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 X-Spam-Level: X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58B22C48BE6 for ; Mon, 14 Jun 2021 11:09:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4093761244 for ; Mon, 14 Jun 2021 11:09:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235241AbhFNLJX (ORCPT ); Mon, 14 Jun 2021 07:09:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:35246 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234654AbhFNK63 (ORCPT ); Mon, 14 Jun 2021 06:58:29 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4A39D61621; Mon, 14 Jun 2021 10:41:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1623667312; bh=Fc+crT+MQ7uPWXUWq37Qz0Bxk9fUg9q6YScfSXTxNFs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sdA/D+sBFdiGV+O+mbcKXJ8E9fLXZLSNm7AcDDU1J5Z/5TiPxFJp0cwJsEY/MQLN8 dGzmg4mi1QDxgo4FlQ9DneIWassG/mgeduxkQcWxEJ+LTA5uay01lfP8n1tIpkKncu YCKLjju4nqavQuiqHDduXPD6CHMSNTeY2Rg9E48s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zheyu Ma , "David S. Miller" , Sasha Levin Subject: [PATCH 5.10 023/131] net/qla3xxx: fix schedule while atomic in ql_sem_spinlock Date: Mon, 14 Jun 2021 12:26:24 +0200 Message-Id: <20210614102653.787719438@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210614102652.964395392@linuxfoundation.org> References: <20210614102652.964395392@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zheyu Ma [ Upstream commit 13a6f3153922391e90036ba2267d34eed63196fc ] When calling the 'ql_sem_spinlock', the driver has already acquired the spin lock, so the driver should not call 'ssleep' in atomic context. This bug can be fixed by using 'mdelay' instead of 'ssleep'. The KASAN's log reveals it: [ 3.238124 ] BUG: scheduling while atomic: swapper/0/1/0x00000002 [ 3.238748 ] 2 locks held by swapper/0/1: [ 3.239151 ] #0: ffff88810177b240 (&dev->mutex){....}-{3:3}, at: __device_driver_lock+0x41/0x60 [ 3.240026 ] #1: ffff888107c60e28 (&qdev->hw_lock){....}-{2:2}, at: ql3xxx_probe+0x2aa/0xea0 [ 3.240873 ] Modules linked in: [ 3.241187 ] irq event stamp: 460854 [ 3.241541 ] hardirqs last enabled at (460853): [] _raw_spin_unlock_irqrestore+0x4f/0x70 [ 3.242245 ] hardirqs last disabled at (460854): [] _raw_spin_lock_irqsave+0x2a/0x70 [ 3.242245 ] softirqs last enabled at (446076): [] __do_softirq+0x2e4/0x4b1 [ 3.242245 ] softirqs last disabled at (446069): [] irq_exit_rcu+0x100/0x110 [ 3.242245 ] Preemption disabled at: [ 3.242245 ] [] ql3xxx_probe+0x2aa/0xea0 [ 3.242245 ] Kernel panic - not syncing: scheduling while atomic [ 3.242245 ] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.13.0-rc1-00145 -gee7dc339169-dirty #16 [ 3.242245 ] Call Trace: [ 3.242245 ] dump_stack+0xba/0xf5 [ 3.242245 ] ? ql3xxx_probe+0x1f0/0xea0 [ 3.242245 ] panic+0x15a/0x3f2 [ 3.242245 ] ? vprintk+0x76/0x150 [ 3.242245 ] ? ql3xxx_probe+0x2aa/0xea0 [ 3.242245 ] __schedule_bug+0xae/0xe0 [ 3.242245 ] __schedule+0x72e/0xa00 [ 3.242245 ] schedule+0x43/0xf0 [ 3.242245 ] schedule_timeout+0x28b/0x500 [ 3.242245 ] ? del_timer_sync+0xf0/0xf0 [ 3.242245 ] ? msleep+0x2f/0x70 [ 3.242245 ] msleep+0x59/0x70 [ 3.242245 ] ql3xxx_probe+0x307/0xea0 [ 3.242245 ] ? _raw_spin_unlock_irqrestore+0x3a/0x70 [ 3.242245 ] ? pci_device_remove+0x110/0x110 [ 3.242245 ] local_pci_probe+0x45/0xa0 [ 3.242245 ] pci_device_probe+0x12b/0x1d0 [ 3.242245 ] really_probe+0x2a9/0x610 [ 3.242245 ] driver_probe_device+0x90/0x1d0 [ 3.242245 ] ? mutex_lock_nested+0x1b/0x20 [ 3.242245 ] device_driver_attach+0x68/0x70 [ 3.242245 ] __driver_attach+0x124/0x1b0 [ 3.242245 ] ? device_driver_attach+0x70/0x70 [ 3.242245 ] bus_for_each_dev+0xbb/0x110 [ 3.242245 ] ? rdinit_setup+0x45/0x45 [ 3.242245 ] driver_attach+0x27/0x30 [ 3.242245 ] bus_add_driver+0x1eb/0x2a0 [ 3.242245 ] driver_register+0xa9/0x180 [ 3.242245 ] __pci_register_driver+0x82/0x90 [ 3.242245 ] ? yellowfin_init+0x25/0x25 [ 3.242245 ] ql3xxx_driver_init+0x23/0x25 [ 3.242245 ] do_one_initcall+0x7f/0x3d0 [ 3.242245 ] ? rdinit_setup+0x45/0x45 [ 3.242245 ] ? rcu_read_lock_sched_held+0x4f/0x80 [ 3.242245 ] kernel_init_freeable+0x2aa/0x301 [ 3.242245 ] ? rest_init+0x2c0/0x2c0 [ 3.242245 ] kernel_init+0x18/0x190 [ 3.242245 ] ? rest_init+0x2c0/0x2c0 [ 3.242245 ] ? rest_init+0x2c0/0x2c0 [ 3.242245 ] ret_from_fork+0x1f/0x30 [ 3.242245 ] Dumping ftrace buffer: [ 3.242245 ] (ftrace buffer empty) [ 3.242245 ] Kernel Offset: disabled [ 3.242245 ] Rebooting in 1 seconds. Reported-by: Zheyu Ma Signed-off-by: Zheyu Ma Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/qlogic/qla3xxx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c index 27740c027681..a83b3d69a656 100644 --- a/drivers/net/ethernet/qlogic/qla3xxx.c +++ b/drivers/net/ethernet/qlogic/qla3xxx.c @@ -114,7 +114,7 @@ static int ql_sem_spinlock(struct ql3_adapter *qdev, value = readl(&port_regs->CommonRegs.semaphoreReg); if ((value & (sem_mask >> 16)) == sem_bits) return 0; - ssleep(1); + mdelay(1000); } while (--seconds); return -1; } -- 2.30.2