[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.61' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.633187][ T6830] general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN [ 65.644926][ T6830] KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087] [ 65.653347][ T6830] CPU: 0 PID: 6830 Comm: syz-executor644 Not tainted 5.9.0-rc1-syzkaller #0 [ 65.662052][ T6830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.672411][ T6830] RIP: 0010:fib_dump_info+0x893/0x1f00 [ 65.677870][ T6830] Code: 3c 02 00 0f 85 83 15 00 00 4d 8b 6d 10 e8 85 f1 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 37 e2 2a 01 [ 65.697573][ T6830] RSP: 0018:ffffc90001d37248 EFLAGS: 00010202 [ 65.703638][ T6830] RAX: dffffc0000000000 RBX: ffff888093b02000 RCX: ffffffff86c84d53 [ 65.711636][ T6830] RDX: 0000000000000010 RSI: ffffffff86c84d8b RDI: 0000000000000080 [ 65.719716][ T6830] RBP: ffff88809f95a017 R08: 0000000000000001 R09: ffff88809f95a02b [ 65.727693][ T6830] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809f95a000 [ 65.735650][ T6830] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a7164a40 [ 65.743616][ T6830] FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:0000000009af2840 [ 65.752559][ T6830] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 65.759131][ T6830] CR2: 0000000020000300 CR3: 0000000099698000 CR4: 00000000001506f0 [ 65.767095][ T6830] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.775066][ T6830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.783018][ T6830] Call Trace: [ 65.786295][ T6830] ? fib_create_info+0x49e0/0x49e0 [ 65.791396][ T6830] ? __phys_addr+0x9a/0x110 [ 65.795907][ T6830] ? memset+0x20/0x40 [ 65.799886][ T6830] ? __alloc_skb+0x34a/0x550 [ 65.804459][ T6830] rtmsg_fib+0x318/0xdf0 [ 65.808708][ T6830] ? lock_downgrade+0x830/0x830 [ 65.813573][ T6830] ? notifier_call_chain+0x1a9/0x200 [ 65.818844][ T6830] ? fib_dump_info+0x1f00/0x1f00 [ 65.823773][ T6830] ? __atomic_notifier_call_chain+0xe7/0x180 [ 65.829770][ T6830] fib_table_insert+0x1383/0x1af0 [ 65.834790][ T6830] ? fib_route_seq_show+0xe10/0xe10 [ 65.840224][ T6830] ? __nla_validate+0x3c/0x50 [ 65.844895][ T6830] ? rtm_to_fib_config+0x703/0x1180 [ 65.850104][ T6830] ? fib_new_table+0xfb/0x460 [ 65.854782][ T6830] inet_rtm_newroute+0x109/0x1e0 [ 65.859710][ T6830] ? inet_rtm_delroute+0x350/0x350 [ 65.864833][ T6830] ? lock_is_held_type+0xbb/0xf0 [ 65.869778][ T6830] ? inet_rtm_delroute+0x350/0x350 [ 65.874890][ T6830] rtnetlink_rcv_msg+0x44e/0xad0 [ 65.879822][ T6830] ? rtnetlink_put_metrics+0x510/0x510 [ 65.885272][ T6830] ? lock_acquire+0x1f1/0xad0 [ 65.889952][ T6830] ? netlink_deliver_tap+0x146/0xb70 [ 65.895233][ T6830] netlink_rcv_skb+0x15a/0x430 [ 65.899989][ T6830] ? rtnetlink_put_metrics+0x510/0x510 [ 65.905435][ T6830] ? netlink_ack+0xa10/0xa10 [ 65.910016][ T6830] ? lock_is_held_type+0xbb/0xf0 [ 65.914950][ T6830] netlink_unicast+0x533/0x7d0 [ 65.919738][ T6830] ? netlink_attachskb+0x810/0x810 [ 65.924842][ T6830] ? _copy_from_iter_full+0x247/0x890 [ 65.930202][ T6830] ? __phys_addr+0x9a/0x110 [ 65.934696][ T6830] ? __phys_addr_symbol+0x2c/0x70 [ 65.939709][ T6830] ? __check_object_size+0x171/0x3e4 [ 65.944997][ T6830] netlink_sendmsg+0x856/0xd90 [ 65.949752][ T6830] ? netlink_unicast+0x7d0/0x7d0 [ 65.954687][ T6830] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 65.959964][ T6830] ? netlink_unicast+0x7d0/0x7d0 [ 65.964898][ T6830] sock_sendmsg+0xcf/0x120 [ 65.969306][ T6830] ____sys_sendmsg+0x6e8/0x810 [ 65.974077][ T6830] ? kernel_sendmsg+0x50/0x50 [ 65.978744][ T6830] ? do_recvmmsg+0x6d0/0x6d0 [ 65.983329][ T6830] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 65.989359][ T6830] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 65.995349][ T6830] ? release_sock+0x1b/0x1b0 [ 65.999946][ T6830] ___sys_sendmsg+0xf3/0x170 [ 66.004635][ T6830] ? sendmsg_copy_msghdr+0x160/0x160 [ 66.009919][ T6830] ? lock_downgrade+0x830/0x830 [ 66.014761][ T6830] ? lock_downgrade+0x830/0x830 [ 66.019604][ T6830] ? __might_fault+0x190/0x1d0 [ 66.024354][ T6830] ? _copy_to_user+0x126/0x160 [ 66.029107][ T6830] ? move_addr_to_user+0xb5/0x200 [ 66.034138][ T6830] ? __fget_light+0x215/0x280 [ 66.038831][ T6830] __sys_sendmsg+0xe5/0x1b0 [ 66.043318][ T6830] ? __sys_sendmsg_sock+0xb0/0xb0 [ 66.048330][ T6830] ? trace_hardirqs_on+0x5f/0x220 [ 66.053342][ T6830] ? lockdep_hardirqs_on+0x76/0xf0 [ 66.058451][ T6830] __do_fast_syscall_32+0x57/0x80 [ 66.063522][ T6830] do_fast_syscall_32+0x2f/0x70 [ 66.068368][ T6830] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 66.074715][ T6830] RIP: 0023:0xf7f66549 [ 66.078771][ T6830] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 66.098376][ T6830] RSP: 002b:00000000ffba6bdc EFLAGS: 00000282 ORIG_RAX: 0000000000000172 [ 66.106788][ T6830] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000580 [ 66.114745][ T6830] RDX: 0000000000000000 RSI: 00000000080ea00c RDI: 0000000000000000 [ 66.122894][ T6830] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 66.130864][ T6830] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 66.138820][ T6830] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 66.146775][ T6830] Modules linked in: [ 66.162825][ T6830] ---[ end trace ca6d5d9f281019b7 ]--- [ 66.170028][ T6830] RIP: 0010:fib_dump_info+0x893/0x1f00 [ 66.175607][ T6830] Code: 3c 02 00 0f 85 83 15 00 00 4d 8b 6d 10 e8 85 f1 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 37 e2 2a 01 [ 66.195646][ T6830] RSP: 0018:ffffc90001d37248 EFLAGS: 00010202 [ 66.201726][ T6830] RAX: dffffc0000000000 RBX: ffff888093b02000 RCX: ffffffff86c84d53 [ 66.209770][ T6830] RDX: 0000000000000010 RSI: ffffffff86c84d8b RDI: 0000000000000080 [ 66.217815][ T6830] RBP: ffff88809f95a017 R08: 0000000000000001 R09: ffff88809f95a02b [ 66.225840][ T6830] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88809f95a000 [ 66.233876][ T6830] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a7164a40 [ 66.241967][ T6830] FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:0000000009af2840 [ 66.250981][ T6830] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 66.257626][ T6830] CR2: 00007f3f0e891000 CR3: 0000000099698000 CR4: 00000000001506f0 [ 66.265666][ T6830] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.273702][ T6830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.281678][ T6830] Kernel panic - not syncing: Fatal exception [ 66.289022][ T6830] Kernel Offset: disabled [ 66.293365][ T6830] Rebooting in 86400 seconds..