FKIE_CVE-2023-54077

Vulnerability from fkie_nvd - Published: 2025-12-24 13:16 - Updated: 2025-12-24 13:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix memory leak if ntfs_read_mft failed Label ATTR_ROOT in ntfs_read_mft() sets is_root = true and ni->ni_flags |= NI_FLAG_DIR, then next attr will goto label ATTR_ALLOC and alloc ni->dir.alloc_run. However two states are not always consistent and can make memory leak. 1) attr_name in ATTR_ROOT does not fit the condition it will set is_root = true but NI_FLAG_DIR is not set. 2) next attr_name in ATTR_ALLOC fits the condition and alloc ni->dir.alloc_run 3) in cleanup function ni_clear(), when NI_FLAG_DIR is set, it frees ni->dir.alloc_run, otherwise it frees ni->file.run 4) because NI_FLAG_DIR is not set in this case, ni->dir.alloc_run is leaked as kmemleak reported: unreferenced object 0xffff888003bc5480 (size 64): backtrace: [<000000003d42e6b0>] __kmalloc_node+0x4e/0x1c0 [<00000000d8e19b8a>] kvmalloc_node+0x39/0x1f0 [<00000000fc3eb5b8>] run_add_entry+0x18a/0xa40 [ntfs3] [<0000000011c9f978>] run_unpack+0x75d/0x8e0 [ntfs3] [<00000000e7cf1819>] run_unpack_ex+0xbc/0x500 [ntfs3] [<00000000bbf0a43d>] ntfs_iget5+0xb25/0x2dd0 [ntfs3] [<00000000a6e50693>] ntfs_fill_super+0x218d/0x3580 [ntfs3] [<00000000b9170608>] get_tree_bdev+0x3fb/0x710 [<000000004833798a>] vfs_get_tree+0x8e/0x280 [<000000006e20b8e6>] path_mount+0xf3c/0x1930 [<000000007bf15a5f>] do_mount+0xf3/0x110 ... Fix this by always setting is_root and NI_FLAG_DIR together.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bc6bb657dfb0ab3b94ef6d477ca241bf7b6ec06
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3030f2b9b3329db3948c1a145a5493ca6f617d50
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3bb0d3eb475f01744ce6d6e998dfbd80220852a1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93bf79f989688852deade1550fb478b0a4d8daa8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfa434c60157c9793e9b12c9b68ade02aff9f803
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix memory leak if ntfs_read_mft failed\n\nLabel ATTR_ROOT in ntfs_read_mft() sets is_root = true and\nni-\u003eni_flags |= NI_FLAG_DIR, then next attr will goto label ATTR_ALLOC\nand alloc ni-\u003edir.alloc_run. However two states are not always\nconsistent and can make memory leak.\n\n 1) attr_name in ATTR_ROOT does not fit the condition it will set\n is_root = true but NI_FLAG_DIR is not set.\n 2) next attr_name in ATTR_ALLOC fits the condition and alloc\n ni-\u003edir.alloc_run\n 3) in cleanup function ni_clear(), when NI_FLAG_DIR is set, it frees\n ni-\u003edir.alloc_run, otherwise it frees ni-\u003efile.run\n 4) because NI_FLAG_DIR is not set in this case, ni-\u003edir.alloc_run is\n leaked as kmemleak reported:\n\nunreferenced object 0xffff888003bc5480 (size 64):\n  backtrace:\n    [\u003c000000003d42e6b0\u003e] __kmalloc_node+0x4e/0x1c0\n    [\u003c00000000d8e19b8a\u003e] kvmalloc_node+0x39/0x1f0\n    [\u003c00000000fc3eb5b8\u003e] run_add_entry+0x18a/0xa40 [ntfs3]\n    [\u003c0000000011c9f978\u003e] run_unpack+0x75d/0x8e0 [ntfs3]\n    [\u003c00000000e7cf1819\u003e] run_unpack_ex+0xbc/0x500 [ntfs3]\n    [\u003c00000000bbf0a43d\u003e] ntfs_iget5+0xb25/0x2dd0 [ntfs3]\n    [\u003c00000000a6e50693\u003e] ntfs_fill_super+0x218d/0x3580 [ntfs3]\n    [\u003c00000000b9170608\u003e] get_tree_bdev+0x3fb/0x710\n    [\u003c000000004833798a\u003e] vfs_get_tree+0x8e/0x280\n    [\u003c000000006e20b8e6\u003e] path_mount+0xf3c/0x1930\n    [\u003c000000007bf15a5f\u003e] do_mount+0xf3/0x110\n    ...\n\nFix this by always setting is_root and NI_FLAG_DIR together."
    }
  ],
  "id": "CVE-2023-54077",
  "lastModified": "2025-12-24T13:16:09.543",
  "metrics": {},
  "published": "2025-12-24T13:16:09.543",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1bc6bb657dfb0ab3b94ef6d477ca241bf7b6ec06"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3030f2b9b3329db3948c1a145a5493ca6f617d50"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3bb0d3eb475f01744ce6d6e998dfbd80220852a1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/93bf79f989688852deade1550fb478b0a4d8daa8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bfa434c60157c9793e9b12c9b68ade02aff9f803"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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