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| author | Kent Gibson <warthog618@gmail.com> | 2023-12-21 09:20:36 +0800 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-12-21 10:27:07 +0100 |
| commit | 1d656bd259edb89dc1d9938ec5c5389867088546 (patch) | |
| tree | d44fb2a19a04fdea90885e519d452edfba908b2d /drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c | |
| parent | ceb6a6f023fd3e8b07761ed900352ef574010bcb (diff) | |
gpiolib: cdev: add gpio_device locking wrapper around gpio_ioctl()
While the GPIO cdev gpio_ioctl() call is in progress, the kernel can
call gpiochip_remove() which will set gdev->chip to NULL, after which
any subsequent access will cause a crash.
gpio_ioctl() was overlooked by the previous fix to protect syscalls
(bdbbae241a04), so add protection for that.
Fixes: bdbbae241a04 ("gpiolib: protect the GPIO device against being dropped while in use by user-space")
Fixes: d7c51b47ac11 ("gpio: userspace ABI for reading/writing GPIO lines")
Fixes: 3c0d9c635ae2 ("gpiolib: cdev: support GPIO_V2_GET_LINE_IOCTL and GPIO_V2_LINE_GET_VALUES_IOCTL")
Fixes: aad955842d1c ("gpiolib: cdev: support GPIO_V2_GET_LINEINFO_IOCTL and GPIO_V2_GET_LINEINFO_WATCH_IOCTL")
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c')
0 files changed, 0 insertions, 0 deletions