[PATCH] KVM: PPC: Fix callback check in kvmppc_gsm_refresh_info

[PATCH] KVM: PPC: Fix callback check in kvmppc_gsm_refresh_info

[nhuquynh]

From 80fd05e6d156d5a90d4908f2498bf6cc7acbdefd Mon Sep 17 00:00:00 2001
From: Bui Nguyen Nhu Quynh <nhuquynh@tutamail.com>
Date: Tue, 1 Sep 2026 19:39:49 +0700
Subject: [PATCH] KVM: PPC: Fix callback check in kvmppc_gsm_refresh_info

The kvmppc_gsm_refresh_info() function incorrectly checks for the
presence of the fill_info callback instead of refresh_info.

This can lead to:
- NULL pointer dereference if refresh_info is NULL but fill_info is present
- EINVAL return if refresh_info is present but fill_info is NULL

Fix this by checking the correct callback.

Fixes: 6ccbbc33f06ad ("KVM: PPC: Add helper library for Guest State Buffers")
Signed-off-by: Bui Nguyen Nhu Quynh <nhuquynh@tutamail.com>
---
arch/powerpc/kvm/guest-state-buffer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/guest-state-buffer.c b/arch/powerpc/kvm/guest-state-buffer.c
index 42843eca6727..aeb586ba4523 100644
--- a/arch/powerpc/kvm/guest-state-buffer.c
+++ b/arch/powerpc/kvm/guest-state-buffer.c
@@ -598,7 +598,7 @@ EXPORT_SYMBOL_GPL(kvmppc_gsm_fill_info);
int kvmppc_gsm_refresh_info(struct kvmppc_gs_msg *gsm,
    struct kvmppc_gs_buff *gsb)
{
-	if (!gsm->ops->fill_info)
+	if (!gsm->ops->refresh_info)
return -EINVAL;
 
return gsm->ops->refresh_info(gsm, gsb);
-- 
2.54.0