On Thu, Apr 4, 2024 at 11:33 AM Bartosz Golaszewski brgl@bgdev.pl wrote:
From: Bartosz Golaszewski bartosz.golaszewski@linaro.org
We need to take into account that a line's consumer label may be NULL and not try to kstrdup() it in that case but rather pass the NULL pointer up the stack to the interrupt request function.
To that end: let make_irq_label() return NULL as a valid return value and use ERR_PTR() instead to signal an allocation failure to callers.
Cc: stable@vger.kernel.org Fixes: b34490879baa ("gpio: cdev: sanitize the label before requesting the interrupt") Reported-by: Linux Kernel Functional Testing lkft@linaro.org Closes: https://lore.kernel.org/lkml/20240402093534.212283-1-naresh.kamboju@linaro.o... Signed-off-by: Bartosz Golaszewski bartosz.golaszewski@linaro.org
Tested-by: Anders Roxell anders.roxell@linaro.org