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rpmb: fix error path in rpmb_dev_register()

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Until this patch was rpmb_dev_register() always freeing rdev in the error
path. However, past device_register() it must not do that since the memory
is now managed by the device even if it failed to register properly. So fix
this by doing a put_device() before returning the error code.

Fixes the smatch warning:
        drivers/misc/rpmb-core.c:204 rpmb_dev_register()
        warn: freeing device managed memory (leak): 'rdev'

Fixes: 1e9046e3a1 ("rpmb: add Replay Protected Memory Block (RPMB) subsystem")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Link: https://lore.kernel.org/r/20240902105803.2885544-1-jens.wiklander@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jens Wiklander 2024-09-02 12:58:03 +02:00 committed by Ulf Hansson
parent edd3183c5c
commit 5854809b51
1 changed files with 4 additions and 6 deletions
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10
drivers/misc/rpmb-core.c
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@ -187,17 +187,15 @@ struct rpmb_dev *rpmb_dev_register(struct device *dev,
rdev->dev.parent = dev;
ret = device_register(&rdev->dev);
if (ret)
goto err_id_remove;
if (ret) {
put_device(&rdev->dev);
return ERR_PTR(ret);
}
dev_dbg(&rdev->dev, "registered device\n");
return rdev;
err_id_remove:
mutex_lock(&rpmb_mutex);
ida_simple_remove(&rpmb_ida, rdev->id);
mutex_unlock(&rpmb_mutex);
err_free_dev_id:
kfree(rdev->descr.dev_id);
err_free_rdev: