From patchwork Mon Feb 7 11:31:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ani Sinha X-Patchwork-Id: 12737153 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 C2469C433EF for ; Mon, 7 Feb 2022 11:55:07 +0000 (UTC) Received: from localhost ([::1]:55996 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nH2bq-0003uN-RU for qemu-devel@archiver.kernel.org; Mon, 07 Feb 2022 06:55:06 -0500 Received: from eggs.gnu.org ([209.51.188.92]:47722) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nH2GO-00084O-8M for qemu-devel@nongnu.org; Mon, 07 Feb 2022 06:32:56 -0500 Received: from [2607:f8b0:4864:20::634] (port=33300 helo=mail-pl1-x634.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nH2GM-0001ig-A2 for qemu-devel@nongnu.org; Mon, 07 Feb 2022 06:32:55 -0500 Received: by mail-pl1-x634.google.com with SMTP id k17so10933441plk.0 for ; Mon, 07 Feb 2022 03:32:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=anisinha-ca.20210112.gappssmtp.com; s=20210112; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=HQH3eWFR7IKexMJlde1CSSYstj0sV5D8nhe7VhsYT0s=; b=zoULr9lVdivbCAu6PdlqeWuOHYzTlFJbR6SCCI+65agVnPHHak/RefZxp/CCE8+Zgn ut7f/SdzxBwslGXYmkjCigCXl0ZU79y5LgPdFOqJ2oZP5HIv8/TTm/OYqGIvKljLuB9b IG35LFLt0SZ97ou/Fh2sK9IigPoKJ+2X/TaIT/7wi48f249v9oyVHbp0nMfeYCm6rtOO +FF3xiSgGdb5HSB7TimsgxIaXXFgVn87kO0sFtcZbs8NzYdyU0HzuEYTpGUmzjcLpWv4 GYL2JuJSyb+42nQRjBINYm3HxSnAo74mRoe9FLjHI7dB3Hg7M1oqChBQmefdM4UgDfLj 6KYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HQH3eWFR7IKexMJlde1CSSYstj0sV5D8nhe7VhsYT0s=; b=KlTAp0JlPutG3IJu9F6qnZM+hu/ukRfft5a+FFOm2f+/54D7EpirChZR1SnEnYo7GK 4GFCSuKHbnPV20M6XN266wC0tXKelq3xvlOUcExLeXWJuRxng678dmlYg+zS6hS7pjB5 +X3ATf3BRPZ36i1e4zI3gqMdb6JIkUyBJ9+Ymes3S+RFLuYiUMj36g1OZ4bbe7cqIMUm Uc5lZO3tlRQQ/ojmNxSvfd7NEiVU+ax22fIykIpj+c5Z4kJw3Ubggg+h9//U4ZK7+xBu yf3D5Zi/sf5t+8iUllo/yB0cq1TOB0RPJ2oLlIpOT3BhUD1efVsq6Oc67kquJXc5zg1K V3Iw== X-Gm-Message-State: AOAM531eP3Ciw3WBNEEyZSIzy5b1l1KPGCJ5mCEl0z7u1dBnx/S0zYTQ /xu48+DYh3VrDf3LXyWuc8xzhnjsAVm7upNvxtUC1w== X-Google-Smtp-Source: ABdhPJybV91zKm69JFDVnsMexiJyi8ElKWF9a/YBlyk0n3KMAp5yuw3ae8HznisThaYd97glQZUXIw== X-Received: by 2002:a17:90b:4d82:: with SMTP id oj2mr13579085pjb.77.1644233572579; Mon, 07 Feb 2022 03:32:52 -0800 (PST) Received: from anisinha-lenovo.ba.nuagenetworks.net ([203.212.242.56]) by smtp.googlemail.com with ESMTPSA id h14sm13016345pfh.95.2022.02.07.03.32.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Feb 2022 03:32:52 -0800 (PST) From: Ani Sinha To: qemu-devel@nongnu.org, "Michael S. Tsirkin" , Igor Mammedov , Ani Sinha Subject: [PATCH v2 1/3] hw/smbios: code cleanup - use macro definitions for table base addresses Date: Mon, 7 Feb 2022 17:01:27 +0530 Message-Id: <20220207113129.2701722-2-ani@anisinha.ca> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220207113129.2701722-1-ani@anisinha.ca> References: <20220207113129.2701722-1-ani@anisinha.ca> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::634 (failed) Received-SPF: none client-ip=2607:f8b0:4864:20::634; envelope-from=ani@anisinha.ca; helo=mail-pl1-x634.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is a minor cleanup. Using macro definitions makes the code more readable. It is at once clear which tables use which starting base addresses. It also makes it easy to calculate the gaps between the addresses and modify them if needed. Signed-off-by: Ani Sinha Reviewed-by: Igor Mammedov --- hw/smbios/smbios.c | 38 ++++++++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 12 deletions(-) diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c index 6013df1698..56b412ce35 100644 --- a/hw/smbios/smbios.c +++ b/hw/smbios/smbios.c @@ -549,9 +549,23 @@ bool smbios_skip_table(uint8_t type, bool required_table) return true; } +#define T0_BASE 0x000 +#define T1_BASE 0x100 +#define T2_BASE 0x200 +#define T3_BASE 0x300 +#define T4_BASE 0x400 +#define T11_BASE 0xe00 + +#define T16_BASE 0x1000 +#define T17_BASE 0x1100 +#define T19_BASE 0x1300 +#define T32_BASE 0x2000 +#define T41_BASE 0x2900 +#define T127_BASE 0x7F00 + static void smbios_build_type_0_table(void) { - SMBIOS_BUILD_TABLE_PRE(0, 0x000, false); /* optional, leave up to BIOS */ + SMBIOS_BUILD_TABLE_PRE(0, T0_BASE, false); /* optional, leave up to BIOS */ SMBIOS_TABLE_SET_STR(0, vendor_str, type0.vendor); SMBIOS_TABLE_SET_STR(0, bios_version_str, type0.version); @@ -599,7 +613,7 @@ static void smbios_encode_uuid(struct smbios_uuid *uuid, QemuUUID *in) static void smbios_build_type_1_table(void) { - SMBIOS_BUILD_TABLE_PRE(1, 0x100, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(1, T1_BASE, true); /* required */ SMBIOS_TABLE_SET_STR(1, manufacturer_str, type1.manufacturer); SMBIOS_TABLE_SET_STR(1, product_name_str, type1.product); @@ -619,7 +633,7 @@ static void smbios_build_type_1_table(void) static void smbios_build_type_2_table(void) { - SMBIOS_BUILD_TABLE_PRE(2, 0x200, false); /* optional */ + SMBIOS_BUILD_TABLE_PRE(2, T2_BASE, false); /* optional */ SMBIOS_TABLE_SET_STR(2, manufacturer_str, type2.manufacturer); SMBIOS_TABLE_SET_STR(2, product_str, type2.product); @@ -637,7 +651,7 @@ static void smbios_build_type_2_table(void) static void smbios_build_type_3_table(void) { - SMBIOS_BUILD_TABLE_PRE(3, 0x300, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(3, T3_BASE, true); /* required */ SMBIOS_TABLE_SET_STR(3, manufacturer_str, type3.manufacturer); t->type = 0x01; /* Other */ @@ -662,7 +676,7 @@ static void smbios_build_type_4_table(MachineState *ms, unsigned instance) { char sock_str[128]; - SMBIOS_BUILD_TABLE_PRE(4, 0x400 + instance, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(4, T4_BASE + instance, true); /* required */ snprintf(sock_str, sizeof(sock_str), "%s%2x", type4.sock_pfx, instance); SMBIOS_TABLE_SET_STR(4, socket_designation_str, sock_str); @@ -702,7 +716,7 @@ static void smbios_build_type_11_table(void) return; } - SMBIOS_BUILD_TABLE_PRE(11, 0xe00, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(11, T11_BASE, true); /* required */ snprintf(count_str, sizeof(count_str), "%zu", type11.nvalues); t->count = type11.nvalues; @@ -722,7 +736,7 @@ static void smbios_build_type_16_table(unsigned dimm_cnt) { uint64_t size_kb; - SMBIOS_BUILD_TABLE_PRE(16, 0x1000, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(16, T16_BASE, true); /* required */ t->location = 0x01; /* Other */ t->use = 0x03; /* System memory */ @@ -749,7 +763,7 @@ static void smbios_build_type_17_table(unsigned instance, uint64_t size) char loc_str[128]; uint64_t size_mb; - SMBIOS_BUILD_TABLE_PRE(17, 0x1100 + instance, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(17, T17_BASE + instance, true); /* required */ t->physical_memory_array_handle = cpu_to_le16(0x1000); /* Type 16 above */ t->memory_error_information_handle = cpu_to_le16(0xFFFE); /* Not provided */ @@ -790,7 +804,7 @@ static void smbios_build_type_19_table(unsigned instance, { uint64_t end, start_kb, end_kb; - SMBIOS_BUILD_TABLE_PRE(19, 0x1300 + instance, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(19, T19_BASE + instance, true); /* required */ end = start + size - 1; assert(end > start); @@ -814,7 +828,7 @@ static void smbios_build_type_19_table(unsigned instance, static void smbios_build_type_32_table(void) { - SMBIOS_BUILD_TABLE_PRE(32, 0x2000, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(32, T32_BASE, true); /* required */ memset(t->reserved, 0, 6); t->boot_status = 0; /* No errors detected */ @@ -828,7 +842,7 @@ static void smbios_build_type_41_table(Error **errp) struct type41_instance *t41; QTAILQ_FOREACH(t41, &type41, next) { - SMBIOS_BUILD_TABLE_PRE(41, 0x2900 + instance, true); + SMBIOS_BUILD_TABLE_PRE(41, T41_BASE + instance, true); SMBIOS_TABLE_SET_STR(41, reference_designation_str, t41->designation); t->device_type = t41->kind; @@ -871,7 +885,7 @@ static void smbios_build_type_41_table(Error **errp) static void smbios_build_type_127_table(void) { - SMBIOS_BUILD_TABLE_PRE(127, 0x7F00, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(127, T127_BASE, true); /* required */ SMBIOS_BUILD_TABLE_POST; } From patchwork Mon Feb 7 11:31:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ani Sinha X-Patchwork-Id: 12737143 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 E0179C433F5 for ; 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Mon, 07 Feb 2022 03:32:55 -0800 (PST) Received: from anisinha-lenovo.ba.nuagenetworks.net ([203.212.242.56]) by smtp.googlemail.com with ESMTPSA id h14sm13016345pfh.95.2022.02.07.03.32.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Feb 2022 03:32:54 -0800 (PST) From: Ani Sinha To: qemu-devel@nongnu.org, "Michael S. Tsirkin" , Igor Mammedov , Ani Sinha Subject: [PATCH v2 2/3] hw/smbios: fix table memory corruption with large memory vms Date: Mon, 7 Feb 2022 17:01:28 +0530 Message-Id: <20220207113129.2701722-3-ani@anisinha.ca> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220207113129.2701722-1-ani@anisinha.ca> References: <20220207113129.2701722-1-ani@anisinha.ca> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::436 (failed) Received-SPF: none client-ip=2607:f8b0:4864:20::436; envelope-from=ani@anisinha.ca; helo=mail-pf1-x436.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" With the current smbios table assignment code, we can have only 512 DIMM slots (each DIMM of 16 GiB in size) before tables 17 and 19 conflict with their addresses. A guest with more than 8 TiB of memory will hit this limitation and would fail with the following assertion in isa-debugcon: ASSERT_EFI_ERROR (Status = Already started) ASSERT /builddir/build/BUILD/edk2-ca407c7246bf/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c(125): !EFI_ERROR (Status) This change adds an additional offset between tables 17 and 19 when configuring VMs larger than 8 TiB of memory. The value of the offset is calculated to be equal to the additional space required to be reserved between the tables in order to accomodate more DIMM devices without the table memories colliding. In normal cases where the VM memory is smaller or equal to 8 TiB, this offset value is 0. Hence in this case, no additional memory space is reserved and table addresses remain as before. Since table addresses are altered for large memory VMs, this change can break migration in those cases. However, in those situations, qemu crashes anyway without this fix and hence we do not preserve the old bug by introducing compat knobs/machine types. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2023977 Signed-off-by: Ani Sinha --- hw/smbios/smbios.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c index 56b412ce35..d7de740363 100644 --- a/hw/smbios/smbios.c +++ b/hw/smbios/smbios.c @@ -799,12 +799,13 @@ static void smbios_build_type_17_table(unsigned instance, uint64_t size) SMBIOS_BUILD_TABLE_POST; } -static void smbios_build_type_19_table(unsigned instance, +static void smbios_build_type_19_table(unsigned instance, unsigned offset, uint64_t start, uint64_t size) { uint64_t end, start_kb, end_kb; - SMBIOS_BUILD_TABLE_PRE(19, T19_BASE + instance, true); /* required */ + SMBIOS_BUILD_TABLE_PRE(19, T19_BASE + offset + instance, + true); /* required */ end = start + size - 1; assert(end > start); @@ -996,7 +997,7 @@ void smbios_get_tables(MachineState *ms, uint8_t **anchor, size_t *anchor_len, Error **errp) { - unsigned i, dimm_cnt; + unsigned i, dimm_cnt, offset; if (smbios_legacy) { *tables = *anchor = NULL; @@ -1026,6 +1027,16 @@ void smbios_get_tables(MachineState *ms, dimm_cnt = QEMU_ALIGN_UP(current_machine->ram_size, MAX_DIMM_SZ) / MAX_DIMM_SZ; + /* + * The offset determines if we need to keep additional space betweeen + * table 17 and table 19 so that they do not overlap. For example, + * for a VM with larger than 8 TB guest memory and DIMM size of 16 GiB, + * the default space between the two tables (T19_BASE - T17_BASE = 512) + * is not enough. + */ + offset = (dimm_cnt > (T19_BASE - T17_BASE)) ? \ + dimm_cnt - (T19_BASE - T17_BASE) : 0; + smbios_build_type_16_table(dimm_cnt); for (i = 0; i < dimm_cnt; i++) { @@ -1033,7 +1044,7 @@ void smbios_get_tables(MachineState *ms, } for (i = 0; i < mem_array_size; i++) { - smbios_build_type_19_table(i, mem_array[i].address, + smbios_build_type_19_table(i, offset, mem_array[i].address, mem_array[i].length); } From patchwork Mon Feb 7 11:31:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ani Sinha X-Patchwork-Id: 12737142 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 CC2F9C433F5 for ; Mon, 7 Feb 2022 11:36:36 +0000 (UTC) Received: from localhost ([::1]:58650 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nH2Jv-0002UE-HQ for qemu-devel@archiver.kernel.org; Mon, 07 Feb 2022 06:36:35 -0500 Received: from eggs.gnu.org ([209.51.188.92]:47782) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nH2GW-0008AJ-CO for qemu-devel@nongnu.org; Mon, 07 Feb 2022 06:33:04 -0500 Received: from [2607:f8b0:4864:20::429] (port=41936 helo=mail-pf1-x429.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nH2GU-0001jX-8q for qemu-devel@nongnu.org; Mon, 07 Feb 2022 06:33:04 -0500 Received: by mail-pf1-x429.google.com with SMTP id i30so12411555pfk.8 for ; Mon, 07 Feb 2022 03:32:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=anisinha-ca.20210112.gappssmtp.com; s=20210112; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=E5a2PaNgKhv45jsrP8yD2Hyxn0fHtaTtQrLqDp2u41E=; b=7w0bCgugVbhgKJ0Lx34MhM13q7pPOqsWmXWZv0Lts0JwUwtbY4gy36ChmkRzK2zkSc 4/S8cl2Mel5O99tcx7Ag2bF5wu15FbBCxwzsFeUBBybGdW+dVi1WXjjq17ZABw91eS+J to+tb15VIrwQUaBxEH401JP/qg66EToEi1trGPE6flLWQJKyviWScNwzDHDRJKMWr8uf pdm7ro9GVbKBjDTNlpWXCc64QN8RiMrepUI1BoWJU2d4dbEVUF5NeBzw0YDKWthUDlhF w9p3XZv0cGBpbh+beZSPdkkWj8C+FZ+XvWDKGALLPlN6zPo74J+JS48Cn0Kskbdf5jC/ o0Og== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=E5a2PaNgKhv45jsrP8yD2Hyxn0fHtaTtQrLqDp2u41E=; b=h0w0amEZMX54rXt1/gBnqXELMn8KdQNoNcYhYXF5G4mqf5oxm85kjDfpI89e1XJBBV qFBZBK4D32H7FgLTooHeyRXyUXYEfqotUskzjrHtXQlmsWqGkBfH9SGLyIi/j+W+mLu0 AvKPtpTxgSBSJiYYaGUPVtdAztIj66myylv04ZG2dgNovlsp5++2fcYXp2ZpbgAV6lai gYD9zBbfV+0IpUxjI8RQdflTwUBNiWaUKGXZoQAQBNtWH+d0t2VJG5sQC3ZiqiWeVPTa VRiKj4bUV0jFoB04Xp54mhaJb9PdFWvOIwD9HIfPG5SiWQCbjRpzaa5M9rTjCbiOzqPD Uv1A== X-Gm-Message-State: AOAM530egsI220lpMkiJ/pZ4y8Qcy115BKYRcp4K6aQtwYocKl5cHVmo RTS66enmdIQgTBgU+6kG0ZIMr/b+9r3NuJcn33FEag== X-Google-Smtp-Source: ABdhPJyFS4/04JfXz+LunNFAdgKLkckcTnQmSwARYq6YGEHAw7O28nIdf3+EJR0EfJrGxaww3lrPhA== X-Received: by 2002:a63:4182:: with SMTP id o124mr8973343pga.479.1644233577715; Mon, 07 Feb 2022 03:32:57 -0800 (PST) Received: from anisinha-lenovo.ba.nuagenetworks.net ([203.212.242.56]) by smtp.googlemail.com with ESMTPSA id h14sm13016345pfh.95.2022.02.07.03.32.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Feb 2022 03:32:57 -0800 (PST) From: Ani Sinha To: qemu-devel@nongnu.org, "Michael S. Tsirkin" , Igor Mammedov , Ani Sinha Subject: [PATCH v2 3/3] hw/smbios: add an assertion to ensure tables 19 and 32 do not collide Date: Mon, 7 Feb 2022 17:01:29 +0530 Message-Id: <20220207113129.2701722-4-ani@anisinha.ca> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220207113129.2701722-1-ani@anisinha.ca> References: <20220207113129.2701722-1-ani@anisinha.ca> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::429 (failed) Received-SPF: none client-ip=2607:f8b0:4864:20::429; envelope-from=ani@anisinha.ca; helo=mail-pf1-x429.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Since change b3cddba9c14b034 ("hw/smbios: fix table memory corruption with large memory vms") we reserve additional memory space between tables 17 and 19 for large VMs. This may cause table 19 to collide with table 32 for those VMs. This change adds an assertion to make sure table 19 does not extend into the memory used by table 32. Signed-off-by: Ani Sinha --- hw/smbios/smbios.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c index d7de740363..800a35e9a5 100644 --- a/hw/smbios/smbios.c +++ b/hw/smbios/smbios.c @@ -1048,6 +1048,9 @@ void smbios_get_tables(MachineState *ms, mem_array[i].length); } + /* we need to make sure table 19 and table 32 do not overlap */ + assert((mem_array_size + offset) < (T32_BASE - T19_BASE)); + smbios_build_type_32_table(); smbios_build_type_38_table(); smbios_build_type_41_table(errp);