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KVM: s390: vsie: Fix refcount overflow for shadow gmaps 

In most cases gmap_put() was not called when it should have.

Add the missing gmap_put() in vsie_run().

Fixes: e38c884df9 ("KVM: s390: Switch to new gmap")
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
This commit is contained in:
Claudio Imbrenda 2026-03-26 14:17:16 +01:00
parent fd7bc612cf
commit 0ec456b8a5
1 changed files with 3 additions and 1 deletions
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4
arch/s390/kvm/vsie.c
View File

@ -1328,7 +1328,7 @@ static void unregister_shadow_scb(struct kvm_vcpu *vcpu)
static int vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
{
struct kvm_s390_sie_block *scb_s = &vsie_page->scb_s;
struct gmap *sg;
struct gmap *sg = NULL;
int rc = 0;
while (1) {
@ -1368,6 +1368,8 @@ static int vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
sg = gmap_put(sg);
cond_resched();
}
if (sg)
sg = gmap_put(sg);
if (rc == -EFAULT) {
/*