linux-kernel - [PATCH net-next] netdevsim: dev: Fix memory leak in nsim_dev_take_snapshot

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Message-ID: <20200330232702.GA3212@embeddedor.com>
Date:   Mon, 30 Mar 2020 18:27:02 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Jiri Pirko <jiri@...lanox.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH net-next] netdevsim: dev: Fix memory leak in
 nsim_dev_take_snapshot_write

In case memory resources for dummy_data were allocated, release them
before return.

Addresses-Coverity-ID: 1491997 ("Resource leak")
Fixes: 7ef19d3b1d5e ("devlink: report error once U32_MAX snapshot ids have been used")
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/net/netdevsim/dev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 2b727a7001f6..9897e9a0e26f 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -75,6 +75,7 @@ static ssize_t nsim_dev_take_snapshot_write(struct file *file,
 	err = devlink_region_snapshot_id_get(devlink, &id);
 	if (err) {
 		pr_err("Failed to get snapshot id\n");
+		kfree(dummy_data);
 		return err;
 	}
 	err = devlink_region_snapshot_create(nsim_dev->dummy_region,
-- 
2.23.0