[PATCH] firmware/dmi-sysfs: Fix a double free in dmi_sysfs_register_handle

[Lv Yunlong]

In the case of DMI_ENTRY_SYSTEM_EVENT_LOG, it calls
dmi_system_event_log(entry). If dmi_system_event_log()
failed, it will free the entry->child and return err.

But in the out_err branch, the entry->child will be freed
again. My patch adds a new label "out_err1" to avoid freeing
entry->child twice.

Signed-off-by: Lv Yunlong <lyl2...@mail.ustc.edu.cn>
---
 drivers/firmware/dmi-sysfs.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/dmi-sysfs.c b/drivers/firmware/dmi-sysfs.c
index 8b8127fa8955..fd498f2037a8 100644
--- a/drivers/firmware/dmi-sysfs.c
+++ b/drivers/firmware/dmi-sysfs.c
@@ -622,16 +622,17 @@ static void __init dmi_sysfs_register_handle(const struct 
dmi_header *dh,
                break;
        }
        if (*ret)
-               goto out_err;
+               goto out_err1;
 
        /* Create the raw binary file to access the entry */
        *ret = sysfs_create_bin_file(&entry->kobj, &dmi_entry_raw_attr);
        if (*ret)
-               goto out_err;
+               goto out_err2;
 
        return;
-out_err:
+out_err2:
        kobject_put(entry->child);
+out_err1:
        kobject_put(&entry->kobj);
        return;
 }
-- 
2.25.1