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riscv: Fix set_direct_map_default_noflush() to reset _PAGE_EXEC

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When resetting the linear mapping permissions, we must make sure that we
clear the X bit so that do not end up with WX mappings (since we set
PAGE_KERNEL).

Fixes: 395a21ff85 ("riscv: add ARCH_HAS_SET_DIRECT_MAP support")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20231213134027.155327-3-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Alexandre Ghiti
2023-12-13 14:40:27 +01:00
committed by Palmer Dabbelt
parent 749b94b080
commit b8b2711336
1 changed files with 1 additions and 1 deletions
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2
arch/riscv/mm/pageattr.c
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@@ -383,7 +383,7 @@ int set_direct_map_invalid_noflush(struct page *page)
int set_direct_map_default_noflush(struct page *page) int set_direct_map_default_noflush(struct page *page)
{ {
return __set_memory((unsigned long)page_address(page), 1, return __set_memory((unsigned long)page_address(page), 1,
PAGE_KERNEL, __pgprot(0)); PAGE_KERNEL, __pgprot(_PAGE_EXEC));
} }
#ifdef CONFIG_DEBUG_PAGEALLOC #ifdef CONFIG_DEBUG_PAGEALLOC