[patch 1/2] KVM: fix error handling in kvm_create_vm_debugfs()

[Dan Carpenter]

The "goto out_err" is buggy because we forgot to set the return code.

The other issue is that if the kmalloc() fails, we should remove the
debugfs directory before returning.

Fixes: 7805f53a85ec ('KVM: Create debugfs dir and stat files for each VM')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 1ee2f73..f62621f 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -571,12 +571,14 @@ static int kvm_create_vm_debugfs(struct kvm *kvm)
        snprintf(dir_name, sizeof(dir_name), "%d", current->pid);
        kvm->debugfs_dentry = debugfs_create_dir(dir_name, kvm_debugfs_dir);
        if (!kvm->debugfs_dentry)
-               goto out_err;
+               return -ENOMEM;
 
        kvm->debugfs_data = kmalloc(sizeof(*kvm->debugfs_data) *
                                    kvm_debugfs_num_entries, GFP_KERNEL);
-       if (!kvm->debugfs_data)
-               return -ENOMEM;
+       if (!kvm->debugfs_data) {
+               r = -ENOMEM;
+               goto err_remove_dir;
+       }
 
        for (p = debugfs_entries; p->name; p++, i++) {
                stat_data = kzalloc(sizeof(*stat_data), GFP_KERNEL);
@@ -600,13 +602,15 @@ static int kvm_create_vm_debugfs(struct kvm *kvm)
        return r;
 
 out_err_clean:
-       debugfs_remove_recursive(kvm->debugfs_dentry);
        kfree(stat_data);
        for (i--; i >= 0; i--)
                kfree(kvm->debugfs_data[i]);
 
        kfree(kvm->debugfs_data);
-out_err:
+
+err_remove_dir:
+       debugfs_remove_recursive(kvm->debugfs_dentry);
+
        return r;
 }
 
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html