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GET /api/1.1/patches/2230213/?format=api
{ "id": 2230213, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230213/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429122845.2119072-1-physicalmtea@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260429122845.2119072-1-physicalmtea@gmail.com>", "date": "2026-04-29T12:28:45", "name": "hw/cxl: bound remaining Set Feature writes", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "26db89b06e7ab61e35c21e3fdd438c8932934047", "submitter": { "id": 93269, "url": "http://patchwork.ozlabs.org/api/1.1/people/93269/?format=api", "name": "Jia Jia", "email": "physicalmtea@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429122845.2119072-1-physicalmtea@gmail.com/mbox/", "series": [ { "id": 502053, "url": "http://patchwork.ozlabs.org/api/1.1/series/502053/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502053", "date": "2026-04-29T12:28:45", "name": "hw/cxl: bound remaining Set Feature writes", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502053/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230213/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230213/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=c0empiY/;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g5H9q3PsDz1yHZ\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 29 Apr 2026 22:46:37 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wI4Ib-0003tU-GI; Wed, 29 Apr 2026 08:45:54 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <physicalmtea@gmail.com>)\n id 1wI42C-0000We-CN\n for qemu-devel@nongnu.org; Wed, 29 Apr 2026 08:28:56 -0400", "from mail-pl1-x632.google.com ([2607:f8b0:4864:20::632])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from <physicalmtea@gmail.com>)\n id 1wI42A-00044O-84\n for qemu-devel@nongnu.org; Wed, 29 Apr 2026 08:28:56 -0400", "by mail-pl1-x632.google.com with SMTP id\n d9443c01a7336-2b7adb38d65so61685855ad.2\n for <qemu-devel@nongnu.org>; Wed, 29 Apr 2026 05:28:53 -0700 (PDT)", "from jia.. 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With an ASan build\nthis aborts the host process with:\n\n ERROR: AddressSanitizer: heap-buffer-overflow\n WRITE of size 2016\n #0 __interceptor_memcpy\n #1 cmd_features_set_feature ../hw/cxl/cxl-mailbox-utils.c:1908\n #2 cxl_process_cci_message ../hw/cxl/cxl-mailbox-utils.c:4622\n #3 mailbox_reg_write ../hw/cxl/cxl-device-utils.c:209\n\nApply the same offset + length validation to soft_ppr,\nhard_ppr, cacheline_sparing, row_sparing, bank_sparing, and\nrank_sparing so oversized requests fail with\nCXL_MBOX_INVALID_PAYLOAD_LENGTH instead of overflowing the\nwrite-attribute buffers.\n\nAdd a qtest covering the rank_sparing path.\n\nResolves: https://gitlab.com/qemu-project/qemu/-/work_items/3458\nSigned-off-by: Jia Jia <physicalmtea@gmail.com>\n---\n hw/cxl/cxl-mailbox-utils.c | 20 ++++++++\n tests/qtest/cxl-test.c | 99 ++++++++++++++++++++++++++++++++++++++\n 2 files changed, 119 insertions(+)", "diff": "diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c\nindex d8ba7e8625..ce139e30eb 100644\n--- a/hw/cxl/cxl-mailbox-utils.c\n+++ b/hw/cxl/cxl-mailbox-utils.c\n@@ -1713,6 +1713,7 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,\n CXLSetFeatureInHeader *hdr = (void *)payload_in;\n CXLSetFeatureInfo *set_feat_info;\n uint16_t bytes_to_copy = 0;\n+ uint32_t end_offset;\n uint8_t data_transfer_flag;\n CXLType3Dev *ct3d;\n uint16_t count;\n@@ -1746,6 +1747,7 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,\n set_feat_info->data_transfer_flag = data_transfer_flag;\n set_feat_info->data_offset = hdr->offset;\n bytes_to_copy = len_in - sizeof(CXLSetFeatureInHeader);\n+ end_offset = (uint32_t)hdr->offset + bytes_to_copy;\n \n if (bytes_to_copy == 0) {\n return CXL_MBOX_INVALID_PAYLOAD_LENGTH;\n@@ -1813,6 +1815,9 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,\n return CXL_MBOX_UNSUPPORTED;\n }\n \n+ if (end_offset > sizeof(ct3d->soft_ppr_wr_attrs)) {\n+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;\n+ }\n memcpy((uint8_t *)&ct3d->soft_ppr_wr_attrs + hdr->offset,\n sppr_write_attrs, bytes_to_copy);\n set_feat_info->data_size += bytes_to_copy;\n@@ -1832,6 +1837,9 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,\n return CXL_MBOX_UNSUPPORTED;\n }\n \n+ if (end_offset > sizeof(ct3d->hard_ppr_wr_attrs)) {\n+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;\n+ }\n memcpy((uint8_t *)&ct3d->hard_ppr_wr_attrs + hdr->offset,\n hppr_write_attrs, bytes_to_copy);\n set_feat_info->data_size += bytes_to_copy;\n@@ -1851,6 +1859,9 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,\n return CXL_MBOX_UNSUPPORTED;\n }\n \n+ if (end_offset > sizeof(ct3d->cacheline_sparing_wr_attrs)) {\n+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;\n+ }\n memcpy((uint8_t *)&ct3d->cacheline_sparing_wr_attrs + hdr->offset,\n mem_sparing_write_attrs, bytes_to_copy);\n set_feat_info->data_size += bytes_to_copy;\n@@ -1869,6 +1880,9 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,\n return CXL_MBOX_UNSUPPORTED;\n }\n \n+ if (end_offset > sizeof(ct3d->row_sparing_wr_attrs)) {\n+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;\n+ }\n memcpy((uint8_t *)&ct3d->row_sparing_wr_attrs + hdr->offset,\n mem_sparing_write_attrs, bytes_to_copy);\n set_feat_info->data_size += bytes_to_copy;\n@@ -1887,6 +1901,9 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,\n return CXL_MBOX_UNSUPPORTED;\n }\n \n+ if (end_offset > sizeof(ct3d->bank_sparing_wr_attrs)) {\n+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;\n+ }\n memcpy((uint8_t *)&ct3d->bank_sparing_wr_attrs + hdr->offset,\n mem_sparing_write_attrs, bytes_to_copy);\n set_feat_info->data_size += bytes_to_copy;\n@@ -1905,6 +1922,9 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,\n return CXL_MBOX_UNSUPPORTED;\n }\n \n+ if (end_offset > sizeof(ct3d->rank_sparing_wr_attrs)) {\n+ return CXL_MBOX_INVALID_PAYLOAD_LENGTH;\n+ }\n memcpy((uint8_t *)&ct3d->rank_sparing_wr_attrs + hdr->offset,\n mem_sparing_write_attrs, bytes_to_copy);\n set_feat_info->data_size += bytes_to_copy;\ndiff --git a/tests/qtest/cxl-test.c b/tests/qtest/cxl-test.c\nindex 8fb7e58d4f..a9fcd98736 100644\n--- a/tests/qtest/cxl-test.c\n+++ b/tests/qtest/cxl-test.c\n@@ -7,6 +7,7 @@\n \n #include \"qemu/osdep.h\"\n #include \"libqtest-single.h\"\n+#include \"hw/cxl/cxl_device.h\"\n \n #define QEMU_PXB_CMD \\\n \"-machine q35,cxl=on \" \\\n@@ -59,6 +60,12 @@\n \"-object memory-backend-file,id=lsa0,mem-path=%s,size=256M \" \\\n \"-device cxl-type3,bus=rp0,volatile-memdev=cxl-mem0,lsa=lsa0,id=mem0 \"\n \n+#define QEMU_T3D_DIRECT_PMEM \\\n+ \"-machine q35,cxl=on -nodefaults \" \\\n+ \"-object memory-backend-file,id=cxl-mem0,mem-path=%s,size=256M \" \\\n+ \"-object memory-backend-file,id=lsa0,mem-path=%s,size=1M \" \\\n+ \"-device cxl-type3,bus=pcie.0,persistent-memdev=cxl-mem0,lsa=lsa0,id=pmem0 \"\n+\n #define QEMU_2T3D \\\n \"-object memory-backend-file,id=cxl-mem0,mem-path=%s,size=256M \" \\\n \"-object memory-backend-file,id=lsa0,mem-path=%s,size=256M \" \\\n@@ -81,6 +88,17 @@\n \"-object memory-backend-file,id=lsa3,mem-path=%s,size=256M \" \\\n \"-device cxl-type3,bus=rp3,persistent-memdev=cxl-mem3,lsa=lsa3,id=pmem3 \"\n \n+#define CXL_T3D_DEVFN 0x08\n+#define CXL_T3D_BAR2_ADDR 0x10000000ULL\n+\n+typedef struct QEMU_PACKED CXLSetFeatureInHeaderTest {\n+ uint8_t uuid[16];\n+ uint32_t flags;\n+ uint16_t offset;\n+ uint8_t version;\n+ uint8_t rsvd[9];\n+} CXLSetFeatureInHeaderTest;\n+\n static void cxl_basic_hb(void)\n {\n qtest_start(\"-machine q35,cxl=on\");\n@@ -118,6 +136,85 @@ static void cxl_2root_port(void)\n }\n \n #ifdef CONFIG_POSIX\n+static uint32_t cxl_test_pci_config_addr(uint8_t devfn, uint8_t offset)\n+{\n+ return 0x80000000U | (devfn << 8) | offset;\n+}\n+\n+static void cxl_test_t3d_enable_bar2(void)\n+{\n+ outl(0xcf8, cxl_test_pci_config_addr(CXL_T3D_DEVFN, 0x18));\n+ outl(0xcfc, CXL_T3D_BAR2_ADDR);\n+ outl(0xcf8, cxl_test_pci_config_addr(CXL_T3D_DEVFN, 0x1c));\n+ outl(0xcfc, 0);\n+ outl(0xcf8, cxl_test_pci_config_addr(CXL_T3D_DEVFN, 0x04));\n+ outl(0xcfc, 0x2);\n+}\n+\n+static uint64_t cxl_test_t3d_mailbox_base(void)\n+{\n+ return CXL_T3D_BAR2_ADDR + CXL_MAILBOX_REGISTERS_OFFSET;\n+}\n+\n+static uint64_t cxl_test_t3d_payload_base(void)\n+{\n+ return cxl_test_t3d_mailbox_base() + A_CXL_DEV_CMD_PAYLOAD;\n+}\n+\n+static void cxl_test_t3d_submit_set_feature(const void *payload, size_t len)\n+{\n+ memwrite(cxl_test_t3d_payload_base(), payload, len);\n+ writeq(cxl_test_t3d_mailbox_base() + A_CXL_DEV_MAILBOX_CMD,\n+ ((uint64_t)len << 16) | (0x05 << 8) | 0x02);\n+ writel(cxl_test_t3d_mailbox_base() + A_CXL_DEV_MAILBOX_CTRL, 1);\n+}\n+\n+static uint16_t cxl_test_t3d_mailbox_errno(void)\n+{\n+ return (readq(cxl_test_t3d_mailbox_base() + A_CXL_DEV_MAILBOX_STS) >>\n+ 32) & 0xffff;\n+}\n+\n+static void cxl_test_fill_set_feature_header(CXLSetFeatureInHeaderTest *hdr,\n+ const uint8_t uuid[16],\n+ uint16_t offset,\n+ uint8_t version)\n+{\n+ memset(hdr, 0, sizeof(*hdr));\n+ memcpy(hdr->uuid, uuid, 16);\n+ hdr->offset = cpu_to_le16(offset);\n+ hdr->version = version;\n+}\n+\n+static void cxl_t3d_set_feature_rejects_oversized_rank_sparing(void)\n+{\n+ static const uint8_t rank_sparing_uuid[16] = {\n+ 0x34, 0xdb, 0xaf, 0xf5, 0x05, 0x52, 0x42, 0x81,\n+ 0x8f, 0x76, 0xda, 0x0b, 0x5e, 0x7a, 0x76, 0xa7,\n+ };\n+ g_autoptr(GString) cmdline = g_string_new(NULL);\n+ g_autofree const char *tmpfs = NULL;\n+ uint8_t payload[CXL_MAILBOX_MAX_PAYLOAD_SIZE] = { 0 };\n+ CXLSetFeatureInHeaderTest *hdr = (void *)payload;\n+\n+ tmpfs = g_dir_make_tmp(\"cxl-test-XXXXXX\", NULL);\n+ g_string_printf(cmdline, QEMU_T3D_DIRECT_PMEM, tmpfs, tmpfs);\n+\n+ qtest_start(cmdline->str);\n+ cxl_test_t3d_enable_bar2();\n+\n+ cxl_test_fill_set_feature_header(hdr, rank_sparing_uuid, 0,\n+ CXL_MEMDEV_SPARING_SET_FEATURE_VERSION);\n+ memset(payload + sizeof(*hdr), 0x41,\n+ sizeof(payload) - sizeof(*hdr));\n+ cxl_test_t3d_submit_set_feature(payload, sizeof(payload));\n+ g_assert_cmphex(cxl_test_t3d_mailbox_errno(), ==,\n+ CXL_MBOX_INVALID_PAYLOAD_LENGTH);\n+\n+ qtest_end();\n+ rmdir(tmpfs);\n+}\n+\n static void cxl_t3d_deprecated(void)\n {\n g_autoptr(GString) cmdline = g_string_new(NULL);\n@@ -238,6 +335,8 @@ int main(int argc, char **argv)\n qtest_add_func(\"/pci/cxl/type3_device_pmem\", cxl_t3d_persistent);\n qtest_add_func(\"/pci/cxl/type3_device_vmem\", cxl_t3d_volatile);\n qtest_add_func(\"/pci/cxl/type3_device_vmem_lsa\", cxl_t3d_volatile_lsa);\n+ qtest_add_func(\"/pci/cxl/type3_device_set_feature_rank_sparing_bounds\",\n+ cxl_t3d_set_feature_rejects_oversized_rank_sparing);\n qtest_add_func(\"/pci/cxl/rp_x2_type3_x2\", cxl_1pxb_2rp_2t3d);\n qtest_add_func(\"/pci/cxl/pxb_x2_root_port_x4_type3_x4\",\n cxl_2pxb_4rp_4t3d);\n", "prefixes": [] }