[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 27.630667] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.042645] random: sshd: uninitialized urandom read (32 bytes read) [ 31.358019] random: sshd: uninitialized urandom read (32 bytes read) [ 32.380421] random: sshd: uninitialized urandom read (32 bytes read) [ 729.673954] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.24' (ECDSA) to the list of known hosts. [ 735.217675] random: sshd: uninitialized urandom read (32 bytes read) [ 735.352194] IPVS: ftp: loaded support on port[0] = 21 [ 735.521074] ip (4492) used greatest stack depth: 54312 bytes left [ 735.534937] bridge0: port 1(bridge_slave_0) entered blocking state [ 735.541612] bridge0: port 1(bridge_slave_0) entered disabled state [ 735.549399] device bridge_slave_0 entered promiscuous mode [ 735.572432] bridge0: port 2(bridge_slave_1) entered blocking state [ 735.578910] bridge0: port 2(bridge_slave_1) entered disabled state [ 735.586588] device bridge_slave_1 entered promiscuous mode [ 735.608633] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 735.631140] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 735.692249] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 735.724559] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 735.818654] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 735.826850] team0: Port device team_slave_0 added [ 735.849291] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 735.856861] team0: Port device team_slave_1 added [ 735.878839] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 735.902961] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 735.926786] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 735.952809] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 736.151522] bridge0: port 2(bridge_slave_1) entered blocking state [ 736.158080] bridge0: port 2(bridge_slave_1) entered forwarding state [ 736.164811] bridge0: port 1(bridge_slave_0) entered blocking state [ 736.171422] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 736.979669] 8021q: adding VLAN 0 to HW filter on device bond0 [ 737.055661] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 737.131622] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 737.137916] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 737.146553] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 737.211319] 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 [ 758.096090] ================================================================== [ 758.103596] BUG: KMSAN: uninit-value in rcu_segcblist_pend_cbs+0xa9/0xf0 [ 758.110453] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.17.0-rc5+ #102 [ 758.117109] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 758.126453] Call Trace: [ 758.129023] [ 758.131237] dump_stack+0x185/0x1d0 [ 758.134863] ? rcu_segcblist_pend_cbs+0xa9/0xf0 [ 758.139531] kmsan_report+0x149/0x260 [ 758.143413] __msan_warning_32+0x6e/0xc0 [ 758.147471] rcu_segcblist_pend_cbs+0xa9/0xf0 [ 758.152139] rcu_accelerate_cbs+0x7e/0xca0 [ 758.156453] ? _raw_spin_lock_irqsave+0x45/0xf0 [ 758.161123] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 758.166484] rcu_process_callbacks+0x873/0x2000 [ 758.171489] ? rcu_scheduler_starting+0xe0/0xe0 [ 758.176190] __do_softirq+0x56d/0x93d [ 758.179980] irq_exit+0x202/0x240 [ 758.183432] exiting_irq+0xe/0x10 [ 758.186872] smp_apic_timer_interrupt+0x64/0x90 [ 758.191524] apic_timer_interrupt+0xf/0x20 [ 758.195734] [ 758.197965] RIP: 0010:default_idle+0x1fb/0x3c0 [ 758.202544] RSP: 0018:ffff8801d8e5fdf0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 758.210299] RAX: ffff8801fd431f38 RBX: 0000000000000000 RCX: ffff880000000000 [ 758.217655] RDX: ffff8801fd031f38 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 758.224925] RBP: ffff8801d8e5fe28 R08: 0000000001080020 R09: 0000000000000002 [ 758.232223] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d8e5fe8f [ 758.239588] R13: ffff8801d8da57c0 R14: ffff8801d8e5fe8c R15: ffff8801d8da6098 [ 758.247145] ? __cpuidle_text_start+0x8/0x8 [ 758.251563] arch_cpu_idle+0x20/0x30 [ 758.255276] do_idle+0x36d/0x830 [ 758.258763] cpu_startup_entry+0x45/0x50 [ 758.262817] ? setup_APIC_timer+0x220/0x220 [ 758.267127] start_secondary+0x3a2/0x470 [ 758.271177] secondary_startup_64+0xa5/0xb0 [ 758.275487] [ 758.277093] Uninit was stored to memory at: [ 758.281478] kmsan_internal_chain_origin+0x12b/0x210 [ 758.286576] __msan_chain_origin+0x69/0xc0 [ 758.290809] rcu_segcblist_enqueue+0x275/0x2d0 [ 758.295386] __call_rcu+0x227/0xef0 [ 758.299009] call_rcu_sched+0x32/0x40 [ 758.302808] release_task+0x24b9/0x2530 [ 758.306769] do_exit+0x2d91/0x38d0 [ 758.310296] do_group_exit+0x1a0/0x360 [ 758.314171] get_signal+0xfcb/0x1f40 [ 758.317879] do_signal+0xb8/0x1cf0 [ 758.321408] prepare_exit_to_usermode+0x271/0x3a0 [ 758.326249] syscall_return_slowpath+0xe9/0x700 [ 758.330914] do_syscall_64+0x1af/0x230 [ 758.334805] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 758.339980] Uninit was created at: [ 758.343528] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 758.348619] kmsan_kmalloc+0x94/0x100 [ 758.352415] kmem_cache_alloc+0xad3/0xb90 [ 758.356563] alloc_pid+0x7f/0xce0 [ 758.360011] copy_process+0x3fbb/0x9bc0 [ 758.363978] _do_fork+0x311/0xf00 [ 758.367437] __x64_sys_clone+0x15e/0x1b0 [ 758.371479] do_syscall_64+0x152/0x230 [ 758.375354] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 758.380519] ================================================================== [ 758.387858] Disabling lock debugging due to kernel taint [ 758.393295] Kernel panic - not syncing: panic_on_warn set ... [ 758.393295] [ 758.400644] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 4.17.0-rc5+ #102 [ 758.408679] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 758.418105] Call Trace: [ 758.420671] [ 758.422823] dump_stack+0x185/0x1d0 [ 758.426437] panic+0x39d/0x940 [ 758.429635] ? rcu_segcblist_pend_cbs+0xa9/0xf0 [ 758.434300] kmsan_report+0x260/0x260 [ 758.438091] __msan_warning_32+0x6e/0xc0 [ 758.442138] rcu_segcblist_pend_cbs+0xa9/0xf0 [ 758.446617] rcu_accelerate_cbs+0x7e/0xca0 [ 758.450850] ? _raw_spin_lock_irqsave+0x45/0xf0 [ 758.455521] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 758.460908] rcu_process_callbacks+0x873/0x2000 [ 758.465572] ? rcu_scheduler_starting+0xe0/0xe0 [ 758.470227] __do_softirq+0x56d/0x93d [ 758.474024] irq_exit+0x202/0x240 [ 758.477468] exiting_irq+0xe/0x10 [ 758.480920] smp_apic_timer_interrupt+0x64/0x90 [ 758.485580] apic_timer_interrupt+0xf/0x20 [ 758.489795] [ 758.492030] RIP: 0010:default_idle+0x1fb/0x3c0 [ 758.496598] RSP: 0018:ffff8801d8e5fdf0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 758.504290] RAX: ffff8801fd431f38 RBX: 0000000000000000 RCX: ffff880000000000 [ 758.511543] RDX: ffff8801fd031f38 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 [ 758.518801] RBP: ffff8801d8e5fe28 R08: 0000000001080020 R09: 0000000000000002 [ 758.526059] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d8e5fe8f [ 758.533317] R13: ffff8801d8da57c0 R14: ffff8801d8e5fe8c R15: ffff8801d8da6098 [ 758.540599] ? __cpuidle_text_start+0x8/0x8 [ 758.544922] arch_cpu_idle+0x20/0x30 [ 758.548622] do_idle+0x36d/0x830 [ 758.551978] cpu_startup_entry+0x45/0x50 [ 758.556038] ? setup_APIC_timer+0x220/0x220 [ 758.560352] start_secondary+0x3a2/0x470 [ 758.564400] secondary_startup_64+0xa5/0xb0 [ 758.569312] Dumping ftrace buffer: [ 758.572854] (ftrace buffer empty) [ 758.576553] Kernel Offset: disabled [ 758.580206] Rebooting in 86400 seconds..