diff options
Diffstat (limited to 'pkg/sentry/fs/gofer/inode.go')
| -rw-r--r-- | pkg/sentry/fs/gofer/inode.go | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/pkg/sentry/fs/gofer/inode.go b/pkg/sentry/fs/gofer/inode.go index b97635ec4..da3178527 100644 --- a/pkg/sentry/fs/gofer/inode.go +++ b/pkg/sentry/fs/gofer/inode.go @@ -600,11 +600,25 @@ func (i *inodeOperations) Truncate(ctx context.Context, inode *fs.Inode, length if i.session().cachePolicy.useCachingInodeOps(inode) { return i.cachingInodeOps.Truncate(ctx, inode, length) } + + uattr, err := i.fileState.unstableAttr(ctx) + if err != nil { + return err + } + if i.session().cachePolicy == cacheRemoteRevalidating { - return i.fileState.hostMappable.Truncate(ctx, length) + return i.fileState.hostMappable.Truncate(ctx, length, uattr) + } + + mask := p9.SetAttrMask{Size: true} + attr := p9.SetAttr{Size: uint64(length)} + if uattr.Perms.HasSetUIDOrGID() { + mask.Permissions = true + uattr.Perms.DropSetUIDAndMaybeGID() + attr.Permissions = p9.FileMode(uattr.Perms.LinuxMode()) } - return i.fileState.file.setAttr(ctx, p9.SetAttrMask{Size: true}, p9.SetAttr{Size: uint64(length)}) + return i.fileState.file.setAttr(ctx, mask, attr) } // GetXattr implements fs.InodeOperations.GetXattr. |