Unverified Commit b8b27113 authored by Alexandre Ghiti's avatar Alexandre Ghiti Committed by Palmer Dabbelt
Browse files

riscv: Fix set_direct_map_default_noflush() to reset _PAGE_EXEC 



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: 395a21ff ("riscv: add ARCH_HAS_SET_DIRECT_MAP support")
Signed-off-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20231213134027.155327-3-alexghiti@rivosinc.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent 749b94b0

arch/riscv/mm/pageattr.c

+1 −1
Original line number Diff line number Diff line
@@ -383,7 +383,7 @@ int set_direct_map_invalid_noflush(struct page *page) 
int set_direct_map_default_noflush(struct page *page)

{

	return __set_memory((unsigned long)page_address(page), 1,

			    PAGE_KERNEL, __pgprot(0));

			    PAGE_KERNEL, __pgprot(_PAGE_EXEC));

}



#ifdef CONFIG_DEBUG_PAGEALLOC