Attempting to transmit rx_done messages after the GLINK instance is being torn down will cause use after free and memory leaks. So cancel the intent_work and free up the pending intents.

Fixes: 1d2ea36eead9 ("rpmsg: glink: Add rx done command") Cc: stable@vger.kernel.org Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org --- drivers/rpmsg/qcom_glink_native.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index 89e02baea2d0..0d7518a6ebf0 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -241,11 +241,23 @@ static void qcom_glink_channel_release(struct kref *ref) { struct glink_channel *channel = container_of(ref, struct glink_channel, refcount); + struct glink_core_rx_intent *intent; struct glink_core_rx_intent *tmp; unsigned long flags; int iid;

+ /* cancel pending rx_done work */ + cancel_work_sync(&channel->intent_work); + spin_lock_irqsave(&channel->intent_lock, flags); + /* Free all non-reuse intents pending rx_done work */ + list_for_each_entry_safe(intent, tmp, &channel->done_intents, node) { + if (!intent->reuse) { + kfree(intent->data); + kfree(intent); + } + } + idr_for_each_entry(&channel->liids, tmp, iid) { kfree(tmp->data); kfree(tmp);