The current size of VDSO code mapping is hardcoded to PAGE_SIZE. This
cannot work for 4KB page size after commit 18efd0b10e0fd77 ("LoongArch:
vDSO: Wire up getrandom() vDSO implementation") because the code size
increases to 8KB. Thus set the code mapping size to its real size, i.e.
PAGE_ALIGN(vdso_end - vdso_start).
Fixes: 18efd0b10e0fd77 ("LoongArch: vDSO: Wire up getrandom() vDSO implementation")
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
---
arch/loongarch/kernel/vdso.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/loongarch/kernel/vdso.c b/arch/loongarch/kernel/vdso.c
index f6fcc52aefae..7e0cc7f5e1ed 100644
--- a/arch/loongarch/kernel/vdso.c
+++ b/arch/loongarch/kernel/vdso.c
@@ -85,7 +85,6 @@ static vm_fault_t vvar_fault(const struct vm_special_mapping *sm,
struct loongarch_vdso_info vdso_info = {
.vdso = vdso_start,
- .size = PAGE_SIZE,
.code_mapping = {
.name = "[vdso]",
.pages = vdso_pages,
@@ -103,7 +102,7 @@ static int __init init_vdso(void)
unsigned long i, cpu, pfn;
BUG_ON(!PAGE_ALIGNED(vdso_info.vdso));
- BUG_ON(!PAGE_ALIGNED(vdso_info.size));
+ vdso_info.size = PAGE_ALIGN(vdso_end - vdso_start);
for_each_possible_cpu(cpu)
vdso_pdata[cpu].node = cpu_to_node(cpu);
--
2.43.5
