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-rw-r--r--drivers/video/fbdev/core/fbmem.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 71fb710f1ce3..7420d2c16e47 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -962,6 +962,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
struct fb_var_screeninfo old_var;
struct fb_videomode mode;
struct fb_event event;
+ u32 unused;
if (var->activate & FB_ACTIVATE_INV_MODE) {
struct fb_videomode mode1, mode2;
@@ -1008,6 +1009,11 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
if (var->xres < 8 || var->yres < 8)
return -EINVAL;
+ /* Too huge resolution causes multiplication overflow. */
+ if (check_mul_overflow(var->xres, var->yres, &unused) ||
+ check_mul_overflow(var->xres_virtual, var->yres_virtual, &unused))
+ return -EINVAL;
+
ret = info->fbops->fb_check_var(var, info);
if (ret)