Bug 2363449 (CVE-2022-49832)

Summary: CVE-2022-49832 kernel: pinctrl: devicetree: fix null pointer dereferencing in pinctrl_dt_to_map
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2025-05-01 15:05:08 UTC 
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.
Comment 1 Avinash Hanwate 2025-05-02 06:20:51 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050137-CVE-2022-49832-d04a@gregkh/T