On 5/10/2022 4:27 AM, Eli Cohen wrote:
In vdpa_nl_cmd_dev_get_doit(), if the call to genlmsg_reply() fails we
must not call nlmsg_free() since this is done inside genlmsg_reply().
Fix it.
Fixes: bc0d90ee021f ("vdpa: Enable user to query vdpa device info")
Acked-by: Jason Wang <[email protected]>
Signed-off-by: Eli Cohen <[email protected]>
Reviewed-by: Si-Wei Liu <[email protected]>
---
drivers/vdpa/vdpa.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 2b75c00b1005..fac89a0d8178 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -756,14 +756,19 @@ static int vdpa_nl_cmd_dev_get_doit(struct sk_buff *skb,
struct genl_info *info)
goto mdev_err;
}
err = vdpa_dev_fill(vdev, msg, info->snd_portid, info->snd_seq, 0,
info->extack);
- if (!err)
- err = genlmsg_reply(msg, info);
+ if (err)
+ goto mdev_err;
+
+ err = genlmsg_reply(msg, info);
+ put_device(dev);
+ mutex_unlock(&vdpa_dev_mutex);
+ return err;
+
mdev_err:
put_device(dev);
err:
mutex_unlock(&vdpa_dev_mutex);
- if (err)
- nlmsg_free(msg);
+ nlmsg_free(msg);
return err;
}
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