[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 57.279862] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 60.479780] random: sshd: uninitialized urandom read (32 bytes read) [ 60.972478] random: sshd: uninitialized urandom read (32 bytes read) [ 62.299337] random: sshd: uninitialized urandom read (32 bytes read) [ 62.733314] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.19' (ECDSA) to the list of known hosts. [ 68.607509] random: sshd: uninitialized urandom read (32 bytes read) [ 68.841169] IPVS: ftp: loaded support on port[0] = 21 [ 69.221000] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.227559] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.235908] device bridge_slave_0 entered promiscuous mode [ 69.278125] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.284596] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.292967] device bridge_slave_1 entered promiscuous mode [ 69.334111] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 69.374787] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 69.497202] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 69.541756] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 69.736457] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 69.744351] team0: Port device team_slave_0 added [ 69.783898] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 69.791726] team0: Port device team_slave_1 added [ 69.832751] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 69.877699] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 69.921152] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 69.959940] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported [ 70.368826] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.375277] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.382282] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.388723] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.397766] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 71.060378] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 71.927286] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.072978] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 72.214581] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 72.220838] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 72.230782] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.369354] 8021q: adding VLAN 0 to HW filter on device team0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 105.591081] ================================================================== [ 105.598489] BUG: KMSAN: uninit-value in memcmp+0x11d/0x180 [ 105.604121] CPU: 1 PID: 6391 Comm: syz-executor546 Not tainted 4.19.0-rc4+ #61 [ 105.611470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.620817] Call Trace: [ 105.623405] dump_stack+0x2f6/0x430 [ 105.627064] kmsan_report+0x183/0x2b0 [ 105.630897] __msan_warning+0x70/0xc0 [ 105.634714] memcmp+0x11d/0x180 [ 105.638028] __dev_mc_del+0x169/0x6c0 [ 105.641858] dev_mc_del+0x6d/0x80 [ 105.645314] igmp6_group_dropped+0x2c5/0x12e0 [ 105.649825] ? __local_bh_enable_ip+0x37/0x150 [ 105.654431] ? _raw_write_unlock_bh+0x4b/0x57 [ 105.658946] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 105.664315] __ipv6_dev_mc_dec+0x6f1/0xbb0 [ 105.668574] __ipv6_ifa_notify+0x9c4/0x17c0 [ 105.672909] ? kmsan_set_origin_inline+0x6b/0x120 [ 105.677750] ? __msan_poison_alloca+0x17c/0x200 [ 105.682426] ? __local_bh_enable_ip+0x37/0x150 [ 105.687033] addrconf_ifdown+0x1813/0x2670 [ 105.691307] addrconf_notify+0x2c2/0x5d50 [ 105.695468] ? kmsan_set_origin_inline+0x6b/0x120 [ 105.700308] ? __msan_poison_alloca+0x17c/0x200 [ 105.704980] ? tls_dev_event+0xe8/0x17b0 [ 105.709063] ? raw_notifier_call_chain+0x13e/0x240 [ 105.714007] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 105.719401] ? tls_dev_event+0xd74/0x17b0 [ 105.723565] ? nf_ct_iterate_cleanup_net+0x24c/0x2c0 [ 105.728673] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 105.734048] ? ip6mr_device_event+0x35f/0x3d0 [ 105.738567] ? dev_forward_change+0xb70/0xb70 [ 105.743074] raw_notifier_call_chain+0x13e/0x240 [ 105.747876] dev_close_many+0x627/0x9e0 [ 105.751856] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 105.757242] rollback_registered_many+0x9eb/0x2040 [ 105.762199] ? __list_add_valid+0xb8/0x450 [ 105.766439] unregister_netdevice_queue+0x547/0xa40 [ 105.771478] __tun_detach+0x220c/0x2c70 [ 105.775487] tun_chr_close+0xda/0x1c0 [ 105.779292] ? tun_chr_open+0x750/0x750 [ 105.783263] __fput+0x4ee/0xe50 [ 105.786560] ____fput+0x37/0x40 [ 105.789850] ? fput+0x3c0/0x3c0 [ 105.793127] task_work_run+0x457/0x4d0 [ 105.797038] prepare_exit_to_usermode+0x33e/0x410 [ 105.801907] syscall_return_slowpath+0xf3/0x790 [ 105.806586] ? __close_fd+0x465/0x4c0 [ 105.810405] ? __se_sys_close+0x72/0x140 [ 105.814473] do_syscall_64+0xde/0x100 [ 105.818278] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 105.823459] RIP: 0033:0x401450 [ 105.826643] Code: 01 f0 ff ff 0f 83 b0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d dd 23 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 84 0a 00 00 c3 48 83 ec 08 e8 3a 01 00 00 [ 105.845555] RSP: 002b:00007ffd5d9bb3b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 105.853279] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000401450 [ 105.860539] RDX: 00000000200000c0 RSI: 0000000000008914 RDI: 0000000000000005 [ 105.867798] RBP: 0000000000019c63 R08: 0000000000000000 R09: 0000000000000000 [ 105.875068] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 105.882347] R13: 00000000004023f0 R14: 0000000000000000 R15: 0000000000000000 [ 105.889621] [ 105.891238] Local variable description: ----buf@igmp6_group_dropped [ 105.897633] Variable was created at: [ 105.901339] igmp6_group_dropped+0x49/0x12e0 [ 105.905756] __ipv6_dev_mc_dec+0x6f1/0xbb0 [ 105.909990] ================================================================== [ 105.917344] Disabling lock debugging due to kernel taint [ 105.922783] Kernel panic - not syncing: panic_on_warn set ... [ 105.922783] [ 105.930142] CPU: 1 PID: 6391 Comm: syz-executor546 Tainted: G B 4.19.0-rc4+ #61 [ 105.938878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.948223] Call Trace: [ 105.950808] dump_stack+0x2f6/0x430 [ 105.954441] panic+0x54c/0xaf7 [ 105.957658] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 105.963137] kmsan_report+0x2a8/0x2b0 [ 105.966962] __msan_warning+0x70/0xc0 [ 105.970777] memcmp+0x11d/0x180 [ 105.974081] __dev_mc_del+0x169/0x6c0 [ 105.977907] dev_mc_del+0x6d/0x80 [ 105.981363] igmp6_group_dropped+0x2c5/0x12e0 [ 105.985878] ? __local_bh_enable_ip+0x37/0x150 [ 105.990472] ? _raw_write_unlock_bh+0x4b/0x57 [ 105.994991] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 106.000373] __ipv6_dev_mc_dec+0x6f1/0xbb0 [ 106.004638] __ipv6_ifa_notify+0x9c4/0x17c0 [ 106.008975] ? kmsan_set_origin_inline+0x6b/0x120 [ 106.013817] ? __msan_poison_alloca+0x17c/0x200 [ 106.018487] ? __local_bh_enable_ip+0x37/0x150 [ 106.023103] addrconf_ifdown+0x1813/0x2670 [ 106.027363] addrconf_notify+0x2c2/0x5d50 [ 106.031515] ? kmsan_set_origin_inline+0x6b/0x120 [ 106.036376] ? __msan_poison_alloca+0x17c/0x200 [ 106.041086] ? tls_dev_event+0xe8/0x17b0 [ 106.045159] ? raw_notifier_call_chain+0x13e/0x240 [ 106.050098] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 106.055461] ? tls_dev_event+0xd74/0x17b0 [ 106.059608] ? nf_ct_iterate_cleanup_net+0x24c/0x2c0 [ 106.064726] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 106.070099] ? ip6mr_device_event+0x35f/0x3d0 [ 106.074600] ? dev_forward_change+0xb70/0xb70 [ 106.079105] raw_notifier_call_chain+0x13e/0x240 [ 106.083871] dev_close_many+0x627/0x9e0 [ 106.087846] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 106.093217] rollback_registered_many+0x9eb/0x2040 [ 106.098156] ? __list_add_valid+0xb8/0x450 [ 106.102410] unregister_netdevice_queue+0x547/0xa40 [ 106.107451] __tun_detach+0x220c/0x2c70 [ 106.111448] tun_chr_close+0xda/0x1c0 [ 106.115257] ? tun_chr_open+0x750/0x750 [ 106.119245] __fput+0x4ee/0xe50 [ 106.122546] ____fput+0x37/0x40 [ 106.125822] ? fput+0x3c0/0x3c0 [ 106.129119] task_work_run+0x457/0x4d0 [ 106.133041] prepare_exit_to_usermode+0x33e/0x410 [ 106.137901] syscall_return_slowpath+0xf3/0x790 [ 106.142567] ? __close_fd+0x465/0x4c0 [ 106.146378] ? __se_sys_close+0x72/0x140 [ 106.150439] do_syscall_64+0xde/0x100 [ 106.154256] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 106.159456] RIP: 0033:0x401450 [ 106.162645] Code: 01 f0 ff ff 0f 83 b0 0a 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d dd 23 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 84 0a 00 00 c3 48 83 ec 08 e8 3a 01 00 00 [ 106.181540] RSP: 002b:00007ffd5d9bb3b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 106.189242] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000401450 [ 106.196516] RDX: 00000000200000c0 RSI: 0000000000008914 RDI: 0000000000000005 [ 106.203796] RBP: 0000000000019c63 R08: 0000000000000000 R09: 0000000000000000 [ 106.211080] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 106.218350] R13: 00000000004023f0 R14: 0000000000000000 R15: 0000000000000000 [ 106.225979] Kernel Offset: disabled [ 106.229622] Rebooting in 86400 seconds..