From: Alan Cox <alan@linux.intel.com>
Date: Fri, 25 Mar 2016 20:24:41 +0000 (+0000)
Subject: syscall_fs2: chown rules
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=14d0604ac749c8cadd9d91ade6c61401c4931b76;p=FUZIX.git

syscall_fs2: chown rules

Under non-historic unix you don't get to chown a file to a group you are not
a member of
---

diff --git a/Kernel/syscall_fs2.c b/Kernel/syscall_fs2.c
index 3ef77639..41cd1c70 100644
--- a/Kernel/syscall_fs2.c
+++ b/Kernel/syscall_fs2.c
@@ -244,7 +244,8 @@ arg_t _fchmod(void)
 
 static int chown_op(inoptr ino)
 {
-	if (ino->c_node.i_uid != udata.u_euid && esuper())
+	if ((ino->c_node.i_uid != udata.u_euid ||
+	        (group != udata.u_gid &&  !in_group(group))) && esuper())
 		return (-1);
 	if (ino->c_flags & CRDONLY) {
 		udata.u_error = EROFS;