From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DB63AC5AD49 for ; Tue, 3 Jun 2025 09:02:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Date:Message-Id:From:Subject:Content-Transfer-Encoding:MIME-Version: Content-Type:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=7K0Dq+moou1FQE4J8Z/NYUpHZRRpNQgM8XstxUpKaj8=; b=qjfjfB8yQTZAzJRqGCtWpb/qpm lq10CeCZtcx58gjgxaupXPUDp04ZgBIz1MZxO82EDbupKEfLQNxV1Py76Kvmb0QYuXvKvO7Cx5Q5t NPZbGD/VwzEHYrk1O65MNfqUdxV6Dr1lNrq/7xdbIxMaeVJ2x++yXMVfaTr+UR7Cv9ZvWpApFwOt+ aioPngZdsacsUTZIpCFxmgxrqWOi2/k/qTP16pIo3f8a8AwAGj6/d8GyvopkG2S8JaQAxpmYeOxPs P4UcCAEItAxQqSD8AwZ0W6VamzAjXzs+h5ruZ9TTI2UqfmnSw+xiv3ucfeDSj52DHNqC/qjKYdo4n 2UsMqkuw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uMNXA-0000000AQVG-2q3B; Tue, 03 Jun 2025 09:02:12 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uMNUz-0000000AQ8s-07Lc; Tue, 03 Jun 2025 08:59:58 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id F1D695C4D13; Tue, 3 Jun 2025 08:57:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 75F96C4CEED; Tue, 3 Jun 2025 08:59:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748941195; bh=R50WQrCRCTILDFY9a5xYZZIKpDYGrHm9HaM9VrFd8qo=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=s5ewOc1IzJzHNkzRDAsQZ2xHPKpi2YS6kSkA/5HltTiaLiQYKfkEyIeNuN/jxhCsW s4B7+6SJeKjhbyKxZS5GYQuz62AkgQyCNTaU6bT8yUFr7Eci3zlYKpgUiUkqpmlqqK fh2u+coWSQxSjBhqF+dhVz6oYRfaF+KrxvCQCPcxL2phWj++C2qSMpAY/HYENGXQ1L 9Vcgg7HDzZvCkwOi+/YrcJl5mfmS0JOi4jh4zN0ufHStOdEUZfcKDN6yBLPd7ZTsd0 whGJBEPoXFGu/LvWJpVXuukKUKoiKXI3jO/HNH6ekNyxoxzJ9iSQ4jwwOreAinckRm cFzWJAyDlbW+w== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 33BE8380DBEC; Tue, 3 Jun 2025 09:00:29 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [net v3] net: wwan: t7xx: Fix napi rx poll issue From: patchwork-bot+netdevbpf@kernel.org Message-Id: <174894122801.1429658.207799656496074697.git-patchwork-notify@kernel.org> Date: Tue, 03 Jun 2025 09:00:28 +0000 References: <20250530031648.5592-1-jinjian.song@fibocom.com> In-Reply-To: <20250530031648.5592-1-jinjian.song@fibocom.com> To: Jinjian Song Cc: chandrashekar.devegowda@intel.com, chiranjeevi.rapolu@linux.intel.com, haijun.liu@mediatek.com, m.chetan.kumar@linux.intel.com, ricardo.martinez@linux.intel.com, loic.poulain@linaro.org, ryazanov.s.a@gmail.com, johannes@sipsolutions.net, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-doc@vger.kernel.org, angelogioacchino.delregno@collabora.com, linux-arm-kernel@lists.infradead.org, matthias.bgg@gmail.com, corbet@lwn.net, linux-mediatek@lists.infradead.org, helgaas@kernel.org, danielwinkler@google.com, andrew+netdev@lunn.ch, horms@kernel.org, sreehari.kancharla@linux.intel.com, ilpo.jarvinen@linux.intel.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250603_015957_114642_170F2DB8 X-CRM114-Status: UNSURE ( 9.02 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello: This patch was applied to netdev/net.git (main) by Paolo Abeni : On Fri, 30 May 2025 11:16:48 +0800 you wrote: > When driver handles the napi rx polling requests, the netdev might > have been released by the dellink logic triggered by the disconnect > operation on user plane. However, in the logic of processing skb in > polling, an invalid netdev is still being used, which causes a panic. > > BUG: kernel NULL pointer dereference, address: 00000000000000f1 > Oops: 0000 [#1] PREEMPT SMP NOPTI > RIP: 0010:dev_gro_receive+0x3a/0x620 > [...] > Call Trace: > > ? __die_body+0x68/0xb0 > ? page_fault_oops+0x379/0x3e0 > ? exc_page_fault+0x4f/0xa0 > ? asm_exc_page_fault+0x22/0x30 > ? __pfx_t7xx_ccmni_recv_skb+0x10/0x10 [mtk_t7xx (HASH:1400 7)] > ? dev_gro_receive+0x3a/0x620 > napi_gro_receive+0xad/0x170 > t7xx_ccmni_recv_skb+0x48/0x70 [mtk_t7xx (HASH:1400 7)] > t7xx_dpmaif_napi_rx_poll+0x590/0x800 [mtk_t7xx (HASH:1400 7)] > net_rx_action+0x103/0x470 > irq_exit_rcu+0x13a/0x310 > sysvec_apic_timer_interrupt+0x56/0x90 > > > [...] Here is the summary with links: - [net,v3] net: wwan: t7xx: Fix napi rx poll issue https://git.kernel.org/netdev/net/c/905fe0845bb2 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html