From cf2ec7893f876f4c30aed8a76bb4ebacdce74dd3 Mon Sep 17 00:00:00 2001 From: Sven Schnelle Date: Thu, 30 Sep 2021 19:26:03 +0200 Subject: [PATCH] parisc/unwind: use copy_from_kernel_nofault() I have no idea why get_user() is used there, but we're unwinding the kernel stack, so we should use copy_from_kernel_nofault(). Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller --- arch/parisc/kernel/unwind.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c index 87ae476..889d588 100644 --- a/arch/parisc/kernel/unwind.c +++ b/arch/parisc/kernel/unwind.c @@ -302,7 +302,8 @@ static void unwind_frame_regs(struct unwind_frame_info *info) break; } - if (get_user(tmp, (unsigned long *)(info->prev_sp - RP_OFFSET))) + if (copy_from_kernel_nofault(&tmp, + (void *)info->prev_sp - RP_OFFSET, sizeof(tmp))) break; info->prev_ip = tmp; sp = info->prev_sp; -- 2.7.4