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 27395ECAAD4 for ; Sat, 3 Sep 2022 11:15:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230360AbiICLPe (ORCPT ); Sat, 3 Sep 2022 07:15:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230332AbiICLPc (ORCPT ); Sat, 3 Sep 2022 07:15:32 -0400 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A6216E2D1 for ; Sat, 3 Sep 2022 04:15:29 -0700 (PDT) Received: by mail-io1-f70.google.com with SMTP id b21-20020a5d8915000000b0068aaf634432so2787132ion.20 for ; Sat, 03 Sep 2022 04:15:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date; bh=yy+lwjd7AR62brDcwzrE9i7LclpeqCg0V3x3Lzyxlg4=; b=n7hkVLTB2y8yvP4J/8kBiC8dj2Y6dA63zDhi7GpF39QvpLNtai2Ad4Zw1s+oQ/cvH8 GKN62BTkVm21lQaXbx5NY+1dTyWboB/+l+ZUPK7Qgcg0EH85xzOfTx1H5nB/kFCgGqjY FTYDq+L6AF9Euwj3fK8UZ7pFBlMKuNFd5bS+x3qCfYHCmFmowGFXF3p6oXFIPTt1NaoD KaKAErJ8rcS32tZOr1B71suNbKF/ogzS9n2KzRpIM82DgpP3JUFiVW49w5qgIOeJ6JnV Kv8q+DK500CIqOPQa/Krdm1f+hnXDMqI2VZqFcP/jGZhYEHv+HeCxgmCDh3Glesv1ag/ g8sg== X-Gm-Message-State: ACgBeo3Zglxpz1PCxDjBcYLfQiaexZPbGj8UhUEzw3uAHYeuAPU6fgFB ozYShoQSOY0p/wkpaG4cGD1FEfHmj3NtKwzuJKYKDMfIz7WH X-Google-Smtp-Source: AA6agR7sFjl20OjcwPk9Bv2JsbbjeglcTpIDgL4huWUXUZlEgBogeU6pNedM2ni8my5SongrvJssOQ7ApTyovaeTRlBdu8ASpA01 MIME-Version: 1.0 X-Received: by 2002:a05:6e02:b4a:b0:2f0:c6ca:110a with SMTP id f10-20020a056e020b4a00b002f0c6ca110amr2049354ilu.252.1662203728478; Sat, 03 Sep 2022 04:15:28 -0700 (PDT) Date: Sat, 03 Sep 2022 04:15:28 -0700 In-Reply-To: <0000000000006efbd905e61a66f1@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c7cad805e7c3f663@google.com> Subject: Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in __rxe_do_task From: syzbot To: fgheet255t@gmail.com, jgg@ziepe.ca, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, lizhijian@fujitsu.com, netdev@vger.kernel.org, rpearsonhpe@gmail.com, syzkaller-bugs@googlegroups.com, yanjun.zhu@linux.dev, zyjzyj2000@gmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 05a5474efe93 Merge git://git.kernel.org/pub/scm/linux/kern.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=14e4bddb080000 kernel config: https://syzkaller.appspot.com/x/.config?x=892a57667b7af6cf dashboard link: https://syzkaller.appspot.com/bug?extid=ab99dc4c6e961eed8b8e compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17718427080000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/cdeb0ae7599a/disk-05a5474e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d59d928441e6/vmlinux-05a5474e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ab99dc4c6e961eed8b8e@syzkaller.appspotmail.com infiniband syz0: set active infiniband syz0: added ip6gre0 BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 1d64c067 P4D 1d64c067 PUD 22925067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3780 Comm: syz-executor.1 Not tainted 6.0.0-rc3-syzkaller-00123-g05a5474efe93 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000413eb40 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880776e25c8 RCX: 0000000000000000 RDX: ffff88807932bb00 RSI: ffffffff86d530bb RDI: 0000000000000000 RBP: ffffed100eedc4c8 R08: 0000000000000001 R09: ffff8880776e269f R10: ffffed100eedc4d3 R11: 0000000000000000 R12: 0000000000000000 R13: ffffed100eedc4c9 R14: ffff8880776e2640 R15: ffff8880776e2648 FS: 00007f1d65587700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000001bd9d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __rxe_do_task+0x56/0xc0 drivers/infiniband/sw/rxe/rxe_task.c:18 rxe_qp_do_cleanup+0x102/0x770 drivers/infiniband/sw/rxe/rxe_qp.c:800 execute_in_process_context+0x37/0x150 kernel/workqueue.c:3359 __rxe_cleanup+0x21a/0x400 drivers/infiniband/sw/rxe/rxe_pool.c:276 rxe_create_qp+0x2be/0x340 drivers/infiniband/sw/rxe/rxe_verbs.c:441 create_qp+0x5ac/0x960 drivers/infiniband/core/verbs.c:1233 ib_create_qp_kernel+0x9d/0x310 drivers/infiniband/core/verbs.c:1344 ib_create_qp include/rdma/ib_verbs.h:3732 [inline] create_mad_qp+0x177/0x2d0 drivers/infiniband/core/mad.c:2910 ib_mad_port_open drivers/infiniband/core/mad.c:2991 [inline] ib_mad_init_device+0xd51/0x13f0 drivers/infiniband/core/mad.c:3082 add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:721 enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1332 ib_register_device drivers/infiniband/core/device.c:1420 [inline] ib_register_device+0x83e/0xb20 drivers/infiniband/core/device.c:1366 rxe_register_device+0x2fe/0x3b0 drivers/infiniband/sw/rxe/rxe_verbs.c:1138 rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:521 rxe_newlink drivers/infiniband/sw/rxe/rxe.c:195 [inline] rxe_newlink+0xa9/0xd0 drivers/infiniband/sw/rxe/rxe.c:176 nldev_newlink+0x32e/0x5c0 drivers/infiniband/core/nldev.c:1717 rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195 rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 ____sys_sendmsg+0x6eb/0x810 net/socket.c:2482 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536 __sys_sendmsg+0xf3/0x1c0 net/socket.c:2565 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1d64489279 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1d65587168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1d6459bf80 RCX: 00007f1d64489279 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f1d644e32e9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd40d1b80f R14: 00007f1d65587300 R15: 0000000000022000 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000413eb40 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880776e25c8 RCX: 0000000000000000 RDX: ffff88807932bb00 RSI: ffffffff86d530bb RDI: 0000000000000000 RBP: ffffed100eedc4c8 R08: 0000000000000001 R09: ffff8880776e269f R10: ffffed100eedc4d3 R11: 0000000000000000 R12: 0000000000000000 R13: ffffed100eedc4c9 R14: ffff8880776e2640 R15: ffff8880776e2648 FS: 00007f1d65587700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000001bd9d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400