Re: [PATCH v3 0/2] Let illegal access to user-space memory die

[Ben Dooks]

On 22/12/2020 02:35, Palmer Dabbelt wrote:
> On Thu, 03 Dec 2020 21:42:57 PST (-0800), tesheng@xxxxxxxxxxxxx wrote:
> > Accesses to user-space memory without calling uaccess routine
> > leads to hanging in page fault handler. Like arm64, we let it
> > die earlier in page fault handler.
> >
> > Changes in v3:
> >     -Let no_context() use die_kernel_fault() helper
> >
> > Changes in v2:
> >     -Add a die_kernel_fault() helper
> >     -Split one long line code into two
> >
> > Eric Lin (2):
> >   riscv/mm: Introduce a die_kernel_fault() helper function
> >   riscv/mm: Prevent kernel module to access user memory without uaccess
> >     routines
> >
> >  arch/riscv/mm/fault.c | 28 ++++++++++++++++++++++------
> >  1 file changed, 22 insertions(+), 6 deletions(-)
>
> Thanks, these will be on for-next when the merge window ends.

Just tested this and it seems to be working.

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Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

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