[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.206' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.056157][ T6874] general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN [ 62.070150][ T6874] KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087] [ 62.078568][ T6874] CPU: 0 PID: 6874 Comm: syz-executor185 Not tainted 5.9.0-rc1-syzkaller #0 [ 62.087217][ T6874] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.097274][ T6874] RIP: 0010:fib_dump_info+0x893/0x1f00 [ 62.102718][ T6874] Code: 3c 02 00 0f 85 83 15 00 00 4d 8b 6d 10 e8 e5 a3 ab 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 97 e4 2a 01 [ 62.122312][ T6874] RSP: 0018:ffffc90000f07260 EFLAGS: 00010202 [ 62.128358][ T6874] RAX: dffffc0000000000 RBX: ffff8880a66b5a00 RCX: ffffffff86c89af3 [ 62.136342][ T6874] RDX: 0000000000000010 RSI: ffffffff86c89b2b RDI: 0000000000000080 [ 62.144296][ T6874] RBP: ffff88809a6a6817 R08: 0000000000000001 R09: ffff88809a6a682b [ 62.152253][ T6874] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809a6a6800 [ 62.160222][ T6874] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880922158c0 [ 62.168218][ T6874] FS: 0000000001024880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 62.177146][ T6874] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.183750][ T6874] CR2: 0000000020000004 CR3: 00000000a216b000 CR4: 00000000001506f0 [ 62.191721][ T6874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.199718][ T6874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.207685][ T6874] Call Trace: [ 62.210979][ T6874] ? fib_create_info+0x49e0/0x49e0 [ 62.216095][ T6874] ? __phys_addr+0x9a/0x110 [ 62.220598][ T6874] ? memset+0x20/0x40 [ 62.224567][ T6874] ? __alloc_skb+0x34a/0x550 [ 62.229140][ T6874] rtmsg_fib+0x318/0xdf0 [ 62.233381][ T6874] ? lock_downgrade+0x830/0x830 [ 62.238242][ T6874] ? notifier_call_chain+0x1a9/0x200 [ 62.243503][ T6874] ? fib_dump_info+0x1f00/0x1f00 [ 62.248423][ T6874] ? __atomic_notifier_call_chain+0xe7/0x180 [ 62.254390][ T6874] fib_table_insert+0x1383/0x1af0 [ 62.259420][ T6874] ? fib_route_seq_show+0xe10/0xe10 [ 62.264638][ T6874] ? __nla_validate+0x3c/0x50 [ 62.269329][ T6874] ? rtm_to_fib_config+0x703/0x1180 [ 62.274504][ T6874] ? fib_new_table+0xfb/0x460 [ 62.279171][ T6874] inet_rtm_newroute+0x109/0x1e0 [ 62.284130][ T6874] ? inet_rtm_delroute+0x350/0x350 [ 62.289223][ T6874] ? lock_is_held_type+0xbb/0xf0 [ 62.294170][ T6874] ? inet_rtm_delroute+0x350/0x350 [ 62.299276][ T6874] rtnetlink_rcv_msg+0x44e/0xad0 [ 62.304194][ T6874] ? rtnetlink_put_metrics+0x510/0x510 [ 62.309628][ T6874] ? lock_acquire+0x1f1/0xad0 [ 62.314280][ T6874] ? netlink_deliver_tap+0x146/0xb70 [ 62.319544][ T6874] netlink_rcv_skb+0x15a/0x430 [ 62.324283][ T6874] ? rtnetlink_put_metrics+0x510/0x510 [ 62.329714][ T6874] ? netlink_ack+0xa10/0xa10 [ 62.334304][ T6874] ? lock_is_held_type+0xbb/0xf0 [ 62.339218][ T6874] netlink_unicast+0x533/0x7d0 [ 62.343959][ T6874] ? netlink_attachskb+0x810/0x810 [ 62.349054][ T6874] ? _copy_from_iter_full+0x247/0x890 [ 62.354419][ T6874] ? __phys_addr+0x9a/0x110 [ 62.358897][ T6874] ? __phys_addr_symbol+0x2c/0x70 [ 62.363906][ T6874] ? __check_object_size+0x171/0x3e4 [ 62.369189][ T6874] netlink_sendmsg+0x856/0xd90 [ 62.373936][ T6874] ? netlink_unicast+0x7d0/0x7d0 [ 62.378849][ T6874] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 62.384113][ T6874] ? netlink_unicast+0x7d0/0x7d0 [ 62.389048][ T6874] sock_sendmsg+0xcf/0x120 [ 62.393442][ T6874] ____sys_sendmsg+0x6e8/0x810 [ 62.398182][ T6874] ? kernel_sendmsg+0x50/0x50 [ 62.402861][ T6874] ? do_recvmmsg+0x6d0/0x6d0 [ 62.407444][ T6874] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 62.413399][ T6874] ? release_sock+0x1b/0x1b0 [ 62.417976][ T6874] ___sys_sendmsg+0xf3/0x170 [ 62.422551][ T6874] ? sendmsg_copy_msghdr+0x160/0x160 [ 62.427813][ T6874] ? lock_downgrade+0x830/0x830 [ 62.432637][ T6874] ? lock_downgrade+0x830/0x830 [ 62.437471][ T6874] ? __might_fault+0x190/0x1d0 [ 62.442217][ T6874] ? _copy_to_user+0x126/0x160 [ 62.446959][ T6874] ? move_addr_to_user+0xb5/0x200 [ 62.451962][ T6874] ? __fget_light+0x215/0x280 [ 62.456626][ T6874] __sys_sendmsg+0xe5/0x1b0 [ 62.461116][ T6874] ? __sys_sendmsg_sock+0xb0/0xb0 [ 62.466129][ T6874] ? trace_hardirqs_on+0x5f/0x220 [ 62.471141][ T6874] ? lockdep_hardirqs_on+0x76/0xf0 [ 62.476237][ T6874] do_syscall_64+0x2d/0x70 [ 62.480630][ T6874] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.486628][ T6874] RIP: 0033:0x440549 [ 62.490506][ T6874] 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 [ 62.510181][ T6874] RSP: 002b:00007ffd84f061e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.518568][ T6874] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440549 [ 62.526531][ T6874] RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000004 [ 62.534478][ T6874] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 62.542478][ T6874] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401d50 [ 62.550432][ T6874] R13: 0000000000401de0 R14: 0000000000000000 R15: 0000000000000000 [ 62.558407][ T6874] Modules linked in: [ 62.563120][ T6874] ---[ end trace 8f6c443d607ba182 ]--- [ 62.568587][ T6874] RIP: 0010:fib_dump_info+0x893/0x1f00 [ 62.574350][ T6874] Code: 3c 02 00 0f 85 83 15 00 00 4d 8b 6d 10 e8 e5 a3 ab 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 97 e4 2a 01 [ 62.594010][ T6874] RSP: 0018:ffffc90000f07260 EFLAGS: 00010202 [ 62.600086][ T6874] RAX: dffffc0000000000 RBX: ffff8880a66b5a00 RCX: ffffffff86c89af3 [ 62.608194][ T6874] RDX: 0000000000000010 RSI: ffffffff86c89b2b RDI: 0000000000000080 [ 62.616218][ T6874] RBP: ffff88809a6a6817 R08: 0000000000000001 R09: ffff88809a6a682b [ 62.624227][ T6874] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809a6a6800 [ 62.632191][ T6874] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880922158c0 [ 62.640275][ T6874] FS: 0000000001024880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 62.649289][ T6874] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.657589][ T6874] CR2: 0000000020000004 CR3: 00000000a216b000 CR4: 00000000001506f0 [ 62.665611][ T6874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.673621][ T6874] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.681604][ T6874] Kernel panic - not syncing: Fatal exception [ 62.688656][ T6874] Kernel Offset: disabled [ 62.692975][ T6874] Rebooting in 86400 seconds..