linux-kernel - [PATCH] fjes: Add missing check for vzalloc

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Message-Id: <20230925085318.1228225-1-nichen@iscas.ac.cn>
Date:   Mon, 25 Sep 2023 08:53:18 +0000
From:   Chen Ni <nichen@...as.ac.cn>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, nichen@...as.ac.cn, izumi.taku@...fujitsu.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] fjes: Add missing check for vzalloc

Because of the potential failure of the vzalloc(), the hw->hw_info.trace
could be NULL.
Therefore, we need to check it and return -ENOMEM in order to transfer
the error.

Fixes: b6ba737d0b29 ("fjes: ethtool -w and -W support for fjes driver")
Signed-off-by: Chen Ni <nichen@...as.ac.cn>
---
 drivers/net/fjes/fjes_hw.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c
index 704e949484d0..3a06a3cf021d 100644
--- a/drivers/net/fjes/fjes_hw.c
+++ b/drivers/net/fjes/fjes_hw.c
@@ -330,6 +330,9 @@ int fjes_hw_init(struct fjes_hw *hw)
 	ret = fjes_hw_setup(hw);
 
 	hw->hw_info.trace = vzalloc(FJES_DEBUG_BUFFER_SIZE);
+	if (!hw->hw_info.trace)
+		return -ENOMEM;
+
 	hw->hw_info.trace_size = FJES_DEBUG_BUFFER_SIZE;
 
 	return ret;
-- 
2.25.1