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riscv: Fix set_direct_map_default_noflush() to reset _PAGE_EXEC
author
Alexandre Ghiti
<alexghiti@rivosinc.com>
Wed, 13 Dec 2023 13:40:27 +0000
(14:40 +0100)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Thu, 25 Jan 2024 23:35:50 +0000
(15:35 -0800)
[ Upstream commit
b8b2711336f03ece539de61479d6ffc44fb603d3
]
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:
395a21ff859c
("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
arch/riscv/mm/pageattr.c
patch
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diff --git
a/arch/riscv/mm/pageattr.c
b/arch/riscv/mm/pageattr.c
index
fc5fc4f
..
e703a9b
100644
(file)
--- a/
arch/riscv/mm/pageattr.c
+++ b/
arch/riscv/mm/pageattr.c
@@
-378,7
+378,7
@@
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