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

Message ID 20240403131518.61392-1-warthog618@gmail.com
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Series gpio: cdev: label sanitization fixes | expand

Message

Kent Gibson April 3, 2024, 1:15 p.m. UTC 
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