Message ID | 20221117032220.3442738-1-ruanjinjie@huawei.com |
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State | New |
Headers |
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Series |
tee: optee: fix possible memory leak in optee_register_device()
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Commit Message
Jinjie Ruan
Nov. 17, 2022, 3:22 a.m. UTC
If device_register() returns error in optee_register_device(),
name of kobject which is allocated in dev_set_name() called in device_add()
is leaked.
Never directly free @dev after calling device_register(), even
if it returned an error! Always use put_device() to give up the
reference initialized.
Fixes: c3fa24af9244 ("tee: optee: add TEE bus device enumeration support")
Signed-off-by: ruanjinjie <ruanjinjie@huawei.com>
---
drivers/tee/optee/device.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Comments
Hi, On Thu, 17 Nov 2022 at 08:55, ruanjinjie <ruanjinjie@huawei.com> wrote: > > If device_register() returns error in optee_register_device(), > name of kobject which is allocated in dev_set_name() called in device_add() > is leaked. > > Never directly free @dev after calling device_register(), even > if it returned an error! Always use put_device() to give up the > reference initialized. > > Fixes: c3fa24af9244 ("tee: optee: add TEE bus device enumeration support") > Signed-off-by: ruanjinjie <ruanjinjie@huawei.com> > --- > drivers/tee/optee/device.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > There's already a prior patch posted to fix this here [1]. [1] https://lists.trustedfirmware.org/archives/list/op-tee@lists.trustedfirmware.org/thread/BMADRGTZ63GP5ORMMISW7RJPMZKINXE7/ -Sumit > diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c > index f3947be13e2e..64f0e047c23d 100644 > --- a/drivers/tee/optee/device.c > +++ b/drivers/tee/optee/device.c > @@ -80,7 +80,7 @@ static int optee_register_device(const uuid_t *device_uuid) > rc = device_register(&optee_device->dev); > if (rc) { > pr_err("device registration failed, err: %d\n", rc); > - kfree(optee_device); > + put_device(&optee_device->dev); > } > > return rc; > -- > 2.25.1 >
diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c index f3947be13e2e..64f0e047c23d 100644 --- a/drivers/tee/optee/device.c +++ b/drivers/tee/optee/device.c @@ -80,7 +80,7 @@ static int optee_register_device(const uuid_t *device_uuid) rc = device_register(&optee_device->dev); if (rc) { pr_err("device registration failed, err: %d\n", rc); - kfree(optee_device); + put_device(&optee_device->dev); } return rc;