diff options
| author | Xiangsheng Hou <xiangsheng.hou@mediatek.com> | 2025-04-07 19:50:49 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-25 10:47:55 +0200 |
| commit | c3e31d613951c299487844c4d1686a933e8ee291 (patch) | |
| tree | f7a1b9a481e49d607f0e15f2b90e08fec1b4d459 | |
| parent | 5683eaf4eeede8af0e1e36171d306ec986c26de5 (diff) | |
virtiofs: add filesystem context source name check
commit a94fd938df2b1628da66b498aa0eeb89593bc7a2 upstream.
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.
Fixes: a62a8ef9d97d ("virtio-fs: add virtiofs filesystem")
Cc: <stable@vger.kernel.org> # all LTS kernels
Signed-off-by: Xiangsheng Hou <xiangsheng.hou@mediatek.com>
Link: https://lore.kernel.org/20250407115111.25535-1-xiangsheng.hou@mediatek.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/fuse/virtio_fs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index d220e28e755f..749c9f66d74c 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -1663,6 +1663,9 @@ 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. |