From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id E3151471B8 for ; Thu, 8 Jan 2026 15:49:46 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id DD4934027A; Thu, 8 Jan 2026 15:49:46 +0100 (CET) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by mails.dpdk.org (Postfix) with ESMTP id 8AF4740689 for ; Thu, 8 Jan 2026 15:49:45 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1767883785; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=L8MosjpP3h5k3HcA+M6jZUkw1PEHpIT3ALhN2oDvbiQ=; b=gc7kUIZO497PQjFOA/BAFbdSyqsncT8z1d/+HOLkkCquepGP6WFHKnlAIlvERxy1v0//Ti NyEgfPzsqN2ZgRJhyh49nXidEKNoqo1xBYMIiTlYJyQ5Ts4PtTcAFvUXILN3OwZbEc8Hq0 58LxK9dp/S4cmRPqjjCpBmbBShU5AFs= Received: from mail-lf1-f70.google.com (mail-lf1-f70.google.com [209.85.167.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-671-YYp1N1nbMRaw1sPBfhmYrw-1; Thu, 08 Jan 2026 09:49:39 -0500 X-MC-Unique: YYp1N1nbMRaw1sPBfhmYrw-1 X-Mimecast-MFC-AGG-ID: YYp1N1nbMRaw1sPBfhmYrw_1767883778 Received: by mail-lf1-f70.google.com with SMTP id 2adb3069b0e04-59b7a803c5dso557264e87.0 for ; Thu, 08 Jan 2026 06:49:39 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767883778; x=1768488578; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=L8MosjpP3h5k3HcA+M6jZUkw1PEHpIT3ALhN2oDvbiQ=; b=Hg0k4aFqbVU1AU4Dvwd/vlqcyxBIKrCTNRQ7/4zN253V1JeqcaMUaZsI8KcQZMahZv kFnxkdpmioX3DqWmQEAurb2REVtqqTt2wJexxq/3L5faUvPeHNWOIPSkHOc/WNqLLrGD +KVhWat14BwTT+94SLyhJu5teyIwGs3e5jRxa/N1WoxW60iYHYuXmSWEtRxzTjeCWzcM qvsd2byFJG/CCMenMxJM205KJzV5itXSPqz9Ez4v21mlvUpSN+eVBbb5ToLlc4SuJmB5 sdHya0ucedJRlg8czSSS2bx5QTNw0WPikV6p0eocjHprE0/CrF1utDQLc8oT6b7rmE5s 3/eg== X-Forwarded-Encrypted: i=1; AJvYcCUgwEBV1mFB19YbsYA1GIivYpFt+IbMcbo7DfM4VOqcNUaAIKo9x4I32PzIAcmABbg7eWHBMWc=@dpdk.org X-Gm-Message-State: AOJu0YwcJucNcoiHiK8YeEOGK2idHBBX1Un/gYLB3VgPja67yYhXOKON SEYxx699tIIc5CA9psZE+O56KZV2YBkJwMqBZ+DhvdIAN+a2ty2PqU2E9MZigYRQg9PVm5lzQa9 o58CNdRNBfWSfIEpp8rhnthh3iA02l3khqQNs6IHVTvhV+WpONk3iywbggtrij4jw7Y7CRGHJmK pDshw1aryCxzgQ2/XP/oB44bs= X-Gm-Gg: AY/fxX72vSxbnLxssrMOW7C5xz6eC10lfDiRpGaUY6vCjtfwVvngpIbnK8KXMQX94P0 ujQAqUslV/mgsDCOwxsvsgLjw8tSzvlARv3mas6dGBLQK7Bq/+yNx3jBu1hJeTb3/XdTHxQ56Nf XgBn0Q8uQpCyaQibttjfzWQwbGrv60F5ewDtkJULcUf1P+nC6L+UpGNAUEG5uGpbD276bq X-Received: by 2002:a05:6512:224a:b0:594:524d:d966 with SMTP id 2adb3069b0e04-59b6eb641c2mr2079745e87.21.1767883778035; Thu, 08 Jan 2026 06:49:38 -0800 (PST) X-Google-Smtp-Source: AGHT+IFLkuHZBRwQ3AWo4Bh4R7II2gwOW891kALXX5dkgFPr6esf/ESejvBdb/OzEplQ8WJCfysLJfU5NYfdEPJlRZY= X-Received: by 2002:a05:6512:224a:b0:594:524d:d966 with SMTP id 2adb3069b0e04-59b6eb641c2mr2079741e87.21.1767883777604; Thu, 08 Jan 2026 06:49:37 -0800 (PST) MIME-Version: 1.0 References: <20260108134951.3857110-1-maxime.coquelin@redhat.com> <20260108134951.3857110-4-maxime.coquelin@redhat.com> In-Reply-To: <20260108134951.3857110-4-maxime.coquelin@redhat.com> From: David Marchand Date: Thu, 8 Jan 2026 15:49:25 +0100 X-Gm-Features: AQt7F2qRqq2xhEBrWOO53ISHRtYhCIiKMkh0nqK-iAMEr4YzfFWAVnyyeVBzO8c Message-ID: Subject: Re: [PATCH 3/3] vhost: fix mmap error check in VDUSE IOTLB miss handler To: Maxime Coquelin Cc: dev@dpdk.org, chenbox@nvidia.com, stable@dpdk.org X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: Ldqu0Wv-8JsQtrH11jD9MNVgz7Be55XGrCDtdTLDNu4_1767883778 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org On Thu, 8 Jan 2026 at 14:50, Maxime Coquelin wrote: > > The mmap() function returns MAP_FAILED on failure, not NULL. > The current check for !mmap_addr will never detect mmap failures. > > When mmap fails but the error is not detected, an invalid address (-1) > is inserted into the IOTLB cache via vhost_user_iotlb_cache_insert(). > Subsequent attempts to access this address will cause memory > corruption or crash. > > Fix by checking for MAP_FAILED instead of NULL. Also add strerror to > the error message for easier debugging. > > Fixes: f27d5206c598 ("vhost: add VDUSE callback for IOTLB miss") > Cc: stable@dpdk.org > > Signed-off-by: Maxime Coquelin Ugh.. I should have caught it when reviewing initial commit.. Reviewed-by: David Marchand -- David Marchand