GHSA-F8FM-XGPR-P643

Vulnerability from github – Published: 2025-10-21 12:31 – Updated: 2025-10-21 12:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix to avoid f2fs_bug_on() in dec_valid_node_count()

As Yanming reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=215897

I have encountered a bug in F2FS file system in kernel v5.17.

The kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can reproduce the bug by running the following commands:

The kernel message is shown below:

kernel BUG at fs/f2fs/f2fs.h:2511! Call Trace: f2fs_remove_inode_page+0x2a2/0x830 f2fs_evict_inode+0x9b7/0x1510 evict+0x282/0x4e0 do_unlinkat+0x33a/0x540 __x64_sys_unlinkat+0x8e/0xd0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae

The root cause is: .total_valid_block_count or .total_valid_node_count could fuzzed to zero, then once dec_valid_node_count() was called, it will cause BUG_ON(), this patch fixes to print warning info and set SBI_NEED_FSCK into CP instead of panic.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2022-49380"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:14Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid f2fs_bug_on() in dec_valid_node_count()\n\nAs Yanming reported in bugzilla:\n\nhttps://bugzilla.kernel.org/show_bug.cgi?id=215897\n\nI have encountered a bug in F2FS file system in kernel v5.17.\n\nThe kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can\nreproduce the bug by running the following commands:\n\nThe kernel message is shown below:\n\nkernel BUG at fs/f2fs/f2fs.h:2511!\nCall Trace:\n f2fs_remove_inode_page+0x2a2/0x830\n f2fs_evict_inode+0x9b7/0x1510\n evict+0x282/0x4e0\n do_unlinkat+0x33a/0x540\n __x64_sys_unlinkat+0x8e/0xd0\n do_syscall_64+0x3b/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe root cause is: .total_valid_block_count or .total_valid_node_count\ncould fuzzed to zero, then once dec_valid_node_count() was called, it\nwill cause BUG_ON(), this patch fixes to print warning info and set\nSBI_NEED_FSCK into CP instead of panic.",
  "id": "GHSA-f8fm-xgpr-p643",
  "modified": "2025-10-21T12:31:25Z",
  "published": "2025-10-21T12:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49380"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2766ddaf45b69252bb8fe526b5b6e56904a9ae7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89d9a48d0cd30429463ea4e37ca83be6773ed5eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bce859358d3d5940aa858e40ceee70ee6e76130e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ccffa99ae6a1f44797b57444c6a80382a42928fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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