From 6e5549717a4e9fabbb71e5aba35a488ed826ad09 Mon Sep 17 00:00:00 2001
From: Dmitry Chagin <dchagin@FreeBSD.org>
Date: Sat, 26 Dec 2015 09:04:47 +0000
Subject: [PATCH] Do not allow access to emuldata for non Linux processes.

Pointed out by:	mjg@
Security:	https://admbugs.freebsd.org/show_bug.cgi?id=679
---
 sys/compat/linux/linux_futex.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/compat/linux/linux_futex.c b/sys/compat/linux/linux_futex.c
index 84fc996e95b..e2aad790ce2 100644
--- a/sys/compat/linux/linux_futex.c
+++ b/sys/compat/linux/linux_futex.c
@@ -1099,6 +1099,8 @@ linux_get_robust_list(struct thread *td, struct linux_get_robust_list_args *args
 			    ESRCH);
 			return (ESRCH);
 		}
+		if (SV_PROC_ABI(td2->td_proc) != SV_ABI_LINUX)
+			return (EPERM);
 
 		em = em_find(td2);
 		KASSERT(em != NULL, ("get_robust_list: emuldata notfound.\n"));