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Miller" , Kai Ye , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Cc: linmq006@gmail.com, stable@vger.kernel.org Subject: [PATCH] crypto: hisilicon/qm - Fix device reference leak in qm_get_qos_value Date: Mon, 27 Oct 2025 23:09:34 +0800 Message-Id: <20251027150934.60013-1-linmq006@gmail.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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: 22d7a6c39cab ("crypto: hisilicon/qm - add pci bdf number check") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin Reviewed-by: Longfang Liu --- drivers/crypto/hisilicon/qm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index a5b96adf2d1e..3b391a146635 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -3871,10 +3871,12 @@ static ssize_t qm_get_qos_value(struct hisi_qm *qm,= const char *buf, pdev =3D container_of(dev, struct pci_dev, dev); if (pci_physfn(pdev) !=3D qm->pdev) { pci_err(qm->pdev, "the pdev input does not match the pf!\n"); + put_device(dev); return -EINVAL; } =20 *fun_index =3D pdev->devfn; + put_device(dev); =20 return 0; } --=20 2.39.5 (Apple Git-154)