linux-kernel - [PATCH 4.4 06/23] 9p/trans_virtio: Remove sysfs file on probe failure

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Message-Id: <20210924124328.032349290@linuxfoundation.org>
Date:   Fri, 24 Sep 2021 14:43:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Xie Yongji <xieyongji@...edance.com>,
        Dominique Martinet <asmadeus@...ewreck.org>
Subject: [PATCH 4.4 06/23] 9p/trans_virtio: Remove sysfs file on probe failure

From: Xie Yongji <xieyongji@...edance.com>

commit f997ea3b7afc108eb9761f321b57de2d089c7c48 upstream.

This ensures we don't leak the sysfs file if we failed to
allocate chan->vc_wq during probe.

Link: http://lkml.kernel.org/r/20210517083557.172-1-xieyongji@bytedance.com
Fixes: 86c8437383ac ("net/9p: Add sysfs mount_tag file for virtio 9P device")
Signed-off-by: Xie Yongji <xieyongji@...edance.com>
Signed-off-by: Dominique Martinet <asmadeus@...ewreck.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/9p/trans_virtio.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -605,7 +605,7 @@ static int p9_virtio_probe(struct virtio
 	chan->vc_wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL);
 	if (!chan->vc_wq) {
 		err = -ENOMEM;
-		goto out_free_tag;
+		goto out_remove_file;
 	}
 	init_waitqueue_head(chan->vc_wq);
 	chan->ring_bufs_avail = 1;
@@ -623,6 +623,8 @@ static int p9_virtio_probe(struct virtio
 
 	return 0;
 
+out_remove_file:
+	sysfs_remove_file(&vdev->dev.kobj, &dev_attr_mount_tag.attr);
 out_free_tag:
 	kfree(tag);
 out_free_vq: