[ 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 '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.865010][ T6828] general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN [ 45.876725][ T6828] KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087] [ 45.885103][ T6828] CPU: 0 PID: 6828 Comm: syz-executor851 Not tainted 5.9.0-rc1-syzkaller #0 [ 45.893737][ T6828] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.903769][ T6828] RIP: 0010:fib_dump_info+0x9cc/0x23b0 [ 45.909194][ T6828] Code: 00 fc ff df 80 3c 08 00 74 12 48 89 df e8 ec a9 b3 fa 48 b9 00 00 00 00 00 fc ff df 48 8b 1b 48 83 eb 80 48 89 d8 48 c1 e8 03 <80> 3c 08 00 74 08 48 89 df e8 c6 a9 b3 fa 48 8b 1b e8 ae c9 28 01 [ 45.928767][ T6828] RSP: 0018:ffffc900012774d0 EFLAGS: 00010202 [ 45.934819][ T6828] RAX: 0000000000000010 RBX: 0000000000000080 RCX: dffffc0000000000 [ 45.942760][ T6828] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 45.950802][ T6828] RBP: 0000000000000000 R08: ffffffff870124ed R09: ffffed1013ce6c06 [ 45.958738][ T6828] R10: ffffed1013ce6c06 R11: 0000000000000000 R12: ffff88809f868bc0 [ 45.966674][ T6828] R13: ffff88809e736015 R14: 1ffff11013ce6c02 R15: ffff88809e736000 [ 45.974614][ T6828] FS: 0000000000dd5880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 45.983507][ T6828] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.990057][ T6828] CR2: 0000000020000004 CR3: 0000000094d31000 CR4: 00000000001506f0 [ 45.998025][ T6828] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.005982][ T6828] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.013932][ T6828] Call Trace: [ 46.017195][ T6828] ? __alloc_skb+0x380/0x4f0 [ 46.021756][ T6828] rtmsg_fib+0x5c5/0x9e0 [ 46.025969][ T6828] ? __atomic_notifier_call_chain+0x2a4/0x2c0 [ 46.032016][ T6828] fib_table_insert+0x11c6/0x24c0 [ 46.037015][ T6828] inet_rtm_newroute+0xd3/0x1c0 [ 46.041837][ T6828] ? fib_del_ifaddr+0x1430/0x1430 [ 46.046829][ T6828] rtnetlink_rcv_msg+0x889/0xd40 [ 46.051743][ T6828] ? lock_acquire+0x160/0x730 [ 46.056398][ T6828] ? rcu_lock_acquire+0x5/0x30 [ 46.061146][ T6828] netlink_rcv_skb+0x190/0x3a0 [ 46.065891][ T6828] ? rtnetlink_bind+0x80/0x80 [ 46.070550][ T6828] netlink_unicast+0x786/0x940 [ 46.075294][ T6828] netlink_sendmsg+0xa57/0xd70 [ 46.080037][ T6828] ? netlink_getsockopt+0x9e0/0x9e0 [ 46.085201][ T6828] ____sys_sendmsg+0x519/0x800 [ 46.089933][ T6828] ? import_iovec+0x12a/0x2c0 [ 46.094577][ T6828] __sys_sendmsg+0x2b1/0x360 [ 46.099139][ T6828] ? _copy_to_user+0x100/0x140 [ 46.103870][ T6828] ? move_addr_to_user+0x17e/0x1e0 [ 46.108947][ T6828] ? __sys_getsockname+0x1af/0x220 [ 46.114047][ T6828] ? lock_is_held_type+0xb3/0xe0 [ 46.118969][ T6828] ? syscall_enter_from_user_mode+0x24/0x190 [ 46.124919][ T6828] ? lockdep_hardirqs_on+0x49/0xf0 [ 46.130004][ T6828] ? syscall_enter_from_user_mode+0x24/0x190 [ 46.135949][ T6828] do_syscall_64+0x31/0x70 [ 46.140336][ T6828] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 46.146195][ T6828] RIP: 0033:0x440549 [ 46.150058][ T6828] 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 [ 46.169632][ T6828] RSP: 002b:00007ffd1e7b3238 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.178009][ T6828] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440549 [ 46.185965][ T6828] RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000004 [ 46.193904][ T6828] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 46.201855][ T6828] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401d50 [ 46.209806][ T6828] R13: 0000000000401de0 R14: 0000000000000000 R15: 0000000000000000 [ 46.217762][ T6828] Modules linked in: [ 46.222238][ T6828] ---[ end trace 2abe5d184caf2af6 ]--- [ 46.227698][ T6828] RIP: 0010:fib_dump_info+0x9cc/0x23b0 [ 46.233207][ T6828] Code: 00 fc ff df 80 3c 08 00 74 12 48 89 df e8 ec a9 b3 fa 48 b9 00 00 00 00 00 fc ff df 48 8b 1b 48 83 eb 80 48 89 d8 48 c1 e8 03 <80> 3c 08 00 74 08 48 89 df e8 c6 a9 b3 fa 48 8b 1b e8 ae c9 28 01 [ 46.252995][ T6828] RSP: 0018:ffffc900012774d0 EFLAGS: 00010202 [ 46.259035][ T6828] RAX: 0000000000000010 RBX: 0000000000000080 RCX: dffffc0000000000 [ 46.267061][ T6828] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 46.275057][ T6828] RBP: 0000000000000000 R08: ffffffff870124ed R09: ffffed1013ce6c06 [ 46.283056][ T6828] R10: ffffed1013ce6c06 R11: 0000000000000000 R12: ffff88809f868bc0 [ 46.291054][ T6828] R13: ffff88809e736015 R14: 1ffff11013ce6c02 R15: ffff88809e736000 [ 46.299013][ T6828] FS: 0000000000dd5880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 46.308021][ T6828] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.314775][ T6828] CR2: 0000000020000004 CR3: 0000000094d31000 CR4: 00000000001506f0 [ 46.322897][ T6828] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.330895][ T6828] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.338876][ T6828] Kernel panic - not syncing: Fatal exception [ 46.345977][ T6828] Kernel Offset: disabled [ 46.350284][ T6828] Rebooting in 86400 seconds..