3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: "K. Y. Srinivasan" <k...@microsoft.com>
commit 1392550240aaa72ce3a094a38bd23525cd67ce60 upstream.
Fix a memory leak in the error handling path in the function vmbus_open().
Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
Reviewed-by: Haiyang Zhang <haiya...@microsoft.com>
Reported-by: Jason Wang <jasow...@redhat.com>
Acked-by: Jason Wang <jasow...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/hv/channel.c | 24 +++++++++++++-----------
1 file changed, 13 insertions(+), 11 deletions(-)
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -146,14 +146,14 @@ int vmbus_open(struct vmbus_channel *new
if (ret != 0) {
err = ret;
- goto errorout;
+ goto error0;
}
ret = hv_ringbuffer_init(
&newchannel->inbound, in, recv_ringbuffer_size);
if (ret != 0) {
err = ret;
- goto errorout;
+ goto error0;
}
@@ -168,7 +168,7 @@ int vmbus_open(struct vmbus_channel *new
if (ret != 0) {
err = ret;
- goto errorout;
+ goto error0;
}
/* Create and init the channel open message */
@@ -177,7 +177,7 @@ int vmbus_open(struct vmbus_channel *new
GFP_KERNEL);
if (!open_info) {
err = -ENOMEM;
- goto errorout;
+ goto error0;
}
init_completion(&open_info->waitevent);
@@ -193,7 +193,7 @@ int vmbus_open(struct vmbus_channel *new
if (userdatalen > MAX_USER_DEFINED_BYTES) {
err = -EINVAL;
- goto errorout;
+ goto error0;
}
if (userdatalen)
@@ -208,19 +208,18 @@ int vmbus_open(struct vmbus_channel *new
sizeof(struct vmbus_channel_open_channel));
if (ret != 0)
- goto cleanup;
+ goto error1;
t = wait_for_completion_timeout(&open_info->waitevent, 5*HZ);
if (t == 0) {
err = -ETIMEDOUT;
- goto errorout;
+ goto error1;
}
if (open_info->response.open_result.status)
err = open_info->response.open_result.status;
-cleanup:
spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
list_del(&open_info->msglistentry);
spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
@@ -228,9 +227,12 @@ cleanup:
kfree(open_info);
return err;
-errorout:
- hv_ringbuffer_cleanup(&newchannel->outbound);
- hv_ringbuffer_cleanup(&newchannel->inbound);
+error1:
+ spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
+ list_del(&open_info->msglistentry);
+ spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags);
+
+error0:
free_pages((unsigned long)out,
get_order(send_ringbuffer_size + recv_ringbuffer_size));
kfree(open_info);
--
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