During the review of "[PATCH] vsock/virtio: Initialize core virtio vsock before registering the driver", Stefan pointed out some possible issues in the .probe() and .remove() callbacks of the virtio-vsock driver. This series tries to solve these issues: - Patch 1 adds RCU critical sections to avoid use-after-free of 'the_virtio_vsock' pointer. - Patch 2 stops workers before to call vdev->config->reset(vdev) to be sure that no one is accessing the device. - Patch 3 moves the works flush at the end of the .remove() to avoid use-after-free of 'vsock' object. v2: - Patch 1: use RCU to protect 'the_virtio_vsock' pointer - Patch 2: no changes - Patch 3: flush works only at the end of .remove() - Removed patch 4 because virtqueue_detach_unused_buf() returns all the buffers allocated. v1: https://patchwork.kernel.org/cover/10964733/ Stefano Garzarella (3): vsock/virtio: use RCU to avoid use-after-free on the_virtio_vsock vsock/virtio: stop workers during the .remove() vsock/virtio: fix flush of works during the .remove() net/vmw_vsock/virtio_transport.c | 131 ++++++++++++++++++++++++------- 1 file changed, 102 insertions(+), 29 deletions(-) -- 2.20.1
