CVE-2024-35853 (GCVE-0-2024-35853)

Vulnerability from cvelistv5 – Published: 2024-05-17 14:47 – Updated: 2025-05-04 09:06
VLAI?
Title
mlxsw: spectrum_acl_tcam: Fix memory leak during rehash
Summary
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix memory leak during rehash The rehash delayed work migrates filters from one region to another. This is done by iterating over all chunks (all the filters with the same priority) in the region and in each chunk iterating over all the filters. If the migration fails, the code tries to migrate the filters back to the old region. However, the rollback itself can also fail in which case another migration will be erroneously performed. Besides the fact that this ping pong is not a very good idea, it also creates a problem. Each virtual chunk references two chunks: The currently used one ('vchunk->chunk') and a backup ('vchunk->chunk2'). During migration the first holds the chunk we want to migrate filters to and the second holds the chunk we are migrating filters from. The code currently assumes - but does not verify - that the backup chunk does not exist (NULL) if the currently used chunk does not reference the target region. This assumption breaks when we are trying to rollback a rollback, resulting in the backup chunk being overwritten and leaked [1]. Fix by not rolling back a failed rollback and add a warning to avoid future cases. [1] WARNING: CPU: 5 PID: 1063 at lib/parman.c:291 parman_destroy+0x17/0x20 Modules linked in: CPU: 5 PID: 1063 Comm: kworker/5:11 Tainted: G W 6.9.0-rc2-custom-00784-gc6a05c468a0b #14 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP: 0010:parman_destroy+0x17/0x20 [...] Call Trace: <TASK> mlxsw_sp_acl_atcam_region_fini+0x19/0x60 mlxsw_sp_acl_tcam_region_destroy+0x49/0xf0 mlxsw_sp_acl_tcam_vregion_rehash_work+0x1f1/0x470 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 ret_from_fork_asm+0x1a/0x30 </TASK>
Severity ?
6.4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 843500518509128a935edab96bd8efef7c54669e , < c6f3fa7f5a748bf6e5c4eb742686d6952f854e76 (git)
Affected: 843500518509128a935edab96bd8efef7c54669e , < 617e98ba4c50f4547c9eb0946b1cfc26937d70d1 (git)
Affected: 843500518509128a935edab96bd8efef7c54669e , < 413a01886c3958d4b8aac23a3bff3d430b92093e (git)
Affected: 843500518509128a935edab96bd8efef7c54669e , < b822644fd90992ee362c5e0c8d2556efc8856c76 (git)
Affected: 843500518509128a935edab96bd8efef7c54669e , < 0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cf (git)
Affected: 843500518509128a935edab96bd8efef7c54669e , < b3fd51f684a0711504f82de510da109ae639722d (git)
Affected: 843500518509128a935edab96bd8efef7c54669e , < 8ca3f7a7b61393804c46f170743c3b839df13977 (git)
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    Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.4.275 , ≤ 5.4.* (semver)
Unaffected: 5.10.216 , ≤ 5.10.* (semver)
Unaffected: 5.15.158 , ≤ 5.15.* (semver)
Unaffected: 6.1.90 , ≤ 6.1.* (semver)
Unaffected: 6.6.30 , ≤ 6.6.* (semver)
Unaffected: 6.8.9 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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\"843500518509128a935edab96bd8efef7c54669e\", \"lessThan\": \"b822644fd90992ee362c5e0c8d2556efc8856c76\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"843500518509128a935edab96bd8efef7c54669e\", \"lessThan\": \"0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"843500518509128a935edab96bd8efef7c54669e\", \"lessThan\": \"b3fd51f684a0711504f82de510da109ae639722d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"843500518509128a935edab96bd8efef7c54669e\", \"lessThan\": \"8ca3f7a7b61393804c46f170743c3b839df13977\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.1\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.1\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.275\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.216\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.158\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.90\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.30\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c6f3fa7f5a748bf6e5c4eb742686d6952f854e76\"}, {\"url\": \"https://git.kernel.org/stable/c/617e98ba4c50f4547c9eb0946b1cfc26937d70d1\"}, {\"url\": \"https://git.kernel.org/stable/c/413a01886c3958d4b8aac23a3bff3d430b92093e\"}, {\"url\": \"https://git.kernel.org/stable/c/b822644fd90992ee362c5e0c8d2556efc8856c76\"}, {\"url\": \"https://git.kernel.org/stable/c/0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cf\"}, {\"url\": \"https://git.kernel.org/stable/c/b3fd51f684a0711504f82de510da109ae639722d\"}, {\"url\": \"https://git.kernel.org/stable/c/8ca3f7a7b61393804c46f170743c3b839df13977\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmlxsw: spectrum_acl_tcam: Fix memory leak during rehash\\n\\nThe rehash delayed work migrates filters from one region to another.\\nThis is done by iterating over all chunks (all the filters with the same\\npriority) in the region and in each chunk iterating over all the\\nfilters.\\n\\nIf the migration fails, the code tries to migrate the filters back to\\nthe old region. However, the rollback itself can also fail in which case\\nanother migration will be erroneously performed. Besides the fact that\\nthis ping pong is not a very good idea, it also creates a problem.\\n\\nEach virtual chunk references two chunks: The currently used one\\n(\u0027vchunk-\u003echunk\u0027) and a backup (\u0027vchunk-\u003echunk2\u0027). During migration the\\nfirst holds the chunk we want to migrate filters to and the second holds\\nthe chunk we are migrating filters from.\\n\\nThe code currently assumes - but does not verify - that the backup chunk\\ndoes not exist (NULL) if the currently used chunk does not reference the\\ntarget region. This assumption breaks when we are trying to rollback a\\nrollback, resulting in the backup chunk being overwritten and leaked\\n[1].\\n\\nFix by not rolling back a failed rollback and add a warning to avoid\\nfuture cases.\\n\\n[1]\\nWARNING: CPU: 5 PID: 1063 at lib/parman.c:291 parman_destroy+0x17/0x20\\nModules linked in:\\nCPU: 5 PID: 1063 Comm: kworker/5:11 Tainted: G        W          6.9.0-rc2-custom-00784-gc6a05c468a0b #14\\nHardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019\\nWorkqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work\\nRIP: 0010:parman_destroy+0x17/0x20\\n[...]\\nCall Trace:\\n \u003cTASK\u003e\\n mlxsw_sp_acl_atcam_region_fini+0x19/0x60\\n mlxsw_sp_acl_tcam_region_destroy+0x49/0xf0\\n mlxsw_sp_acl_tcam_vregion_rehash_work+0x1f1/0x470\\n process_one_work+0x151/0x370\\n worker_thread+0x2cb/0x3e0\\n kthread+0xd0/0x100\\n ret_from_fork+0x34/0x50\\n ret_from_fork_asm+0x1a/0x30\\n \u003c/TASK\u003e\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T08:56:36.523Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-35853\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T08:56:36.523Z\", \"dateReserved\": \"2024-05-17T13:50:33.106Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-17T14:47:30.109Z\", \"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.
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  • 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.