[ 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 '10.128.0.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.930589][ T28] audit: type=1400 audit(1593843472.912:8): avc: denied { execmem } for pid=6808 comm="syz-executor921" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 73.944697][ T6809] IPVS: ftp: loaded support on port[0] = 21 [ 73.987377][ T6809] netlink: 24 bytes leftover after parsing attributes in process `syz-executor921'. [ 74.037366][ T6809] device veth1 entered promiscuous mode [ 74.097839][ T6809] ------------[ cut here ]------------ [ 74.104101][ T6809] WARNING: CPU: 1 PID: 6809 at net/core/dev.c:8992 rollback_registered_many+0xbdb/0xf60 [ 74.116897][ T6809] Kernel panic - not syncing: panic_on_warn set ... [ 74.123678][ T6809] CPU: 1 PID: 6809 Comm: syz-executor921 Not tainted 5.8.0-rc3-syzkaller #0 [ 74.132762][ T6809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.143378][ T6809] Call Trace: [ 74.146658][ T6809] dump_stack+0x18f/0x20d [ 74.151067][ T6809] panic+0x2e3/0x75c [ 74.154948][ T6809] ? __warn_printk+0xf3/0xf3 [ 74.160255][ T6809] ? printk+0xba/0xed [ 74.164802][ T6809] ? log_store.cold+0x16/0x16 [ 74.169562][ T6809] ? do_syscall_64+0x60/0xe0 [ 74.174583][ T6809] ? __warn.cold+0x5/0x45 [ 74.179580][ T6809] ? __warn+0xd6/0x1f2 [ 74.183695][ T6809] ? rollback_registered_many+0xbdb/0xf60 [ 74.189412][ T6809] __warn.cold+0x20/0x45 [ 74.193638][ T6809] ? rollback_registered_many+0xbdb/0xf60 [ 74.199343][ T6809] report_bug+0x1bd/0x210 [ 74.203675][ T6809] handle_bug+0x38/0x90 [ 74.207811][ T6809] exc_invalid_op+0x13/0x40 [ 74.212292][ T6809] asm_exc_invalid_op+0x12/0x20 [ 74.217143][ T6809] RIP: 0010:rollback_registered_many+0xbdb/0xf60 [ 74.223456][ T6809] Code: 00 00 31 f6 4c 89 f7 e8 f3 d9 fc ff e9 4f fe ff ff 4c 89 e7 e9 48 fd ff ff e8 a1 5c 3e fb 0f 0b e9 da fd ff ff e8 95 5c 3e fb <0f> 0b e9 18 fe ff ff e8 89 5c 3e fb 0f b6 2d 3e 24 74 04 31 ff 89 [ 74.243160][ T6809] RSP: 0018:ffffc90001906f60 EFLAGS: 00010293 [ 74.249216][ T6809] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff863558b5 [ 74.257173][ T6809] RDX: ffff8880a65ec380 RSI: ffffffff86355acb RDI: 0000000000000005 [ 74.265217][ T6809] RBP: ffff8880a3c600b8 R08: 0000000000000000 R09: ffffffff8a7b30c7 [ 74.273193][ T6809] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888093d4fc00 [ 74.281153][ T6809] R13: 0000000000034960 R14: ffff8880a3c60000 R15: 0000000000000000 [ 74.289141][ T6809] ? rollback_registered_many+0x9c5/0xf60 [ 74.294866][ T6809] ? rollback_registered_many+0xbdb/0xf60 [ 74.300645][ T6809] ? dev_xdp_uninstall+0x3f0/0x3f0 [ 74.306732][ T6809] ? dev_set_mtu_ext+0x590/0x590 [ 74.311684][ T6809] unregister_netdevice_queue+0x2dd/0x570 [ 74.317406][ T6809] ? unregister_netdevice_many+0x50/0x50 [ 74.323719][ T6809] ? hsr_add_port+0x4f3/0x790 [ 74.328379][ T6809] hsr_dev_finalize+0x5ce/0x746 [ 74.333213][ T6809] hsr_newlink+0x27c/0x520 [ 74.337607][ T6809] ? hsr_dellink+0x70/0x70 [ 74.342017][ T6809] ? rtnl_create_link+0x184/0xad0 [ 74.347020][ T6809] ? hsr_dellink+0x70/0x70 [ 74.351416][ T6809] __rtnl_newlink+0x1090/0x1730 [ 74.356247][ T6809] ? rtnl_setlink+0x3c0/0x3c0 [ 74.360900][ T6809] ? lock_downgrade+0x820/0x820 [ 74.365742][ T6809] ? is_bpf_text_address+0xcb/0x160 [ 74.370918][ T6809] ? kernel_text_address+0xbd/0xf0 [ 74.376012][ T6809] ? __kernel_text_address+0x9/0x30 [ 74.384327][ T6809] ? unwind_get_return_address+0x51/0x90 [ 74.389945][ T6809] ? profile_setup.cold+0xc1/0xc1 [ 74.394951][ T6809] ? arch_stack_walk+0x97/0xf0 [ 74.399724][ T6809] ? stack_trace_save+0x8c/0xc0 [ 74.404671][ T6809] ? stack_trace_consume_entry+0x160/0x160 [ 74.410490][ T6809] ? mark_lock+0xbc/0x1710 [ 74.414900][ T6809] ? lock_is_held_type+0xb0/0xe0 [ 74.419833][ T6809] ? trace_kmalloc+0xfd/0x130 [ 74.424493][ T6809] ? kmem_cache_alloc_trace+0x168/0x2d0 [ 74.430061][ T6809] rtnl_newlink+0x64/0xa0 [ 74.434379][ T6809] ? __rtnl_newlink+0x1730/0x1730 [ 74.439385][ T6809] rtnetlink_rcv_msg+0x44e/0xad0 [ 74.444302][ T6809] ? rtnetlink_put_metrics+0x510/0x510 [ 74.449757][ T6809] ? lock_acquire+0x1f1/0xad0 [ 74.454407][ T6809] ? netlink_deliver_tap+0x146/0xb70 [ 74.459679][ T6809] netlink_rcv_skb+0x15a/0x430 [ 74.464419][ T6809] ? rtnetlink_put_metrics+0x510/0x510 [ 74.469851][ T6809] ? netlink_ack+0xa10/0xa10 [ 74.474421][ T6809] netlink_unicast+0x533/0x7d0 [ 74.479163][ T6809] ? netlink_attachskb+0x810/0x810 [ 74.484251][ T6809] ? _copy_from_iter_full+0x247/0x890 [ 74.489610][ T6809] netlink_sendmsg+0x856/0xd90 [ 74.494350][ T6809] ? netlink_unicast+0x7d0/0x7d0 [ 74.499274][ T6809] ? netlink_unicast+0x7d0/0x7d0 [ 74.504238][ T6809] sock_sendmsg+0xcf/0x120 [ 74.508672][ T6809] ____sys_sendmsg+0x6e8/0x810 [ 74.513443][ T6809] ? kernel_sendmsg+0x50/0x50 [ 74.518103][ T6809] ? do_recvmmsg+0x6d0/0x6d0 [ 74.522671][ T6809] ? __wake_up_common_lock+0xb4/0x130 [ 74.528024][ T6809] ? find_held_lock+0x2d/0x110 [ 74.532808][ T6809] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 74.538762][ T6809] ? __wake_up_common_lock+0xde/0x130 [ 74.544122][ T6809] ___sys_sendmsg+0xf3/0x170 [ 74.548707][ T6809] ? sendmsg_copy_msghdr+0x160/0x160 [ 74.553993][ T6809] ? lock_downgrade+0x820/0x820 [ 74.558844][ T6809] ? lock_downgrade+0x820/0x820 [ 74.563689][ T6809] ? __might_fault+0x190/0x1d0 [ 74.569244][ T6809] ? _copy_to_user+0x126/0x160 [ 74.574008][ T6809] ? move_addr_to_user+0xb5/0x200 [ 74.579022][ T6809] ? __fget_light+0x215/0x280 [ 74.583678][ T6809] __sys_sendmsg+0xe5/0x1b0 [ 74.588169][ T6809] ? __sys_sendmsg_sock+0xb0/0xb0 [ 74.593175][ T6809] ? do_syscall_64+0x1c/0xe0 [ 74.597745][ T6809] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 74.603716][ T6809] do_syscall_64+0x60/0xe0 [ 74.608134][ T6809] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.614000][ T6809] RIP: 0033:0x440e39 [ 74.617864][ T6809] Code: Bad RIP value. [ 74.621918][ T6809] RSP: 002b:00007ffd525076a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 74.630312][ T6809] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000440e39 [ 74.638258][ T6809] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 74.646204][ T6809] RBP: 00007ffd525076b0 R08: 0000000120080522 R09: 0000000120080522 [ 74.654151][ T6809] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000402340 [ 74.662102][ T6809] R13: 00000000004023d0 R14: 0000000000000000 R15: 0000000000000000 [ 74.671141][ T6809] Kernel Offset: disabled [ 74.675519][ T6809] Rebooting in 86400 seconds..