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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-26 16:23:37 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-05-03 01:20:26 +1000 |
| commit | da3a3b0a0e38377c98946420acdc7d4ca38cff47 (patch) | |
| tree | 56962be152c3046b9e791ff5a9867da9b4a0ba7c /arch/powerpc/mm/book3s32/mmu.c | |
| parent | 215b823707ce4e8e52b106915f70357fa474c669 (diff) | |
powerpc/32s: map kasan zero shadow with PAGE_READONLY instead of PAGE_KERNEL_RO
For hash32, the zero shadow page gets mapped with PAGE_READONLY instead
of PAGE_KERNEL_RO, because the PP bits don't provide a RO kernel, so
PAGE_KERNEL_RO is equivalent to PAGE_KERNEL. By using PAGE_READONLY,
the page is RO for both kernel and user, but this is not a security issue
as it contains only zeroes.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/book3s32/mmu.c')
0 files changed, 0 insertions, 0 deletions