From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id A169EA04A3 for ; Fri, 5 Jun 2020 20:26:48 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 98F071D510; Fri, 5 Jun 2020 20:26:48 +0200 (CEST) Received: from us-smtp-delivery-1.mimecast.com (us-smtp-1.mimecast.com [207.211.31.81]) by dpdk.org (Postfix) with ESMTP id EC71C1D51B for ; Fri, 5 Jun 2020 20:26:46 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1591381606; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=J9G2fGqBPvkBndEsudSC1MSZWn8nFLFZ1h6cMRmm24w=; b=I3Sagnb2CqeFugUDMm4peREpuMYRnFzFrc9HMSFsGdqSYeQ2DxFpIObT2Kguq/W+aF4/Gy uYe81RAY6plrcIrHmUbotz8SZPPwgyzqoe3Mdl54oEyQbkRsJBzyRz0XBZNfIv188p/ILt oPydylsv+DJWpaTDEwwOhqVJMwX1yYs= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-417-LZMCB6zMNfSDwv8hkG8VBQ-1; Fri, 05 Jun 2020 14:26:43 -0400 X-MC-Unique: LZMCB6zMNfSDwv8hkG8VBQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 27E75884DE6; Fri, 5 Jun 2020 18:26:40 +0000 (UTC) Received: from rh.redhat.com (unknown [10.33.36.130]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3B4BE19063; Fri, 5 Jun 2020 18:26:39 +0000 (UTC) From: Kevin Traynor To: Bing Zhao Cc: Anatoly Burakov , dpdk stable Date: Fri, 5 Jun 2020 19:24:21 +0100 Message-Id: <20200605182525.22483-24-ktraynor@redhat.com> In-Reply-To: <20200605182525.22483-1-ktraynor@redhat.com> References: <20200605182525.22483-1-ktraynor@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Subject: [dpdk-stable] patch 'mem: fix overflow on allocation' has been queued to LTS release 18.11.9 X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 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 Sender: "stable" Hi, FYI, your patch has been queued to LTS release 18.11.9 Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet. It will be pushed if I get no objections before 06/10/20. So please shout if anyone has objections. Also note that after the patch there's a diff of the upstream commit vs the patch applied to the branch. This will indicate if there was any rebasing needed to apply to the stable branch. If there were code changes for rebasing (ie: not only metadata diffs), please double check that the rebase was correctly done. Queued patches are on a temporary branch at: https://github.com/kevintraynor/dpdk-stable-queue This queued commit can be viewed at: https://github.com/kevintraynor/dpdk-stable-queue/commit/246bd855dff27be510ab98af9629124d3f610cd4 Thanks. Kevin. --- >From 246bd855dff27be510ab98af9629124d3f610cd4 Mon Sep 17 00:00:00 2001 From: Bing Zhao Date: Thu, 7 May 2020 16:02:54 +0800 Subject: [PATCH] mem: fix overflow on allocation [ upstream commit b341a09c1dd3664b43d5b3a91b6a83136f2d4a12 ] The size checking is done in the caller. The size parameter is an unsigned (64b wide) right now, so the comparison with zero should be enough in most cases. But it won't help in the following case. If the allocating request input a huge number by mistake, e.g., some overflow after the calculation (especially subtraction), the checking in the caller will succeed since it is not zero. Indeed, there is not enough space in the system to support such huge memory allocation. Usually it will return failure in the following code. But if the input size is just a little smaller than the UINT64_MAX, like -2 in signed type. The roundup will cause an overflow and then "reset" the size to 0, and then only a header (128B now) with zero length will be returned. The following will be the previous allocation header. It should be OK in most cases if the application won't access the memory body. Or else, some critical issue will be caused and not easy to debug. So this issue should be prevented at the beginning, like other big size failure, NULL pointer should be returned also. Fixes: fdf20fa7bee9 ("add prefix to cache line macros") Signed-off-by: Bing Zhao Acked-by: Anatoly Burakov --- lib/librte_eal/common/malloc_heap.c | 3 +++ test/test/test_malloc.c | 12 ++++++++++++ 2 files changed, 15 insertions(+) diff --git a/lib/librte_eal/common/malloc_heap.c b/lib/librte_eal/common/malloc_heap.c index b8f26f2b37..de3b73e8c5 100644 --- a/lib/librte_eal/common/malloc_heap.c +++ b/lib/librte_eal/common/malloc_heap.c @@ -239,4 +239,7 @@ heap_alloc(struct malloc_heap *heap, const char *type __rte_unused, size_t size, align = RTE_CACHE_LINE_ROUNDUP(align); + /* roundup might cause an overflow */ + if (size == 0) + return NULL; elem = find_suitable_element(heap, size, flags, align, bound, contig); if (elem != NULL) { diff --git a/test/test/test_malloc.c b/test/test/test_malloc.c index 5e52724194..20788011ad 100644 --- a/test/test/test_malloc.c +++ b/test/test/test_malloc.c @@ -698,4 +698,16 @@ test_malloc_bad_params(void) goto err_return; + /* rte_malloc expected to return null with size will cause overflow */ + align = RTE_CACHE_LINE_SIZE; + size = (size_t)-8; + + bad_ptr = rte_malloc(type, size, align); + if (bad_ptr != NULL) + goto err_return; + + bad_ptr = rte_realloc(NULL, size, align); + if (bad_ptr != NULL) + goto err_return; + return 0; -- 2.21.3 --- Diff of the applied patch vs upstream commit (please double-check if non-empty: --- --- - 2020-06-05 19:20:52.213127889 +0100 +++ 0024-mem-fix-overflow-on-allocation.patch 2020-06-05 19:20:50.750042176 +0100 @@ -1 +1 @@ -From b341a09c1dd3664b43d5b3a91b6a83136f2d4a12 Mon Sep 17 00:00:00 2001 +From 246bd855dff27be510ab98af9629124d3f610cd4 Mon Sep 17 00:00:00 2001 @@ -5,0 +6,2 @@ +[ upstream commit b341a09c1dd3664b43d5b3a91b6a83136f2d4a12 ] + @@ -25 +26,0 @@ -Cc: stable@dpdk.org @@ -30 +30,0 @@ - app/test/test_malloc.c | 12 ++++++++++++ @@ -31,0 +32 @@ + test/test/test_malloc.c | 12 ++++++++++++ @@ -34,5 +35,17 @@ -diff --git a/app/test/test_malloc.c b/app/test/test_malloc.c -index 40a2f500cd..71b3cfdde5 100644 ---- a/app/test/test_malloc.c -+++ b/app/test/test_malloc.c -@@ -847,4 +847,16 @@ test_malloc_bad_params(void) +diff --git a/lib/librte_eal/common/malloc_heap.c b/lib/librte_eal/common/malloc_heap.c +index b8f26f2b37..de3b73e8c5 100644 +--- a/lib/librte_eal/common/malloc_heap.c ++++ b/lib/librte_eal/common/malloc_heap.c +@@ -239,4 +239,7 @@ heap_alloc(struct malloc_heap *heap, const char *type __rte_unused, size_t size, + align = RTE_CACHE_LINE_ROUNDUP(align); + ++ /* roundup might cause an overflow */ ++ if (size == 0) ++ return NULL; + elem = find_suitable_element(heap, size, flags, align, bound, contig); + if (elem != NULL) { +diff --git a/test/test/test_malloc.c b/test/test/test_malloc.c +index 5e52724194..20788011ad 100644 +--- a/test/test/test_malloc.c ++++ b/test/test/test_malloc.c +@@ -698,4 +698,16 @@ test_malloc_bad_params(void) @@ -55,12 +67,0 @@ -diff --git a/lib/librte_eal/common/malloc_heap.c b/lib/librte_eal/common/malloc_heap.c -index 842eb9de75..bd5065698d 100644 ---- a/lib/librte_eal/common/malloc_heap.c -+++ b/lib/librte_eal/common/malloc_heap.c -@@ -242,4 +242,7 @@ heap_alloc(struct malloc_heap *heap, const char *type __rte_unused, size_t size, - align = RTE_CACHE_LINE_ROUNDUP(align); - -+ /* roundup might cause an overflow */ -+ if (size == 0) -+ return NULL; - elem = find_suitable_element(heap, size, flags, align, bound, contig); - if (elem != NULL) {