[ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.1.21' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.760014][ T6848] general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN [ 59.771864][ T6848] KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087] [ 59.780260][ T6848] CPU: 1 PID: 6848 Comm: syz-executor710 Not tainted 5.9.0-rc1-syzkaller #0 [ 59.788941][ T6848] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.799018][ T6848] RIP: 0010:fib_dump_info+0x893/0x1f00 [ 59.804562][ T6848] Code: 3c 02 00 0f 85 83 15 00 00 4d 8b 6d 10 e8 15 f6 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 57 e4 2a 01 [ 59.824180][ T6848] RSP: 0018:ffffc90000f67260 EFLAGS: 00010202 [ 59.830227][ T6848] RAX: dffffc0000000000 RBX: ffff888093c32100 RCX: ffffffff86c84b33 [ 59.838179][ T6848] RDX: 0000000000000010 RSI: ffffffff86c84b6b RDI: 0000000000000080 [ 59.846165][ T6848] RBP: ffff8880a5d28017 R08: 0000000000000001 R09: ffff8880a5d2802b [ 59.854127][ T6848] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a5d28000 [ 59.862085][ T6848] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880970d03c0 [ 59.870068][ T6848] FS: 0000000000fb6880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 59.879120][ T6848] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.889957][ T6848] CR2: 0000000020000004 CR3: 00000000a8363000 CR4: 00000000001506e0 [ 59.899170][ T6848] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.907169][ T6848] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.915688][ T6848] Call Trace: [ 59.918986][ T6848] ? fib_create_info+0x49e0/0x49e0 [ 59.925198][ T6848] ? __phys_addr+0x9a/0x110 [ 59.930755][ T6848] ? memset+0x20/0x40 [ 59.934725][ T6848] ? __alloc_skb+0x34a/0x550 [ 59.939300][ T6848] rtmsg_fib+0x318/0xdf0 [ 59.943573][ T6848] ? lock_downgrade+0x830/0x830 [ 59.948464][ T6848] ? notifier_call_chain+0x1a9/0x200 [ 59.953883][ T6848] ? fib_dump_info+0x1f00/0x1f00 [ 59.958808][ T6848] ? __atomic_notifier_call_chain+0xe7/0x180 [ 59.965381][ T6848] fib_table_insert+0x1383/0x1af0 [ 59.970529][ T6848] ? fib_route_seq_show+0xe10/0xe10 [ 59.975906][ T6848] ? __nla_validate+0x3c/0x50 [ 59.980611][ T6848] ? rtm_to_fib_config+0x703/0x1180 [ 59.986019][ T6848] ? fib_new_table+0xfb/0x460 [ 59.990689][ T6848] inet_rtm_newroute+0x109/0x1e0 [ 59.996057][ T6848] ? inet_rtm_delroute+0x350/0x350 [ 60.001255][ T6848] ? lock_is_held_type+0xbb/0xf0 [ 60.006413][ T6848] ? inet_rtm_delroute+0x350/0x350 [ 60.012417][ T6848] rtnetlink_rcv_msg+0x44e/0xad0 [ 60.017684][ T6848] ? rtnetlink_put_metrics+0x510/0x510 [ 60.023424][ T6848] ? lock_acquire+0x1f1/0xad0 [ 60.028418][ T6848] ? netlink_deliver_tap+0x146/0xb70 [ 60.033735][ T6848] netlink_rcv_skb+0x15a/0x430 [ 60.038664][ T6848] ? rtnetlink_put_metrics+0x510/0x510 [ 60.044317][ T6848] ? netlink_ack+0xa10/0xa10 [ 60.049005][ T6848] ? lock_is_held_type+0xbb/0xf0 [ 60.053997][ T6848] netlink_unicast+0x533/0x7d0 [ 60.059042][ T6848] ? netlink_attachskb+0x810/0x810 [ 60.064302][ T6848] ? _copy_from_iter_full+0x247/0x890 [ 60.069816][ T6848] ? __phys_addr+0x9a/0x110 [ 60.074567][ T6848] ? __phys_addr_symbol+0x2c/0x70 [ 60.080396][ T6848] ? __check_object_size+0x171/0x3e4 [ 60.085975][ T6848] netlink_sendmsg+0x856/0xd90 [ 60.093399][ T6848] ? netlink_unicast+0x7d0/0x7d0 [ 60.098996][ T6848] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 60.104676][ T6848] ? netlink_unicast+0x7d0/0x7d0 [ 60.110386][ T6848] sock_sendmsg+0xcf/0x120 [ 60.114978][ T6848] ____sys_sendmsg+0x6e8/0x810 [ 60.120235][ T6848] ? kernel_sendmsg+0x50/0x50 [ 60.125286][ T6848] ? do_recvmmsg+0x6d0/0x6d0 [ 60.130162][ T6848] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 60.136631][ T6848] ? release_sock+0x1b/0x1b0 [ 60.141454][ T6848] ___sys_sendmsg+0xf3/0x170 [ 60.146215][ T6848] ? sendmsg_copy_msghdr+0x160/0x160 [ 60.151781][ T6848] ? lock_downgrade+0x830/0x830 [ 60.156763][ T6848] ? lock_downgrade+0x830/0x830 [ 60.162246][ T6848] ? __might_fault+0x190/0x1d0 [ 60.167291][ T6848] ? _copy_to_user+0x126/0x160 [ 60.172177][ T6848] ? move_addr_to_user+0xb5/0x200 [ 60.178056][ T6848] ? __fget_light+0x215/0x280 [ 60.182888][ T6848] __sys_sendmsg+0xe5/0x1b0 [ 60.187679][ T6848] ? __sys_sendmsg_sock+0xb0/0xb0 [ 60.194072][ T6848] ? trace_hardirqs_on+0x5f/0x220 [ 60.200848][ T6848] ? lockdep_hardirqs_on+0x76/0xf0 [ 60.207041][ T6848] do_syscall_64+0x2d/0x70 [ 60.212530][ T6848] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.220255][ T6848] RIP: 0033:0x440549 [ 60.224528][ T6848] 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 [ 60.250433][ T6848] RSP: 002b:00007fffda8143a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 60.261470][ T6848] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440549 [ 60.271734][ T6848] RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000004 [ 60.282306][ T6848] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 60.292999][ T6848] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401d50 [ 60.304680][ T6848] R13: 0000000000401de0 R14: 0000000000000000 R15: 0000000000000000 [ 60.313741][ T6848] Modules linked in: [ 60.333334][ T6848] ---[ end trace e695255f232aca82 ]--- [ 60.338978][ T6848] RIP: 0010:fib_dump_info+0x893/0x1f00 [ 60.345234][ T6848] Code: 3c 02 00 0f 85 83 15 00 00 4d 8b 6d 10 e8 15 f6 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 57 e4 2a 01 [ 60.367014][ T6848] RSP: 0018:ffffc90000f67260 EFLAGS: 00010202 [ 60.374044][ T6848] RAX: dffffc0000000000 RBX: ffff888093c32100 RCX: ffffffff86c84b33 [ 60.383227][ T6848] RDX: 0000000000000010 RSI: ffffffff86c84b6b RDI: 0000000000000080 [ 60.391805][ T6848] RBP: ffff8880a5d28017 R08: 0000000000000001 R09: ffff8880a5d2802b [ 60.400291][ T6848] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a5d28000 [ 60.408940][ T6848] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880970d03c0 [ 60.417596][ T6848] FS: 0000000000fb6880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 60.431154][ T6848] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.438255][ T6848] CR2: 00007f3e13fea000 CR3: 00000000a8363000 CR4: 00000000001506e0 [ 60.447022][ T6848] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.455364][ T6848] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.463816][ T6848] Kernel panic - not syncing: Fatal exception [ 60.472267][ T6848] Kernel Offset: disabled [ 60.476684][ T6848] Rebooting in 86400 seconds..