CVE-2025-37750 (GCVE-0-2025-37750)
Vulnerability from cvelistv5
Published
2025-05-01 12:55
Modified
2025-05-26 05:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF in decryption with multichannel After commit f7025d861694 ("smb: client: allocate crypto only for primary server") and commit b0abcd65ec54 ("smb: client: fix UAF in async decryption"), the channels started reusing AEAD TFM from primary channel to perform synchronous decryption, but that can't done as there could be multiple cifsd threads (one per channel) simultaneously accessing it to perform decryption. This fixes the following KASAN splat when running fstest generic/249 with 'vers=3.1.1,multichannel,max_channels=4,seal' against Windows Server 2022: BUG: KASAN: slab-use-after-free in gf128mul_4k_lle+0xba/0x110 Read of size 8 at addr ffff8881046c18a0 by task cifsd/986 CPU: 3 UID: 0 PID: 986 Comm: cifsd Not tainted 6.15.0-rc1 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x5d/0x80 print_report+0x156/0x528 ? gf128mul_4k_lle+0xba/0x110 ? __virt_addr_valid+0x145/0x300 ? __phys_addr+0x46/0x90 ? gf128mul_4k_lle+0xba/0x110 kasan_report+0xdf/0x1a0 ? gf128mul_4k_lle+0xba/0x110 gf128mul_4k_lle+0xba/0x110 ghash_update+0x189/0x210 shash_ahash_update+0x295/0x370 ? __pfx_shash_ahash_update+0x10/0x10 ? __pfx_shash_ahash_update+0x10/0x10 ? __pfx_extract_iter_to_sg+0x10/0x10 ? ___kmalloc_large_node+0x10e/0x180 ? __asan_memset+0x23/0x50 crypto_ahash_update+0x3c/0xc0 gcm_hash_assoc_remain_continue+0x93/0xc0 crypt_message+0xe09/0xec0 [cifs] ? __pfx_crypt_message+0x10/0x10 [cifs] ? _raw_spin_unlock+0x23/0x40 ? __pfx_cifs_readv_from_socket+0x10/0x10 [cifs] decrypt_raw_data+0x229/0x380 [cifs] ? __pfx_decrypt_raw_data+0x10/0x10 [cifs] ? __pfx_cifs_read_iter_from_socket+0x10/0x10 [cifs] smb3_receive_transform+0x837/0xc80 [cifs] ? __pfx_smb3_receive_transform+0x10/0x10 [cifs] ? __pfx___might_resched+0x10/0x10 ? __pfx_smb3_is_transform_hdr+0x10/0x10 [cifs] cifs_demultiplex_thread+0x692/0x1570 [cifs] ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs] ? rcu_is_watching+0x20/0x50 ? rcu_lockdep_current_cpu_online+0x62/0xb0 ? find_held_lock+0x32/0x90 ? kvm_sched_clock_read+0x11/0x20 ? local_clock_noinstr+0xd/0xd0 ? trace_irq_enable.constprop.0+0xa8/0xe0 ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs] kthread+0x1fe/0x380 ? kthread+0x10f/0x380 ? __pfx_kthread+0x10/0x10 ? local_clock_noinstr+0xd/0xd0 ? ret_from_fork+0x1b/0x60 ? local_clock+0x15/0x30 ? lock_release+0x29b/0x390 ? rcu_is_watching+0x20/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x31/0x60 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK>
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9502dd5c7029902f4a425bf959917a5a9e7c0e50
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/950557922c1298464749c216d8763e97faf5d0a6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aa5a1e4b882964eb79d5b5d1d1e8a1a5efbb1d15
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e859b216d94668bc66330e61be201234f4413d1a
Impacted products
Vendor Product Version
Linux Linux Version: b0abcd65ec545701b8793e12bc27dc98042b151a
Version: b0abcd65ec545701b8793e12bc27dc98042b151a
Version: b0abcd65ec545701b8793e12bc27dc98042b151a
Version: b0abcd65ec545701b8793e12bc27dc98042b151a
Version: 8f14a476abba13144df5434871a7225fd29af633
Version: ef51c0d544b1518b35364480317ab6d3468f205d
Version: bce966530fd5542bbb422cb45ecb775f7a1a6bc3
Version: 0809fb86ad13b29e1d6d491364fc7ea4fb545995
Version: 538c26d9bf70c90edc460d18c81008a4e555925a
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   Linux Linux Version: 6.12
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/cifsencrypt.c",
            "fs/smb/client/smb2ops.c",
            "fs/smb/client/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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            {
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              "version": "bce966530fd5542bbb422cb45ecb775f7a1a6bc3",
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            {
              "status": "affected",
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              "versionType": "git"
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            {
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              "version": "538c26d9bf70c90edc460d18c81008a4e555925a",
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            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/cifsencrypt.c",
            "fs/smb/client/smb2ops.c",
            "fs/smb/client/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.24",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.12",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.3",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.10.237",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.15.181",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.128",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.6.57",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.11.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix UAF in decryption with multichannel\n\nAfter commit f7025d861694 (\"smb: client: allocate crypto only for\nprimary server\") and commit b0abcd65ec54 (\"smb: client: fix UAF in\nasync decryption\"), the channels started reusing AEAD TFM from primary\nchannel to perform synchronous decryption, but that can\u0027t done as\nthere could be multiple cifsd threads (one per channel) simultaneously\naccessing it to perform decryption.\n\nThis fixes the following KASAN splat when running fstest generic/249\nwith \u0027vers=3.1.1,multichannel,max_channels=4,seal\u0027 against Windows\nServer 2022:\n\nBUG: KASAN: slab-use-after-free in gf128mul_4k_lle+0xba/0x110\nRead of size 8 at addr ffff8881046c18a0 by task cifsd/986\nCPU: 3 UID: 0 PID: 986 Comm: cifsd Not tainted 6.15.0-rc1 #1\nPREEMPT(voluntary)\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41\n04/01/2014\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x5d/0x80\n print_report+0x156/0x528\n ? gf128mul_4k_lle+0xba/0x110\n ? __virt_addr_valid+0x145/0x300\n ? __phys_addr+0x46/0x90\n ? gf128mul_4k_lle+0xba/0x110\n kasan_report+0xdf/0x1a0\n ? gf128mul_4k_lle+0xba/0x110\n gf128mul_4k_lle+0xba/0x110\n ghash_update+0x189/0x210\n shash_ahash_update+0x295/0x370\n ? __pfx_shash_ahash_update+0x10/0x10\n ? __pfx_shash_ahash_update+0x10/0x10\n ? __pfx_extract_iter_to_sg+0x10/0x10\n ? ___kmalloc_large_node+0x10e/0x180\n ? __asan_memset+0x23/0x50\n crypto_ahash_update+0x3c/0xc0\n gcm_hash_assoc_remain_continue+0x93/0xc0\n crypt_message+0xe09/0xec0 [cifs]\n ? __pfx_crypt_message+0x10/0x10 [cifs]\n ? _raw_spin_unlock+0x23/0x40\n ? __pfx_cifs_readv_from_socket+0x10/0x10 [cifs]\n decrypt_raw_data+0x229/0x380 [cifs]\n ? __pfx_decrypt_raw_data+0x10/0x10 [cifs]\n ? __pfx_cifs_read_iter_from_socket+0x10/0x10 [cifs]\n smb3_receive_transform+0x837/0xc80 [cifs]\n ? __pfx_smb3_receive_transform+0x10/0x10 [cifs]\n ? __pfx___might_resched+0x10/0x10\n ? __pfx_smb3_is_transform_hdr+0x10/0x10 [cifs]\n cifs_demultiplex_thread+0x692/0x1570 [cifs]\n ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\n ? rcu_is_watching+0x20/0x50\n ? rcu_lockdep_current_cpu_online+0x62/0xb0\n ? find_held_lock+0x32/0x90\n ? kvm_sched_clock_read+0x11/0x20\n ? local_clock_noinstr+0xd/0xd0\n ? trace_irq_enable.constprop.0+0xa8/0xe0\n ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\n kthread+0x1fe/0x380\n ? kthread+0x10f/0x380\n ? __pfx_kthread+0x10/0x10\n ? local_clock_noinstr+0xd/0xd0\n ? ret_from_fork+0x1b/0x60\n ? local_clock+0x15/0x30\n ? lock_release+0x29b/0x390\n ? rcu_is_watching+0x20/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x31/0x60\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:20:05.418Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aa5a1e4b882964eb79d5b5d1d1e8a1a5efbb1d15"
        },
        {
          "url": "https://git.kernel.org/stable/c/e859b216d94668bc66330e61be201234f4413d1a"
        },
        {
          "url": "https://git.kernel.org/stable/c/950557922c1298464749c216d8763e97faf5d0a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/9502dd5c7029902f4a425bf959917a5a9e7c0e50"
        }
      ],
      "title": "smb: client: fix UAF in decryption with multichannel",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37750",
    "datePublished": "2025-05-01T12:55:55.988Z",
    "dateReserved": "2025-04-16T04:51:23.937Z",
    "dateUpdated": "2025-05-26T05:20:05.418Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37750\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T13:15:53.740\",\"lastModified\":\"2025-05-02T13:53:20.943\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: fix UAF in decryption with multichannel\\n\\nAfter commit f7025d861694 (\\\"smb: client: allocate crypto only for\\nprimary server\\\") and commit b0abcd65ec54 (\\\"smb: client: fix UAF in\\nasync decryption\\\"), the channels started reusing AEAD TFM from primary\\nchannel to perform synchronous decryption, but that can\u0027t done as\\nthere could be multiple cifsd threads (one per channel) simultaneously\\naccessing it to perform decryption.\\n\\nThis fixes the following KASAN splat when running fstest generic/249\\nwith \u0027vers=3.1.1,multichannel,max_channels=4,seal\u0027 against Windows\\nServer 2022:\\n\\nBUG: KASAN: slab-use-after-free in gf128mul_4k_lle+0xba/0x110\\nRead of size 8 at addr ffff8881046c18a0 by task cifsd/986\\nCPU: 3 UID: 0 PID: 986 Comm: cifsd Not tainted 6.15.0-rc1 #1\\nPREEMPT(voluntary)\\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41\\n04/01/2014\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0x5d/0x80\\n print_report+0x156/0x528\\n ? gf128mul_4k_lle+0xba/0x110\\n ? __virt_addr_valid+0x145/0x300\\n ? __phys_addr+0x46/0x90\\n ? gf128mul_4k_lle+0xba/0x110\\n kasan_report+0xdf/0x1a0\\n ? gf128mul_4k_lle+0xba/0x110\\n gf128mul_4k_lle+0xba/0x110\\n ghash_update+0x189/0x210\\n shash_ahash_update+0x295/0x370\\n ? __pfx_shash_ahash_update+0x10/0x10\\n ? __pfx_shash_ahash_update+0x10/0x10\\n ? __pfx_extract_iter_to_sg+0x10/0x10\\n ? ___kmalloc_large_node+0x10e/0x180\\n ? __asan_memset+0x23/0x50\\n crypto_ahash_update+0x3c/0xc0\\n gcm_hash_assoc_remain_continue+0x93/0xc0\\n crypt_message+0xe09/0xec0 [cifs]\\n ? __pfx_crypt_message+0x10/0x10 [cifs]\\n ? _raw_spin_unlock+0x23/0x40\\n ? __pfx_cifs_readv_from_socket+0x10/0x10 [cifs]\\n decrypt_raw_data+0x229/0x380 [cifs]\\n ? __pfx_decrypt_raw_data+0x10/0x10 [cifs]\\n ? __pfx_cifs_read_iter_from_socket+0x10/0x10 [cifs]\\n smb3_receive_transform+0x837/0xc80 [cifs]\\n ? __pfx_smb3_receive_transform+0x10/0x10 [cifs]\\n ? __pfx___might_resched+0x10/0x10\\n ? __pfx_smb3_is_transform_hdr+0x10/0x10 [cifs]\\n cifs_demultiplex_thread+0x692/0x1570 [cifs]\\n ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\\n ? rcu_is_watching+0x20/0x50\\n ? rcu_lockdep_current_cpu_online+0x62/0xb0\\n ? find_held_lock+0x32/0x90\\n ? kvm_sched_clock_read+0x11/0x20\\n ? local_clock_noinstr+0xd/0xd0\\n ? trace_irq_enable.constprop.0+0xa8/0xe0\\n ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\\n kthread+0x1fe/0x380\\n ? kthread+0x10f/0x380\\n ? __pfx_kthread+0x10/0x10\\n ? local_clock_noinstr+0xd/0xd0\\n ? ret_from_fork+0x1b/0x60\\n ? local_clock+0x15/0x30\\n ? lock_release+0x29b/0x390\\n ? rcu_is_watching+0x20/0x50\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork+0x31/0x60\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork_asm+0x1a/0x30\\n \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: corregir UAF en descifrado con multicanal Despu\u00e9s de la confirmaci\u00f3n f7025d861694 (\\\"smb: cliente: asignar criptograf\u00eda solo para el servidor principal\\\") y la confirmaci\u00f3n b0abcd65ec54 (\\\"smb: cliente: corregir UAF en descifrado as\u00edncrono\\\"), los canales comenzaron a reutilizar AEAD TFM del canal principal para realizar un descifrado sincr\u00f3nico, pero eso no se puede hacer ya que podr\u00eda haber varios subprocesos cifsd (uno por canal) accediendo simult\u00e1neamente a \u00e9l para realizar el descifrado. Esto corrige el siguiente splat de KASAN al ejecutar fstest generic/249 con \u0027vers=3.1.1,multichannel,max_channels=4,seal\u0027 en Windows Server 2022: ERROR: KASAN: slab-use-after-free en gf128mul_4k_lle+0xba/0x110 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff8881046c18a0 por la tarea cifsd/986 CPU: 3 UID: 0 PID: 986 Comm: cifsd No contaminado 6.15.0-rc1 #1 PREEMPT(voluntario) Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41 01/04/2014 Seguimiento de llamadas:   dump_stack_lvl+0x5d/0x80 print_report+0x156/0x528 ? gf128mul_4k_lle+0xba/0x110 ? __virt_addr_valid+0x145/0x300 ? __phys_addr+0x46/0x90 ? gf128mul_4k_lle+0xba/0x110 kasan_report+0xdf/0x1a0 ? gf128mul_4k_lle+0xba/0x110 gf128mul_4k_lle+0xba/0x110 ghash_update+0x189/0x210 shash_ahash_update+0x295/0x370 ? __pfx_shash_ahash_update+0x10/0x10 ? __pfx_shash_ahash_update+0x10/0x10 ? __pfx_extract_iter_to_sg+0x10/0x10 ? ___kmalloc_large_node+0x10e/0x180 ? __asan_memset+0x23/0x50 crypto_ahash_update+0x3c/0xc0 gcm_hash_assoc_remain_continue+0x93/0xc0 crypt_message+0xe09/0xec0 [cifs] ? __pfx_crypt_message+0x10/0x10 [cifs] ? _raw_spin_unlock+0x23/0x40 ? __pfx_cifs_readv_from_socket+0x10/0x10 [cifs] decrypt_raw_data+0x229/0x380 [cifs] ? __pfx_decrypt_raw_data+0x10/0x10 [cifs] ? __pfx_cifs_read_iter_from_socket+0x10/0x10 [cifs] smb3_receive_transform+0x837/0xc80 [cifs] ? __pfx_smb3_receive_transform+0x10/0x10 [cifs] ? __pfx___might_resched+0x10/0x10 ? __pfx_smb3_is_transform_hdr+0x10/0x10 [cifs] cifs_demultiplex_thread+0x692/0x1570 [cifs] ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs] ? rcu_is_watching+0x20/0x50 ? rcu_lockdep_current_cpu_online+0x62/0xb0 ? find_held_lock+0x32/0x90 ? kvm_sched_clock_read+0x11/0x20 ? local_clock_noinstr+0xd/0xd0 ? trace_irq_enable.constprop.0+0xa8/0xe0 ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs] kthread+0x1fe/0x380 ? kthread+0x10f/0x380 ? __pfx_kthread+0x10/0x10 ? local_clock_noinstr+0xd/0xd0 ? ret_from_fork+0x1b/0x60 ? local_clock+0x15/0x30 ? lock_release+0x29b/0x390 ? rcu_is_watching+0x20/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x31/0x60 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30  \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9502dd5c7029902f4a425bf959917a5a9e7c0e50\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/950557922c1298464749c216d8763e97faf5d0a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa5a1e4b882964eb79d5b5d1d1e8a1a5efbb1d15\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e859b216d94668bc66330e61be201234f4413d1a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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