diff options
Diffstat (limited to 'pkg/sentry/vfs/vfs.go')
| -rw-r--r-- | pkg/sentry/vfs/vfs.go | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/pkg/sentry/vfs/vfs.go b/pkg/sentry/vfs/vfs.go index 908c69f91..9629afee9 100644 --- a/pkg/sentry/vfs/vfs.go +++ b/pkg/sentry/vfs/vfs.go @@ -379,6 +379,25 @@ func (vfs *VirtualFilesystem) OpenAt(ctx context.Context, creds *auth.Credential fd, err := rp.mount.fs.impl.OpenAt(ctx, rp, *opts) if err == nil { vfs.putResolvingPath(rp) + + // TODO(gvisor.dev/issue/1193): Move inside fsimpl to avoid another call + // to FileDescription.Stat(). + if opts.FileExec { + // Only a regular file can be executed. + stat, err := fd.Stat(ctx, StatOptions{Mask: linux.STATX_TYPE}) + if err != nil { + return nil, err + } + if stat.Mask&linux.STATX_TYPE != 0 { + // This shouldn't happen, but if type can't be retrieved, file can't + // be executed. + return nil, syserror.EACCES + } + if linux.FileMode(stat.Mode).FileType() != linux.ModeRegular { + return nil, syserror.EACCES + } + } + return fd, nil } if !rp.handleError(err) { |