linux-kernel - [PATCH] nfp: abm: fix a memory leak bug

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Message-Id: <20200502224259.1477-1-wu000273@umn.edu>
Date:   Sat,  2 May 2020 17:42:59 -0500
From:   wu000273@....edu
To:     kuba@...nel.org
Cc:     davem@...emloft.net, oss-drivers@...ronome.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org, kjlu@....edu,
        wu000273@....edu
Subject: [PATCH] nfp: abm: fix a memory leak bug

From: Qiushi Wu <wu000273@....edu>

In function nfp_abm_vnic_set_mac, pointer nsp is allocated by nfp_nsp_open.
But when nfp_nsp_has_hwinfo_lookup fail, the pointer is not released,
which can lead to a memory leak bug. Fix this issue by adding
nfp_nsp_close(nsp) in the error path.

Signed-off-by: Qiushi Wu <wu000273@....edu>
---
 drivers/net/ethernet/netronome/nfp/abm/main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/netronome/nfp/abm/main.c b/drivers/net/ethernet/netronome/nfp/abm/main.c
index 9183b3e85d21..354efffac0f9 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/main.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/main.c
@@ -283,6 +283,7 @@ nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm *abm, struct nfp_net *nn,
 	if (!nfp_nsp_has_hwinfo_lookup(nsp)) {
 		nfp_warn(pf->cpp, "NSP doesn't support PF MAC generation\n");
 		eth_hw_addr_random(nn->dp.netdev);
+		nfp_nsp_close(nsp);
 		return;
 	}
 
-- 
2.17.1