CVE-2024-53218
Vulnerability from cvelistv5
Published
2024-12-27 13:50
Modified
2024-12-27 13:50
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix race in concurrent f2fs_stop_gc_thread In my test case, concurrent calls to f2fs shutdown report the following stack trace: Oops: general protection fault, probably for non-canonical address 0xc6cfff63bb5513fc: 0000 [#1] PREEMPT SMP PTI CPU: 0 UID: 0 PID: 678 Comm: f2fs_rep_shutdo Not tainted 6.12.0-rc5-next-20241029-g6fb2fa9805c5-dirty #85 Call Trace: <TASK> ? show_regs+0x8b/0xa0 ? __die_body+0x26/0xa0 ? die_addr+0x54/0x90 ? exc_general_protection+0x24b/0x5c0 ? asm_exc_general_protection+0x26/0x30 ? kthread_stop+0x46/0x390 f2fs_stop_gc_thread+0x6c/0x110 f2fs_do_shutdown+0x309/0x3a0 f2fs_ioc_shutdown+0x150/0x1c0 __f2fs_ioctl+0xffd/0x2ac0 f2fs_ioctl+0x76/0xe0 vfs_ioctl+0x23/0x60 __x64_sys_ioctl+0xce/0xf0 x64_sys_call+0x2b1b/0x4540 do_syscall_64+0xa7/0x240 entry_SYSCALL_64_after_hwframe+0x76/0x7e The root cause is a race condition in f2fs_stop_gc_thread() called from different f2fs shutdown paths: [CPU0] [CPU1] ---------------------- ----------------------- f2fs_stop_gc_thread f2fs_stop_gc_thread gc_th = sbi->gc_thread gc_th = sbi->gc_thread kfree(gc_th) sbi->gc_thread = NULL < gc_th != NULL > kthread_stop(gc_th->f2fs_gc_task) //UAF The commit c7f114d864ac ("f2fs: fix to avoid use-after-free in f2fs_stop_gc_thread()") attempted to fix this issue by using a read semaphore to prevent races between shutdown and remount threads, but it fails to prevent all race conditions. Fix it by converting to write lock of s_umount in f2fs_do_shutdown().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60457ed6c67625c87861f96912b4179dc2293896
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/794fa8792d4eacac191f1cbcc2e81b7369e4662a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b0033dbc48340a1c1c3f12448ba17d6587ca092
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c631207897a9b3d41167ceca58e07f8f94720e42
Impacted products
Vendor Product Version
Linux Linux Version: 4.16
Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "794fa8792d4eacac191f1cbcc2e81b7369e4662a",
              "status": "affected",
              "version": "7950e9ac638e84518fbdd5c930939ad46a1068c5",
              "versionType": "git"
            },
            {
              "lessThan": "60457ed6c67625c87861f96912b4179dc2293896",
              "status": "affected",
              "version": "7950e9ac638e84518fbdd5c930939ad46a1068c5",
              "versionType": "git"
            },
            {
              "lessThan": "c631207897a9b3d41167ceca58e07f8f94720e42",
              "status": "affected",
              "version": "7950e9ac638e84518fbdd5c930939ad46a1068c5",
              "versionType": "git"
            },
            {
              "lessThan": "7b0033dbc48340a1c1c3f12448ba17d6587ca092",
              "status": "affected",
              "version": "7950e9ac638e84518fbdd5c930939ad46a1068c5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.16"
            },
            {
              "lessThan": "4.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix race in concurrent f2fs_stop_gc_thread\n\nIn my test case, concurrent calls to f2fs shutdown report the following\nstack trace:\n\n Oops: general protection fault, probably for non-canonical address 0xc6cfff63bb5513fc: 0000 [#1] PREEMPT SMP PTI\n CPU: 0 UID: 0 PID: 678 Comm: f2fs_rep_shutdo Not tainted 6.12.0-rc5-next-20241029-g6fb2fa9805c5-dirty #85\n Call Trace:\n  \u003cTASK\u003e\n  ? show_regs+0x8b/0xa0\n  ? __die_body+0x26/0xa0\n  ? die_addr+0x54/0x90\n  ? exc_general_protection+0x24b/0x5c0\n  ? asm_exc_general_protection+0x26/0x30\n  ? kthread_stop+0x46/0x390\n  f2fs_stop_gc_thread+0x6c/0x110\n  f2fs_do_shutdown+0x309/0x3a0\n  f2fs_ioc_shutdown+0x150/0x1c0\n  __f2fs_ioctl+0xffd/0x2ac0\n  f2fs_ioctl+0x76/0xe0\n  vfs_ioctl+0x23/0x60\n  __x64_sys_ioctl+0xce/0xf0\n  x64_sys_call+0x2b1b/0x4540\n  do_syscall_64+0xa7/0x240\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nThe root cause is a race condition in f2fs_stop_gc_thread() called from\ndifferent f2fs shutdown paths:\n\n  [CPU0]                       [CPU1]\n  ----------------------       -----------------------\n  f2fs_stop_gc_thread          f2fs_stop_gc_thread\n                                 gc_th = sbi-\u003egc_thread\n    gc_th = sbi-\u003egc_thread\n    kfree(gc_th)\n    sbi-\u003egc_thread = NULL\n                                 \u003c gc_th != NULL \u003e\n                                 kthread_stop(gc_th-\u003ef2fs_gc_task) //UAF\n\nThe commit c7f114d864ac (\"f2fs: fix to avoid use-after-free in\nf2fs_stop_gc_thread()\") attempted to fix this issue by using a read\nsemaphore to prevent races between shutdown and remount threads, but\nit fails to prevent all race conditions.\n\nFix it by converting to write lock of s_umount in f2fs_do_shutdown()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-27T13:50:03.556Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/794fa8792d4eacac191f1cbcc2e81b7369e4662a"
        },
        {
          "url": "https://git.kernel.org/stable/c/60457ed6c67625c87861f96912b4179dc2293896"
        },
        {
          "url": "https://git.kernel.org/stable/c/c631207897a9b3d41167ceca58e07f8f94720e42"
        },
        {
          "url": "https://git.kernel.org/stable/c/7b0033dbc48340a1c1c3f12448ba17d6587ca092"
        }
      ],
      "title": "f2fs: fix race in concurrent f2fs_stop_gc_thread",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-53218",
    "datePublished": "2024-12-27T13:50:03.556Z",
    "dateReserved": "2024-11-19T17:17:25.024Z",
    "dateUpdated": "2024-12-27T13:50:03.556Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-53218\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T14:15:29.840\",\"lastModified\":\"2024-12-27T14:15:29.840\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix race in concurrent f2fs_stop_gc_thread\\n\\nIn my test case, concurrent calls to f2fs shutdown report the following\\nstack trace:\\n\\n Oops: general protection fault, probably for non-canonical address 0xc6cfff63bb5513fc: 0000 [#1] PREEMPT SMP PTI\\n CPU: 0 UID: 0 PID: 678 Comm: f2fs_rep_shutdo Not tainted 6.12.0-rc5-next-20241029-g6fb2fa9805c5-dirty #85\\n Call Trace:\\n  \u003cTASK\u003e\\n  ? show_regs+0x8b/0xa0\\n  ? __die_body+0x26/0xa0\\n  ? die_addr+0x54/0x90\\n  ? exc_general_protection+0x24b/0x5c0\\n  ? asm_exc_general_protection+0x26/0x30\\n  ? kthread_stop+0x46/0x390\\n  f2fs_stop_gc_thread+0x6c/0x110\\n  f2fs_do_shutdown+0x309/0x3a0\\n  f2fs_ioc_shutdown+0x150/0x1c0\\n  __f2fs_ioctl+0xffd/0x2ac0\\n  f2fs_ioctl+0x76/0xe0\\n  vfs_ioctl+0x23/0x60\\n  __x64_sys_ioctl+0xce/0xf0\\n  x64_sys_call+0x2b1b/0x4540\\n  do_syscall_64+0xa7/0x240\\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n\\nThe root cause is a race condition in f2fs_stop_gc_thread() called from\\ndifferent f2fs shutdown paths:\\n\\n  [CPU0]                       [CPU1]\\n  ----------------------       -----------------------\\n  f2fs_stop_gc_thread          f2fs_stop_gc_thread\\n                                 gc_th = sbi-\u003egc_thread\\n    gc_th = sbi-\u003egc_thread\\n    kfree(gc_th)\\n    sbi-\u003egc_thread = NULL\\n                                 \u003c gc_th != NULL \u003e\\n                                 kthread_stop(gc_th-\u003ef2fs_gc_task) //UAF\\n\\nThe commit c7f114d864ac (\\\"f2fs: fix to avoid use-after-free in\\nf2fs_stop_gc_thread()\\\") attempted to fix this issue by using a read\\nsemaphore to prevent races between shutdown and remount threads, but\\nit fails to prevent all race conditions.\\n\\nFix it by converting to write lock of s_umount in f2fs_do_shutdown().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/60457ed6c67625c87861f96912b4179dc2293896\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/794fa8792d4eacac191f1cbcc2e81b7369e4662a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7b0033dbc48340a1c1c3f12448ba17d6587ca092\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c631207897a9b3d41167ceca58e07f8f94720e42\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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