diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-05-19 05:48:59 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-26 22:22:19 +1000 |
| commit | 4e3319c23a66dabfd6c35f4d2633d64d99b68096 (patch) | |
| tree | a9ea763d8dcb629402e9e7e4c85b2e6ed8ac085d /arch | |
| parent | 925ac141d106b55acbe112a9272f970631a3c082 (diff) | |
powerpc/mm: Fix conditions to perform MMU specific management by blocks on PPC32.
Setting init mem to NX shall depend on sinittext being mapped by
block, not on stext being mapped by block.
Setting text and rodata to RO shall depend on stext being mapped by
block, not on sinittext being mapped by block.
Fixes: 63b2bc619565 ("powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7d565fb8f51b18a3d98445a830b2f6548cb2da2a.1589866984.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/pgtable_32.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index 9934659cb871..bd0cb6e3573e 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -185,7 +185,7 @@ void mark_initmem_nx(void) unsigned long numpages = PFN_UP((unsigned long)_einittext) - PFN_DOWN((unsigned long)_sinittext); - if (v_block_mapped((unsigned long)_stext + 1)) + if (v_block_mapped((unsigned long)_sinittext)) mmu_mark_initmem_nx(); else change_page_attr(page, numpages, PAGE_KERNEL); @@ -197,7 +197,7 @@ void mark_rodata_ro(void) struct page *page; unsigned long numpages; - if (v_block_mapped((unsigned long)_sinittext)) { + if (v_block_mapped((unsigned long)_stext + 1)) { mmu_mark_rodata_ro(); ptdump_check_wx(); return; |