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Date: Tue, 10 May 2022 14:27:32 +0300 From: Eli Cohen <elic@...dia.com> To: <mst@...hat.com>, <jasowang@...hat.com> CC: <virtualization@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>, <si-wei.liu@...cle.com>, Eli Cohen <elic@...dia.com> Subject: [PATCH v5 1/3] vdpa: Fix error logic in vdpa_nl_cmd_dev_get_doit 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 <jasowang@...hat.com> Signed-off-by: Eli Cohen <elic@...dia.com> --- 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; } -- 2.35.1
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