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net: ll_temac: check the return value of devm_kmalloc()

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commit b352c3465b upstream.

devm_kmalloc() returns a pointer to allocated memory on success, NULL
on failure. While lp->indirect_lock is allocated by devm_kmalloc()
without proper check. It is better to check the value of it to
prevent potential wrong memory access.

Fixes: f14f5c11f0 ("net: ll_temac: Support indirect_mutex share within TEMAC IP")
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xiaoke Wang 2022-02-18 10:19:39 +08:00 • committed by Greg Kroah-Hartman
commit 550d98ab30
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/xilinx/ll_temac_main.c
View file

@ -1421,6 +1421,8 @@ static int temac_probe(struct platform_device *pdev)
lp->indirect_lock = devm_kmalloc(&pdev->dev,
sizeof(*lp->indirect_lock),
GFP_KERNEL);
if (!lp->indirect_lock)
return -ENOMEM;
spin_lock_init(lp->indirect_lock);
}