Re: [PATCH] powerpc/8xx: Fix STRICT_KERNEL_RWX startup test failure

[Christophe Leroy]

Le 20/04/2020 Ã 07:29, Christophe Leroy a ÃcritÂ:
> WRITE_RO lkdtm test works.
>
> But when selecting CONFIG_DEBUG_RODATA_TEST, the kernel reports
> 	rodata_test: test data was not read only
>
> This is because when rodata test runs, there are still old entries
> in TLB.
>
> Flush TLB after setting kernel pages RO or NX.
>
> Fixes: d5f17ee96447 ("powerpc/8xx: don't disable large TLBs with CONFIG_STRICT_KERNEL_RWX")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
> ---
>   arch/powerpc/kvm/Makefile    | 2 +-

Oops, this change shouldn't be there. Will send v2.

>   arch/powerpc/mm/nohash/8xx.c | 3 +++
>   2 files changed, 4 insertions(+), 1 deletion(-)


Christophe