On 2025/9/1 16:18, Miaoqian Lin wrote:

The debugfs_lookup() function returns a dentry with an increased reference count that must be released by calling dput().

Fixes: b398f91779b8 ("hisi_acc_vfio_pci: register debugfs for hisilicon migration driver") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin linmq006@gmail.com

---

drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c index 2149f49aeec7..1710485cbbec 100644 --- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c +++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c @@ -1611,8 +1611,10 @@ static void hisi_acc_vfio_debug_init(struct hisi_acc_vf_core_device *hisi_acc_vd } migf = kzalloc(sizeof(*migf), GFP_KERNEL);

• if (!migf)

• if (!migf) {

• dput(vfio_dev_migration);
  

  return;
• } hisi_acc_vdev->debug_migf = migf;

vfio_hisi_acc = debugfs_create_dir("hisi_acc", vfio_dev_migration); @@ -1622,6 +1624,8 @@ static void hisi_acc_vfio_debug_init(struct hisi_acc_vf_core_device *hisi_acc_vd hisi_acc_vf_migf_read); debugfs_create_devm_seqfile(dev, "cmd_state", vfio_hisi_acc, hisi_acc_vf_debug_cmd);

• dput(vfio_dev_migration);

}

Reviewed-by: Longfang Liu liulongfang@huawei.com

Thanks! Longfang.

static void hisi_acc_vf_debugfs_exit(struct hisi_acc_vf_core_device *hisi_acc_vdev)