[ 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 '10.128.0.53' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 28.825629] netlink: 32 bytes leftover after parsing attributes in process `syz-executor293'. [ 28.837640] netlink: 32 bytes leftover after parsing attributes in process `syz-executor293'. [ 28.846647] netlink: 32 bytes leftover after parsing attributes in process `syz-executor293'. [ 28.855609] netlink: 32 bytes leftover after parsing attributes in process `syz-executor293'. [ 28.864788] netlink: 32 bytes leftover after parsing attributes in process `syz-executor293'. [ 28.875013] netlink: 32 bytes leftover after parsing attributes in process `syz-executor293'. [ 28.889865] kasan: CONFIG_KASAN_INLINE enabled [ 28.895892] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.904258] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.910492] Modules linked in: [ 28.913669] CPU: 1 PID: 8002 Comm: syz-executor293 Not tainted 4.14.203-syzkaller #0 [ 28.921528] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.930873] task: ffff8880b2a8c500 task.stack: ffff8880b4780000 [ 28.936959] RIP: 0010:__tcf_idr_release+0x15e/0x260 [ 28.941949] RSP: 0018:ffff8880b47874f0 EFLAGS: 00010206 [ 28.947306] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 28.954556] RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000048 [ 28.961826] RBP: ffff8880b36277a0 R08: ffffffff8b9bc4c8 R09: 0000000000000001 [ 28.969107] R10: 0000000000000000 R11: ffff8880b2a8c500 R12: 0000000000000000 [ 28.976355] R13: 00000000813cd0bc R14: 0000000000000000 R15: 0000000000000000 [ 28.983621] FS: 00007f9a98f58700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 28.991831] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.997710] CR2: 00007ffc8b0ead80 CR3: 00000000a4f03000 CR4: 00000000001406e0 [ 29.004967] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.012216] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.019464] Call Trace: [ 29.022040] tcf_action_destroy+0xed/0x170 [ 29.026254] tcf_action_init+0x294/0x400 [ 29.030292] ? tcf_action_init_1+0x9e0/0x9e0 [ 29.034685] ? finish_task_switch+0x178/0x610 [ 29.039158] ? finish_task_switch+0x14d/0x610 [ 29.043639] ? memset+0x20/0x40 [ 29.046910] ? nla_parse+0x157/0x1f0 [ 29.050601] tc_ctl_action+0x2e3/0x50f [ 29.054482] ? tca_action_gd+0x790/0x790 [ 29.058523] ? rtnetlink_rcv_msg+0x2e8/0xb10 [ 29.062909] ? tca_action_gd+0x790/0x790 [ 29.066956] rtnetlink_rcv_msg+0x3be/0xb10 [ 29.071172] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 29.075643] ? __netlink_lookup+0x345/0x5d0 [ 29.079950] netlink_rcv_skb+0x125/0x390 [ 29.084020] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 29.088501] ? netlink_ack+0x9a0/0x9a0 [ 29.092369] netlink_unicast+0x437/0x610 [ 29.096407] ? netlink_sendskb+0xd0/0xd0 [ 29.100539] ? __check_object_size+0x179/0x22c [ 29.105109] netlink_sendmsg+0x62e/0xb80 [ 29.109149] ? nlmsg_notify+0x170/0x170 [ 29.113099] ? kernel_recvmsg+0x210/0x210 [ 29.117222] ? security_socket_sendmsg+0x83/0xb0 [ 29.121972] ? nlmsg_notify+0x170/0x170 [ 29.125933] sock_sendmsg+0xb5/0x100 [ 29.129620] ___sys_sendmsg+0x6c8/0x800 [ 29.133582] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 29.138333] ? lock_downgrade+0x740/0x740 [ 29.142470] ? do_raw_spin_unlock+0x164/0x220 [ 29.146960] ? _raw_spin_unlock+0x29/0x40 [ 29.151085] ? do_huge_pmd_anonymous_page+0x732/0x1670 [ 29.156336] ? __fget+0x1fe/0x360 [ 29.159765] ? lock_acquire+0x170/0x3f0 [ 29.163718] ? lock_downgrade+0x740/0x740 [ 29.167851] ? __fget+0x225/0x360 [ 29.171278] ? __fdget+0x196/0x1f0 [ 29.174795] ? sockfd_lookup_light+0xb2/0x160 [ 29.179275] __sys_sendmsg+0xa3/0x120 [ 29.183144] ? SyS_shutdown+0x160/0x160 [ 29.187100] ? up_read+0x17/0x30 [ 29.190459] ? __do_page_fault+0x159/0xad0 [ 29.194672] SyS_sendmsg+0x27/0x40 [ 29.198190] ? __sys_sendmsg+0x120/0x120 [ 29.202247] do_syscall_64+0x1d5/0x640 [ 29.206118] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.211298] RIP: 0033:0x446c19 [ 29.214496] RSP: 002b:00007f9a98f57d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.222180] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446c19 [ 29.229427] RDX: 0000000000000000 RSI: 0000000020002980 RDI: 0000000000000003 [ 29.236693] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 29.243940] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 29.251201] R13: 0001008400000000 R14: 0000000000000000 R15: 053b003000000098 [ 29.258511] Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 fc 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 00 49 8d 7c 24 48 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c7 00 00 00 4d 8b 64 24 48 4d 85 e4 74 0e e8 [ 29.277604] RIP: __tcf_idr_release+0x15e/0x260 RSP: ffff8880b47874f0 [ 29.285110] ---[ end trace 06099b3100bf7700 ]--- [ 29.290032] Kernel panic - not syncing: Fatal exception [ 29.296140] Kernel Offset: disabled [ 29.299855] Rebooting in 86400 seconds..