From: Claudio Imbrenda <imbrenda@linux.ibm.com>
Date: Tue, 19 May 2026 15:01:10 +0000 (+0200)
Subject: KVM: s390: vsie: Fix memory leak when unshadowing
X-Git-Tag: v7.1-rc5~1^2~5^2~4
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=d0f2eb4493d1c3c8fecb5eadb5c1382074873ef9;p=thirdparty%2Flinux.git

KVM: s390: vsie: Fix memory leak when unshadowing

When performing a partial unshadowing, the rmap was being leaked.

Add the missing kfree().

Fixes: a2c17f9270cc ("KVM: s390: New gmap code")
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
---

diff --git a/arch/s390/kvm/gmap.c b/arch/s390/kvm/gmap.c
index 3c26e35af0ef7..fd19277619809 100644
--- a/arch/s390/kvm/gmap.c
+++ b/arch/s390/kvm/gmap.c
@@ -1143,8 +1143,10 @@ void _gmap_handle_vsie_unshadow_event(struct gmap *parent, gfn_t gfn)
 		}
 		scoped_guard(spinlock, &sg->host_to_rmap_lock)
 			head = radix_tree_delete(&sg->host_to_rmap, gfn);
-		gmap_for_each_rmap_safe(rmap, rnext, head)
+		gmap_for_each_rmap_safe(rmap, rnext, head) {
 			gmap_unshadow_level(sg, rmap->r_gfn, rmap->level);
+			kfree(rmap);
+		}
 	}
 }