Re: [PATCH] powerpc: Add barrier_nospec to raw_copy_in_user()

2019-12-15 Thread Michal Suchánek
On Thu, Sep 19, 2019 at 12:04:27AM +1000, Michael Ellerman wrote: > Michal Suchánek writes: > > On Wed, 6 Mar 2019 12:10:38 +1100 > > Suraj Jitindar Singh wrote: > > > >> Commit ddf35cf3764b ("powerpc: Use barrier_nospec in copy_from_user()") > >> Added barrier_nospec before loading from

Re: [PATCH] powerpc: Add barrier_nospec to raw_copy_in_user()

2019-09-18 Thread Michael Ellerman
Michal Suchánek writes: > On Wed, 6 Mar 2019 12:10:38 +1100 > Suraj Jitindar Singh wrote: > >> Commit ddf35cf3764b ("powerpc: Use barrier_nospec in copy_from_user()") >> Added barrier_nospec before loading from user-controller pointers. >> The intention was to order the load from the

Re: [PATCH] powerpc: Add barrier_nospec to raw_copy_in_user()

2019-08-21 Thread Michal Suchánek
On Wed, 6 Mar 2019 12:10:38 +1100 Suraj Jitindar Singh wrote: > Commit ddf35cf3764b ("powerpc: Use barrier_nospec in copy_from_user()") > Added barrier_nospec before loading from user-controller pointers. > The intention was to order the load from the potentially user-controlled > pointer vs a

Re: [PATCH] powerpc: Add barrier_nospec to raw_copy_in_user()

2019-07-07 Thread Michael Ellerman
On Wed, 2019-03-06 at 01:10:38 UTC, Suraj Jitindar Singh wrote: > Commit ddf35cf3764b ("powerpc: Use barrier_nospec in copy_from_user()") > Added barrier_nospec before loading from user-controller pointers. > The intention was to order the load from the potentially user-controlled > pointer vs a

[PATCH] powerpc: Add barrier_nospec to raw_copy_in_user()

2019-03-05 Thread Suraj Jitindar Singh
Commit ddf35cf3764b ("powerpc: Use barrier_nospec in copy_from_user()") Added barrier_nospec before loading from user-controller pointers. The intention was to order the load from the potentially user-controlled pointer vs a previous branch based on an access_ok() check or similar. In order to