[PATCH 6.0 0374/1073] drbd: remove call to memset before free device/resource/connection

Greg Kroah-Hartman
2022-12-28T15:42:39Z

From: Wang ShaoBo <bobo.shaobowang@huawei.com>

[ Upstream commit 6e7b854e4c1b02dba00760dfa79d8dbf6cce561e ]

This revert c2258ffc56f2 ("drbd: poison free'd device, resource and
connection structs"), add memset is odd here for debugging, there are
some methods to accurately show what happened, such as kdump.

Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Link: https://lore.kernel.org/r/20221124015817.2729789-2-bobo.shaobowang@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 8692814b77ca ("drbd: destroy workqueue when drbd device was freed")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/block/drbd/drbd_main.c | 3 ---
1 file changed, 3 deletions(-)

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 8532b839a343..78cae4e75af1 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2217,7 +2217,6 @@ void drbd_destroy_device(struct kref *kref)
kref_put(&peer_device->connection->kref, drbd_destroy_connection);
kfree(peer_device);
}
- memset(device, 0xfd, sizeof(*device));
kfree(device);
kref_put(&resource->kref, drbd_destroy_resource);
}
@@ -2309,7 +2308,6 @@ void drbd_destroy_resource(struct kref *kref)
idr_destroy(&resource->devices);
free_cpumask_var(resource->cpu_mask);
kfree(resource->name);
- memset(resource, 0xf2, sizeof(*resource));
kfree(resource);
}

@@ -2650,7 +2648,6 @@ void drbd_destroy_connection(struct kref *kref)
drbd_free_socket(&connection->data);
kfree(connection->int_dig_in);
kfree(connection->int_dig_vv);
- memset(connection, 0xfc, sizeof(*connection));
kfree(connection);
kref_put(&resource->kref, drbd_destroy_resource);
}
--
2.35.1