[ 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 '10.128.0.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.584303] kasan: CONFIG_KASAN_INLINE enabled [ 33.591101] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.601460] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.608315] Modules linked in: [ 33.612006] CPU: 0 PID: 7961 Comm: syz-executor023 Not tainted 4.14.218-syzkaller #0 [ 33.622218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.632940] task: ffff8880980a2440 task.stack: ffff8880a6230000 [ 33.640972] RIP: 0010:nl802154_del_llsec_dev+0x13b/0x2e0 [ 33.647215] RSP: 0018:ffff8880a62376e0 EFLAGS: 00010246 [ 33.653669] RAX: dffffc0000000000 RBX: ffff8880b29807c0 RCX: 0000000000000000 [ 33.662209] RDX: 0000000000000000 RSI: ffff8880a6237850 RDI: ffff8880b29808d8 [ 33.670504] RBP: 1ffff11014c46ede R08: 0000000000000001 R09: ffff8880a6237990 [ 33.680331] R10: ffff8880a62376af R11: ffff8880980a2440 R12: ffff8882382f62c0 [ 33.688626] R13: ffff8880ab8b9010 R14: ffffffff886f1d00 R15: ffff8880aba5f040 [ 33.697305] FS: 000000000208e300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 33.707171] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.714387] CR2: 0000000020000408 CR3: 00000000b51ac000 CR4: 00000000001406f0 [ 33.722541] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.730988] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.739012] Call Trace: [ 33.741999] ? nl802154_del_llsec_key+0x2f0/0x2f0 [ 33.747430] ? validate_nla+0x192/0x5e0 [ 33.752180] ? nl802154_dump_wpan_phy_done+0x40/0x40 [ 33.758307] ? nla_parse+0x157/0x1f0 [ 33.762731] ? nl802154_dump_wpan_phy_done+0x40/0x40 [ 33.768498] genl_family_rcv_msg+0x572/0xb20 [ 33.773431] ? genl_rcv+0x40/0x40 [ 33.777649] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 33.783453] ? trace_hardirqs_on+0x10/0x10 [ 33.788439] ? sock_sendmsg+0xb5/0x100 [ 33.792507] genl_rcv_msg+0xaf/0x140 [ 33.796969] netlink_rcv_skb+0x125/0x390 [ 33.801645] ? genl_family_rcv_msg+0xb20/0xb20 [ 33.807124] ? netlink_ack+0x9a0/0x9a0 [ 33.812385] ? lock_acquire+0x170/0x3f0 [ 33.818469] genl_rcv+0x24/0x40 [ 33.822031] netlink_unicast+0x437/0x610 [ 33.826400] ? netlink_sendskb+0xd0/0xd0 [ 33.831058] ? __check_object_size+0x179/0x230 [ 33.836849] netlink_sendmsg+0x62e/0xb80 [ 33.842213] ? nlmsg_notify+0x170/0x170 [ 33.847379] ? kernel_recvmsg+0x210/0x210 [ 33.852040] ? security_socket_sendmsg+0x83/0xb0 [ 33.857553] ? nlmsg_notify+0x170/0x170 [ 33.861951] sock_sendmsg+0xb5/0x100 [ 33.866024] ___sys_sendmsg+0x6c8/0x800 [ 33.870381] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 33.875579] ? trace_hardirqs_on+0x10/0x10 [ 33.881550] ? trace_hardirqs_on+0x10/0x10 [ 33.886653] ? apparmor_file_alloc_security+0x129/0x800 [ 33.892677] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 33.898780] ? __lockdep_init_map+0x100/0x560 [ 33.903924] ? __fd_install+0x1ec/0x5c0 [ 33.908750] ? lock_acquire+0x170/0x3f0 [ 33.913528] ? lock_downgrade+0x740/0x740 [ 33.919032] ? __fdget+0x167/0x1f0 [ 33.923089] ? sockfd_lookup_light+0xb2/0x160 [ 33.927865] __sys_sendmsg+0xa3/0x120 [ 33.932102] ? SyS_shutdown+0x160/0x160 [ 33.937489] ? move_addr_to_kernel+0x60/0x60 [ 33.942333] SyS_sendmsg+0x27/0x40 [ 33.946436] ? __sys_sendmsg+0x120/0x120 [ 33.951539] do_syscall_64+0x1d5/0x640 [ 33.956007] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 33.962186] RIP: 0033:0x43f959 [ 33.965599] RSP: 002b:00007ffcfe40d3a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 33.974649] RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 000000000043f959 [ 33.983091] RDX: 0000000000008804 RSI: 0000000020000a00 RDI: 0000000000000006 [ 33.991685] RBP: 00000000004033c0 R08: 00000000004004a0 R09: 00000000004004a0 [ 33.999624] R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000403450 [ 34.008276] R13: 0000000000000000 R14: 00000000004ad018 R15: 00000000004004a0 [ 34.016692] Code: 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 96 01 00 00 48 8b 93 18 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 d1 48 c1 e9 03 <0f> b6 0c 01 48 89 d0 83 e0 07 83 c0 01 38 c8 7c 08 84 c9 0f 85 [ 34.040588] RIP: nl802154_del_llsec_dev+0x13b/0x2e0 RSP: ffff8880a62376e0 [ 34.056405] ---[ end trace 38b09e6ea78fc379 ]--- [ 34.061901] Kernel panic - not syncing: Fatal exception [ 34.071313] Kernel Offset: disabled [ 34.075970] Rebooting in 86400 seconds..