diff options
| author | Ian Forbes <ian.forbes@broadcom.com> | 2024-08-08 15:06:34 -0500 |
|---|---|---|
| committer | Zack Rusin <zack.rusin@broadcom.com> | 2024-10-10 14:27:01 -0400 |
| commit | 28a5dfd4f615539fb22fb6d5c219c199c14e6eb6 (patch) | |
| tree | 184209a0d0b3f971403c9804965e0f4d10b8f5d6 | |
| parent | fcddc71ec7ecf15b4df3c41288c9cf0b8e886111 (diff) | |
drm/vmwgfx: Limit display layout ioctl array size to VMWGFX_NUM_DISPLAY_UNITS
Currently the array size is only limited by the largest kmalloc size which
is incorrect. This change will also return a more specific error message
than ENOMEM to userspace.
Signed-off-by: Ian Forbes <ian.forbes@broadcom.com>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Reviewed-by: Martin Krastev <martin.krastev@broadcom.com>
Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240808200634.1074083-1-ian.forbes@broadcom.com
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_kms.h | 3 |
3 files changed, 5 insertions, 6 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index 3f4719b3c268..4e2807f5f94c 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -62,7 +62,7 @@ #define VMWGFX_DRIVER_MINOR 20 #define VMWGFX_DRIVER_PATCHLEVEL 0 #define VMWGFX_FIFO_STATIC_SIZE (1024*1024) -#define VMWGFX_MAX_DISPLAYS 16 +#define VMWGFX_NUM_DISPLAY_UNITS 8 #define VMWGFX_CMD_BOUNCE_INIT_SIZE 32768 #define VMWGFX_MIN_INITIAL_WIDTH 1280 @@ -82,7 +82,7 @@ #define VMWGFX_NUM_GB_CONTEXT 256 #define VMWGFX_NUM_GB_SHADER 20000 #define VMWGFX_NUM_GB_SURFACE 32768 -#define VMWGFX_NUM_GB_SCREEN_TARGET VMWGFX_MAX_DISPLAYS +#define VMWGFX_NUM_GB_SCREEN_TARGET VMWGFX_NUM_DISPLAY_UNITS #define VMWGFX_NUM_DXCONTEXT 256 #define VMWGFX_NUM_DXQUERY 512 #define VMWGFX_NUM_MOB (VMWGFX_NUM_GB_CONTEXT +\ diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 288ed0bb75cb..884804274dfb 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -2225,7 +2225,7 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, struct drm_mode_config *mode_config = &dev->mode_config; struct drm_vmw_update_layout_arg *arg = (struct drm_vmw_update_layout_arg *)data; - void __user *user_rects; + const void __user *user_rects; struct drm_vmw_rect *rects; struct drm_rect *drm_rects; unsigned rects_size; @@ -2237,6 +2237,8 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, VMWGFX_MIN_INITIAL_HEIGHT}; vmw_du_update_layout(dev_priv, 1, &def_rect); return 0; + } else if (arg->num_outputs > VMWGFX_NUM_DISPLAY_UNITS) { + return -E2BIG; } rects_size = arg->num_outputs * sizeof(struct drm_vmw_rect); diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h index 6141fadf81ef..2a6c6d6581e0 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h @@ -199,9 +199,6 @@ struct vmw_kms_dirty { s32 unit_y2; }; -#define VMWGFX_NUM_DISPLAY_UNITS 8 - - #define vmw_framebuffer_to_vfb(x) \ container_of(x, struct vmw_framebuffer, base) #define vmw_framebuffer_to_vfbs(x) \ |