6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx>
commit f40f939917b2b4cbf18450096c0ce1c58ed59fae upstream.
'attr_name_kobj' is allocated using kzalloc, but on all the error paths
it is not freed, hence we have a memory leak.
Fix the error path before kobject_init_and_add() by adding kfree().
kobject_put() must be always called after passing the object to
kobject_init_and_add(). Only the error path which is immediately next
to kobject_init_and_add() calls kobject_put() and not any other error
path after it.
Fix the error handling after kobject_init_and_add() by moving the
kobject_put() into the goto label err_other_attr_init that is already
used by all the error paths after kobject_init_and_add().
Fixes: a34fc329b189 ("platform/x86: hp-bioscfg: bioscfg")
Cc: stable@xxxxxxxxxxxxxxx # 6.6.x: c5dbf0416000: platform/x86: hp-bioscfg: Simplify return check in hp_add_other_attributes()
Cc: stable@xxxxxxxxxxxxxxx # 6.6.x: 5736aa9537c9: platform/x86: hp-bioscfg: move mutex_lock() down in hp_add_other_attributes()
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <error27@xxxxxxxxx>
Closes: https://lore.kernel.org/r/202309201412.on0VXJGo-lkp@xxxxxxxxx/
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx>
[ij: Added the stable dep tags]
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231113200742.3593548-3-harshit.m.mogalapalli@xxxxxxxxxx
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/platform/x86/hp/hp-bioscfg/bioscfg.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/hp/hp-bioscfg/bioscfg.c b/drivers/platform/x86/hp/hp-bioscfg/bioscfg.c
index a3599498c4e8..6ddca857cc4d 100644
--- a/drivers/platform/x86/hp/hp-bioscfg/bioscfg.c
+++ b/drivers/platform/x86/hp/hp-bioscfg/bioscfg.c
@@ -613,14 +613,14 @@ static int hp_add_other_attributes(int attr_type)
default:
pr_err("Error: Unknown attr_type: %d\n", attr_type);
ret = -EINVAL;
- goto err_other_attr_init;
+ kfree(attr_name_kobj);
+ goto unlock_drv_mutex;
}
ret = kobject_init_and_add(attr_name_kobj, &attr_name_ktype,
NULL, "%s", attr_name);
if (ret) {
pr_err("Error encountered [%d]\n", ret);
- kobject_put(attr_name_kobj);
goto err_other_attr_init;
}
@@ -645,6 +645,8 @@ static int hp_add_other_attributes(int attr_type)
return 0;
err_other_attr_init:
+ kobject_put(attr_name_kobj);
+unlock_drv_mutex:
mutex_unlock(&bioscfg_drv.mutex);
kfree(obj);
return ret;
--
2.43.0
