cve-2024-26586
Vulnerability from cvelistv5
Published
2024-02-22 16:13
Modified
2024-08-02 00:07
Severity
Summary
mlxsw: spectrum_acl_tcam: Fix stack corruption
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f5e1565740490706332c06f36211d4ce0f88e62Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/348112522a35527c5bcba933b9fefb40a4f44f15Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/483ae90d8f976f8339cf81066312e1329f2d3706Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/56750ea5d15426b5f307554e7699e8b5f76c3182Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6fd24675188d354b1cad47462969afa2ab09d819Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a361c2c1da5dbb13ca67601cf961ab3ad68af383Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum_acl_tcam: Fix stack corruption\n\nWhen tc filters are first added to a net device, the corresponding local\nport gets bound to an ACL group in the device. The group contains a list\nof ACLs. In turn, each ACL points to a different TCAM region where the\nfilters are stored. During forwarding, the ACLs are sequentially\nevaluated until a match is found.\n\nOne reason to place filters in different regions is when they are added\nwith decreasing priorities and in an alternating order so that two\nconsecutive filters can never fit in the same region because of their\nkey usage.\n\nIn Spectrum-2 and newer ASICs the firmware started to report that the\nmaximum number of ACLs in a group is more than 16, but the layout of the\nregister that configures ACL groups (PAGT) was not updated to account\nfor that. It is therefore possible to hit stack corruption [1] in the\nrare case where more than 16 ACLs in a group are required.\n\nFix by limiting the maximum ACL group size to the minimum between what\nthe firmware reports and the maximum ACLs that fit in the PAGT register.\n\nAdd a test case to make sure the machine does not crash when this\ncondition is hit.\n\n[1]\nKernel panic - not syncing: stack-protector: Kernel stack is corrupted in: mlxsw_sp_acl_tcam_group_update+0x116/0x120\n[...]\n dump_stack_lvl+0x36/0x50\n panic+0x305/0x330\n __stack_chk_fail+0x15/0x20\n mlxsw_sp_acl_tcam_group_update+0x116/0x120\n mlxsw_sp_acl_tcam_group_region_attach+0x69/0x110\n mlxsw_sp_acl_tcam_vchunk_get+0x492/0xa20\n mlxsw_sp_acl_tcam_ventry_add+0x25/0xe0\n mlxsw_sp_acl_rule_add+0x47/0x240\n mlxsw_sp_flower_replace+0x1a9/0x1d0\n tc_setup_cb_add+0xdc/0x1c0\n fl_hw_replace_filter+0x146/0x1f0\n fl_change+0xc17/0x1360\n tc_new_tfilter+0x472/0xb90\n rtnetlink_rcv_msg+0x313/0x3b0\n netlink_rcv_skb+0x58/0x100\n netlink_unicast+0x244/0x390\n netlink_sendmsg+0x1e4/0x440\n ____sys_sendmsg+0x164/0x260\n ___sys_sendmsg+0x9a/0xe0\n __sys_sendmsg+0x7a/0xc0\n do_syscall_64+0x40/0xe0\n entry_SYSCALL_64_after_hwframe+0x63/0x6b"
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    "cveId": "CVE-2024-26586",
    "datePublished": "2024-02-22T16:13:31.796Z",
    "dateReserved": "2024-02-19T14:20:24.125Z",
    "dateUpdated": "2024-08-02T00:07:19.636Z",
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During forwarding, the ACLs are sequentially\\nevaluated until a match is found.\\n\\nOne reason to place filters in different regions is when they are added\\nwith decreasing priorities and in an alternating order so that two\\nconsecutive filters can never fit in the same region because of their\\nkey usage.\\n\\nIn Spectrum-2 and newer ASICs the firmware started to report that the\\nmaximum number of ACLs in a group is more than 16, but the layout of the\\nregister that configures ACL groups (PAGT) was not updated to account\\nfor that. It is therefore possible to hit stack corruption [1] in the\\nrare case where more than 16 ACLs in a group are required.\\n\\nFix by limiting the maximum ACL group size to the minimum between what\\nthe firmware reports and the maximum ACLs that fit in the PAGT register.\\n\\nAdd a test case to make sure the machine does not crash when this\\ncondition is hit.\\n\\n[1]\\nKernel panic - not syncing: stack-protector: Kernel stack is corrupted in: mlxsw_sp_acl_tcam_group_update+0x116/0x120\\n[...]\\n dump_stack_lvl+0x36/0x50\\n panic+0x305/0x330\\n __stack_chk_fail+0x15/0x20\\n mlxsw_sp_acl_tcam_group_update+0x116/0x120\\n mlxsw_sp_acl_tcam_group_region_attach+0x69/0x110\\n mlxsw_sp_acl_tcam_vchunk_get+0x492/0xa20\\n mlxsw_sp_acl_tcam_ventry_add+0x25/0xe0\\n mlxsw_sp_acl_rule_add+0x47/0x240\\n mlxsw_sp_flower_replace+0x1a9/0x1d0\\n tc_setup_cb_add+0xdc/0x1c0\\n fl_hw_replace_filter+0x146/0x1f0\\n fl_change+0xc17/0x1360\\n tc_new_tfilter+0x472/0xb90\\n rtnetlink_rcv_msg+0x313/0x3b0\\n netlink_rcv_skb+0x58/0x100\\n netlink_unicast+0x244/0x390\\n netlink_sendmsg+0x1e4/0x440\\n ____sys_sendmsg+0x164/0x260\\n ___sys_sendmsg+0x9a/0xe0\\n __sys_sendmsg+0x7a/0xc0\\n do_syscall_64+0x40/0xe0\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mlxsw: espectro_acl_tcam: corrige la corrupci\u00f3n de la pila Cuando los filtros tc se agregan por primera vez a un dispositivo de red, el puerto local correspondiente se vincula a un grupo ACL en el dispositivo. El grupo contiene una lista de ACL. A su vez, cada ACL apunta a una regi\u00f3n TCAM diferente donde se almacenan los filtros. Durante el reenv\u00edo, las ACL se eval\u00faan secuencialmente hasta que se encuentra una coincidencia. Una raz\u00f3n para colocar filtros en diferentes regiones es cuando se agregan con prioridades decrecientes y en orden alterno, de modo que dos filtros consecutivos nunca puedan caber en la misma regi\u00f3n debido a su uso clave. En Spectrum-2 y ASIC m\u00e1s nuevos, el firmware comenz\u00f3 a informar que la cantidad m\u00e1xima de ACL en un grupo es superior a 16, pero el dise\u00f1o del registro que configura los grupos de ACL (PAGT) no se actualiz\u00f3 para tener en cuenta eso. Por lo tanto, es posible sufrir da\u00f1os en la pila [1] en el raro caso de que se requieran m\u00e1s de 16 ACL en un grupo. 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  }
}


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