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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,URIBL_BLOCKED autolearn=ham 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 E0BB0C43387 for ; Sun, 30 Dec 2018 06:10:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A2904213F2 for ; Sun, 30 Dec 2018 06:10:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726048AbeL3GKF (ORCPT ); Sun, 30 Dec 2018 01:10:05 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:57063 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725981AbeL3GKF (ORCPT ); Sun, 30 Dec 2018 01:10:05 -0500 Received: by mail-io1-f72.google.com with SMTP id x2so28658635ioa.23 for ; Sat, 29 Dec 2018 22:10:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=+W3hb3OL6rwAqMwE+mpC6M8g9ozYCK5CP6x7gKp//00=; b=Jh++70OizMe6DPqpjiCGMzg1Hy9zdNikKn71InLJDpuC0VSeiubTOK9b5tuARhyK1O WweHLBLuCeOBsj4K8W3SOhTh0UmMHGORTdnVB1ygcRvhFUBUBhLh8z9JCf/Qgd1Ei8aS iAlBm7yv5G7VFS7tc2MVD4lxodb0oRevCRpQxoYASDKX0DulcLcD/GxHMzAe9LUJJFG0 0vYvVUKx2CNaGPG8TndelwO0GLofMRAJyhNRei9NszWbEBkn2FA5GiQNJCtEWa+1XA+m XDKaQiqlBeJkmHMYcFYkjHadv+HT4jlpI67myl4wyyG9ZDR2unin9snfJ+jopc3NtGtI BNcA== X-Gm-Message-State: AA+aEWb9+G1TQm9pm6TapGByE9GPRPbIewY0foFwyAoLj805kcVtySum Kh38zfcd9YEbqeRigWrZKWtPHeHhN4bGeKJWOUXfggFcOCkm X-Google-Smtp-Source: AFSGD/VtuUomOMV7+OXxGKcrXYxqoJ9wuee65vph/Lsc/NC/f0/CYfRxsEXncT9egDPmde+/x9MWg6B0lwSC2j2U/F6zUmu5nrFT MIME-Version: 1.0 X-Received: by 2002:a02:5c8:: with SMTP id 69mr25943502jal.20.1546150203786; Sat, 29 Dec 2018 22:10:03 -0800 (PST) Date: Sat, 29 Dec 2018 22:10:03 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000aa968f057e372583@google.com> Subject: BUG: unable to handle kernel paging request in sctp_v6_get_dst From: syzbot To: davem@davemloft.net, linux-kernel@vger.kernel.org, linux-sctp@vger.kernel.org, marcelo.leitner@gmail.com, netdev@vger.kernel.org, nhorman@tuxdriver.com, syzkaller-bugs@googlegroups.com, vyasevich@gmail.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 90cadbbf341d Merge git://git.kernel.org/pub/scm/linux/kern.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=1081829b400000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d41c8529d7e7362 dashboard link: https://syzkaller.appspot.com/bug?extid=ae70faffd84f05295f27 compiler: gcc (GCC) 8.0.1 20180413 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+ae70faffd84f05295f27@syzkaller.appspotmail.com dst_release: dst:000000006e60b654 refcnt:-1 dst_release: dst:000000006e60b654 refcnt:-1 BUG: unable to handle kernel paging request at ffffffffffff88f1 PGD 966d067 P4D 966d067 PUD 966f067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 26041 Comm: syz-executor2 Not tainted 4.20.0-rc7+ #360 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline] RIP: 0010:rt6_get_cookie include/net/ip6_fib.h:260 [inline] RIP: 0010:sctp_v6_get_dst+0x9d1/0x22d0 net/sctp/ipv6.c:379 Code: c1 ea 03 c6 04 02 00 48 8d 79 70 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 7e 18 00 00 48 8b 85 a8 fc ff ff 48 89 da 48 c1 ea 03 <4c> 8b 60 70 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 6f 18 RSP: 0018:ffff8881dac062b0 EFLAGS: 00010a02 RAX: ffffffffffff8881 RBX: ffff8881dac06510 RCX: ffffffffffff8881 RDX: 1ffff1103b580ca2 RSI: ffffffff874b895b RDI: ffffffffffff88f1 RBP: ffff8881dac06660 R08: ffff888194e86600 R09: ffffed103b585b77 R10: ffffed103b585b77 R11: ffff8881dac2dbbb R12: ffff8881b12a1d80 R13: dffffc0000000000 R14: ffffed103b580c7a R15: ffff8881dac065d0 FS: 00007f2d362c2700(0000) GS:ffff8881dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffff88f1 CR3: 00000001d1f76000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sctp_transport_route+0x132/0x360 net/sctp/transport.c:311 sctp_assoc_add_peer+0x5fd/0x10d0 net/sctp/associola.c:678 sctp_process_param net/sctp/sm_make_chunk.c:2543 [inline] sctp_process_init+0xfba/0x29c0 net/sctp/sm_make_chunk.c:2356 sctp_sf_do_5_1B_init+0x8e3/0xf70 net/sctp/sm_statefuns.c:416 sctp: [Deprecated]: syz-executor4 (pid 26043) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp_do_sm+0x1c1/0x7190 net/sctp/sm_sideeffect.c:1188 kobject: 'loop4' (000000007c488f81): kobject_uevent_env kobject: 'loop4' (000000007c488f81): fill_kobj_path: path = '/devices/virtual/block/loop4' sctp_endpoint_bh_rcv+0x465/0x960 net/sctp/endpointola.c:456 sctp_inq_push+0x280/0x370 net/sctp/inqueue.c:95 kobject: 'loop4' (000000007c488f81): kobject_uevent_env sctp_rcv+0x2e48/0x4150 net/sctp/input.c:271 kobject: 'loop4' (000000007c488f81): fill_kobj_path: path = '/devices/virtual/block/loop4' sctp6_rcv+0x15/0x30 net/sctp/ipv6.c:1065 ip6_protocol_deliver_rcu+0x372/0x1940 net/ipv6/ip6_input.c:394 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:434 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_input+0xe9/0x600 net/ipv6/ip6_input.c:443 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x17a/0x330 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0x115/0x640 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5083 process_backlog+0x217/0x760 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x7c5/0x1950 net/core/dev.c:6412 __do_softirq+0x30c/0xb2e kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027 do_softirq.part.13+0x126/0x160 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x21d/0x260 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:696 [inline] ip6_finish_output2+0xcef/0x2930 net/ipv6/ip6_output.c:121 ip6_finish_output+0x583/0xc50 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x232/0x9d0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ip6_xmit+0xf0d/0x24c0 net/ipv6/ip6_output.c:275 sctp_v6_xmit+0x385/0x760 net/sctp/ipv6.c:234 sctp_packet_transmit+0x1f05/0x3cd0 net/sctp/output.c:641 sctp_packet_singleton net/sctp/outqueue.c:787 [inline] sctp_outq_flush_ctrl.constprop.11+0x7a9/0xe50 net/sctp/outqueue.c:918 sctp_outq_flush+0x310/0x34f0 net/sctp/outqueue.c:1200 sctp_outq_uncork+0x6a/0x80 net/sctp/outqueue.c:772 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1820 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline] sctp_do_sm+0x5ff/0x7190 net/sctp/sm_sideeffect.c:1191 sctp_primitive_ASSOCIATE+0x9d/0xd0 net/sctp/primitive.c:88 sctp_sendmsg_to_asoc+0x52a/0x1a10 net/sctp/socket.c:1923 sctp_sendmsg+0x13c2/0x1da0 net/sctp/socket.c:2113 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 __sys_sendto+0x3d7/0x670 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto net/socket.c:1796 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457759 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2d362c1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457759 RDX: 0000000000000001 RSI: 000000002087dffe RDI: 0000000000000005 RBP: 000000000073bf00 R08: 000000002005ffe4 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d362c26d4 R13: 00000000004c4a7a R14: 00000000004d81c0 R15: 00000000ffffffff Modules linked in: CR2: ffffffffffff88f1 ---[ end trace a9e62d2e21808088 ]--- RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline] RIP: 0010:rt6_get_cookie include/net/ip6_fib.h:260 [inline] RIP: 0010:sctp_v6_get_dst+0x9d1/0x22d0 net/sctp/ipv6.c:379 Code: c1 ea 03 c6 04 02 00 48 8d 79 70 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 7e 18 00 00 48 8b 85 a8 fc ff ff 48 89 da 48 c1 ea 03 <4c> 8b 60 70 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 6f 18 RSP: 0018:ffff8881dac062b0 EFLAGS: 00010a02 RAX: ffffffffffff8881 RBX: ffff8881dac06510 RCX: ffffffffffff8881 RDX: 1ffff1103b580ca2 RSI: ffffffff874b895b RDI: ffffffffffff88f1 RBP: ffff8881dac06660 R08: ffff888194e86600 R09: ffffed103b585b77 R10: ffffed103b585b77 R11: ffff8881dac2dbbb R12: ffff8881b12a1d80 R13: dffffc0000000000 R14: ffffed103b580c7a R15: ffff8881dac065d0 FS: 00007f2d362c2700(0000) GS:ffff8881dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffff88f1 CR3: 00000001d1f76000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. 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