CVE-2024-56625

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

can: dev: can_set_termination(): allow sleeping GPIOs

In commit 6e86a1543c37 (can: dev: provide optional GPIO based termination support) GPIO based termination support was added.

For no particular reason that patch uses gpiod_set_value() to set the GPIO. This leads to the following warning, if the systems uses a sleeping GPIO, i.e. behind an I2C port expander:

| WARNING: CPU: 0 PID: 379 at /drivers/gpio/gpiolib.c:3496 gpiod_set_value+0x50/0x6c | CPU: 0 UID: 0 PID: 379 Comm: ip Not tainted 6.11.0-20241016-1 #1 823affae360cc91126e4d316d7a614a8bf86236c

Replace gpiod_set_value() by gpiod_set_value_cansleep() to allow the use of sleeping GPIOs.

Affected Software

References

• https://git.kernel.org/stable/c/1ac442f25c19953d2f33b92549628b0aeac83db6
• https://git.kernel.org/stable/c/3b0c5bb437d31a9864f633b85cbc42d2f6c51c96
• https://git.kernel.org/stable/c/46637a608fb1ee871a0ad8bf70d917d5d95ac251
• https://git.kernel.org/stable/c/ee1dfbdd8b4b6de85e96ae2059dc9c1bdb6b49b5
• https://git.kernel.org/stable/c/faa0a1975a6fbce30616775216606eb8d6388ea1