diff options
| author | Luka Pivk <luka.pivk@toradex.com> | 2019-01-08 07:02:41 +0100 |
|---|---|---|
| committer | Luka Pivk <luka.pivk@toradex.com> | 2019-01-08 07:02:41 +0100 |
| commit | 43f61e8df71c474cd56b5c971096b9cf8d36cd95 (patch) | |
| tree | 0031be65fcc2fd2fd3eceeee9558b5526a19e431 /drivers/gpu/drm/drm_ioctl.c | |
| parent | 5656ec50dc9950db865d53306326b1a732e3738e (diff) | |
| parent | c04c050f5bf98845bfe22164b8a1503d696a6e26 (diff) | |
Merge remote-tracking branch 'remotes/origin/linux-4.19.y'toradex_4.19.y
Signed-off-by: Luka Pivk <luka.pivk@toradex.com>
Diffstat (limited to 'drivers/gpu/drm/drm_ioctl.c')
| -rw-r--r-- | drivers/gpu/drm/drm_ioctl.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index ea10e9a26aad..ba129b64b61f 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -37,6 +37,7 @@ #include <linux/pci.h> #include <linux/export.h> +#include <linux/nospec.h> /** * DOC: getunique and setversion story @@ -794,13 +795,17 @@ long drm_ioctl(struct file *filp, if (is_driver_ioctl) { /* driver ioctl */ - if (nr - DRM_COMMAND_BASE >= dev->driver->num_ioctls) + unsigned int index = nr - DRM_COMMAND_BASE; + + if (index >= dev->driver->num_ioctls) goto err_i1; - ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; + index = array_index_nospec(index, dev->driver->num_ioctls); + ioctl = &dev->driver->ioctls[index]; } else { /* core ioctl */ if (nr >= DRM_CORE_IOCTL_COUNT) goto err_i1; + nr = array_index_nospec(nr, DRM_CORE_IOCTL_COUNT); ioctl = &drm_ioctls[nr]; } @@ -882,6 +887,7 @@ bool drm_ioctl_flags(unsigned int nr, unsigned int *flags) if (nr >= DRM_CORE_IOCTL_COUNT) return false; + nr = array_index_nospec(nr, DRM_CORE_IOCTL_COUNT); *flags = drm_ioctls[nr].flags; return true; |