, July 24, 2025 10:36 AM
To: Thomas Zimmermann
Cc: intel-gfx@lists.freedesktop.org; dri-de...@lists.freedesktop.org; Shyti,
Andi
Subject: RE: [PATCH] iosys-map: Fix undefined behavior in iosys_map_clear()
Hi Thomas,
Hi
Am 18.07.25 um 16:47 schrieb Andi Shyti:
Hi Nitin,
On Fri, Jul 18, 2025 at
freedesktop.org; Shyti,
> Andi
>
> Subject: RE: [PATCH] iosys-map: Fix undefined behavior in iosys_map_clear()
>
> Hi Thomas,
>
> >
> > Hi
> >
> > Am 18.07.25 um 16:47 schrieb Andi Shyti:
> > > Hi Nitin,
> > >
> > > On Fri, Ju
Hi Thomas,
>
> Hi
>
> Am 18.07.25 um 16:47 schrieb Andi Shyti:
> > Hi Nitin,
> >
> > On Fri, Jul 18, 2025 at 04:20:51PM +0530, Nitin Gote wrote:
> >> The current iosys_map_clear() implementation reads the potentially
> >> uninitialized 'is_iomem' boolean field to decide which union member
> >> t
Hi
Am 18.07.25 um 16:47 schrieb Andi Shyti:
Hi Nitin,
On Fri, Jul 18, 2025 at 04:20:51PM +0530, Nitin Gote wrote:
The current iosys_map_clear() implementation reads the potentially
uninitialized 'is_iomem' boolean field to decide which union member
to clear. This causes undefined behavior when
Hi Nitin,
On Fri, Jul 18, 2025 at 04:20:51PM +0530, Nitin Gote wrote:
> The current iosys_map_clear() implementation reads the potentially
> uninitialized 'is_iomem' boolean field to decide which union member
> to clear. This causes undefined behavior when called on uninitialized
> structures, as
The current iosys_map_clear() implementation reads the potentially
uninitialized 'is_iomem' boolean field to decide which union member
to clear. This causes undefined behavior when called on uninitialized
structures, as 'is_iomem' may contain garbage values like 0xFF.
UBSAN detects this as:
UB
