[PATCH 1/2] Loongarch: Fix stale value in __do_page_fault()

[Lorenz Hetterich]

__do_page_fault() calls kprobe_page_fault without setting
current->thread.trap_nr first.
Hence, kprobe_page_fault is called with a stale trapnr.

Set current->thread.trap_nr before calling kprobe_page_fault.

Signed-off-by: Lorenz Hetterich <lorenz.hetterich@xxxxxxxx>
---
 arch/loongarch/mm/fault.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/loongarch/mm/fault.c b/arch/loongarch/mm/fault.c
index 2c93d33356e5..c7703bdec4fc 100644
--- a/arch/loongarch/mm/fault.c
+++ b/arch/loongarch/mm/fault.c
@@ -182,6 +182,7 @@ static void __kprobes __do_page_fault(struct pt_regs *regs,
 	struct vm_area_struct *vma = NULL;
 	vm_fault_t fault;
 
+	current->thread.trap_nr = read_csr_excode();
 	if (kprobe_page_fault(regs, current->thread.trap_nr))
 		return;
 
-- 
2.43.0