From: Xiangsheng Hou <xiangsheng.hou@mediatek.com>
To: Vivek Goyal <vgoyal@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Miklos Szeredi <miklos@szeredi.hu>, <eperezma@redhat.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>
Cc: <virtualization@lists.linux.dev>, <linux-fsdevel@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
<benliang.zhao@mediatek.com>, <bin.zhang@mediatek.com>,
Xiangsheng Hou <xiangsheng.hou@mediatek.com>
Subject: [RESEND] virtiofs: add filesystem context source name check
Date: Mon, 7 Apr 2025 19:50:49 +0800 [thread overview]
Message-ID: <20250407115111.25535-1-xiangsheng.hou@mediatek.com> (raw)
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(+)
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.
--
2.46.0
next reply other threads:[~2025-04-07 12:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-07 11:50 Xiangsheng Hou [this message]
2025-04-07 13:21 ` [RESEND] virtiofs: add filesystem context source name check Christian Brauner
2025-04-07 13:24 ` Christian Brauner
2025-04-07 14:24 ` Miklos Szeredi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250407115111.25535-1-xiangsheng.hou@mediatek.com \
--to=xiangsheng.hou@mediatek.com \
--cc=angelogioacchino.delregno@collabora.com \
--cc=benliang.zhao@mediatek.com \
--cc=bin.zhang@mediatek.com \
--cc=eperezma@redhat.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=matthias.bgg@gmail.com \
--cc=miklos@szeredi.hu \
--cc=stefanha@redhat.com \
--cc=vgoyal@redhat.com \
--cc=virtualization@lists.linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox