[ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.68' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 56.300412][ T6860] general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN [ 56.312164][ T6860] KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087] [ 56.320574][ T6860] CPU: 1 PID: 6860 Comm: syz-executor527 Not tainted 5.9.0-rc1-next-20200821-syzkaller #0 [ 56.330444][ T6860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.340489][ T6860] RIP: 0010:fib_dump_info+0x893/0x1f00 [ 56.345966][ T6860] Code: 3c 02 00 0f 85 83 15 00 00 4d 8b 6d 10 e8 25 2e aa fa 49 8d bd 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 62 15 00 00 4d 8b ad 80 00 00 00 e8 27 db 2a 01 [ 56.365547][ T6860] RSP: 0018:ffffc900011d7260 EFLAGS: 00010202 [ 56.371605][ T6860] RAX: dffffc0000000000 RBX: ffff8880a8964500 RCX: ffffffff86ca4463 [ 56.379562][ T6860] RDX: 0000000000000010 RSI: ffffffff86ca449b RDI: 0000000000000080 [ 56.387509][ T6860] RBP: ffff88809f57e817 R08: 0000000000000001 R09: ffff88809f57e82b [ 56.395457][ T6860] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809f57e800 [ 56.403419][ T6860] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a8ff00c0 [ 56.411369][ T6860] FS: 00000000009d7880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 56.420268][ T6860] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.426937][ T6860] CR2: 0000000020000004 CR3: 00000000a913d000 CR4: 00000000001506e0 [ 56.434900][ T6860] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.442863][ T6860] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.450807][ T6860] Call Trace: [ 56.454093][ T6860] ? fib_create_info+0x49e0/0x49e0 [ 56.459224][ T6860] ? __phys_addr+0x9a/0x110 [ 56.463838][ T6860] ? memset+0x20/0x40 [ 56.467841][ T6860] ? __alloc_skb+0x34a/0x550 [ 56.472419][ T6860] rtmsg_fib+0x318/0xdf0 [ 56.476734][ T6860] ? lock_downgrade+0x830/0x830 [ 56.481560][ T6860] ? notifier_call_chain+0x1a9/0x200 [ 56.486833][ T6860] ? fib_dump_info+0x1f00/0x1f00 [ 56.491764][ T6860] ? __atomic_notifier_call_chain+0xe7/0x180 [ 56.497720][ T6860] fib_table_insert+0x1383/0x1af0 [ 56.502727][ T6860] ? fib_route_seq_show+0xe10/0xe10 [ 56.507900][ T6860] ? __nla_validate+0x3c/0x50 [ 56.512568][ T6860] ? rtm_to_fib_config+0x703/0x1180 [ 56.517741][ T6860] ? fib_new_table+0xfb/0x460 [ 56.522400][ T6860] inet_rtm_newroute+0x109/0x1e0 [ 56.527313][ T6860] ? inet_rtm_delroute+0x350/0x350 [ 56.532408][ T6860] ? lock_is_held_type+0xbb/0xf0 [ 56.537334][ T6860] ? inet_rtm_delroute+0x350/0x350 [ 56.542435][ T6860] rtnetlink_rcv_msg+0x44e/0xad0 [ 56.547349][ T6860] ? rtnetlink_put_metrics+0x510/0x510 [ 56.552781][ T6860] ? lock_acquire+0x1f1/0xad0 [ 56.557431][ T6860] ? netlink_deliver_tap+0x146/0xb70 [ 56.562689][ T6860] netlink_rcv_skb+0x15a/0x430 [ 56.567428][ T6860] ? rtnetlink_put_metrics+0x510/0x510 [ 56.572861][ T6860] ? netlink_ack+0xa10/0xa10 [ 56.577424][ T6860] ? lock_is_held_type+0xbb/0xf0 [ 56.582336][ T6860] netlink_unicast+0x533/0x7d0 [ 56.587152][ T6860] ? netlink_attachskb+0x810/0x810 [ 56.592249][ T6860] ? _copy_from_iter_full+0x247/0x890 [ 56.597599][ T6860] ? __phys_addr+0x9a/0x110 [ 56.602084][ T6860] ? __phys_addr_symbol+0x2c/0x70 [ 56.607085][ T6860] ? __check_object_size+0x171/0x3e4 [ 56.612413][ T6860] netlink_sendmsg+0x856/0xd90 [ 56.617161][ T6860] ? netlink_unicast+0x7d0/0x7d0 [ 56.622078][ T6860] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 56.627340][ T6860] ? netlink_unicast+0x7d0/0x7d0 [ 56.632268][ T6860] sock_sendmsg+0xcf/0x120 [ 56.636678][ T6860] ____sys_sendmsg+0x6e8/0x810 [ 56.641519][ T6860] ? kernel_sendmsg+0x50/0x50 [ 56.646170][ T6860] ? do_recvmmsg+0x6d0/0x6d0 [ 56.650737][ T6860] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 56.656706][ T6860] ? release_sock+0x1b/0x1b0 [ 56.661272][ T6860] ___sys_sendmsg+0xf3/0x170 [ 56.665854][ T6860] ? sendmsg_copy_msghdr+0x160/0x160 [ 56.671114][ T6860] ? lock_downgrade+0x830/0x830 [ 56.675942][ T6860] ? lock_downgrade+0x830/0x830 [ 56.680785][ T6860] ? __might_fault+0x190/0x1d0 [ 56.685525][ T6860] ? _copy_to_user+0x126/0x160 [ 56.690263][ T6860] ? move_addr_to_user+0xb5/0x200 [ 56.695280][ T6860] ? __fget_light+0x215/0x280 [ 56.699933][ T6860] __sys_sendmsg+0xe5/0x1b0 [ 56.704429][ T6860] ? __sys_sendmsg_sock+0xb0/0xb0 [ 56.709434][ T6860] ? trace_hardirqs_on+0x5f/0x220 [ 56.714435][ T6860] ? lockdep_hardirqs_on+0x76/0xf0 [ 56.719521][ T6860] do_syscall_64+0x2d/0x70 [ 56.723915][ T6860] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 56.729783][ T6860] RIP: 0033:0x440549 [ 56.733672][ T6860] 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 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 56.753258][ T6860] RSP: 002b:00007ffdf81883f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 56.761661][ T6860] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440549 [ 56.769669][ T6860] RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000004 [ 56.777632][ T6860] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 56.785597][ T6860] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401d50 [ 56.793549][ T6860] R13: 0000000000401de0 R14: 0000000000000000 R15: 0000000000000000 [ 56.801519][ T6860] Modules linked in: [ 56.805762][ T6860] ---[ end trace 2badee4764e1c38d ]--- [ 56.811982][ T6860] RIP: 0010:fib_dump_info+0x893/0x1f00 [ 56.817495][ T6860] Code: 3c 02 00 0f 85 83 15 00 00 4d 8b 6d 10 e8 25 2e aa fa 49 8d bd 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 62 15 00 00 4d 8b ad 80 00 00 00 e8 27 db 2a 01 [ 56.837168][ T6860] RSP: 0018:ffffc900011d7260 EFLAGS: 00010202 [ 56.843349][ T6860] RAX: dffffc0000000000 RBX: ffff8880a8964500 RCX: ffffffff86ca4463 [ 56.851492][ T6860] RDX: 0000000000000010 RSI: ffffffff86ca449b RDI: 0000000000000080 [ 56.859450][ T6860] RBP: ffff88809f57e817 R08: 0000000000000001 R09: ffff88809f57e82b [ 56.867461][ T6860] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809f57e800 [ 56.875462][ T6860] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a8ff00c0 [ 56.883472][ T6860] FS: 00000000009d7880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 56.892432][ T6860] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.899022][ T6860] CR2: 00007f62d003f018 CR3: 00000000a913d000 CR4: 00000000001506e0 [ 56.907060][ T6860] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.915087][ T6860] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.923087][ T6860] Kernel panic - not syncing: Fatal exception [ 56.930340][ T6860] Kernel Offset: disabled [ 56.934657][ T6860] Rebooting in 86400 seconds..