[ 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 '10.128.1.128' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.819590] kasan: CONFIG_KASAN_INLINE enabled [ 34.824612] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.831962] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.838169] Modules linked in: [ 34.841344] CPU: 0 PID: 7988 Comm: syz-executor310 Not tainted 4.14.279-syzkaller #0 [ 34.849209] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.858540] task: ffff8880b3a62640 task.stack: ffff888095ee0000 [ 34.864577] RIP: 0010:ipt_init_target+0x97/0x250 [ 34.869309] RSP: 0018:ffff888095ee7160 EFLAGS: 00010202 [ 34.874755] RAX: 0000000000000005 RBX: dffffc0000000000 RCX: 0000000000000000 [ 34.882137] RDX: 0000000000000007 RSI: 0000000000000010 RDI: 000000000000002f [ 34.889406] RBP: 0000000000000010 R08: 0000000000000001 R09: ffffed1015ebe2e0 [ 34.896840] R10: ffff8880af5f1706 R11: 0000000000000000 R12: 1ffff11012bdce2f [ 34.904307] R13: ffff888095ee71e8 R14: 0000000000000010 R15: ffffffff89cdd000 [ 34.911596] FS: 000055555751d300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 34.919814] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.925672] CR2: 0000000020000b84 CR3: 00000000afa55000 CR4: 00000000003406f0 [ 34.934316] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.941565] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.948817] Call Trace: [ 34.951457] ? tcf_ipt_walker+0x200/0x200 [ 34.955594] ? __local_bh_enable_ip+0xc1/0x170 [ 34.960155] ? fs_reclaim_release+0xd0/0x110 [ 34.964547] ? memcpy+0x35/0x50 [ 34.968935] __tcf_ipt_init+0x48d/0xc00 [ 34.972901] ? ipt_init_target+0x250/0x250 [ 34.977137] ? tc_lookup_action_n+0xac/0xd0 [ 34.981702] ? lock_downgrade+0x740/0x740 [ 34.985842] tcf_ipt_init+0x43/0x50 [ 34.989467] tcf_action_init_1+0x51a/0x9e0 [ 34.994038] ? tcf_action_dump_old+0x80/0x80 [ 34.998784] ? nla_parse+0x157/0x1f0 [ 35.002651] tcf_action_init+0x26d/0x400 [ 35.006733] ? tcf_action_init_1+0x9e0/0x9e0 [ 35.011128] ? memset+0x20/0x40 [ 35.014413] ? nla_parse+0x157/0x1f0 [ 35.018110] tc_ctl_action+0x2e3/0x510 [ 35.021974] ? tca_action_gd+0x790/0x790 [ 35.026018] ? rtnetlink_rcv_msg+0x2e8/0xb10 [ 35.030407] ? tca_action_gd+0x790/0x790 [ 35.034544] rtnetlink_rcv_msg+0x3be/0xb10 [ 35.038765] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 35.043339] ? __netlink_lookup+0x345/0x5d0 [ 35.047665] netlink_rcv_skb+0x125/0x390 [ 35.051883] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 35.056360] ? netlink_ack+0x9a0/0x9a0 [ 35.060228] netlink_unicast+0x437/0x610 [ 35.064267] ? netlink_sendskb+0xd0/0xd0 [ 35.068306] ? __check_object_size+0x179/0x230 [ 35.072864] netlink_sendmsg+0x648/0xbc0 [ 35.076903] ? nlmsg_notify+0x1b0/0x1b0 [ 35.080854] ? kernel_recvmsg+0x210/0x210 [ 35.084980] ? security_socket_sendmsg+0x83/0xb0 [ 35.089712] ? nlmsg_notify+0x1b0/0x1b0 [ 35.093663] sock_sendmsg+0xb5/0x100 [ 35.097366] ___sys_sendmsg+0x6c8/0x800 [ 35.101318] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 35.106053] ? lock_downgrade+0x740/0x740 [ 35.110178] ? __lru_cache_add+0x178/0x250 [ 35.114393] ? do_raw_spin_unlock+0x164/0x220 [ 35.118869] ? _raw_spin_unlock+0x29/0x40 [ 35.122995] ? do_huge_pmd_anonymous_page+0x72e/0x1700 [ 35.128329] ? prep_transhuge_page+0xa0/0xa0 [ 35.132715] ? _raw_spin_unlock+0x29/0x40 [ 35.136955] ? __pmd_alloc+0x27f/0x3f0 [ 35.141441] ? __handle_mm_fault+0x80f/0x4620 [ 35.145915] ? lock_downgrade+0x740/0x740 [ 35.150045] ? vm_insert_page+0x7c0/0x7c0 [ 35.154172] ? __fdget+0x167/0x1f0 [ 35.157689] ? sockfd_lookup_light+0xb2/0x160 [ 35.162162] __sys_sendmsg+0xa3/0x120 [ 35.165939] ? SyS_shutdown+0x160/0x160 [ 35.169893] ? up_read+0x17/0x30 [ 35.173240] ? __do_page_fault+0x159/0xad0 [ 35.177451] SyS_sendmsg+0x27/0x40 [ 35.180969] ? __sys_sendmsg+0x120/0x120 [ 35.185009] do_syscall_64+0x1d5/0x640 [ 35.188995] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.194163] RIP: 0033:0x7f28544054e9 [ 35.197852] RSP: 002b:00007ffd7af7a588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 35.205540] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f28544054e9 [ 35.212917] RDX: 0000000000000000 RSI: 0000000020000380 RDI: 0000000000000003 [ 35.220293] RBP: 00007f28543c94d0 R08: 000000000000000c R09: 0000000000000000 [ 35.227555] R10: 0000000000000007 R11: 0000000000000246 R12: 00007f28543c9560 [ 35.234814] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.242075] Code: e8 7f dd 80 fb 31 c0 b9 0e 00 00 00 4c 8d ac 24 88 00 00 00 4c 89 ef f3 48 ab 48 8d 7d 1f 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <0f> b6 04 18 38 d0 7f 08 84 c0 0f 85 67 01 00 00 0f b6 55 1f 48 [ 35.261939] RIP: ipt_init_target+0x97/0x250 RSP: ffff888095ee7160 [ 35.272039] ---[ end trace 19d0e867eb046b2e ]--- [ 35.276838] Kernel panic - not syncing: Fatal exception [ 35.282446] Kernel Offset: disabled [ 35.286064] Rebooting in 86400 seconds..