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| author | Xiangsheng Hou <xiangsheng.hou@mediatek.com> | 2025-04-07 19:50:49 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-02 07:44:14 +0200 |
| commit | 5ee09cdaf3414f6c92960714af46d3d90eede2f3 (patch) | |
| tree | 129306ae0b3aff6d3e873e74324d2d2f8bf9e614 /fs/fuse | |
| parent | aac80c3e05cb97e77a39450de7a2a9e29ddf18e6 (diff) | |
| download | linux-5ee09cdaf3414f6c92960714af46d3d90eede2f3.tar.gz linux-5ee09cdaf3414f6c92960714af46d3d90eede2f3.tar.bz2 linux-5ee09cdaf3414f6c92960714af46d3d90eede2f3.zip | |
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>
Diffstat (limited to 'fs/fuse')
| -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 a4deacc6f78c..ba8d5f5dbeb0 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -1431,6 +1431,9 @@ 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. |