diff options
| author | Andrei Vagin <avagin@google.com> | 2021-01-05 09:45:27 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-01-05 09:47:30 -0800 |
| commit | 2a200811d4c95e1c84d2bdd56068f02d46ebc524 (patch) | |
| tree | 7b9de79aadc2173717747e40c9022737bc00d4d4 /pkg/sentry/fsimpl/fuse/fusefs.go | |
| parent | 807a080d9574e42dae83bb8bd0863b110b98a858 (diff) | |
fs/fuse: check that a task has a specified file descriptor
Reported-by: syzbot+814105309d2ae8651084@syzkaller.appspotmail.com
PiperOrigin-RevId: 350159452
Diffstat (limited to 'pkg/sentry/fsimpl/fuse/fusefs.go')
| -rw-r--r-- | pkg/sentry/fsimpl/fuse/fusefs.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pkg/sentry/fsimpl/fuse/fusefs.go b/pkg/sentry/fsimpl/fuse/fusefs.go index 3af807a21..204d8d143 100644 --- a/pkg/sentry/fsimpl/fuse/fusefs.go +++ b/pkg/sentry/fsimpl/fuse/fusefs.go @@ -129,6 +129,9 @@ func (fsType FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.Virt return nil, nil, syserror.EINVAL } fuseFDGeneric := kernelTask.GetFileVFS2(int32(deviceDescriptor)) + if fuseFDGeneric == nil { + return nil, nil, syserror.EINVAL + } defer fuseFDGeneric.DecRef(ctx) fuseFD, ok := fuseFDGeneric.Impl().(*DeviceFD) if !ok { |