5.5

CVE-2022-50076

cifs: Fix memory leak on the deferred close

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

cifs: Fix memory leak on the deferred close

xfstests on smb21 report kmemleak as below:

  unreferenced object 0xffff8881767d6200 (size 64):
    comm "xfs_io", pid 1284, jiffies 4294777434 (age 20.789s)
    hex dump (first 32 bytes):
      80 5a d0 11 81 88 ff ff 78 8a aa 63 81 88 ff ff  .Z......x..c....
      00 71 99 76 81 88 ff ff 00 00 00 00 00 00 00 00  .q.v............
    backtrace:
      [<00000000ad04e6ea>] cifs_close+0x92/0x2c0
      [<0000000028b93c82>] __fput+0xff/0x3f0
      [<00000000d8116851>] task_work_run+0x85/0xc0
      [<0000000027e14f9e>] do_exit+0x5e5/0x1240
      [<00000000fb492b95>] do_group_exit+0x58/0xe0
      [<00000000129a32d9>] __x64_sys_exit_group+0x28/0x30
      [<00000000e3f7d8e9>] do_syscall_64+0x35/0x80
      [<00000000102e8a0b>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

When cancel the deferred close work, we should also cleanup the struct
cifs_deferred_close.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.13.12 < 5.14
Linux ≫ Linux Kernel Version >= 5.14.1 < 5.15.63
Linux ≫ Linux Kernel Version >= 5.16 < 5.19.4
Linux ≫ Linux Kernel Version5.14 Update-
Linux ≫ Linux Kernel Version5.14 Updaterc6
Linux ≫ Linux Kernel Version5.14 Updaterc7
Linux ≫ Linux Kernel Version6.0 Updaterc1
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.053
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://git.kernel.org/stable/c/860efae127888ae535bc4eda1b7f27642727c69e
Patch
https://git.kernel.org/stable/c/60b6d38add7b9c17d6e5d49ee8e930ea1a5650c5
Patch
https://git.kernel.org/stable/c/ca08d0eac020d48a3141dbec0a3cf64fbdb17cde
Patch