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[24.6.151.244]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-af9bc31d4d1sm8075554a12.21.2025.04.07.19.44.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Apr 2025 19:44:54 -0700 (PDT) Date: Mon, 7 Apr 2025 19:44:52 -0700 From: Joe Damato To: Chenyuan Yang Cc: jiawenwu@trustnetic.com, mengyuanlou@net-swift.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, duanqiangwen@net-swift.com, dlemoal@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] net: libwx: handle page_pool_dev_alloc_pages error Message-ID: Mail-Followup-To: Joe Damato , Chenyuan Yang , jiawenwu@trustnetic.com, mengyuanlou@net-swift.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, duanqiangwen@net-swift.com, dlemoal@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250407184952.2111299-1-chenyuan0y@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250407184952.2111299-1-chenyuan0y@gmail.com> On Mon, Apr 07, 2025 at 01:49:52PM -0500, Chenyuan Yang wrote: > page_pool_dev_alloc_pages could return NULL. There was a WARN_ON(!page) > but it would still proceed to use the NULL pointer and then crash. > > This is similar to commit 001ba0902046 > ("net: fec: handle page_pool_dev_alloc_pages error"). > > This is found by our static analysis tool KNighter. > > Signed-off-by: Chenyuan Yang > Fixes: 3c47e8ae113a ("net: libwx: Support to receive packets in NAPI") > --- > drivers/net/ethernet/wangxun/libwx/wx_lib.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) Reviewed-by: Joe Damato