cve-2024-35853
Vulnerability from cvelistv5
Published
2024-05-17 14:47
Modified
2024-08-02 03:21
Severity
6.4 (Medium) - cvssV3_1 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Summary
mlxsw: spectrum_acl_tcam: Fix memory leak during rehash
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/413a01886c3958d4b8aac23a3bff3d430b92093e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/617e98ba4c50f4547c9eb0946b1cfc26937d70d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ca3f7a7b61393804c46f170743c3b839df13977
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b3fd51f684a0711504f82de510da109ae639722d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b822644fd90992ee362c5e0c8d2556efc8856c76
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c6f3fa7f5a748bf6e5c4eb742686d6952f854e76
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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    "dateUpdated": "2024-08-02T03:21:48.394Z",
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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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mlxsw: spectrum_acl_tcam: corrige la p\u00e9rdida de memoria durante el rehash El trabajo retrasado del rehash migra los filtros de una regi\u00f3n a otra. Esto se hace iterando sobre todos los fragmentos (todos los filtros con la misma prioridad) en la regi\u00f3n y en cada fragmento iterando sobre todos los filtros. Si la migraci\u00f3n fallo, el c\u00f3digo intenta migrar los filtros nuevamente a la regi\u00f3n anterior. Sin embargo, la reversi\u00f3n en s\u00ed tambi\u00e9n puede fallor, en cuyo caso se realizar\u00e1 otra migraci\u00f3n por error. Adem\u00e1s de que este ping pong no es una muy buena idea, tambi\u00e9n crea un problema. Cada fragmento virtual hace referencia a dos fragmentos: el que se utiliza actualmente (\u0027vchunk-\u0026gt;chunk\u0027) y una copia de seguridad (\u0027vchunk-\u0026gt;chunk2\u0027). Durante la migraci\u00f3n, el primero contiene el fragmento al que queremos migrar los filtros y el segundo contiene el fragmento desde el que estamos migrando los filtros. Actualmente, el c\u00f3digo supone, pero no verifica, que el fragmento de copia de seguridad no existe (NULL) si el fragmento utilizado actualmente no hace referencia a la regi\u00f3n de destino. 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  }
}


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