From 40384e4bbeb9f2651fe9bffc0062d9f31ef625bf Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 27 Feb 2015 11:26:04 -0800 Subject: [PATCH] Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open() Correctly rollback state if the failure occurs after we have handed over the ownership of the buffer to the host. Signed-off-by: K. Y. Srinivasan Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/hv/channel.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index f6879950e131..bf0cf8f3bcaf 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -137,7 +137,7 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, GFP_KERNEL); if (!open_info) { err = -ENOMEM; - goto error0; + goto error_gpadl; } init_completion(&open_info->waitevent); @@ -153,7 +153,7 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size, if (userdatalen > MAX_USER_DEFINED_BYTES) { err = -EINVAL; - goto error0; + goto error_gpadl; } if (userdatalen) @@ -197,6 +197,9 @@ error1: list_del(&open_info->msglistentry); spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); +error_gpadl: + vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle); + error0: free_pages((unsigned long)out, get_order(send_ringbuffer_size + recv_ringbuffer_size));