diff mbox series

[2/6] blk-wbt: introduce wbt_free()

Message ID 20210923134631.105719-3-yukuai3@huawei.com (mailing list archive)
State New, archived
Headers show
Series fix uaf in rq_qos_done_io() | expand

Commit Message

Yu Kuai Sept. 23, 2021, 1:46 p.m. UTC 
Prepare to split 'kfree(rwb)' from wbt_exit(), no functional changes.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
 block/blk-wbt.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 874c1c37bf0c..4190453d5e0b 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -694,6 +694,13 @@  static void wbt_exit(struct rq_qos *rqos)
 	kfree(rwb);
 }
 
+static void wbt_free(struct rq_qos *rqos)
+{
+	struct rq_wb *rwb = RQWB(rqos);
+
+	kfree(rwb);
+}
+
 /*
  * Disable wbt, if enabled by default.
  */
@@ -808,6 +815,7 @@  static struct rq_qos_ops wbt_rqos_ops = {
 	.cleanup = wbt_cleanup,
 	.queue_depth_changed = wbt_queue_depth_changed,
 	.exit = wbt_exit,
+	.free = wbt_free,
 #ifdef CONFIG_BLK_DEBUG_FS
 	.debugfs_attrs = wbt_debugfs_attrs,
 #endif