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1maeQI-000B9f-8W; Wed, 13 Oct 2021 15:35:58 +0200 Received: from [2001:1620:665:0:5795:5b0a:e5d5:5944] (helo=linux.fritz.box) by sslproxy02.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1maeQH-0002T3-Rr; Wed, 13 Oct 2021 15:35:57 +0200 Subject: Re: [syzbot] BUG: corrupted list in netif_napi_add To: syzbot , andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, davem@davemloft.net, hawk@kernel.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com References: <0000000000005639cd05ce3a6d4d@google.com> Cc: pabeni@redhat.com, toke@toke.dk, joamaki@gmail.com From: Daniel Borkmann Message-ID: Date: Wed, 13 Oct 2021 15:35:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <0000000000005639cd05ce3a6d4d@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.103.3/26321/Wed Oct 13 10:21:20 2021) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/13/21 1:40 PM, syzbot wrote: > Hello, > > syzbot found the following issue on: [ +Paolo/Toke wrt veth/XDP, +Jussi wrt bond/XDP, please take a look, thanks! ] > HEAD commit: 683f29b781ae Add linux-next specific files for 20211008 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=1525a614b00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=673b3589d970c > dashboard link: https://syzkaller.appspot.com/bug?extid=62e474dd92a35e3060d8 > 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=17c98e98b00000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+62e474dd92a35e3060d8@syzkaller.appspotmail.com > > IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready > list_add double add: new=ffff888023417160, prev=ffff88807de3a050, next=ffff888023417160. > ------------[ cut here ]------------ > kernel BUG at lib/list_debug.c:29! > invalid opcode: 0000 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 9490 Comm: syz-executor.1 Not tainted 5.15.0-rc4-next-20211008-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 > Code: b1 24 c3 fa 4c 89 e1 48 c7 c7 60 56 04 8a e8 f2 8c f1 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 a0 57 04 8a e8 db 8c f1 ff <0f> 0b 48 89 f1 48 c7 c7 20 57 04 8a 4c 89 e6 e8 c7 8c f1 ff 0f 0b > RSP: 0018:ffffc90002c26a48 EFLAGS: 00010286 > RAX: 0000000000000058 RBX: 0000000000000040 RCX: 0000000000000000 > RDX: ffff888023263a00 RSI: ffffffff815e0d78 RDI: fffff52000584d3b > RBP: ffff888023417160 R08: 0000000000000058 R09: 0000000000000000 > R10: ffffffff815dab5e R11: 0000000000000000 R12: ffff888023417160 > R13: ffff888023417000 R14: ffff888023417160 R15: ffff888023417160 > FS: 00007f841e9e8700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000000 CR3: 00000000601bd000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > __list_add_rcu include/linux/rculist.h:79 [inline] > list_add_rcu include/linux/rculist.h:106 [inline] > netif_napi_add+0x3fd/0x9c0 net/core/dev.c:6889 > veth_enable_xdp_range+0x1b1/0x300 drivers/net/veth.c:1009 > veth_enable_xdp+0x2a5/0x620 drivers/net/veth.c:1063 > veth_xdp_set drivers/net/veth.c:1483 [inline] > veth_xdp+0x4d4/0x780 drivers/net/veth.c:1523 > bond_xdp_set drivers/net/bonding/bond_main.c:5217 [inline] > bond_xdp+0x325/0x920 drivers/net/bonding/bond_main.c:5263 > dev_xdp_install+0xd5/0x270 net/core/dev.c:9365 > dev_xdp_attach+0x83d/0x1010 net/core/dev.c:9513 > dev_change_xdp_fd+0x246/0x300 net/core/dev.c:9753 > do_setlink+0x2fb4/0x3970 net/core/rtnetlink.c:2931 > rtnl_group_changelink net/core/rtnetlink.c:3242 [inline] > __rtnl_newlink+0xc06/0x1750 net/core/rtnetlink.c:3396 > rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3506 > rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572 > netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2491 > netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] > netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345 > netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1916 > sock_sendmsg_nosec net/socket.c:704 [inline] > sock_sendmsg+0xcf/0x120 net/socket.c:724 > ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409 > ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 > __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492 > 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+0x44/0xae > RIP: 0033:0x7f841f2718d9 > 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 bc ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f841e9e8188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 00007f841f375f60 RCX: 00007f841f2718d9 > RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 > RBP: 00007f841f2cbcb4 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007ffc8978d37f R14: 00007f841e9e8300 R15: 0000000000022000 > > Modules linked in: > ---[ end trace 7281cadbc8534f23 ]--- > RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 > Code: b1 24 c3 fa 4c 89 e1 48 c7 c7 60 56 04 8a e8 f2 8c f1 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 a0 57 04 8a e8 db 8c f1 ff <0f> 0b 48 89 f1 48 c7 c7 20 57 04 8a 4c 89 e6 e8 c7 8c f1 ff 0f 0b > RSP: 0018:ffffc90002c26a48 EFLAGS: 00010286 > RAX: 0000000000000058 RBX: 0000000000000040 RCX: 0000000000000000 > RDX: ffff888023263a00 RSI: ffffffff815e0d78 RDI: fffff52000584d3b > RBP: ffff888023417160 R08: 0000000000000058 R09: 0000000000000000 > R10: ffffffff815dab5e R11: 0000000000000000 R12: ffff888023417160 > R13: ffff888023417000 R14: ffff888023417160 R15: ffff888023417160 > FS: 00007f841e9e8700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000000 CR3: 00000000601bd000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this issue, for details see: > https://goo.gl/tpsmEJ#testing-patches >