6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexandre Ghiti alexghiti@rivosinc.com
[ 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 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index fc5fc4f785c4..e703a9b59fc3 100644 --- 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