5.5

CVE-2022-49277

jffs2: fix memory leak in jffs2_do_mount_fs

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

jffs2: fix memory leak in jffs2_do_mount_fs

If jffs2_build_filesystem() in jffs2_do_mount_fs() returns an error,
we can observe the following kmemleak report:

--------------------------------------------
unreferenced object 0xffff88811b25a640 (size 64):
  comm "mount", pid 691, jiffies 4294957728 (age 71.952s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffffa493be24>] kmem_cache_alloc_trace+0x584/0x880
    [<ffffffffa5423a06>] jffs2_sum_init+0x86/0x130
    [<ffffffffa5400e58>] jffs2_do_mount_fs+0x798/0xac0
    [<ffffffffa540acf3>] jffs2_do_fill_super+0x383/0xc30
    [<ffffffffa540c00a>] jffs2_fill_super+0x2ea/0x4c0
    [...]
unreferenced object 0xffff88812c760000 (size 65536):
  comm "mount", pid 691, jiffies 4294957728 (age 71.952s)
  hex dump (first 32 bytes):
    bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
    bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
  backtrace:
    [<ffffffffa493a449>] __kmalloc+0x6b9/0x910
    [<ffffffffa5423a57>] jffs2_sum_init+0xd7/0x130
    [<ffffffffa5400e58>] jffs2_do_mount_fs+0x798/0xac0
    [<ffffffffa540acf3>] jffs2_do_fill_super+0x383/0xc30
    [<ffffffffa540c00a>] jffs2_fill_super+0x2ea/0x4c0
    [...]
--------------------------------------------

This is because the resources allocated in jffs2_sum_init() are not
released. Call jffs2_sum_exit() to release these resources to solve
the problem.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.15 < 4.9.311
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.276
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.238
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.189
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.110
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.33
Linux ≫ Linux Kernel Version >= 5.16 < 5.16.19
Linux ≫ Linux Kernel Version >= 5.17 < 5.17.2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.26% 0.172
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
134c704f-9b21-4f2e-91b3-4a467353bcc0 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/0978e9af4559a171ac7a74a1b3ef21804b0a0fa9
Patch
https://git.kernel.org/stable/c/2a9d8184458562e6bf2f40d0e677fc85e2dd3834
Patch
https://git.kernel.org/stable/c/4392e8aeebc5a4f8073620bccba7de1b1f6d7c88
Patch
https://git.kernel.org/stable/c/5f34310d1376ca5b2ed798258def2c2ab3cc6699
Patch
https://git.kernel.org/stable/c/607d3aab7349f18e0d9dba4100d09d16fe27caca
Patch
https://git.kernel.org/stable/c/9a0f6610c7daedd2eace430beeb08a8b7ac80699
Patch
https://git.kernel.org/stable/c/c94128470e6fe53d9bd9d16d2d3271813f9d37af
Patch
https://git.kernel.org/stable/c/d051cef784de4d54835f6b6836d98a8f6935772c
Patch
https://git.kernel.org/stable/c/dbe0d0521eaa6a3d235517319266c539bb5c5112
Patch