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Diffstat (limited to 'pkg/sentry/fsimpl/overlay/overlay.go')
| -rw-r--r-- | pkg/sentry/fsimpl/overlay/overlay.go | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/pkg/sentry/fsimpl/overlay/overlay.go b/pkg/sentry/fsimpl/overlay/overlay.go index 58680bc80..454c20d4f 100644 --- a/pkg/sentry/fsimpl/overlay/overlay.go +++ b/pkg/sentry/fsimpl/overlay/overlay.go @@ -749,6 +749,27 @@ func (d *dentry) mayDelete(creds *auth.Credentials, child *dentry) error { ) } +// newChildOwnerStat returns a Statx for configuring the UID, GID, and mode of +// children. +func (d *dentry) newChildOwnerStat(mode linux.FileMode, creds *auth.Credentials) linux.Statx { + stat := linux.Statx{ + Mask: uint32(linux.STATX_UID | linux.STATX_GID), + UID: uint32(creds.EffectiveKUID), + GID: uint32(creds.EffectiveKGID), + } + // Set GID and possibly the SGID bit if the parent is an SGID directory. + d.copyMu.RLock() + defer d.copyMu.RUnlock() + if atomic.LoadUint32(&d.mode)&linux.ModeSetGID == linux.ModeSetGID { + stat.GID = atomic.LoadUint32(&d.gid) + if stat.Mode&linux.ModeDirectory == linux.ModeDirectory { + stat.Mode = uint16(mode) | linux.ModeSetGID + stat.Mask |= linux.STATX_MODE + } + } + return stat +} + // fileDescription is embedded by overlay implementations of // vfs.FileDescriptionImpl. // |