5.5

CVE-2022-50282

chardev: fix error handling in cdev_device_add()

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

chardev: fix error handling in cdev_device_add()

While doing fault injection test, I got the following report:

------------[ cut here ]------------
kobject: '(null)' (0000000039956980): is not initialized, yet kobject_put() is being called.
WARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0
CPU: 3 PID: 6306 Comm: 283 Tainted: G        W          6.1.0-rc2-00005-g307c1086d7c9 #1253
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:kobject_put+0x23d/0x4e0
Call Trace:
 <TASK>
 cdev_device_add+0x15e/0x1b0
 __iio_device_register+0x13b4/0x1af0 [industrialio]
 __devm_iio_device_register+0x22/0x90 [industrialio]
 max517_probe+0x3d8/0x6b4 [max517]
 i2c_device_probe+0xa81/0xc00

When device_add() is injected fault and returns error, if dev->devt is not set,
cdev_add() is not called, cdev_del() is not needed. Fix this by checking dev->devt
in error path.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.16.83 < 3.17
Linux ≫ Linux Kernel Version >= 4.4.224 < 4.5
Linux ≫ Linux Kernel Version >= 4.9.224 < 4.9.337
Linux ≫ Linux Kernel Version >= 4.12 < 4.14.303
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.270
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.229
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.163
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.86
Linux ≫ Linux Kernel Version >= 5.16 < 6.0.16
Linux ≫ Linux Kernel Version >= 6.1 < 6.1.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.065
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-908 Use of Uninitialized Resource

The product uses or accesses a resource that has not been initialized.

https://git.kernel.org/stable/c/5d2146889fad4cb9e6c13e790d4cfd871486eca8
Patch
https://git.kernel.org/stable/c/6acf8597c5b04f455ee0649e11e5f3bcd28f381e
Patch
https://git.kernel.org/stable/c/34d17b39bceef25e4cf9805cd59250ae05d0a139
Patch
https://git.kernel.org/stable/c/d85b5247a79355b8432bfd9ac871f96117f750d4
Patch
https://git.kernel.org/stable/c/c46db6088bccff5115674d583fef46ede80077a2
Patch
https://git.kernel.org/stable/c/28dc61cc49c6e995121c6d86bef4b73df78dda80
Patch
https://git.kernel.org/stable/c/b5de1eac71fec1af7723f1083d23a24789fd795c
Patch
https://git.kernel.org/stable/c/85a5660491b507d33662b8e81c142e6041e642eb
Patch
https://git.kernel.org/stable/c/11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797
Patch