linux-kernel - [PATCH] IB/hfi1: fix a memleak in init_credit

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Message-Id: <20240112085523.3731720-1-alexious@zju.edu.cn>
Date: Fri, 12 Jan 2024 16:55:23 +0800
From: Zhipeng Lu <alexious@....edu.cn>
To: alexious@....edu.cn
Cc: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Leon Romanovsky <leon@...nel.org>,
	Jubin John <jubin.john@...el.com>,
	Mitko Haralanov <mitko.haralanov@...el.com>,
	Ravi Krishnaswamy <ravi.krishnaswamy@...el.com>,
	Harish Chegondi <harish.chegondi@...el.com>,
	Brendan Cunningham <brendan.cunningham@...el.com>,
	linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] IB/hfi1: fix a memleak in init_credit_return

When dma_alloc_coherent fails to allocate dd->cr_base[i].va,
init_credit_return should deallocate dd->cr_base and
dd->cr_base[i] that allocated before. Or those resources
would be never freed and a memleak is triggered.

Fixes: 7724105686e7 ("IB/hfi1: add driver files")
Signed-off-by: Zhipeng Lu <alexious@....edu.cn>
---
 drivers/infiniband/hw/hfi1/pio.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hfi1/pio.c b/drivers/infiniband/hw/hfi1/pio.c
index 68c621ff59d0..5a91cbda4aee 100644
--- a/drivers/infiniband/hw/hfi1/pio.c
+++ b/drivers/infiniband/hw/hfi1/pio.c
@@ -2086,7 +2086,7 @@ int init_credit_return(struct hfi1_devdata *dd)
 				   "Unable to allocate credit return DMA range for NUMA %d\n",
 				   i);
 			ret = -ENOMEM;
-			goto done;
+			goto free_cr_base;
 		}
 	}
 	set_dev_node(&dd->pcidev->dev, dd->node);
@@ -2094,6 +2094,10 @@ int init_credit_return(struct hfi1_devdata *dd)
 	ret = 0;
 done:
 	return ret;
+
+free_cr_base:
+	free_credit_return(dd);
+	goto done;
 }
 
 void free_credit_return(struct hfi1_devdata *dd)
-- 
2.34.1