diff options
Diffstat (limited to 'pkg/sentry/fsimpl/gofer/regular_file.go')
| -rw-r--r-- | pkg/sentry/fsimpl/gofer/regular_file.go | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/pkg/sentry/fsimpl/gofer/regular_file.go b/pkg/sentry/fsimpl/gofer/regular_file.go index f7a15a2ed..404a452c4 100644 --- a/pkg/sentry/fsimpl/gofer/regular_file.go +++ b/pkg/sentry/fsimpl/gofer/regular_file.go @@ -72,7 +72,9 @@ func (fd *regularFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offs if offset < 0 { return 0, syserror.EINVAL } - if opts.Flags != 0 { + + // Check that flags are supported. Silently ignore RWF_HIPRI. + if opts.Flags&^linux.RWF_HIPRI != 0 { return 0, syserror.EOPNOTSUPP } @@ -123,9 +125,12 @@ func (fd *regularFileFD) PWrite(ctx context.Context, src usermem.IOSequence, off if offset < 0 { return 0, syserror.EINVAL } - if opts.Flags != 0 { + + // Check that flags are supported. Silently ignore RWF_HIPRI. + if opts.Flags&^linux.RWF_HIPRI != 0 { return 0, syserror.EOPNOTSUPP } + limit, err := vfs.CheckLimit(ctx, offset, src.NumBytes()) if err != nil { return 0, err |