CVE-2024-39301 (GCVE-0-2024-39301)

Vulnerability from cvelistv5 – Published: 2024-06-25 14:22 – Updated: 2026-05-11 20:20
VLAI?
Title
net/9p: fix uninit-value in p9_client_rpc()
Summary
In the Linux kernel, the following vulnerability has been resolved: net/9p: fix uninit-value in p9_client_rpc() Syzbot with the help of KMSAN reported the following error: BUG: KMSAN: uninit-value in trace_9p_client_res include/trace/events/9p.h:146 [inline] BUG: KMSAN: uninit-value in p9_client_rpc+0x1314/0x1340 net/9p/client.c:754 trace_9p_client_res include/trace/events/9p.h:146 [inline] p9_client_rpc+0x1314/0x1340 net/9p/client.c:754 p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031 v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410 v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122 legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1797 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit was created at: __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0x2de/0x1400 mm/slub.c:2391 ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852 p9_tag_alloc net/9p/client.c:278 [inline] p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641 p9_client_rpc+0x27e/0x1340 net/9p/client.c:688 p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031 v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410 v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122 legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1797 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 If p9_check_errors() fails early in p9_client_rpc(), req->rc.tag will not be properly initialized. However, trace_9p_client_res() ends up trying to print it out anyway before p9_client_rpc() finishes. Fix this issue by assigning default values to p9_fcall fields such as 'tag' and (just in case KMSAN unearths something new) 'id' during the tag allocation stage.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 348b59012e5c6402741d067cf6eeeb6271999d06 , < 72c5d8e416ecc46af370a1340b3db5ff0b0cc867 (git)
Affected: 348b59012e5c6402741d067cf6eeeb6271999d06 , < 2101901dd58c6da4924bc5efb217a1d83436290b (git)
Affected: 348b59012e5c6402741d067cf6eeeb6271999d06 , < 124947855564572713d705a13be7d0c9dae16a17 (git)
Affected: 348b59012e5c6402741d067cf6eeeb6271999d06 , < 89969ffbeb948ffc159d19252e7469490103011b (git)
Affected: 348b59012e5c6402741d067cf6eeeb6271999d06 , < ca71f204711ad24113e8b344dc5bb8b0385f5672 (git)
Affected: 348b59012e5c6402741d067cf6eeeb6271999d06 , < 6c1791130b781c843572fb6391c4a4c5d857ab17 (git)
Affected: 348b59012e5c6402741d067cf6eeeb6271999d06 , < fe5c604053c36c62af24eee8a76407d026ea5163 (git)
Affected: 348b59012e5c6402741d067cf6eeeb6271999d06 , < 25460d6f39024cc3b8241b14c7ccf0d6f11a736a (git)
Create a notification for this product.
Linux Linux Affected: 3.2
Unaffected: 0 , < 3.2 (semver)
Unaffected: 4.19.316 , ≤ 4.19.* (semver)
Unaffected: 5.4.278 , ≤ 5.4.* (semver)
Unaffected: 5.10.219 , ≤ 5.10.* (semver)
Unaffected: 5.15.161 , ≤ 5.15.* (semver)
Unaffected: 6.1.94 , ≤ 6.1.* (semver)
Unaffected: 6.6.34 , ≤ 6.6.* (semver)
Unaffected: 6.9.5 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/9p: fix uninit-value in p9_client_rpc()\n\nSyzbot with the help of KMSAN reported the following error:\n\nBUG: KMSAN: uninit-value in trace_9p_client_res include/trace/events/9p.h:146 [inline]\nBUG: KMSAN: uninit-value in p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\n trace_9p_client_res include/trace/events/9p.h:146 [inline]\n p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\n path_mount+0x742/0x1f20 fs/namespace.c:3679\n do_mount fs/namespace.c:3692 [inline]\n __do_sys_mount fs/namespace.c:3898 [inline]\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nUninit was created at:\n __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598\n __alloc_pages_node include/linux/gfp.h:238 [inline]\n alloc_pages_node include/linux/gfp.h:261 [inline]\n alloc_slab_page mm/slub.c:2175 [inline]\n allocate_slab mm/slub.c:2338 [inline]\n new_slab+0x2de/0x1400 mm/slub.c:2391\n ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525\n __slab_alloc mm/slub.c:3610 [inline]\n __slab_alloc_node mm/slub.c:3663 [inline]\n slab_alloc_node mm/slub.c:3835 [inline]\n kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852\n p9_tag_alloc net/9p/client.c:278 [inline]\n p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641\n p9_client_rpc+0x27e/0x1340 net/9p/client.c:688\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\n path_mount+0x742/0x1f20 fs/namespace.c:3679\n do_mount fs/namespace.c:3692 [inline]\n __do_sys_mount fs/namespace.c:3898 [inline]\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\n do_syscall_64+0xd5/0x1f0\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nIf p9_check_errors() fails early in p9_client_rpc(), req-\u003erc.tag\nwill not be properly initialized. However, trace_9p_client_res()\nends up trying to print it out anyway before p9_client_rpc()\nfinishes.\n\nFix this issue by assigning default values to p9_fcall fields\nsuch as \u0027tag\u0027 and (just in case KMSAN unearths something new) \u0027id\u0027\nduring the tag allocation stage."
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/9p: fix uninit-value in p9_client_rpc()\\n\\nSyzbot with the help of KMSAN reported the following error:\\n\\nBUG: KMSAN: uninit-value in trace_9p_client_res include/trace/events/9p.h:146 [inline]\\nBUG: KMSAN: uninit-value in p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\\n trace_9p_client_res include/trace/events/9p.h:146 [inline]\\n p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\\n path_mount+0x742/0x1f20 fs/namespace.c:3679\\n do_mount fs/namespace.c:3692 [inline]\\n __do_sys_mount fs/namespace.c:3898 [inline]\\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\\n do_syscall_64+0xd5/0x1f0\\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\\n\\nUninit was created at:\\n __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598\\n __alloc_pages_node include/linux/gfp.h:238 [inline]\\n alloc_pages_node include/linux/gfp.h:261 [inline]\\n alloc_slab_page mm/slub.c:2175 [inline]\\n allocate_slab mm/slub.c:2338 [inline]\\n new_slab+0x2de/0x1400 mm/slub.c:2391\\n ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525\\n __slab_alloc mm/slub.c:3610 [inline]\\n __slab_alloc_node mm/slub.c:3663 [inline]\\n slab_alloc_node mm/slub.c:3835 [inline]\\n kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852\\n p9_tag_alloc net/9p/client.c:278 [inline]\\n p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641\\n p9_client_rpc+0x27e/0x1340 net/9p/client.c:688\\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\\n path_mount+0x742/0x1f20 fs/namespace.c:3679\\n do_mount fs/namespace.c:3692 [inline]\\n __do_sys_mount fs/namespace.c:3898 [inline]\\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\\n do_syscall_64+0xd5/0x1f0\\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\\n\\nIf p9_check_errors() fails early in p9_client_rpc(), req-\u003erc.tag\\nwill not be properly initialized. However, trace_9p_client_res()\\nends up trying to print it out anyway before p9_client_rpc()\\nfinishes.\\n\\nFix this issue by assigning default values to p9_fcall fields\\nsuch as \u0027tag\u0027 and (just in case KMSAN unearths something new) \u0027id\u0027\\nduring the tag allocation stage.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: net/9p: corrige el valor uninit en p9_client_rpc() Syzbot con la ayuda de KMSAN inform\\u00f3 el siguiente error: ERROR: KMSAN: valor uninit en trace_9p_client_res include/trace/events/ 9p.h:146 [en l\\u00ednea] ERROR: KMSAN: valor uninit en p9_client_rpc+0x1314/0x1340 net/9p/client.c:754 trace_9p_client_res include/trace/events/9p.h:146 [en l\\u00ednea] p9_client_rpc+0x1314/0x1340 net/9p/client.c:754 p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031 v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410 v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c: 122 Legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1797 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 montar fs/namespace.c:3692 [en l\\u00ednea] __do_sys_mount fs/namespace.c:3898 [en l\\u00ednea] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 do_syscall_64+0xd5/ 0x1f0 Entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit se cre\\u00f3 en: __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598 __alloc_pages_node include/linux/gfp.h:238 [en l\\u00ednea] alloc_pages_node include/linux/gfp.h:261 [en l\\u00ednea] p\\u00e1gina mm /slub.c:2175 [en l\\u00ednea] allocate_slab mm/slub.c:2338 [en l\\u00ednea] new_slab+0x2de/0x1400 mm/slub.c:2391 ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525 __slab_alloc mm/slub.c :3610 [en l\\u00ednea] __slab_alloc_node mm/slub.c:3663 [en l\\u00ednea] slab_alloc_node mm/slub.c:3835 [en l\\u00ednea] kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852 p9_tag_alloc net/9p/client.c:278 [ en l\\u00ednea] p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641 p9_client_rpc+0x27e/0x1340 net/9p/client.c:688 p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031 1b9/0x28e0fs /9p/v9fs.c:410 v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122 Legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1797 do_new_mount+0x71f/ 0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [en l\\u00ednea] __do_sys_mount fs/namespace.c:3898 [en l\\u00ednea] __se_sys_mount+0x725/0x810 fs/namespace .c: 3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c: 3875 do_syscall_64+0xd5/0x1f0 entry_syscall_64_after_hwframe+0x6d/0x75 if p9_check_errors () fails en p9_client no se inicialice correctamente. Sin embargo, trace_9p_client_res() termina intentando imprimirlo de todos modos antes de que finalice p9_client_rpc(). Solucione este problema asignando valores predeterminados a los campos p9_fcall como \u0027etiqueta\u0027 y (en caso de que KMSAN descubra algo nuevo) \u0027id\u0027 durante la etapa de asignaci\\u00f3n de etiquetas.\"}]",
      "id": "CVE-2024-39301",
      "lastModified": "2024-11-21T09:27:25.003",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-06-25T15:15:14.240",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/124947855564572713d705a13be7d0c9dae16a17\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/2101901dd58c6da4924bc5efb217a1d83436290b\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/25460d6f39024cc3b8241b14c7ccf0d6f11a736a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/6c1791130b781c843572fb6391c4a4c5d857ab17\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/72c5d8e416ecc46af370a1340b3db5ff0b0cc867\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/89969ffbeb948ffc159d19252e7469490103011b\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/ca71f204711ad24113e8b344dc5bb8b0385f5672\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/fe5c604053c36c62af24eee8a76407d026ea5163\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/124947855564572713d705a13be7d0c9dae16a17\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/2101901dd58c6da4924bc5efb217a1d83436290b\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/25460d6f39024cc3b8241b14c7ccf0d6f11a736a\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/6c1791130b781c843572fb6391c4a4c5d857ab17\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/72c5d8e416ecc46af370a1340b3db5ff0b0cc867\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/89969ffbeb948ffc159d19252e7469490103011b\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/ca71f204711ad24113e8b344dc5bb8b0385f5672\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/fe5c604053c36c62af24eee8a76407d026ea5163\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-665\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-39301\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-25T15:15:14.240\",\"lastModified\":\"2024-11-21T09:27:25.003\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/9p: fix uninit-value in p9_client_rpc()\\n\\nSyzbot with the help of KMSAN reported the following error:\\n\\nBUG: KMSAN: uninit-value in trace_9p_client_res include/trace/events/9p.h:146 [inline]\\nBUG: KMSAN: uninit-value in p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\\n trace_9p_client_res include/trace/events/9p.h:146 [inline]\\n p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\\n path_mount+0x742/0x1f20 fs/namespace.c:3679\\n do_mount fs/namespace.c:3692 [inline]\\n __do_sys_mount fs/namespace.c:3898 [inline]\\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\\n do_syscall_64+0xd5/0x1f0\\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\\n\\nUninit was created at:\\n __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598\\n __alloc_pages_node include/linux/gfp.h:238 [inline]\\n alloc_pages_node include/linux/gfp.h:261 [inline]\\n alloc_slab_page mm/slub.c:2175 [inline]\\n allocate_slab mm/slub.c:2338 [inline]\\n new_slab+0x2de/0x1400 mm/slub.c:2391\\n ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525\\n __slab_alloc mm/slub.c:3610 [inline]\\n __slab_alloc_node mm/slub.c:3663 [inline]\\n slab_alloc_node mm/slub.c:3835 [inline]\\n kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852\\n p9_tag_alloc net/9p/client.c:278 [inline]\\n p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641\\n p9_client_rpc+0x27e/0x1340 net/9p/client.c:688\\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\\n path_mount+0x742/0x1f20 fs/namespace.c:3679\\n do_mount fs/namespace.c:3692 [inline]\\n __do_sys_mount fs/namespace.c:3898 [inline]\\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\\n do_syscall_64+0xd5/0x1f0\\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\\n\\nIf p9_check_errors() fails early in p9_client_rpc(), req-\u003erc.tag\\nwill not be properly initialized. However, trace_9p_client_res()\\nends up trying to print it out anyway before p9_client_rpc()\\nfinishes.\\n\\nFix this issue by assigning default values to p9_fcall fields\\nsuch as \u0027tag\u0027 and (just in case KMSAN unearths something new) \u0027id\u0027\\nduring the tag allocation stage.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/9p: corrige el valor uninit en p9_client_rpc() Syzbot con la ayuda de KMSAN inform\u00f3 el siguiente error: ERROR: KMSAN: valor uninit en trace_9p_client_res include/trace/events/ 9p.h:146 [en l\u00ednea] ERROR: KMSAN: valor uninit en p9_client_rpc+0x1314/0x1340 net/9p/client.c:754 trace_9p_client_res include/trace/events/9p.h:146 [en l\u00ednea] p9_client_rpc+0x1314/0x1340 net/9p/client.c:754 p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031 v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410 v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c: 122 Legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1797 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 montar fs/namespace.c:3692 [en l\u00ednea] __do_sys_mount fs/namespace.c:3898 [en l\u00ednea] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 do_syscall_64+0xd5/ 0x1f0 Entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit se cre\u00f3 en: __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598 __alloc_pages_node include/linux/gfp.h:238 [en l\u00ednea] alloc_pages_node include/linux/gfp.h:261 [en l\u00ednea] p\u00e1gina mm /slub.c:2175 [en l\u00ednea] allocate_slab mm/slub.c:2338 [en l\u00ednea] new_slab+0x2de/0x1400 mm/slub.c:2391 ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525 __slab_alloc mm/slub.c :3610 [en l\u00ednea] __slab_alloc_node mm/slub.c:3663 [en l\u00ednea] slab_alloc_node mm/slub.c:3835 [en l\u00ednea] kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852 p9_tag_alloc net/9p/client.c:278 [ en l\u00ednea] p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641 p9_client_rpc+0x27e/0x1340 net/9p/client.c:688 p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031 1b9/0x28e0fs /9p/v9fs.c:410 v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122 Legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1797 do_new_mount+0x71f/ 0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [en l\u00ednea] __do_sys_mount fs/namespace.c:3898 [en l\u00ednea] __se_sys_mount+0x725/0x810 fs/namespace .c: 3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c: 3875 do_syscall_64+0xd5/0x1f0 entry_syscall_64_after_hwframe+0x6d/0x75 if p9_check_errors () fails en p9_client no se inicialice correctamente. Sin embargo, trace_9p_client_res() termina intentando imprimirlo de todos modos antes de que finalice p9_client_rpc(). Solucione este problema asignando valores predeterminados a los campos p9_fcall como \u0027etiqueta\u0027 y (en caso de que KMSAN descubra algo nuevo) \u0027id\u0027 durante la etapa de asignaci\u00f3n de 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    "vulnrichment": {
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trace_9p_client_res include/trace/events/9p.h:146 [inline]\\n p9_client_rpc+0x1314/0x1340 net/9p/client.c:754\\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\\n path_mount+0x742/0x1f20 fs/namespace.c:3679\\n do_mount fs/namespace.c:3692 [inline]\\n __do_sys_mount fs/namespace.c:3898 [inline]\\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\\n do_syscall_64+0xd5/0x1f0\\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\\n\\nUninit was created at:\\n __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598\\n __alloc_pages_node include/linux/gfp.h:238 [inline]\\n alloc_pages_node include/linux/gfp.h:261 [inline]\\n alloc_slab_page mm/slub.c:2175 [inline]\\n allocate_slab mm/slub.c:2338 [inline]\\n new_slab+0x2de/0x1400 mm/slub.c:2391\\n ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525\\n __slab_alloc mm/slub.c:3610 [inline]\\n __slab_alloc_node mm/slub.c:3663 [inline]\\n slab_alloc_node mm/slub.c:3835 [inline]\\n kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852\\n p9_tag_alloc net/9p/client.c:278 [inline]\\n p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641\\n p9_client_rpc+0x27e/0x1340 net/9p/client.c:688\\n p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031\\n v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410\\n v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122\\n legacy_get_tree+0x114/0x290 fs/fs_context.c:662\\n vfs_get_tree+0xa7/0x570 fs/super.c:1797\\n do_new_mount+0x71f/0x15e0 fs/namespace.c:3352\\n path_mount+0x742/0x1f20 fs/namespace.c:3679\\n do_mount fs/namespace.c:3692 [inline]\\n __do_sys_mount fs/namespace.c:3898 [inline]\\n __se_sys_mount+0x725/0x810 fs/namespace.c:3875\\n __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875\\n do_syscall_64+0xd5/0x1f0\\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\\n\\nIf p9_check_errors() fails early in p9_client_rpc(), req-\u003erc.tag\\nwill not be properly initialized. However, trace_9p_client_res()\\nends up trying to print it out anyway before p9_client_rpc()\\nfinishes.\\n\\nFix this issue by assigning default values to p9_fcall fields\\nsuch as \u0027tag\u0027 and (just in case KMSAN unearths something new) \u0027id\u0027\\nduring the tag allocation stage.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:06:33.888Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-39301\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:06:33.888Z\", \"dateReserved\": \"2024-06-24T13:53:25.535Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-25T14:22:41.566Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.