This is a note to let you know that I've just added the patch titled
KVM: fix memoryleak in kvm_init()
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-fix-memoryleak-in-kvm_init.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5a2a961be2ad6a16eb388a80442443b353c11d16 Mon Sep 17 00:00:00 2001
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Date: Tue, 23 Aug 2022 14:34:14 +0800
Subject: KVM: fix memoryleak in kvm_init()
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
commit 5a2a961be2ad6a16eb388a80442443b353c11d16 upstream.
When alloc_cpumask_var_node() fails for a certain cpu, there might be some
allocated cpumasks for percpu cpu_kick_mask. We should free these cpumasks
or memoryleak will occur.
Fixes: baff59ccdc65 ("KVM: Pre-allocate cpumasks for kvm_make_all_cpus_request_except()")
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220823063414.59778-1-linmiaohe@xxxxxxxxxx
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
virt/kvm/kvm_main.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -5014,7 +5014,7 @@ int kvm_init(void *opaque, unsigned vcpu
r = kvm_async_pf_init();
if (r)
- goto out_free_5;
+ goto out_free_4;
kvm_chardev_ops.owner = module;
kvm_vm_fops.owner = module;
@@ -5047,10 +5047,9 @@ err_register:
kvm_vfio_ops_exit();
err_vfio:
kvm_async_pf_deinit();
-out_free_5:
+out_free_4:
for_each_possible_cpu(cpu)
free_cpumask_var(per_cpu(cpu_kick_mask, cpu));
-out_free_4:
kmem_cache_destroy(kvm_vcpu_cache);
out_free_3:
unregister_reboot_notifier(&kvm_reboot_notifier);
Patches currently in stable-queue which might be from linmiaohe@xxxxxxxxxx are
queue-5.10/kvm-fix-memoryleak-in-kvm_init.patch
