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

From: Greg Kroah-Hartman
Date: Tue Nov 17 2020 - 08:27:49 EST


From: Wang Hai <wanghai38@xxxxxxxxxx>

[ 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 <hulkci@xxxxxxxxxx>
Signed-off-by: Wang Hai <wanghai38@xxxxxxxxxx>
Acked-by: Jan "Yenya" Kasprzak <kas@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20201110144614.43194-1-wanghai38@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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