lkml.org 
[lkml]   [2019]   [Aug]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    Subjectkernel BUG at include/linux/skbuff.h:LINE! (2)
    From
    Hello,

    syzbot found the following crash on:

    HEAD commit: 459c5fb4 Merge branch 'mscc-PTP-support'
    git tree: net-next
    console output: https://syzkaller.appspot.com/x/log.txt?x=13f2d33c600000
    kernel config: https://syzkaller.appspot.com/x/.config?x=d4cf1ffb87d590d7
    dashboard link: https://syzkaller.appspot.com/bug?extid=eb349eeee854e389c36d
    compiler: gcc (GCC) 9.0.0 20181231 (experimental)
    syz repro: https://syzkaller.appspot.com/x/repro.syz?x=111849e2600000
    C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1442c25a600000

    IMPORTANT: if you fix the bug, please add the following tag to the commit:
    Reported-by: syzbot+eb349eeee854e389c36d@syzkaller.appspotmail.com

    ------------[ cut here ]------------
    kernel BUG at include/linux/skbuff.h:2225!
    invalid opcode: 0000 [#1] PREEMPT SMP KASAN
    CPU: 0 PID: 9030 Comm: syz-executor649 Not tainted 5.3.0-rc3+ #134
    Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
    Google 01/01/2011
    RIP: 0010:__skb_pull include/linux/skbuff.h:2225 [inline]
    RIP: 0010:__skb_pull include/linux/skbuff.h:2222 [inline]
    RIP: 0010:skb_pull_inline include/linux/skbuff.h:2231 [inline]
    RIP: 0010:skb_pull+0xea/0x110 net/core/skbuff.c:1902
    Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 9c e5 dd fb 4c 89 e0
    5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 86 e5 dd fb <0f> 0b e8 df 13
    18 fc e9 44 ff ff ff e8 d5 13 18 fc eb 8a e8 ee 13
    RSP: 0018:ffff88808ac96e10 EFLAGS: 00010293
    RAX: ffff88809c546000 RBX: 0000000000000004 RCX: ffffffff8594a3a6
    RDX: 0000000000000000 RSI: ffffffff8594a3fa RDI: 0000000000000004
    RBP: ffff88808ac96e30 R08: ffff88809c546000 R09: fffffbfff14a8f4f
    R10: fffffbfff14a8f4e R11: ffffffff8a547a77 R12: 0000000095e28bcc
    R13: ffff88808ac97478 R14: 00000000ffff8880 R15: ffff88808ac97478
    FS: 0000555556549880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 0000000020000100 CR3: 0000000089c3c000 CR4: 00000000001406f0
    Call Trace:
    sctp_inq_pop+0x2f1/0xd80 net/sctp/inqueue.c:202
    sctp_endpoint_bh_rcv+0x184/0x8d0 net/sctp/endpointola.c:385
    sctp_inq_push+0x1e4/0x280 net/sctp/inqueue.c:80
    sctp_rcv+0x2807/0x3590 net/sctp/input.c:256
    sctp6_rcv+0x17/0x30 net/sctp/ipv6.c:1049
    ip6_protocol_deliver_rcu+0x2fe/0x1660 net/ipv6/ip6_input.c:397
    ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:438
    NF_HOOK include/linux/netfilter.h:305 [inline]
    NF_HOOK include/linux/netfilter.h:299 [inline]
    ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:447
    dst_input include/net/dst.h:442 [inline]
    ip6_sublist_rcv_finish+0x98/0x1e0 net/ipv6/ip6_input.c:84
    ip6_list_rcv_finish net/ipv6/ip6_input.c:118 [inline]
    ip6_sublist_rcv+0x80c/0xcf0 net/ipv6/ip6_input.c:282
    ipv6_list_rcv+0x373/0x4b0 net/ipv6/ip6_input.c:316
    __netif_receive_skb_list_ptype net/core/dev.c:5049 [inline]
    __netif_receive_skb_list_core+0x5fc/0x9d0 net/core/dev.c:5097
    __netif_receive_skb_list net/core/dev.c:5149 [inline]
    netif_receive_skb_list_internal+0x7eb/0xe60 net/core/dev.c:5244
    gro_normal_list.part.0+0x1e/0xb0 net/core/dev.c:5757
    gro_normal_list net/core/dev.c:5755 [inline]
    gro_normal_one net/core/dev.c:5769 [inline]
    napi_frags_finish net/core/dev.c:5782 [inline]
    napi_gro_frags+0xa6a/0xea0 net/core/dev.c:5855
    tun_get_user+0x2e98/0x3fa0 drivers/net/tun.c:1974
    tun_chr_write_iter+0xbd/0x156 drivers/net/tun.c:2020
    call_write_iter include/linux/fs.h:1870 [inline]
    do_iter_readv_writev+0x5f8/0x8f0 fs/read_write.c:693
    do_iter_write fs/read_write.c:970 [inline]
    do_iter_write+0x184/0x610 fs/read_write.c:951
    vfs_writev+0x1b3/0x2f0 fs/read_write.c:1015
    do_writev+0x15b/0x330 fs/read_write.c:1058
    __do_sys_writev fs/read_write.c:1131 [inline]
    __se_sys_writev fs/read_write.c:1128 [inline]
    __x64_sys_writev+0x75/0xb0 fs/read_write.c:1128
    do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
    entry_SYSCALL_64_after_hwframe+0x49/0xbe
    RIP: 0033:0x441b10
    Code: 05 48 3d 01 f0 ff ff 0f 83 5d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
    00 66 90 83 3d 01 95 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff
    ff 0f 83 34 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00
    RSP: 002b:00007ffe63706b88 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
    RAX: ffffffffffffffda RBX: 00007ffe63706ba0 RCX: 0000000000441b10
    RDX: 0000000000000001 RSI: 00007ffe63706bd0 RDI: 00000000000000f0
    RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004
    R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000122cb
    R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000
    Modules linked in:
    ---[ end trace c37566c1c02066db ]---
    RIP: 0010:__skb_pull include/linux/skbuff.h:2225 [inline]
    RIP: 0010:__skb_pull include/linux/skbuff.h:2222 [inline]
    RIP: 0010:skb_pull_inline include/linux/skbuff.h:2231 [inline]
    RIP: 0010:skb_pull+0xea/0x110 net/core/skbuff.c:1902
    Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 9c e5 dd fb 4c 89 e0
    5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 86 e5 dd fb <0f> 0b e8 df 13
    18 fc e9 44 ff ff ff e8 d5 13 18 fc eb 8a e8 ee 13
    RSP: 0018:ffff88808ac96e10 EFLAGS: 00010293
    RAX: ffff88809c546000 RBX: 0000000000000004 RCX: ffffffff8594a3a6
    RDX: 0000000000000000 RSI: ffffffff8594a3fa RDI: 0000000000000004
    RBP: ffff88808ac96e30 R08: ffff88809c546000 R09: fffffbfff14a8f4f
    R10: fffffbfff14a8f4e R11: ffffffff8a547a77 R12: 0000000095e28bcc
    R13: ffff88808ac97478 R14: 00000000ffff8880 R15: ffff88808ac97478
    FS: 0000555556549880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 0000000020000100 CR3: 0000000089c3c000 CR4: 00000000001406f0


    ---
    This bug 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 bug report. See:
    https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
    syzbot can test patches for this bug, for details see:
    https://goo.gl/tpsmEJ#testing-patches

    \
     
     \ /
      Last update: 2019-08-16 20:39    [W:6.352 / U:0.440 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site