linux-kernel - [PATCH] fjes: Check possible NULL pointer returned by vzalloc

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Message-Id: <20211229102140.1776466-1-jiasheng@iscas.ac.cn>
Date:   Wed, 29 Dec 2021 18:21:40 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] fjes: Check possible NULL pointer returned by vzalloc

As the possible alloc failure of the vzalloc(), the 'hw->hw_info.trace'
could be NULL pointer.
Therefore it should be better to check it to guarantee the complete
success of the initiation.

Fixes: 8cdc3f6c5d22 ("fjes: Hardware initialization routine")
Signed-off-by: Jiasheng Jiang <jiasheng@...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 065bb0a40b1d..4c83f637a135 100644
--- a/drivers/net/fjes/fjes_hw.c
+++ b/drivers/net/fjes/fjes_hw.c
@@ -329,6 +329,9 @@ 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