Special pte mappings are not intended to be executable and do not even
have an associated struct page. This patch ensures that we do not call
__sync_icache_dcache() on such ptes.
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Reported-by: Steve Capper <Steve.Capper@xxxxxxx>
Tested-by: Laura Abbott <lauraa@xxxxxxxxxxxxxx>
Tested-by: Bharat Bhushan <Bharat.Bhushan@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/pgtable.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index a72c166..31974d8 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -167,7 +167,7 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
{
if (pte_valid_user(pte)) {
- if (pte_exec(pte))
+ if (!pte_special(pte) && pte_exec(pte))
__sync_icache_dcache(pte, addr);
if (!pte_dirty(pte))
pte = pte_wrprotect(pte);
--
1.7.0.4
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