CVE-2022-49832 Information

Description

In the Linux kernel the following vulnerability has been resolved:

pinctrl: devicetree: fix null pointer dereferencing in pinctrl_dt_to_map

Here is the BUG report by KASAN about null pointer dereference:

BUG: KASAN: null-ptr-deref in strcmp+0x2e/0x50 Read of size 1 at addr 0000000000000000 by task python3/2640 Call Trace: strcmp __of_find_property of_find_property pinctrl_dt_to_map

kasprintf() would return NULL pointer when kmalloc() fail to allocate. So directly return ENOMEM if kasprintf() return NULL pointer.

Reference

https://git.kernel.org/stable/c/040f726fecd88121f3b95e70369785ad452dddf9 https://git.kernel.org/stable/c/5834a3a98cd266ad35a229923c0adbd0addc8d68 https://git.kernel.org/stable/c/777430aa4ddccaa5accec6db90ffc1d47f00d471 https://git.kernel.org/stable/c/91d5c5060ee24fe8da88cd585bb43b843d2f0dce https://git.kernel.org/stable/c/97e5b508e96176f1a73888ed89df396d7041bfcb https://git.kernel.org/stable/c/a988dcd3dd9e691c5ccc3324b209688f3b5453e9 https://git.kernel.org/stable/c/aaf552c5d53abe4659176e099575fe870d2e4768 https://git.kernel.org/stable/c/b4d9f55cd38435358bc16d580612bc0d798d7b4c