ghsa-32j9-8mq4-72ff
Vulnerability from github
Published
2024-10-21 15:32
Modified
2024-10-23 18:33
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

netfs: Delete subtree of 'fs/netfs' when netfs module exits

In netfs_init() or fscache_proc_init(), we create dentry under 'fs/netfs', but in netfs_exit(), we only delete the proc entry of 'fs/netfs' without deleting its subtree. This triggers the following WARNING:

================================================================== remove_proc_entry: removing non-empty directory 'fs/netfs', leaking at least 'requests' WARNING: CPU: 4 PID: 566 at fs/proc/generic.c:717 remove_proc_entry+0x160/0x1c0 Modules linked in: netfs(-) CPU: 4 UID: 0 PID: 566 Comm: rmmod Not tainted 6.11.0-rc3 #860 RIP: 0010:remove_proc_entry+0x160/0x1c0 Call Trace: netfs_exit+0x12/0x620 [netfs] __do_sys_delete_module.isra.0+0x14c/0x2e0 do_syscall_64+0x4b/0x110 entry_SYSCALL_64_after_hwframe+0x76/0x7e ==================================================================

Therefore use remove_proc_subtree() instead of remove_proc_entry() to fix the above problem.

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{
   affected: [],
   aliases: [
      "CVE-2024-47733",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-772",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2024-10-21T13:15:03Z",
      severity: "MODERATE",
   },
   details: "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Delete subtree of 'fs/netfs' when netfs module exits\n\nIn netfs_init() or fscache_proc_init(), we create dentry under 'fs/netfs',\nbut in netfs_exit(), we only delete the proc entry of 'fs/netfs' without\ndeleting its subtree. This triggers the following WARNING:\n\n==================================================================\nremove_proc_entry: removing non-empty directory 'fs/netfs', leaking at least 'requests'\nWARNING: CPU: 4 PID: 566 at fs/proc/generic.c:717 remove_proc_entry+0x160/0x1c0\nModules linked in: netfs(-)\nCPU: 4 UID: 0 PID: 566 Comm: rmmod Not tainted 6.11.0-rc3 #860\nRIP: 0010:remove_proc_entry+0x160/0x1c0\nCall Trace:\n <TASK>\n netfs_exit+0x12/0x620 [netfs]\n __do_sys_delete_module.isra.0+0x14c/0x2e0\n do_syscall_64+0x4b/0x110\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n==================================================================\n\nTherefore use remove_proc_subtree() instead of remove_proc_entry() to\nfix the above problem.",
   id: "GHSA-32j9-8mq4-72ff",
   modified: "2024-10-23T18:33:07Z",
   published: "2024-10-21T15:32:26Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2024-47733",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/3c58a9575e02c2b90a3180007d57105ceaa7c246",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/603f95cefbee06a31b03137b777f03e3c2163d72",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/7a9eaf97d56625e55b31a7beb558e1ee185ca461",
      },
   ],
   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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