{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2022-48731", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-20T11:09:39.053Z", "datePublished": "2024-06-20T11:13:19.407Z", "dateUpdated": "2024-08-03T15:25:01.574Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-06-20T11:14:20.662Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/kmemleak: avoid scanning potential huge holes\n\nWhen using devm_request_free_mem_region() and devm_memremap_pages() to\nadd ZONE_DEVICE memory, if requested free mem region's end pfn were\nhuge(e.g., 0x400000000), the node_end_pfn() will be also huge (see\nmove_pfn_range_to_zone()). Thus it creates a huge hole between\nnode_start_pfn() and node_end_pfn().\n\nWe found on some AMD APUs, amdkfd requested such a free mem region and\ncreated a huge hole. In such a case, following code snippet was just\ndoing busy test_bit() looping on the huge hole.\n\n for (pfn = start_pfn; pfn < end_pfn; pfn++) {\n\tstruct page *page = pfn_to_online_page(pfn);\n\t\tif (!page)\n\t\t\tcontinue;\n\t...\n }\n\nSo we got a soft lockup:\n\n watchdog: BUG: soft lockup - CPU#6 stuck for 26s! [bash:1221]\n CPU: 6 PID: 1221 Comm: bash Not tainted 5.15.0-custom #1\n RIP: 0010:pfn_to_online_page+0x5/0xd0\n Call Trace:\n ? kmemleak_scan+0x16a/0x440\n kmemleak_write+0x306/0x3a0\n ? common_file_perm+0x72/0x170\n full_proxy_write+0x5c/0x90\n vfs_write+0xb9/0x260\n ksys_write+0x67/0xe0\n __x64_sys_write+0x1a/0x20\n do_syscall_64+0x3b/0xc0\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nI did some tests with the patch.\n\n(1) amdgpu module unloaded\n\nbefore the patch:\n\n real 0m0.976s\n user 0m0.000s\n sys 0m0.968s\n\nafter the patch:\n\n real 0m0.981s\n user 0m0.000s\n sys 0m0.973s\n\n(2) amdgpu module loaded\n\nbefore the patch:\n\n real 0m35.365s\n user 0m0.000s\n sys 0m35.354s\n\nafter the patch:\n\n real 0m1.049s\n user 0m0.000s\n sys 0m1.042s" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "mm/kmemleak.c" ], "versions": [ { "version": "1da177e4c3f4", "lessThan": "d3533ee20e9a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "352715593e81", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "a5389c80992f", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "cebb0aceb21a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "c10a0f877fe0", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "mm/kmemleak.c" ], "versions": [ { "version": "5.4.178", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.99", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.22", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.16.8", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d3533ee20e9a0e2e8f60384da7450d43d1c63d1a" }, { "url": "https://git.kernel.org/stable/c/352715593e81b917ce1b321e794549815b850134" }, { "url": "https://git.kernel.org/stable/c/a5389c80992f0001ee505838fe6a8b20897ce96e" }, { "url": "https://git.kernel.org/stable/c/cebb0aceb21ad91429617a40e3a17444fabf1529" }, { "url": "https://git.kernel.org/stable/c/c10a0f877fe007021d70f9cada240f42adc2b5db" } ], "title": "mm/kmemleak: avoid scanning potential huge holes", "x_generator": { "engine": "bippy-7d53e8ef8be4" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-20T13:35:34.134503Z", "id": "CVE-2022-48731", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-20T13:35:41.308Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:25:01.574Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/d3533ee20e9a0e2e8f60384da7450d43d1c63d1a", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/352715593e81b917ce1b321e794549815b850134", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a5389c80992f0001ee505838fe6a8b20897ce96e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/cebb0aceb21ad91429617a40e3a17444fabf1529", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/c10a0f877fe007021d70f9cada240f42adc2b5db", "tags": [ "x_transferred" ] } ] } ] } }