CVE-2022-49649 (GCVE-0-2022-49649)
Vulnerability from cvelistv5
Published
2025-02-26 02:23
Modified
2025-05-04 08:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue xenvif_rx_next_skb() is expecting the rx queue not being empty, but in case the loop in xenvif_rx_action() is doing multiple iterations, the availability of another skb in the rx queue is not being checked. This can lead to crashes: [40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.537534] PGD 0 P4D 0 [40072.537644] Oops: 0000 [#1] SMP NOPTI [40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5 [40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021 [40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000 [40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246 [40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7 [40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8 [40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008 [40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708 [40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0 [40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000 [40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660 [40072.539211] Call Trace: [40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback] [40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback] Fix that by stopping the loop in case the rx queue becomes empty.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722daPatch
Impacted products
Vendor Product Version
Linux Linux Version: 98f6d57ced73b723551568262019f1d6c8771f20
Version: 98f6d57ced73b723551568262019f1d6c8771f20
Version: 98f6d57ced73b723551568262019f1d6c8771f20
Version: 98f6d57ced73b723551568262019f1d6c8771f20
Version: 98f6d57ced73b723551568262019f1d6c8771f20
Version: 98f6d57ced73b723551568262019f1d6c8771f20
Version: 98f6d57ced73b723551568262019f1d6c8771f20
Version: 98f6d57ced73b723551568262019f1d6c8771f20
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/xen-netback/rx.c"
          ],
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          "vendor": "Linux",
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        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "4.9.324",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "4.14.289",
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            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.253",
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              "status": "unaffected",
              "version": "5.4.207",
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              "status": "unaffected",
              "version": "5.10.132",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.15.56",
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              "version": "5.18.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.324",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "4.14.289",
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                  "versionEndExcluding": "4.19.253",
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                  "vulnerable": true
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                  "versionEndExcluding": "5.4.207",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.13",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue\n\nxenvif_rx_next_skb() is expecting the rx queue not being empty, but\nin case the loop in xenvif_rx_action() is doing multiple iterations,\nthe availability of another skb in the rx queue is not being checked.\n\nThis can lead to crashes:\n\n[40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080\n[40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.537534] PGD 0 P4D 0\n[40072.537644] Oops: 0000 [#1] SMP NOPTI\n[40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5\n[40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021\n[40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000\n[40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246\n[40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7\n[40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8\n[40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008\n[40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708\n[40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0\n[40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000\n[40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033\n[40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660\n[40072.539211] Call Trace:\n[40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback]\n[40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback]\n\nFix that by stopping the loop in case the rx queue becomes empty."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:42:33.632Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687"
        },
        {
          "url": "https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02"
        },
        {
          "url": "https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1c"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722da"
        },
        {
          "url": "https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9"
        }
      ],
      "title": "xen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49649",
    "datePublished": "2025-02-26T02:23:52.531Z",
    "dateReserved": "2025-02-26T02:21:30.433Z",
    "dateUpdated": "2025-05-04T08:42:33.632Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49649\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:40.050\",\"lastModified\":\"2025-03-11T22:24:42.743\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nxen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue\\n\\nxenvif_rx_next_skb() is expecting the rx queue not being empty, but\\nin case the loop in xenvif_rx_action() is doing multiple iterations,\\nthe availability of another skb in the rx queue is not being checked.\\n\\nThis can lead to crashes:\\n\\n[40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080\\n[40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback]\\n[40072.537534] PGD 0 P4D 0\\n[40072.537644] Oops: 0000 [#1] SMP NOPTI\\n[40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5\\n[40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021\\n[40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000\\n[40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback]\\n[40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246\\n[40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7\\n[40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8\\n[40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008\\n[40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708\\n[40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0\\n[40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000\\n[40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660\\n[40072.539211] Call Trace:\\n[40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback]\\n[40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback]\\n\\nFix that by stopping the loop in case the rx queue becomes empty.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xen/netback: evitar ingresar a xenvif_rx_next_skb() con una cola rx vac\u00eda xenvif_rx_next_skb() espera que la cola rx no est\u00e9 vac\u00eda, pero en caso de que el bucle en xenvif_rx_action() est\u00e9 realizando m\u00faltiples iteraciones, no se verifica la disponibilidad de otro skb en la cola rx. Esto puede provocar fallos: [40072.537261] ERROR: no se puede gestionar la desreferencia del puntero NULL del n\u00facleo en 0000000000000080 [40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.537534] PGD 0 P4D 0 [40072.537644] Oops: 0000 [#1] SMP NOPTI [40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5 [40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021 [40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000 [40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback] [40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246 [40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7 [40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8 [40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008 [40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708 [40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0 [40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000 [40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033 [40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660 [40072.539211] Call Trace: [40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback] [40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback] Solucione esto deteniendo el bucle en caso de que la cola de recepci\u00f3n se vac\u00ede.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9\",\"versionEndExcluding\":\"4.9.324\",\"matchCriteriaId\":\"FA144DE8-6BF0-4219-AA61-5F6BBE651EFA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.289\",\"matchCriteriaId\":\"9209AEEF-782D-43E6-AA5C-9F5B9CD6ED11\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.253\",\"matchCriteriaId\":\"2B22ACD7-9025-4AD5-AD6E-A929DEC79B75\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.207\",\"matchCriteriaId\":\"C27A52F3-82C8-4F03-BE80-38D11CDBD503\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.132\",\"matchCriteriaId\":\"46CE9FE9-22E3-45CA-8B5F-190C2CAFC5CE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.56\",\"matchCriteriaId\":\"AF59CE2F-BA66-4BFD-83AB-4576F3D1B49A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.18.13\",\"matchCriteriaId\":\"640221A7-96EE-4B48-8FE1-BA810131789B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"A8C30C2D-F82D-4D37-AB48-D76ABFBD5377\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"BF8547FC-C849-4F1B-804B-A93AE2F04A92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F3068028-F453-4A1C-B80F-3F5609ACEF60\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"2E9C0DB0-D349-489F-A3D6-B77214E93A8A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"1A0DE3B7-0FFB-45AA-9BD6-19870CA7C6FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"00AE778B-BAEE-49EB-9F84-003B73D7862A\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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