[ 20.990899] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 21.426546] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [ 21.651215] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.525926] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) [ 38.379850] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) Warning: Permanently added '10.128.15.200' (ECDSA) to the list of known hosts. [ 43.767798] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) executing program [ 43.867499] syzkaller583838 uses obsolete (PF_INET,SOCK_PACKET) [ 43.876000] ------------[ cut here ]------------ [ 43.880814] WARNING: CPU: 0 PID: 4045 at net/ipv6/ip6_fib.c:1315 fib6_repair_tree+0x558/0x790() [ 43.889735] Kernel panic - not syncing: panic_on_warn set ... [ 43.889735] [ 43.897079] CPU: 0 PID: 4045 Comm: syzkaller583838 Not tainted 4.4.114-gfe09418 #3 [ 43.904769] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.914112] 0000000000000000 030efc564ed58f49 ffff8800b98170d0 ffffffff81d02e6d [ 43.922096] ffffffff83843a40 ffff8800b98171a8 ffffffff83d10c80 0000000000000009 [ 43.930072] 0000000000000523 ffff8800b9817198 ffffffff8141a1da 0000000041b58ab3 [ 43.938038] Call Trace: [ 43.940603] [] dump_stack+0xc1/0x124 [ 43.945940] [] panic+0x1aa/0x388 [ 43.950942] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 43.957937] [] ? pm_qos_get_value.part.4+0xb/0xb [ 43.964333] [] ? fib6_walk+0xaf/0xd0 [ 43.969687] [] ? warn_slowpath_common+0x10a/0x140 [ 43.976168] [] warn_slowpath_common+0x125/0x140 [ 43.982463] [] ? fib6_repair_tree+0x558/0x790 [ 43.988578] [] warn_slowpath_null+0x29/0x30 [ 43.994526] [] fib6_repair_tree+0x558/0x790 [ 44.000472] [] fib6_del+0x85f/0xa00 [ 44.006570] [] fib6_clean_node+0x33a/0x4e0 [ 44.012429] [] ? fib6_del+0xa00/0xa00 [ 44.017862] [] ? mark_held_locks+0xaf/0x100 [ 44.023811] [] ? __local_bh_enable_ip+0x6a/0xd0 [ 44.030105] [] fib6_walk_continue+0x39b/0x620 [ 44.036245] [] fib6_walk+0x89/0xd0 [ 44.041410] [] fib6_clean_tree+0xe2/0x130 [ 44.047180] [] ? fib6_remove_prefsrc+0x240/0x240 [ 44.053561] [] ? fib6_walk+0xd0/0xd0 [ 44.058899] [] ? fib6_del+0xa00/0xa00 [ 44.064321] [] ? fib6_remove_prefsrc+0x240/0x240 [ 44.070718] [] ? get_parent_ip+0xd/0x50 [ 44.076315] [] __fib6_clean_all+0xfe/0x230 [ 44.082173] [] ? fib6_purge_rt+0x2c0/0x2c0 [ 44.088027] [] ? fib6_remove_prefsrc+0x240/0x240 [ 44.094406] [] ? fib6_remove_prefsrc+0x240/0x240 [ 44.100786] [] fib6_clean_all+0x27/0x30 [ 44.106384] [] rt6_ifdown+0xa1/0x850 [ 44.111722] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 44.118623] [] ? rt6_clean_tohost+0x30/0x30 [ 44.124569] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 44.131554] [] ? mark_held_locks+0xaf/0x100 [ 44.137499] [] ? check_preemption_disabled+0x3b/0x200 [ 44.144327] [] addrconf_ifdown+0x75/0xa00 [ 44.150111] [] addrconf_notify+0x76a/0x1b80 [ 44.156061] [] ? pktgen_device_event+0x147/0x6c0 [ 44.162455] [] ? inet6_ifinfo_notify+0x140/0x140 [ 44.168834] [] ? pktgen_device_event+0x464/0x6c0 [ 44.175211] [] ? ip_vs_dst_event+0x251/0x660 [ 44.181245] [] ? ip6mr_device_event+0x27/0x1d0 [ 44.187450] [] notifier_call_chain+0x95/0x1b0 [ 44.193567] [] raw_notifier_call_chain+0x2d/0x40 [ 44.199947] [] call_netdevice_notifiers_info+0x51/0x90 [ 44.206855] [] dev_set_mtu+0x216/0x3b0 [ 44.212369] [] ? netdev_features_change+0xa0/0xa0 [ 44.218848] [] ? full_name_hash+0x67/0x90 [ 44.224621] [] dev_ifsioc+0x450/0x800 [ 44.230045] [] ? register_gifconf+0x60/0x60 [ 44.236001] [] ? dev_load+0x84/0x1a0 [ 44.241340] [] dev_ioctl+0x1c3/0xce0 [ 44.246673] [] ? save_stack_trace+0x26/0x50 [ 44.252620] [] ? save_stack+0x43/0xd0 [ 44.258220] [] ? kasan_kmalloc+0xad/0xe0 [ 44.263918] [] ? kmem_cache_alloc+0xba/0x290 [ 44.269950] [] ? dev_load+0x1a0/0x1a0 [ 44.275374] [] ? handle_mm_fault+0x271a/0x3190 [ 44.281579] [] ? __do_page_fault+0x35b/0xa00 [ 44.287616] [] ? do_page_fault+0x27/0x30 [ 44.293316] [] ? __lock_acquire+0xb5f/0x4b50 [ 44.299350] [] sock_do_ioctl+0x94/0xb0 [ 44.304862] [] compat_sock_ioctl+0x875/0x12d0 [ 44.310984] [] ? selinux_file_ioctl+0x363/0x570 [ 44.317274] [] ? sock_ioctl+0x3d0/0x3d0 [ 44.322872] [] ? check_preemption_disabled+0x3b/0x200 [ 44.329687] [] compat_SyS_ioctl+0x28a/0x2540 [ 44.335719] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 44.342705] [] ? sock_ioctl+0x3d0/0x3d0 [ 44.348303] [] ? compat_SyS_ppoll+0x420/0x420 [ 44.354423] [] ? handle_mm_fault+0x3f2/0x3190 [ 44.360556] [] ? __alloc_fd+0x1e3/0x500 [ 44.366152] [] ? __do_page_fault+0x380/0xa00 [ 44.372185] [] ? do_fast_syscall_32+0xd7/0x890 [ 44.378411] [] ? compat_SyS_ppoll+0x420/0x420 [ 44.384529] [] do_fast_syscall_32+0x314/0x890 [ 44.390648] [] sysenter_flags_fixed+0xd/0x17 [ 44.397248] Dumping ftrace buffer: [ 44.400835] (ftrace buffer empty) [ 44.404520] Kernel Offset: disabled [ 44.408140] Rebooting in 86400 seconds..