[PATCH 0/2] gpio: cdev: label sanitization fixes

Kent Gibson
2024-04-03T13:15:35Z

This series fixes a couple of bugs in the sanitization of labels
being passed to irq.

Patch 1 fixes a missed path in the sanitization changes that can result
in memory corruption.

Patch 2 fixes the case where userspace provides empty labels.

I've placed my Patch 1 before Bart's Patch 2 as it has to relocate
make_irq_label() and free_irq_label(), while Bart's patch modifies
them. This order keeps the patch sizes minimal and the attribution
where it belongs. Patch 2 has been very lightly modified to rebase it
onto Patch 1, including extending it to cover the modified error
return for the debounce_setup() case.

Cheers,
Kent.

Bartosz Golaszewski (1):
gpio: cdev: check for NULL labels when sanitizing them for irqs

Kent Gibson (1):
gpio: cdev: fix missed label sanitizing in debounce_setup()

drivers/gpio/gpiolib-cdev.c | 48 ++++++++++++++++++++++++-------------
1 file changed, 32 insertions(+), 16 deletions(-)

base-commit: 782f4e47ffc19622bf80b3c0cf9cadd2b0b9a644
--
2.39.2