D31712.id94333.diff
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	Index: sys/kern/vfs_vnops.c
	===================================================================
	--- sys/kern/vfs_vnops.c
	+++ sys/kern/vfs_vnops.c
	@@ -3463,8 +3463,10 @@

	static int
	vn_deallocate_impl(struct vnode vp, off_t offset, off_t *length, int flags,
	- int ioflag, struct ucred active_cred, struct ucred file_cred)
	+ int ioflag, struct ucred active_cred, struct ucred file_cred,
	+ bool from_fops)
	{
	+ struct ucred *cred;
	struct mount *mp;
	void *rl_cookie;
	off_t off, len;
	@@ -3508,9 +3510,14 @@
	error = mac_vnode_check_write(active_cred, file_cred,
	vp);
	#endif
	- if (error == 0)
	+ if (error == 0) {
	+ if (file_cred != NULL && !from_fops)
	+ cred = file_cred;
	+ else
	+ cred = active_cred;
	error = VOP_DEALLOCATE(vp, &off, &len, flags, ioflag,
	- active_cred);
	+ cred);
	+ }

	if ((ioflag & IO_NODELOCKED) == 0) {
	VOP_UNLOCK(vp);
	@@ -3541,7 +3548,7 @@
	return (ENODEV);

	return (vn_deallocate_impl(vp, offset, length, flags, ioflag,
	- active_cred, file_cred));
	+ active_cred, file_cred, false));
	}

	static int
	@@ -3565,7 +3572,7 @@
	switch (cmd) {
	case SPACECTL_DEALLOC:
	error = vn_deallocate_impl(vp, offset, length, flags, ioflag,
	- active_cred, fp->f_cred);
	+ active_cred, fp->f_cred, true);
	break;
	default:
	panic("vn_fspacectl: unknown cmd %d", cmd);