMTPS id BB34D40184 for ; Wed, 2 Mar 2022 13:56:39 +0000 (UTC) Received: by mail-wr1-x431.google.com with SMTP id i8so2921220wrr.8 for ; Wed, 02 Mar 2022 05:56:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to; bh=W8D01UtJzG2MACA/9shiZ9rVVg2i2NMp5ocse6f4EOY=; b=DSob74kIJdRyA0VbXhRgyMD02C0hMXBzKN/Fhe1vuNvwexgeHsxu1/6cQhFmdIekKj NXZ6PvMUfl7oWv0bzCPKv+fo6fihSNCPXKIA76Z5C43Gpb7i2d3ecW8dLwk7pz2rln31 +wKtzYYIl/l5TqmkbNZ7CeOCoFYnbZV7qC2rDjZ3FWiRcWsVNeJH+THOnH7Ld4gWlSbX n3dhyr7AckXvsUx3I5YwQhvskLgWfc8f39bKKB8mufkykzlyGGSAKtPmsQaMn7OldVcv zPHVqUGG7osZzohrjoPERFRQTbXak8QgdGKXGl0wo03Oe7LhcET/FBK7t8dI7VKRWsIa +DPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to; bh=W8D01UtJzG2MACA/9shiZ9rVVg2i2NMp5ocse6f4EOY=; b=y7WvEvz9y0E4eRviyg605cRs4dVcGXrjGG4Wl751GyBFwQ/b5K584Z6F1uOSIpL4LB 5M6iy619PFf0XWf1hyjjrAiw60+QhiMFELxzOUIq9psepQmRNxLXE2cGZAAGwKaY4Vgt 26lcH2seVtZvAYf0keftU2t/Hs3caaoe5sHUT/4gZpFtRkKYKrOHS34X7YsWOcu5jeOf Bk4sg2SGfCJSuZ6xEXLlJHd56CtRMVXgAE+timekazv3K4v3zJiLwP6C2V2xOrkH64iN pU5MUaBka6SoG6B0OUr9fK1HRQCmp5RdFP0KHPGlzTTDtUDtzuj4bOOnSGModrmE+aps Besg== X-Gm-Message-State: AOAM530A3wIw18HSQIFirJZXFCyILqNvOdI5tnAIJlzGp5NTC4weiu8W +wyfmwdhWC2r9lxEQ9aIVw0ZfA== X-Google-Smtp-Source: ABdhPJxvTB4fYUTHq6Q8F0qC+lDtXJO6IvJq9fq5nJHg1+J4qLgqtVZgkoL1Is298lR5PX1g1c4yUQ== X-Received: by 2002:adf:a109:0:b0:1ed:c2bd:8a57 with SMTP id o9-20020adfa109000000b001edc2bd8a57mr22607510wro.612.1646229397976; Wed, 02 Mar 2022 05:56:37 -0800 (PST) Received: from google.com (cpc155339-bagu17-2-0-cust87.1-3.cable.virginm.net. [86.27.177.88]) by smtp.gmail.com with ESMTPSA id t15-20020adfe44f000000b001edbea974cesm16473010wrm.53.2022.03.02.05.56.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Mar 2022 05:56:37 -0800 (PST) Date: Wed, 2 Mar 2022 13:56:35 +0000 From: Lee Jones To: "Michael S. Tsirkin" Subject: Re: [PATCH 1/1] vhost: Protect the virtqueue from being cleared whilst still in use Message-ID: References: <20220302075421.2131221-1-lee.jones@linaro.org> <20220302082021-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220302082021-mutt-send-email-mst@kernel.org> Cc: syzbot+adc3cb32385586bec859@syzkaller.appspotmail.com, kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, virtualization@lists.linux-foundation.org X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" T24gV2VkLCAwMiBNYXIgMjAyMiwgTWljaGFlbCBTLiBUc2lya2luIHdyb3RlOgoKPiBPbiBXZWQs IE1hciAwMiwgMjAyMiBhdCAwNzo1NDoyMUFNICswMDAwLCBMZWUgSm9uZXMgd3JvdGU6Cj4gPiB2 aG9zdF92c29ja19oYW5kbGVfdHhfa2ljaygpIGFscmVhZHkgaG9sZHMgdGhlIG11dGV4IGR1cmlu ZyBpdHMgY2FsbAo+ID4gdG8gdmhvc3RfZ2V0X3ZxX2Rlc2MoKS4gIEFsbCB3ZSBoYXZlIHRvIGRv IGlzIHRha2UgdGhlIHNhbWUgbG9jawo+ID4gZHVyaW5nIHZpcnRxdWV1ZSBjbGVhbi11cCBhbmQg d2UgbWl0aWdhdGUgdGhlIHJlcG9ydGVkIGlzc3Vlcy4KPiA+IAo+ID4gTGluazogaHR0cHM6Ly9z eXprYWxsZXIuYXBwc3BvdC5jb20vYnVnP2V4dGlkPTI3OTQzMmQzMGQ4MjVlNjNiYTAwCj4gPiAK PiA+IENjOiA8c3RhYmxlQHZnZXIua2VybmVsLm9yZz4KPiA+IFJlcG9ydGVkLWJ5OiBzeXpib3Qr YWRjM2NiMzIzODU1ODZiZWM4NTlAc3l6a2FsbGVyLmFwcHNwb3RtYWlsLmNvbQo+ID4gU2lnbmVk LW9mZi1ieTogTGVlIEpvbmVzIDxsZWUuam9uZXNAbGluYXJvLm9yZz4KPiA+IC0tLQo+ID4gIGRy aXZlcnMvdmhvc3Qvdmhvc3QuYyB8IDIgKysKPiA+ICAxIGZpbGUgY2hhbmdlZCwgMiBpbnNlcnRp b25zKCspCj4gPiAKPiA+IGRpZmYgLS1naXQgYS9kcml2ZXJzL3Zob3N0L3Zob3N0LmMgYi9kcml2 ZXJzL3Zob3N0L3Zob3N0LmMKPiA+IGluZGV4IDU5ZWRiNWExZmZlMjguLmJiYWZmNmE1ZTIxYjgg MTAwNjQ0Cj4gPiAtLS0gYS9kcml2ZXJzL3Zob3N0L3Zob3N0LmMKPiA+ICsrKyBiL2RyaXZlcnMv dmhvc3Qvdmhvc3QuYwo+ID4gQEAgLTY5Myw2ICs2OTMsNyBAQCB2b2lkIHZob3N0X2Rldl9jbGVh bnVwKHN0cnVjdCB2aG9zdF9kZXYgKmRldikKPiA+ICAJaW50IGk7Cj4gPiAgCj4gPiAgCWZvciAo aSA9IDA7IGkgPCBkZXYtPm52cXM7ICsraSkgewo+ID4gKwkJbXV0ZXhfbG9jaygmZGV2LT52cXNb aV0tPm11dGV4KTsKPiA+ICAJCWlmIChkZXYtPnZxc1tpXS0+ZXJyb3JfY3R4KQo+ID4gIAkJCWV2 ZW50ZmRfY3R4X3B1dChkZXYtPnZxc1tpXS0+ZXJyb3JfY3R4KTsKPiA+ICAJCWlmIChkZXYtPnZx c1tpXS0+a2ljaykKPiA+IEBAIC03MDAsNiArNzAxLDcgQEAgdm9pZCB2aG9zdF9kZXZfY2xlYW51 cChzdHJ1Y3Qgdmhvc3RfZGV2ICpkZXYpCj4gPiAgCQlpZiAoZGV2LT52cXNbaV0tPmNhbGxfY3R4 LmN0eCkKPiA+ICAJCQlldmVudGZkX2N0eF9wdXQoZGV2LT52cXNbaV0tPmNhbGxfY3R4LmN0eCk7 Cj4gPiAgCQl2aG9zdF92cV9yZXNldChkZXYsIGRldi0+dnFzW2ldKTsKPiA+ICsJCW11dGV4X3Vu bG9jaygmZGV2LT52cXNbaV0tPm11dGV4KTsKPiA+ICAJfQo+IAo+IFNvIHRoaXMgaXMgYSBtaXRp Z2F0aW9uIHBsYW4gYnV0IHRoZSBidWcgaXMgc3RpbGwgdGhlcmUgdGhvdWdoCj4gd2UgZG9uJ3Qg a25vdyBleGFjdGx5IHdoYXQgaXQgaXMuICBJIHdvdWxkIHByZWZlciBhZGRpbmcgc29tZXRoaW5n IGxpa2UKPiBXQVJOX09OKG11dGV4X2lzX2xvY2tlZCh2cXNbaV0tPm11dGV4KSBoZXJlIC0gZG9l cyB0aGlzIG1ha2Ugc2Vuc2U/CgpBcyBhIHJld29yayB0byB0aGlzLCBvciBhcyBhIHN1YnNlcXVl bnQgcGF0Y2g/CgpKdXN0IGJlZm9yZSB0aGUgZmlyc3QgbG9jayBJIGFzc3VtZT8KCi0tIApMZWUg Sm9uZXMgW+adjueQvOaWr10KUHJpbmNpcGFsIFRlY2huaWNhbCBMZWFkIC0gRGV2ZWxvcGVyIFNl cnZpY2VzCkxpbmFyby5vcmcg4pSCIE9wZW4gc291cmNlIHNvZnR3YXJlIGZvciBBcm0gU29DcwpG b2xsb3cgTGluYXJvOiBGYWNlYm9vayB8IFR3aXR0ZXIgfCBCbG9nCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClZpcnR1YWxpemF0aW9uIG1haWxpbmcgbGlz dApWaXJ0dWFsaXphdGlvbkBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3Rz LmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby92aXJ0dWFsaXphdGlvbg==