linux-kernel - [PATCH next] kvm: debugfs: fix memory leak in kvm_create_vm

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Date:   Thu,  1 Jul 2021 22:55:00 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     pbonzini@...hat.com, jingzhangos@...gle.com
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pavel Skripkin <paskripkin@...il.com>
Subject: [PATCH next] kvm: debugfs: fix memory leak in kvm_create_vm_debugfs

In commit bc9e9e672df9 ("KVM: debugfs: Reuse binary stats descriptors")
loop for filling debugfs_stat_data was copy-pasted 2 times, but
in the second loop pointers are saved over pointers allocated
in the first loop. It causes memory leak. Fix it.

Fixes: bc9e9e672df9 ("KVM: debugfs: Reuse binary stats descriptors")
Signed-off-by: Pavel Skripkin <paskripkin@...il.com>
---
 virt/kvm/kvm_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 7d95126cda9e..986959833d70 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -935,7 +935,7 @@ static int kvm_create_vm_debugfs(struct kvm *kvm, int fd)
 		stat_data->kvm = kvm;
 		stat_data->desc = pdesc;
 		stat_data->kind = KVM_STAT_VCPU;
-		kvm->debugfs_stat_data[i] = stat_data;
+		kvm->debugfs_stat_data[i + kvm_vm_stats_header.num_desc] = stat_data;
 		debugfs_create_file(pdesc->name, kvm_stats_debugfs_mode(pdesc),
 				    kvm->debugfs_dentry, stat_data,
 				    &stat_fops_per_vm);
-- 
2.32.0