From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6A9AA1E532; Fri, 28 Jun 2024 18:23:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719598994; cv=none; b=LyvsFVGRvkhNLqo7A4D4jMuvqGydAFL51FqkUTxAypeWTuOsaMqALgYgsDKhkaQ9bzxPsvm4yiKkcHV4NZ3EsoawOeTL+JjQPw6WNmjizHsbeWV8YAiZGRS84q6+adtcR5qgZwRSiLDbAJIv+x6wiS+2SHU+RlSU1faZ2u2TY2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719598994; c=relaxed/simple; bh=cb+WMxhhWTVOUFDmRnkqtfo3qZmA4hA8QTbiIA68f5o=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=awyPwvmUTNa4dgkIh8iTIwWAFsgoxtkMqgVeV94gcRBZwkJetjvibT7ndcDC2oIxb+BXQokumBszaoAa1X8YgWzkknQ1GOg4F6zqHHe4LlWrkUCSAU9PZXjZT7xlMkIK8s/r8GrlgfIuzYg2mTYI7K0SwoU3eKTAKxzpTOSU01Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AcxSceGu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AcxSceGu" Received: by smtp.kernel.org (Postfix) with ESMTPS id 0A3F3C32786; Fri, 28 Jun 2024 18:23:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719598994; bh=cb+WMxhhWTVOUFDmRnkqtfo3qZmA4hA8QTbiIA68f5o=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=AcxSceGu7L5XdsxF1/H+vDN69Np0bgoLh3iRplpaBdQA2NlqvJtVbwCUQxPlE3/k3 xlS9kRtssxDu4rkXRWZ9cSW1BrHJ5RiILa2b5Wff8OKw4TbByHcYXn65TdtaYYaMe/ 07kpwp3oq2C9KMTDUxFY73wssKY9P54E5rSF+NbZZgd/epB04Wu3q6rPv+pRLWbrhO 6/MNNpq60pnpDa3CBKhmDkErtRLXVKRlQ39VPGmkgV5Ltce2xtAI2pLXszArMtCfnT ODq1dogkS2+OaIelCgynZhW00Ap/rcAfKNXo+oDz82EjrqYIDieHRsuZdPvkVb0AO/ Xy2xPts8PggPQ== Received: from aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (localhost.localdomain [127.0.0.1]) by aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (Postfix) with ESMTP id EC5E7C4332E; Fri, 28 Jun 2024 18:23:13 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH] USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages From: patchwork-bot+bluetooth@kernel.org Message-Id: <171959899396.26186.528799806468905607.git-patchwork-notify@kernel.org> Date: Fri, 28 Jun 2024 18:23:13 +0000 References: <29855215-52f5-4385-b058-91f42c2bee18@rowland.harvard.edu> In-Reply-To: <29855215-52f5-4385-b058-91f42c2bee18@rowland.harvard.edu> To: Alan Stern Cc: gregkh@linuxfoundation.org, syzbot+1b2abad17596ad03dcff@syzkaller.appspotmail.com, syzbot+5f996b83575ef4058638@syzkaller.appspotmail.com, johan.hedberg@gmail.com, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org, syzkaller-bugs@googlegroups.com Hello: This patch was applied to bluetooth/bluetooth-next.git (master) by Greg Kroah-Hartman : On Thu, 13 Jun 2024 21:30:43 -0400 you wrote: > The syzbot fuzzer found that the interrupt-URB completion callback in > the cdc-wdm driver was taking too long, and the driver's immediate > resubmission of interrupt URBs with -EPROTO status combined with the > dummy-hcd emulation to cause a CPU lockup: > > > cdc_wdm 1-1:1.0: nonzero urb status received: -71 > cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes > watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor782:6625] > CPU#0 Utilization every 4s during lockup: > #1: 98% system, 0% softirq, 3% hardirq, 0% idle > #2: 98% system, 0% softirq, 3% hardirq, 0% idle > #3: 98% system, 0% softirq, 3% hardirq, 0% idle > #4: 98% system, 0% softirq, 3% hardirq, 0% idle > #5: 98% system, 1% softirq, 3% hardirq, 0% idle > Modules linked in: > irq event stamp: 73096 > hardirqs last enabled at (73095): [] console_emit_next_record kernel/printk/printk.c:2935 [inline] > hardirqs last enabled at (73095): [] console_flush_all+0x650/0xb74 kernel/printk/printk.c:2994 > hardirqs last disabled at (73096): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] > hardirqs last disabled at (73096): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 > softirqs last enabled at (73048): [] softirq_handle_end kernel/softirq.c:400 [inline] > softirqs last enabled at (73048): [] handle_softirqs+0xa60/0xc34 kernel/softirq.c:582 > softirqs last disabled at (73043): [] __do_softirq+0x14/0x20 kernel/softirq.c:588 > CPU: 0 PID: 6625 Comm: syz-executor782 Tainted: G W 6.10.0-rc2-syzkaller-g8867bbd4a056 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 > > [...] Here is the summary with links: - USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages https://git.kernel.org/bluetooth/bluetooth-next/c/22f008128625 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html