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crypto: hisilicon/qm - Fix device reference leak in qm_get_qos_value

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commit 59b0afd01b2ce353ab422ea9c8375b03db313a21 upstream.

The qm_get_qos_value() function calls bus_find_device_by_name() which
increases the device reference count, but fails to call put_device()
to balance the reference count and lead to a device reference leak.

Add put_device() calls in both the error path and success path to
properly balance the reference count.

Found via static analysis.

Fixes: 22d7a6c39c ("crypto: hisilicon/qm - add pci bdf number check")
Cc: stable@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Miaoqian Lin
2025-10-27 23:09:34 +08:00
committed by Greg Kroah-Hartman
parent 868fc62811
commit bfdcd67e0f
1 changed files with 2 additions and 0 deletions
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2
drivers/crypto/hisilicon/qm.c
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@@ -3750,10 +3750,12 @@ static ssize_t qm_get_qos_value(struct hisi_qm *qm, const char *buf,
pdev = container_of(dev, struct pci_dev, dev);
if (pci_physfn(pdev) != qm->pdev) {
pci_err(qm->pdev, "the pdev input does not match the pf!\n");
put_device(dev);
return -EINVAL;
}
*fun_index = pdev->devfn;
put_device(dev);
return 0;
}