From 7a8cbc5288ec0cf6efa966254bd4dd8973486bc9 Mon Sep 17 00:00:00 2001
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Mon, 2 Sep 2019 16:57:42 +0000
Subject: [PATCH] Relax compat.linux.osrelease checks.  This way one can do eg
 'compat.linux.osrelease=3.10.0-957.12.1.el7.x86_64', which corresponds to
 CentOS 7.

MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D20685
---
 sys/compat/linux/linux_mib.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/compat/linux/linux_mib.c b/sys/compat/linux/linux_mib.c
index 99c7065f72d..d74313056b3 100644
--- a/sys/compat/linux/linux_mib.c
+++ b/sys/compat/linux/linux_mib.c
@@ -146,7 +146,8 @@ linux_map_osrel(char *osrelease, int *osrel)
 		return (EINVAL);
 	osrelease = sep + 1;
 	v2 = strtol(osrelease, &sep, 10);
-	if (osrelease == sep || sep != eosrelease)
+	if (osrelease == sep ||
+	    (sep != eosrelease && (sep + 1 >= eosrelease || *sep != '-')))
 		return (EINVAL);
 
 	v = LINUX_KERNVER(v0, v1, v2);