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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7CD8C7EE23 for ; Wed, 10 May 2023 00:49:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235263AbjEJAtE (ORCPT ); Tue, 9 May 2023 20:49:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234919AbjEJAtD (ORCPT ); Tue, 9 May 2023 20:49:03 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5566240CE for ; Tue, 9 May 2023 17:48:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1683679692; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type; bh=DpVMeblzWLLNSO+KpVvlFMBDTVbc6pLPgEIf+DHTaPE=; b=RfvVmmDhshd72mPWBmxIW9T5nW0DPlgGS3Fyj+VPIM7ClbjAUCwtwkKHmks6pyhE0cybQS oSD3uXSRSBRAH2vjSOfM0eRHRb93+yRBc/Mk57nUeKqsfirSvcmh39gHG+UEznM9IZOy2w 02cYkdOj1+tgWyjAmvdKku6jir3lemY= Received: from mail-pj1-f72.google.com (mail-pj1-f72.google.com [209.85.216.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-465-rJzN6n8JMCCqp7K_PweCsg-1; Tue, 09 May 2023 20:48:11 -0400 X-MC-Unique: rJzN6n8JMCCqp7K_PweCsg-1 Received: by mail-pj1-f72.google.com with SMTP id 98e67ed59e1d1-24e2be731feso3588064a91.1 for ; Tue, 09 May 2023 17:48:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683679690; x=1686271690; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=DpVMeblzWLLNSO+KpVvlFMBDTVbc6pLPgEIf+DHTaPE=; b=SocnRbDYX3lsVGebWUx5VFsqZpAsPCjMZrCxhXHMLp6wukiOusPs6IIOySPHOx7JL6 pekrXL2hrQ0PGCJoURVKYCZtQguPcjRbIf7szWMrkUdftTp9UM4nE1onJ/XOGUjxXnoo 7NiUWJTwFuzAtb6iQEPEO8cMQFV0xvGSO49M2knGFdlTmWBwhCoU0I5RBoB21XoPbOTZ Pg4mkTnkfKyjESuA+lorzbIqiTzAekd+0SNWuf+zfKZQPgwbh2/9pg4CA2Ugl7yz4KfZ 8XV/rOspgAM/W1+JCPZKNJe2BfV+jWI5AFEe3udmbAVRcIlV2FIjxdqib3ggmV12F2OD sIMA== X-Gm-Message-State: AC+VfDwJ29DduYmfdYokRhdf2avnfBTBzwoX52N4wbuRSoCdUBjYyWor 3msgDniB0ydQsPRvBZuDNWl+o8svuW+on0SYUDCRnoDIUBJsXR4Y54lmaUsZ/6gnfljPf36gET9 WNlRikDjYsnXB1nYCIbcNlwCbOHdHaejRZh0= X-Received: by 2002:a17:90a:a681:b0:23f:582d:f45f with SMTP id d1-20020a17090aa68100b0023f582df45fmr15486710pjq.1.1683679689838; Tue, 09 May 2023 17:48:09 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ561Owgx5sEPjjOJq4ynZWpS6299R2MFKmfzOgmFOfGCK72En1Y6azFAWthRxybFxkzHwPBXKBTya4dSePxr3Y= X-Received: by 2002:a17:90a:a681:b0:23f:582d:f45f with SMTP id d1-20020a17090aa68100b0023f582df45fmr15486694pjq.1.1683679689490; Tue, 09 May 2023 17:48:09 -0700 (PDT) MIME-Version: 1.0 From: Guangwu Zhang Date: Wed, 10 May 2023 08:49:15 +0800 Message-ID: Subject: [bug report] BUG: kernel NULL pointer dereference, address: 0000000000000048 To: linux-block@vger.kernel.org, io-uring@vger.kernel.org, Jeff Moyer , Ming Lei Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hi, We found this kernel NULL pointer issue with latest linux-block/for-next, please check it. Kernel repo: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git [ 112.483804] BUG: kernel NULL pointer dereference, address: 0000000000000048 [ 112.490809] #PF: supervisor read access in kernel mode [ 112.495976] #PF: error_code(0x0000) - not-present page [ 112.501141] PGD 800000044d20c067 P4D 800000044d20c067 PUD 4734d5067 PMD 0 [ 112.508057] Oops: 0000 [#1] PREEMPT SMP PTI [ 112.512265] CPU: 24 PID: 7767 Comm: user-data Kdump: loaded Not tainted 6.4.0-rc1+ #1 [ 112.520141] Hardware name: HPE ProLiant DL380 Gen10/ProLiant DL380 Gen10, BIOS U30 06/20/2018 [ 112.528713] RIP: 0010:bfq_bio_bfqg+0x8/0x80 [ 112.532925] Code: 6b 70 48 89 43 60 5b 5d c3 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 41 54 53 <48> 8b 46 48 48 89 fb 48 89 f7 48 85 c0 74 26 48 63 15 72 40 6b 01 [ 112.551805] RSP: 0018:ffffaed687ef3b30 EFLAGS: 00010096 [ 112.557058] RAX: ffff9a90f2600000 RBX: ffff9a90f2600000 RCX: 0000000000000001 [ 112.564232] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9a90f2600000 [ 112.571408] RBP: ffff9a90c508d500 R08: ffff9a90e2b8a688 R09: ffff9a90e2b8a688 [ 112.578581] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 112.585756] R13: ffff9a90c508d500 R14: 0000000000000000 R15: 0000000000000000 [ 112.592930] FS: 00007fe41b0f0880(0000) GS:ffff9a94afc00000(0000) knlGS:0000000000000000 [ 112.601065] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 112.606842] CR2: 0000000000000048 CR3: 000000046346e005 CR4: 00000000007706e0 [ 112.614016] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 112.621189] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 112.628362] PKRU: 55555554 [ 112.631082] Call Trace: [ 112.633539] [ 112.635650] bfq_bic_update_cgroup+0x2c/0x240 [ 112.640033] bfq_init_rq+0xdd/0x670 [ 112.643545] ? blk_rq_map_user_iov+0xc5/0x2f0 [ 112.647931] bfq_insert_request.isra.0+0x5d/0x250 [ 112.652663] bfq_insert_requests+0x59/0x80 [ 112.656782] blk_mq_flush_plug_list+0x172/0x570 [ 112.661342] blk_add_rq_to_plug+0x45/0x150 [ 112.665462] nvme_uring_cmd_io+0x242/0x390 [nvme_core] [ 112.670652] io_uring_cmd+0x95/0x120 [ 112.674250] io_issue_sqe+0x199/0x3d0 [ 112.677932] io_submit_sqes+0x119/0x3d0 [ 112.681788] __do_sys_io_uring_enter+0x2c2/0x470 [ 112.686433] do_syscall_64+0x59/0x90 [ 112.690031] ? exc_page_fault+0x65/0x150 [ 112.693977] entry_SYSCALL_64_after_hwframe+0x72/0xdc [ 112.699057] RIP: 0033:0x7fe41ae3ee5d [ 112.702651] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 93 af 1b 00 f7 d8 64 89 01 48 [ 112.721530] RSP: 002b:00007ffc6fdebc28 EFLAGS: 00000206 ORIG_RAX: 00000000000001aa [ 112.729143] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe41ae3ee5d [ 112.736317] RDX: 0000000000000001 RSI: 0000000000000080 RDI: 0000000000000005 [ 112.743492] RBP: 00007ffc6fdec730 R08: 0000000000000000 R09: 0000000000000080 [ 112.750666] R10: 0000000000000001 R11: 0000000000000206 R12: 00007ffc6fdec848 [ 112.757841] R13: 0000000000401346 R14: 0000000000403de8 R15: 00007fe41b32c000 [ 112.765019]