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CVE-2022-34494: rpmsg: virtio: Fix possible double free in rpmsg_virtio_add_ctrl_dev() · torvalds/linux@1680939

rpmsg_virtio_add_ctrl_dev in drivers/rpmsg/virtio_rpmsg_bus.c in the Linux kernel before 5.18.4 has a double free.

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

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

Fixes: c486682 (“rpmsg: virtio: Register the rpmsg_char device”) Signed-off-by: Hangyu Hua [email protected] Tested-by: Arnaud Pouliquen [email protected] Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Mathieu Poirier [email protected]

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