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

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commit 59b0afd01b 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>

...

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Miaoqian Lin 2025-10-27 23:09:34 +08:00 • committed by Greg Kroah-Hartman

parent f89c5e7077

commit 16e33851c3

1 changed files with 2 additions and 0 deletions

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drivers/crypto/hisilicon/qm.c

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