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hisi_acc_vfio_pci: Fix reference leak in hisi_acc_vfio_debug_init

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

Fixes: b398f91779 ("hisi_acc_vfio_pci: register debugfs for hisilicon migration driver")
Cc: stable@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Longfang Liu <liulongfang@huawei.com>
Link: https://lore.kernel.org/r/20250901081809.2286649-1-linmq006@gmail.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Miaoqian Lin 2025-09-01 16:18:08 +08:00 committed by Alex Williamson
parent 801ca4ce0b
commit eaba58355e
1 changed files with 5 additions and 1 deletions
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6
drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
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@ -1612,8 +1612,10 @@ 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);
@ -1623,6 +1625,8 @@ 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);
}
static void hisi_acc_vf_debugfs_exit(struct hisi_acc_vf_core_device *hisi_acc_vdev)