[PATCH -next] livepatch: Fix missing unlock on error in klp_enable_patch()

[Yang Yingliang]

Add missing unlock when try_module_get() fails in klp_enable_patch().

Fixes: bf01c2975925 ("livepatch: Fix kobject refcount bug on klp_init_patch_early failure path")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
 kernel/livepatch/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index 23cf444091a8..01bfab7fe7c0 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -1047,8 +1047,10 @@ int klp_enable_patch(struct klp_patch *patch)
 		return -EINVAL;
 	}
 
-	if (!try_module_get(patch->mod))
+	if (!try_module_get(patch->mod)) {
+		mutex_unlock(&klp_mutex);
 		return -ENODEV;
+	}
 
 	klp_init_patch_early(patch);
 
-- 
2.25.1