From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Daniel Axtens <dja@axtens.net>
Date: Fri, 22 Jan 2021 14:42:21 +1100
Subject: [PATCH] disk/lvm: Do not allow a LV to be it's own segment's node's
 LV

This prevents infinite recursion in the diskfilter verification code.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/disk/lvm.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/grub-core/disk/lvm.c b/grub-core/disk/lvm.c
index 9eda28d852c..7e86bb7df4f 100644
--- a/grub-core/disk/lvm.c
+++ b/grub-core/disk/lvm.c
@@ -840,9 +840,13 @@ error_parsing_metadata:
 		    }
 		if (lv1->segments[i].nodes[j].pv == NULL)
 		  for (lv2 = vg->lvs; lv2; lv2 = lv2->next)
-		    if (grub_strcmp (lv2->name,
-				     lv1->segments[i].nodes[j].name) == 0)
-		      lv1->segments[i].nodes[j].lv = lv2;
+		    {
+		      if (lv1 == lv2)
+		        continue;
+		      if (grub_strcmp (lv2->name,
+				       lv1->segments[i].nodes[j].name) == 0)
+			lv1->segments[i].nodes[j].lv = lv2;
+		    }
 	      }
 	
       }