Re: [Intel-gfx] drm_modes: signed integer overflow

2020-10-23 Thread Simon Ser
On Friday, October 23, 2020 5:27 PM, Ville Syrjälä wrote: > These are two extreme cases: Thanks! > > I'm trying to get > > a fix for my user-space 1, and I'm wondering if int32_t is enough > > after dividing by mode->htotal. > > CC Pekka, just FYI (I think Weston has similar code). > > What's

Re: [Intel-gfx] drm_modes: signed integer overflow

2020-10-23 Thread Ville Syrjälä
On Fri, Oct 23, 2020 at 03:14:20PM +, Simon Ser wrote: > On Thursday, October 22, 2020 12:14 PM, Ville Syrjälä > wrote: > > > On Wed, Oct 21, 2020 at 08:13:43PM -0700, Randy Dunlap wrote: > > > > > Hi, > > > With linux-next 20201021, when booting up, I am seeing this: > > > [ 0.560896] UBSAN

Re: [Intel-gfx] drm_modes: signed integer overflow

2020-10-23 Thread Simon Ser
On Thursday, October 22, 2020 12:14 PM, Ville Syrjälä wrote: > On Wed, Oct 21, 2020 at 08:13:43PM -0700, Randy Dunlap wrote: > > > Hi, > > With linux-next 20201021, when booting up, I am seeing this: > > [ 0.560896] UBSAN: signed-integer-overflow in > > ../drivers/gpu/drm/drm_modes.c:765:20 > >

Re: [Intel-gfx] drm_modes: signed integer overflow

2020-10-22 Thread Ville Syrjälä
On Wed, Oct 21, 2020 at 08:13:43PM -0700, Randy Dunlap wrote: > Hi, > > With linux-next 20201021, when booting up, I am seeing this: > > [0.560896] UBSAN: signed-integer-overflow in > ../drivers/gpu/drm/drm_modes.c:765:20 > [0.560903] 2376000 * 1000 cannot be represented in type 'int' D

drm_modes: signed integer overflow

2020-10-22 Thread Randy Dunlap
Hi, With linux-next 20201021, when booting up, I am seeing this: [0.560896] UBSAN: signed-integer-overflow in ../drivers/gpu/drm/drm_modes.c:765:20 [0.560903] 2376000 * 1000 cannot be represented in type 'int' [0.560909] CPU: 3 PID: 7 Comm: kworker/u16:0 Not tainted 5.9.0-next-20201