linux-kernel - Re: [PATCH] eth: mlx4: Fix IS_ERR() vs NULL check bug in mlx4_en_create_rx

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Message-ID: <20250805192115.GZ8494@horms.kernel.org>
Date: Tue, 5 Aug 2025 20:21:15 +0100
From: Simon Horman <horms@...nel.org>
To: Miaoqian Lin <linmq006@...il.com>
Cc: Tariq Toukan <tariqt@...dia.com>, Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] eth: mlx4: Fix IS_ERR() vs NULL check bug in
 mlx4_en_create_rx_ring

On Tue, Aug 05, 2025 at 06:50:57AM +0400, Miaoqian Lin wrote:
> Replace NULL check with IS_ERR() check after calling page_pool_create()
> since this function returns error pointers (ERR_PTR).
> Using NULL check could lead to invalid pointer dereference.
> 
> Fixes: 8533b14b3d65 ("eth: mlx4: create a page pool for Rx")
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>

Reviewed-by: Simon Horman <horms@...nel.org>