Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-09-20 23:13:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

virtiofs: forbid newlines in tags

Browse Source 
Newlines in virtiofs tags are awkward for users and potential vectors
for string injection attacks.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2024-02-12 19:11:47 -05:00 committed by Miklos Szeredi
parent b401b62175
commit 40488cc16f
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
fs/fuse/virtio_fs.c
View File

@ -323,6 +323,16 @@ static int virtio_fs_read_tag(struct virtio_device *vdev, struct virtio_fs *fs)
return -ENOMEM;
memcpy(fs->tag, tag_buf, len);
fs->tag[len] = '\0';
/* While the VIRTIO specification allows any character, newlines are
* awkward on mount(8) command-lines and cause problems in the sysfs
* "tag" attr and uevent TAG= properties. Forbid them.
*/
if (strchr(fs->tag, '\n')) {
dev_dbg(&vdev->dev, "refusing virtiofs tag with newline character\n");
return -EINVAL;
}
return 0;
}