{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-53218",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-53218"
  ],
  "published": "2024-12-27T13:53:01Z",
  "summary": "f2fs: fix race in concurrent f2fs_stop_gc_thread",
  "details": "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  <TASK>\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->gc_thread\n    gc_th = sbi->gc_thread\n    kfree(gc_th)\n    sbi->gc_thread = NULL\n                                 < gc_th != NULL >\n                                 kthread_stop(gc_th->f2fs_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().",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-53218"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/794fa8792d4eacac191f1cbcc2e81b7369e4662a"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/60457ed6c67625c87861f96912b4179dc2293896"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c631207897a9b3d41167ceca58e07f8f94720e42"
    },
    {
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    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
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