lkml.org 
[lkml]   [2019]   [Feb]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    Subjectgeneral protection fault in ip6erspan_set_version
    From
    Hello,

    syzbot found the following crash on:

    HEAD commit: cb916fc5eabf Add linux-next specific files for 20190218
    git tree: linux-next
    console output: https://syzkaller.appspot.com/x/log.txt?x=15111104c00000
    kernel config: https://syzkaller.appspot.com/x/.config?x=6ef0fb4978ed6ac0
    dashboard link: https://syzkaller.appspot.com/bug?extid=30191cf1057abd3064af
    compiler: gcc (GCC) 9.0.0 20181231 (experimental)
    syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1198a582c00000
    C reproducer: https://syzkaller.appspot.com/x/repro.c?x=142f37bcc00000

    IMPORTANT: if you fix the bug, please add the following tag to the commit:
    Reported-by: syzbot+30191cf1057abd3064af@syzkaller.appspotmail.com

    kasan: CONFIG_KASAN_INLINE enabled
    kasan: GPF could be caused by NULL-ptr deref or user memory access
    general protection fault: 0000 [#1] PREEMPT SMP KASAN
    CPU: 1 PID: 7549 Comm: syz-executor432 Not tainted 5.0.0-rc6-next-20190218
    #37
    Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
    Google 01/01/2011
    RIP: 0010:ip6erspan_set_version+0x5c/0x350 net/ipv6/ip6_gre.c:1726
    Code: 07 38 d0 7f 08 84 c0 0f 85 9f 02 00 00 49 8d bc 24 b0 00 00 00 c6 43
    54 01 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f
    85 9a 02 00 00 4d 8b ac 24 b0 00 00 00 4d 85 ed 0f
    RSP: 0018:ffff888089ed7168 EFLAGS: 00010202
    RAX: dffffc0000000000 RBX: ffff8880869d6e58 RCX: 0000000000000000
    RDX: 0000000000000016 RSI: ffffffff862736b4 RDI: 00000000000000b0
    RBP: ffff888089ed7180 R08: 1ffff11010d3adcb R09: ffff8880869d6e58
    R10: ffffed1010d3add5 R11: ffff8880869d6eaf R12: 0000000000000000
    R13: ffffffff8931f8c0 R14: ffffffff862825d0 R15: ffff8880869d6e58
    FS: 0000000000b3d880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 0000000020000184 CR3: 0000000092cc5000 CR4: 00000000001406e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
    ip6erspan_newlink+0x66/0x7b0 net/ipv6/ip6_gre.c:2210
    __rtnl_newlink+0x107b/0x16c0 net/core/rtnetlink.c:3176
    rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3234
    rtnetlink_rcv_msg+0x465/0xb00 net/core/rtnetlink.c:5192
    netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2485
    rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5210
    netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
    netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1336
    netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1925
    sock_sendmsg_nosec net/socket.c:621 [inline]
    sock_sendmsg+0xdd/0x130 net/socket.c:631
    ___sys_sendmsg+0x806/0x930 net/socket.c:2136
    __sys_sendmsg+0x105/0x1d0 net/socket.c:2174
    __do_sys_sendmsg net/socket.c:2183 [inline]
    __se_sys_sendmsg net/socket.c:2181 [inline]
    __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2181
    do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
    entry_SYSCALL_64_after_hwframe+0x49/0xbe
    RIP: 0033:0x440159
    Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
    RSP: 002b:00007fffa69156e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
    RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159
    RDX: 0000000000000000 RSI: 0000000020001340 RDI: 0000000000000003
    RBP: 00000000006ca018 R08: 0000000000000001 R09: 00000000004002c8
    R10: 0000000000000011 R11: 0000000000000246 R12: 00000000004019e0
    R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000
    Modules linked in:
    ---[ end trace 09f8a7d13b4faaa1 ]---
    RIP: 0010:ip6erspan_set_version+0x5c/0x350 net/ipv6/ip6_gre.c:1726
    Code: 07 38 d0 7f 08 84 c0 0f 85 9f 02 00 00 49 8d bc 24 b0 00 00 00 c6 43
    54 01 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f
    85 9a 02 00 00 4d 8b ac 24 b0 00 00 00 4d 85 ed 0f
    RSP: 0018:ffff888089ed7168 EFLAGS: 00010202
    RAX: dffffc0000000000 RBX: ffff8880869d6e58 RCX: 0000000000000000
    RDX: 0000000000000016 RSI: ffffffff862736b4 RDI: 00000000000000b0
    RBP: ffff888089ed7180 R08: 1ffff11010d3adcb R09: ffff8880869d6e58
    R10: ffffed1010d3add5 R11: ffff8880869d6eaf R12: 0000000000000000
    R13: ffffffff8931f8c0 R14: ffffffff862825d0 R15: ffff8880869d6e58
    FS: 0000000000b3d880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 0000000020000184 CR3: 0000000092cc5000 CR4: 00000000001406e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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

    \
     
     \ /
      Last update: 2019-02-19 22:57    [W:2.519 / U:0.004 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site