On Thursday, June 23, 2016 3:28:25 AM CEST Ville Syrjälä wrote: > On Wed, Jun 22, 2016 at 02:37:11PM +0200, Arnd Bergmann wrote: > > When building with CONFIG_UBSAN_SANITIZE_ALL on ARM, I get this > > gcc warning for atyfb: > > > > drivers/video/fbdev/aty/atyfb_base.c: In function 'aty_bl_update_status': > > drivers/video/fbdev/aty/atyfb_base.c:167:33: warning: array subscript is above array bounds [-Warray-bounds] > > drivers/video/fbdev/aty/atyfb_base.c:152:26: warning: array subscript is above array bounds [-Warray-bounds] > > > > Apparently the warning is correct and there is indeed an overflow, > > Nope. All the LCD register indexes on the Rage LT (the only relevant > chip for this code path) should stay below the table size. At least > I can't see any place where we'd walk past the end. I don't understand what you mean: the warning is about LCD_MISC_CNTL, which is defined as 0x14, while the array size is 9 and that is smaller. Is there something more subtle going on than what gcc sees? Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
