* [PATCH] arm64/mm: add pud_user_exec() check in pud_user_accessible_page()
@ 2022-11-22 12:31 Liu Shixin
2023-01-05 18:03 ` Will Deacon
0 siblings, 1 reply; 2+ messages in thread
From: Liu Shixin @ 2022-11-22 12:31 UTC (permalink / raw)
To: Catalin Marinas, Will Deacon, Kefeng Wang
Cc: linux-arm-kernel, linux-kernel, Liu Shixin
Add check for the executable case in pud_user_accessible_page() too
like what we did for pte and pmd.
Fixes: 42b2547137f5 ("arm64/mm: enable ARCH_SUPPORTS_PAGE_TABLE_CHECK")
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
---
arch/arm64/include/asm/pgtable.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 17afb09f386f..f1cfc44ef52f 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -682,7 +682,7 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
#define pud_leaf(pud) (pud_present(pud) && !pud_table(pud))
#define pud_valid(pud) pte_valid(pud_pte(pud))
#define pud_user(pud) pte_user(pud_pte(pud))
-
+#define pud_user_exec(pud) pte_user_exec(pud_pte(pud))
static inline void set_pud(pud_t *pudp, pud_t pud)
{
@@ -868,7 +868,7 @@ static inline bool pmd_user_accessible_page(pmd_t pmd)
static inline bool pud_user_accessible_page(pud_t pud)
{
- return pud_leaf(pud) && pud_user(pud);
+ return pud_leaf(pud) && (pud_user(pud) || pud_user_exec(pud));
}
#endif
--
2.25.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] arm64/mm: add pud_user_exec() check in pud_user_accessible_page()
2022-11-22 12:31 [PATCH] arm64/mm: add pud_user_exec() check in pud_user_accessible_page() Liu Shixin
@ 2023-01-05 18:03 ` Will Deacon
0 siblings, 0 replies; 2+ messages in thread
From: Will Deacon @ 2023-01-05 18:03 UTC (permalink / raw)
To: Liu Shixin, Kefeng Wang, Catalin Marinas
Cc: kernel-team, Will Deacon, linux-kernel, linux-arm-kernel
On Tue, 22 Nov 2022 20:31:37 +0800, Liu Shixin wrote:
> Add check for the executable case in pud_user_accessible_page() too
> like what we did for pte and pmd.
>
>
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64/mm: add pud_user_exec() check in pud_user_accessible_page()
https://git.kernel.org/arm64/c/730a11f982e6
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
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2022-11-22 12:31 [PATCH] arm64/mm: add pud_user_exec() check in pud_user_accessible_page() Liu Shixin
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