CVE-2021-47562 (GCVE-0-2021-47562)
Vulnerability from cvelistv5
Published
2024-05-24 15:12
Modified
2025-05-04 07:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ice: fix vsi->txq_map sizing The approach of having XDP queue per CPU regardless of user's setting exposed a hidden bug that could occur in case when Rx queue count differ from Tx queue count. Currently vsi->txq_map's size is equal to the doubled vsi->alloc_txq, which is not correct due to the fact that XDP rings were previously based on the Rx queue count. Below splat can be seen when ethtool -L is used and XDP rings are configured: [ 682.875339] BUG: kernel NULL pointer dereference, address: 000000000000000f [ 682.883403] #PF: supervisor read access in kernel mode [ 682.889345] #PF: error_code(0x0000) - not-present page [ 682.895289] PGD 0 P4D 0 [ 682.898218] Oops: 0000 [#1] PREEMPT SMP PTI [ 682.903055] CPU: 42 PID: 2878 Comm: ethtool Tainted: G OE 5.15.0-rc5+ #1 [ 682.912214] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016 [ 682.923380] RIP: 0010:devres_remove+0x44/0x130 [ 682.928527] Code: 49 89 f4 55 48 89 fd 4c 89 ff 53 48 83 ec 10 e8 92 b9 49 00 48 8b 9d a8 02 00 00 48 8d 8d a0 02 00 00 49 89 c2 48 39 cb 74 0f <4c> 3b 63 10 74 25 48 8b 5b 08 48 39 cb 75 f1 4c 89 ff 4c 89 d6 e8 [ 682.950237] RSP: 0018:ffffc90006a679f0 EFLAGS: 00010002 [ 682.956285] RAX: 0000000000000286 RBX: ffffffffffffffff RCX: ffff88908343a370 [ 682.964538] RDX: 0000000000000001 RSI: ffffffff81690d60 RDI: 0000000000000000 [ 682.972789] RBP: ffff88908343a0d0 R08: 0000000000000000 R09: 0000000000000000 [ 682.981040] R10: 0000000000000286 R11: 3fffffffffffffff R12: ffffffff81690d60 [ 682.989282] R13: ffffffff81690a00 R14: ffff8890819807a8 R15: ffff88908343a36c [ 682.997535] FS: 00007f08c7bfa740(0000) GS:ffff88a03fd00000(0000) knlGS:0000000000000000 [ 683.006910] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 683.013557] CR2: 000000000000000f CR3: 0000001080a66003 CR4: 00000000003706e0 [ 683.021819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 683.030075] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 683.038336] Call Trace: [ 683.041167] devm_kfree+0x33/0x50 [ 683.045004] ice_vsi_free_arrays+0x5e/0xc0 [ice] [ 683.050380] ice_vsi_rebuild+0x4c8/0x750 [ice] [ 683.055543] ice_vsi_recfg_qs+0x9a/0x110 [ice] [ 683.060697] ice_set_channels+0x14f/0x290 [ice] [ 683.065962] ethnl_set_channels+0x333/0x3f0 [ 683.070807] genl_family_rcv_msg_doit+0xea/0x150 [ 683.076152] genl_rcv_msg+0xde/0x1d0 [ 683.080289] ? channels_prepare_data+0x60/0x60 [ 683.085432] ? genl_get_cmd+0xd0/0xd0 [ 683.089667] netlink_rcv_skb+0x50/0xf0 [ 683.094006] genl_rcv+0x24/0x40 [ 683.097638] netlink_unicast+0x239/0x340 [ 683.102177] netlink_sendmsg+0x22e/0x470 [ 683.106717] sock_sendmsg+0x5e/0x60 [ 683.110756] __sys_sendto+0xee/0x150 [ 683.114894] ? handle_mm_fault+0xd0/0x2a0 [ 683.119535] ? do_user_addr_fault+0x1f3/0x690 [ 683.134173] __x64_sys_sendto+0x25/0x30 [ 683.148231] do_syscall_64+0x3b/0xc0 [ 683.161992] entry_SYSCALL_64_after_hwframe+0x44/0xae Fix this by taking into account the value that num_possible_cpus() yields in addition to vsi->alloc_txq instead of doubling the latter.
References
Impacted products
Vendor Product Version
Linux Linux Version: efc2214b6047b6f5b4ca53151eba62521b9452d6
Version: efc2214b6047b6f5b4ca53151eba62521b9452d6
Version: efc2214b6047b6f5b4ca53151eba62521b9452d6
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                "id": "CVE-2021-47562",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: fix vsi-\u003etxq_map sizing\n\nThe approach of having XDP queue per CPU regardless of user\u0027s setting\nexposed a hidden bug that could occur in case when Rx queue count differ\nfrom Tx queue count. Currently vsi-\u003etxq_map\u0027s size is equal to the\ndoubled vsi-\u003ealloc_txq, which is not correct due to the fact that XDP\nrings were previously based on the Rx queue count. Below splat can be\nseen when ethtool -L is used and XDP rings are configured:\n\n[  682.875339] BUG: kernel NULL pointer dereference, address: 000000000000000f\n[  682.883403] #PF: supervisor read access in kernel mode\n[  682.889345] #PF: error_code(0x0000) - not-present page\n[  682.895289] PGD 0 P4D 0\n[  682.898218] Oops: 0000 [#1] PREEMPT SMP PTI\n[  682.903055] CPU: 42 PID: 2878 Comm: ethtool Tainted: G           OE     5.15.0-rc5+ #1\n[  682.912214] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016\n[  682.923380] RIP: 0010:devres_remove+0x44/0x130\n[  682.928527] Code: 49 89 f4 55 48 89 fd 4c 89 ff 53 48 83 ec 10 e8 92 b9 49 00 48 8b 9d a8 02 00 00 48 8d 8d a0 02 00 00 49 89 c2 48 39 cb 74 0f \u003c4c\u003e 3b 63 10 74 25 48 8b 5b 08 48 39 cb 75 f1 4c 89 ff 4c 89 d6 e8\n[  682.950237] RSP: 0018:ffffc90006a679f0 EFLAGS: 00010002\n[  682.956285] RAX: 0000000000000286 RBX: ffffffffffffffff RCX: ffff88908343a370\n[  682.964538] RDX: 0000000000000001 RSI: ffffffff81690d60 RDI: 0000000000000000\n[  682.972789] RBP: ffff88908343a0d0 R08: 0000000000000000 R09: 0000000000000000\n[  682.981040] R10: 0000000000000286 R11: 3fffffffffffffff R12: ffffffff81690d60\n[  682.989282] R13: ffffffff81690a00 R14: ffff8890819807a8 R15: ffff88908343a36c\n[  682.997535] FS:  00007f08c7bfa740(0000) GS:ffff88a03fd00000(0000) knlGS:0000000000000000\n[  683.006910] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  683.013557] CR2: 000000000000000f CR3: 0000001080a66003 CR4: 00000000003706e0\n[  683.021819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[  683.030075] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[  683.038336] Call Trace:\n[  683.041167]  devm_kfree+0x33/0x50\n[  683.045004]  ice_vsi_free_arrays+0x5e/0xc0 [ice]\n[  683.050380]  ice_vsi_rebuild+0x4c8/0x750 [ice]\n[  683.055543]  ice_vsi_recfg_qs+0x9a/0x110 [ice]\n[  683.060697]  ice_set_channels+0x14f/0x290 [ice]\n[  683.065962]  ethnl_set_channels+0x333/0x3f0\n[  683.070807]  genl_family_rcv_msg_doit+0xea/0x150\n[  683.076152]  genl_rcv_msg+0xde/0x1d0\n[  683.080289]  ? channels_prepare_data+0x60/0x60\n[  683.085432]  ? genl_get_cmd+0xd0/0xd0\n[  683.089667]  netlink_rcv_skb+0x50/0xf0\n[  683.094006]  genl_rcv+0x24/0x40\n[  683.097638]  netlink_unicast+0x239/0x340\n[  683.102177]  netlink_sendmsg+0x22e/0x470\n[  683.106717]  sock_sendmsg+0x5e/0x60\n[  683.110756]  __sys_sendto+0xee/0x150\n[  683.114894]  ? handle_mm_fault+0xd0/0x2a0\n[  683.119535]  ? do_user_addr_fault+0x1f3/0x690\n[  683.134173]  __x64_sys_sendto+0x25/0x30\n[  683.148231]  do_syscall_64+0x3b/0xc0\n[  683.161992]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nFix this by taking into account the value that num_possible_cpus()\nyields in addition to vsi-\u003ealloc_txq instead of doubling the latter."
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      "title": "ice: fix vsi-\u003etxq_map sizing",
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    "cveId": "CVE-2021-47562",
    "datePublished": "2024-05-24T15:12:50.733Z",
    "dateReserved": "2024-05-24T15:11:00.728Z",
    "dateUpdated": "2025-05-04T07:13:37.379Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
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    "vulnrichment": {
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Currently vsi-\u003etxq_map\u0027s size is equal to the\\ndoubled vsi-\u003ealloc_txq, which is not correct due to the fact that XDP\\nrings were previously based on the Rx queue count. Below splat can be\\nseen when ethtool -L is used and XDP rings are configured:\\n\\n[  682.875339] BUG: kernel NULL pointer dereference, address: 000000000000000f\\n[  682.883403] #PF: supervisor read access in kernel mode\\n[  682.889345] #PF: error_code(0x0000) - not-present page\\n[  682.895289] PGD 0 P4D 0\\n[  682.898218] Oops: 0000 [#1] PREEMPT SMP PTI\\n[  682.903055] CPU: 42 PID: 2878 Comm: ethtool Tainted: G           OE     5.15.0-rc5+ #1\\n[  682.912214] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016\\n[  682.923380] RIP: 0010:devres_remove+0x44/0x130\\n[  682.928527] Code: 49 89 f4 55 48 89 fd 4c 89 ff 53 48 83 ec 10 e8 92 b9 49 00 48 8b 9d a8 02 00 00 48 8d 8d a0 02 00 00 49 89 c2 48 39 cb 74 0f \u003c4c\u003e 3b 63 10 74 25 48 8b 5b 08 48 39 cb 75 f1 4c 89 ff 4c 89 d6 e8\\n[  682.950237] RSP: 0018:ffffc90006a679f0 EFLAGS: 00010002\\n[  682.956285] RAX: 0000000000000286 RBX: ffffffffffffffff RCX: ffff88908343a370\\n[  682.964538] RDX: 0000000000000001 RSI: ffffffff81690d60 RDI: 0000000000000000\\n[  682.972789] RBP: ffff88908343a0d0 R08: 0000000000000000 R09: 0000000000000000\\n[  682.981040] R10: 0000000000000286 R11: 3fffffffffffffff R12: ffffffff81690d60\\n[  682.989282] R13: ffffffff81690a00 R14: ffff8890819807a8 R15: ffff88908343a36c\\n[  682.997535] FS:  00007f08c7bfa740(0000) GS:ffff88a03fd00000(0000) knlGS:0000000000000000\\n[  683.006910] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[  683.013557] CR2: 000000000000000f CR3: 0000001080a66003 CR4: 00000000003706e0\\n[  683.021819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[  683.030075] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n[  683.038336] Call Trace:\\n[  683.041167]  devm_kfree+0x33/0x50\\n[  683.045004]  ice_vsi_free_arrays+0x5e/0xc0 [ice]\\n[  683.050380]  ice_vsi_rebuild+0x4c8/0x750 [ice]\\n[  683.055543]  ice_vsi_recfg_qs+0x9a/0x110 [ice]\\n[  683.060697]  ice_set_channels+0x14f/0x290 [ice]\\n[  683.065962]  ethnl_set_channels+0x333/0x3f0\\n[  683.070807]  genl_family_rcv_msg_doit+0xea/0x150\\n[  683.076152]  genl_rcv_msg+0xde/0x1d0\\n[  683.080289]  ? channels_prepare_data+0x60/0x60\\n[  683.085432]  ? genl_get_cmd+0xd0/0xd0\\n[  683.089667]  netlink_rcv_skb+0x50/0xf0\\n[  683.094006]  genl_rcv+0x24/0x40\\n[  683.097638]  netlink_unicast+0x239/0x340\\n[  683.102177]  netlink_sendmsg+0x22e/0x470\\n[  683.106717]  sock_sendmsg+0x5e/0x60\\n[  683.110756]  __sys_sendto+0xee/0x150\\n[  683.114894]  ? handle_mm_fault+0xd0/0x2a0\\n[  683.119535]  ? do_user_addr_fault+0x1f3/0x690\\n[  683.134173]  __x64_sys_sendto+0x25/0x30\\n[  683.148231]  do_syscall_64+0x3b/0xc0\\n[  683.161992]  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nFix this by taking into account the value that num_possible_cpus()\\nyields in addition to vsi-\u003ealloc_txq instead of doubling the latter.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.83\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.6\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"5.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:13:37.379Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47562\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:13:37.379Z\", \"dateReserved\": \"2024-05-24T15:11:00.728Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-24T15:12:50.733Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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