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rpmsg: virtio: Fix possible double free in rpmsg_probe() 

vch will be free in virtio_rpmsg_release_device() when
rpmsg_ns_register_device() fails. There is no need to call kfree() again.

Fix this by changing error path from free_vch to free_ctrldev.

Fixes: c486682ae1 ("rpmsg: virtio: Register the rpmsg_char device")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Tested-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20220426060536.15594-2-hbh25y@gmail.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
This commit is contained in:
Hangyu Hua 2022-04-26 14:05:34 +08:00 committed by Mathieu Poirier
parent 1a358d3506
commit c2eecefec5
1 changed files with 2 additions and 3 deletions
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5
drivers/rpmsg/virtio_rpmsg_bus.c
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@ -973,7 +973,8 @@ static int rpmsg_probe(struct virtio_device *vdev)
err = rpmsg_ns_register_device(rpdev_ns);
if (err)
goto free_vch;
/* vch will be free in virtio_rpmsg_release_device() */
goto free_ctrldev;
}
/*
@ -997,8 +998,6 @@ static int rpmsg_probe(struct virtio_device *vdev)
return 0;
free_vch:
kfree(vch);
free_ctrldev:
rpmsg_virtio_del_ctrl_dev(rpdev_ctrl);
free_coherent: