diff options
| author | Nicolas Lacasse <nlacasse@google.com> | 2019-06-28 15:27:25 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-06-28 15:28:41 -0700 |
| commit | 295078fa7ae7893f3deb0e6042e2aecfaba0dd1c (patch) | |
| tree | a03544fe8182db496dc7b96c5d68d64b5bb66b41 /pkg/sentry/fs/inode_overlay.go | |
| parent | e21d49c2d82b7d109bc7c8955edea1787de59ac0 (diff) | |
Automated rollback of changelist 255263686
PiperOrigin-RevId: 255679453
Diffstat (limited to 'pkg/sentry/fs/inode_overlay.go')
| -rw-r--r-- | pkg/sentry/fs/inode_overlay.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pkg/sentry/fs/inode_overlay.go b/pkg/sentry/fs/inode_overlay.go index b247fa514..24b769cfc 100644 --- a/pkg/sentry/fs/inode_overlay.go +++ b/pkg/sentry/fs/inode_overlay.go @@ -567,6 +567,12 @@ func overlayCheck(ctx context.Context, o *overlayEntry, p PermMask) error { if o.upper != nil { err = o.upper.check(ctx, p) } else { + if p.Write { + // Since writes will be redirected to the upper filesystem, the lower + // filesystem need not be writable, but must be readable for copy-up. + p.Write = false + p.Read = true + } err = o.lower.check(ctx, p) } o.copyMu.RUnlock() |