From 670beaed0216aa59603501e8f14e1f04b138bc47 Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Tue, 30 Nov 2021 12:48:34 +0100 Subject: [PATCH] Cygwin: setrlimit: Add a permission check If the incoming soft limit is less restrictive than the current hard limit, bail out with EPERM. Given the previous sanity check, this implies trying to raise the hard limit. While, theoretically, this should be allowed for privileged processes, Windows has no matching concept in terms of job limits Signed-off-by: Corinna Vinschen --- winsup/cygwin/resource.cc | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/winsup/cygwin/resource.cc b/winsup/cygwin/resource.cc index 46d74b984..c4c79ca6f 100644 --- a/winsup/cygwin/resource.cc +++ b/winsup/cygwin/resource.cc @@ -261,6 +261,12 @@ setrlimit (int resource, const struct rlimit *rlp) __leave; } + if (rlp->rlim_cur > oldlimits.rlim_max) + { + set_errno (EPERM); + __leave; + } + switch (resource) { case RLIMIT_AS: -- 2.43.5