[PATCH 5.4 103/151] cosa: Add missing kfree in error path of cosa_write

[Greg Kroah-Hartman]

From: Wang Hai <wangha...@huawei.com>

[ Upstream commit 52755b66ddcef2e897778fac5656df18817b59ab ]

If memory allocation for 'kbuf' succeed, cosa_write() doesn't have a
corresponding kfree() in exception handling. Thus add kfree() for this
function implementation.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Wang Hai <wangha...@huawei.com>
Acked-by: Jan "Yenya" Kasprzak <k...@fi.muni.cz>
Link: https://lore.kernel.org/r/20201110144614.43194-1-wangha...@huawei.com
Signed-off-by: Jakub Kicinski <k...@kernel.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/net/wan/cosa.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index af539151d6638..61428076f32e4 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -889,6 +889,7 @@ static ssize_t cosa_write(struct file *file,
                        chan->tx_status = 1;
                        spin_unlock_irqrestore(&cosa->lock, flags);
                        up(&chan->wsem);
+                       kfree(kbuf);
                        return -ERESTARTSYS;
                }
        }
-- 
2.27.0