| Message ID | 20250221020325.7184-1-xiangsheng.hou@mediatek.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | virtiofs: add filesystem context source name check | expand |
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index 2c7b24cb67ad..53c2626e90e7 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -1669,6 +1669,9 @@ static int virtio_fs_get_tree(struct fs_context *fsc) unsigned int virtqueue_size; int err = -EIO; + if (!fsc->source) + return invalf(fsc, "No source specified"); + /* This gets a reference on virtio_fs object. This ptr gets installed * in fc->iq->priv. Once fuse_conn is going away, it calls ->put() * to drop the reference to this object.
In certain scenarios, for example, during fuzz testing, the source name may be NULL, which could lead to a kernel panic. Therefore, an extra check for the source name should be added. Signed-off-by: Xiangsheng Hou <xiangsheng.hou@mediatek.com> --- fs/fuse/virtio_fs.c | 3 +++ 1 file changed, 3 insertions(+)