Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-16 Thread Daniel Vetter
On Mon, Feb 08, 2021 at 02:12:00PM -0800, Kees Cook wrote: > On Fri, Feb 05, 2021 at 10:00:12PM +, Chris Wilson wrote: > > Userspace has discovered the functionality offered by SYS_kcmp and has > > started to depend upon it. In particular, Mesa uses SYS_kcmp for > > os_same_file_description() i

Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-15 Thread Thomas Zimmermann
Hi Am 05.02.21 um 23:00 schrieb Chris Wilson: Userspace has discovered the functionality offered by SYS_kcmp and has started to depend upon it. In particular, Mesa uses SYS_kcmp for os_same_file_description() in order to identify when two fd (e.g. device or dmabuf) point to the same struct file.

Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-12 Thread Emil Velikov
On Fri, 12 Feb 2021 at 14:01, Michel Dänzer wrote: > > On 2021-02-12 1:57 p.m., Emil Velikov wrote: > > On Fri, 5 Feb 2021 at 22:01, Chris Wilson wrote: > >> > >> Userspace has discovered the functionality offered by SYS_kcmp and has > >> started to depend upon it. In particular, Mesa uses SYS_kc

Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-12 Thread Emil Velikov
On Fri, 12 Feb 2021 at 13:14, Simon Ser wrote: > > On Friday, February 12th, 2021 at 1:57 PM, Emil Velikov > wrote: > > > On Fri, 5 Feb 2021 at 22:01, Chris Wilson wrote: > > > > > > Userspace has discovered the functionality offered by SYS_kcmp and has > > > started to depend upon it. In parti

Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-12 Thread Michel Dänzer
On 2021-02-12 1:57 p.m., Emil Velikov wrote: On Fri, 5 Feb 2021 at 22:01, Chris Wilson wrote: Userspace has discovered the functionality offered by SYS_kcmp and has started to depend upon it. In particular, Mesa uses SYS_kcmp for os_same_file_description() in order to identify when two fd (e.g

Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-12 Thread Simon Ser
On Friday, February 12th, 2021 at 1:57 PM, Emil Velikov wrote: > On Fri, 5 Feb 2021 at 22:01, Chris Wilson wrote: > > > > Userspace has discovered the functionality offered by SYS_kcmp and has > > started to depend upon it. In particular, Mesa uses SYS_kcmp for > > os_same_file_description() in

Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-12 Thread Emil Velikov
On Fri, 5 Feb 2021 at 22:01, Chris Wilson wrote: > > Userspace has discovered the functionality offered by SYS_kcmp and has > started to depend upon it. In particular, Mesa uses SYS_kcmp for > os_same_file_description() in order to identify when two fd (e.g. device > or dmabuf) As you rightfully

Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-08 Thread Kees Cook
On Fri, Feb 05, 2021 at 10:00:12PM +, Chris Wilson wrote: > Userspace has discovered the functionality offered by SYS_kcmp and has > started to depend upon it. In particular, Mesa uses SYS_kcmp for > os_same_file_description() in order to identify when two fd (e.g. device > or dmabuf) point to

Re: [PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-06 Thread Cyrill Gorcunov
On Fri, Feb 05, 2021 at 10:00:12PM +, Chris Wilson wrote: > Userspace has discovered the functionality offered by SYS_kcmp and has > started to depend upon it. In particular, Mesa uses SYS_kcmp for > os_same_file_description() in order to identify when two fd (e.g. device > or dmabuf) point to

[PATCH v3] kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE

2021-02-05 Thread Chris Wilson
Userspace has discovered the functionality offered by SYS_kcmp and has started to depend upon it. In particular, Mesa uses SYS_kcmp for os_same_file_description() in order to identify when two fd (e.g. device or dmabuf) point to the same struct file. Since they depend on it for core functionality,