CVE-2025-21783 Information

Description

In the Linux kernel the following vulnerability has been resolved:

gpiolib: Fix crash on error in gpiochip_get_ngpios()

The gpiochip_get_ngpios() uses chip_() macros to print messages. However these macros rely on gpiodev to be initialised and set which is not the case when called via bgpio_init(). In such a case the printing messages will crash on NULL pointer dereference. Replace chip_() macros by the respective dev_() ones to avoid such crash.

Reference

https://git.kernel.org/stable/c/189fb76215e479c10731baabb50f1a352d2078f5 https://git.kernel.org/stable/c/4d9b2b62e1136d10f661ec4c0c268140b6f74f4f https://git.kernel.org/stable/c/7b4aebeecbbd5b5fe73e35fad3f62ed21aa7ef44 https://git.kernel.org/stable/c/a7052afa9eae2239e25943baa8817a6a56e8aa68