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

Vulnerability from cvelistv5 – Published: 2024-06-25 14:22 – Updated: 2025-05-04 09:16
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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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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Sightings

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  • 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.