From: K. Y. Srinivasan Date: Mon, 13 Mar 2017 03:00:30 +0000 (-0700) Subject: Drivers: hv: vmbus: Don't leak memory when a channel is rescinded X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5e030d5ce9d99a899b648413139ff65bab12b038;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Drivers: hv: vmbus: Don't leak memory when a channel is rescinded When we close a channel that has been rescinded, we will leak memory since vmbus_teardown_gpadl() returns an error. Fix this so that we can properly cleanup the memory allocated to the ring buffers. Fixes: ccb61f8a99e6 ("Drivers: hv: vmbus: Fix a rescind handling bug") Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 57b2958205c7..321b8833fa6f 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -502,12 +502,15 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) wait_for_completion(&info->waitevent); - if (channel->rescind) { - ret = -ENODEV; - goto post_msg_err; - } - post_msg_err: + /* + * If the channel has been rescinded; + * we will be awakened by the rescind + * handler; set the error code to zero so we don't leak memory. + */ + if (channel->rescind) + ret = 0; + spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); list_del(&info->msglistentry); spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);