[PATCH 5.10 013/145] ibmvnic: fix login buffer memory leak

Greg Kroah-Hartman
2021-01-11T13:15:03Z

From: Lijun Pan <ljp@linux.ibm.com>

[ Upstream commit a0c8be56affa7d5ffbdec24c992223be54db3b6e ]

Commit 34f0f4e3f488 ("ibmvnic: Fix login buffer memory leaks") frees
login_rsp_buffer in release_resources() and send_login()
because handle_login_rsp() does not free it.
Commit f3ae59c0c015 ("ibmvnic: store RX and TX subCRQ handle array in
ibmvnic_adapter struct") frees login_rsp_buffer in handle_login_rsp().
It seems unnecessary to free it in release_resources() and send_login().
There are chances that handle_login_rsp returns earlier without freeing
buffers. Double-checking the buffer is harmless since
release_login_buffer and release_login_rsp_buffer will
do nothing if buffer is already freed.

Fixes: f3ae59c0c015 ("ibmvnic: store RX and TX subCRQ handle array in ibmvnic_adapter struct")
Fixes: 34f0f4e3f488 ("ibmvnic: Fix login buffer memory leaks")
Signed-off-by: Lijun Pan <ljp@linux.ibm.com>
Link: https://lore.kernel.org/r/20201219213919.21045-1-ljp@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/ibm/ibmvnic.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -932,6 +932,7 @@ static void release_resources(struct ibm
release_rx_pools(adapter);

release_napi(adapter);
+ release_login_buffer(adapter);
release_login_rsp_buffer(adapter);
}

@@ -3768,7 +3769,9 @@ static int send_login(struct ibmvnic_ada
return -1;
}

+ release_login_buffer(adapter);
release_login_rsp_buffer(adapter);
+
client_data_len = vnic_client_data_len(adapter);

buffer_size =