[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.407329] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.803966] random: sshd: uninitialized urandom read (32 bytes read) [ 25.315762] random: sshd: uninitialized urandom read (32 bytes read) [ 26.055407] random: sshd: uninitialized urandom read (32 bytes read) [ 38.204756] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.43' (ECDSA) to the list of known hosts. [ 43.688417] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/29 03:22:50 parsed 1 programs 2018/04/29 03:22:50 executed programs: 0 [ 44.247430] IPVS: ftp: loaded support on port[0] = 21 [ 44.267717] IPVS: ftp: loaded support on port[0] = 21 [ 44.271632] IPVS: ftp: loaded support on port[0] = 21 [ 44.276143] IPVS: ftp: loaded support on port[0] = 21 [ 44.290389] IPVS: ftp: loaded support on port[0] = 21 [ 44.290908] IPVS: ftp: loaded support on port[0] = 21 [ 44.308165] IPVS: ftp: loaded support on port[0] = 21 [ 44.313185] IPVS: ftp: loaded support on port[0] = 21 2018/04/29 03:22:55 executed programs: 267 2018/04/29 03:23:00 executed programs: 514 [ 56.100069] kasan: CONFIG_KASAN_INLINE enabled [ 56.105074] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 56.112509] general protection fault: 0000 [#1] SMP KASAN [ 56.118047] Dumping ftrace buffer: [ 56.121583] (ftrace buffer empty) [ 56.125298] Modules linked in: [ 56.128500] CPU: 1 PID: 7408 Comm: syz-executor0 Not tainted 4.17.0-rc2+ #22 [ 56.135682] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.145062] RIP: 0010:__radix_tree_delete+0x74/0x230 [ 56.150255] RSP: 0018:ffff8801d90d7108 EFLAGS: 00010246 [ 56.155629] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 1ffff1003b21ae3e [ 56.162914] RDX: 0000000000000000 RSI: ffffffff8768eeed RDI: ffff8801a5631d68 [ 56.170191] RBP: ffff8801d90d71a8 R08: ffff8801ca108140 R09: ffffed0034ac6391 [ 56.177470] R10: ffff8801d90d72b8 R11: ffff8801a5631c8f R12: 0000000000000000 [ 56.184780] R13: ffff8801a5631d68 R14: 0000000000000000 R15: ffff8801d90d7230 [ 56.192062] FS: 00007f25bc17d700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 56.200295] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.206183] CR2: 0000000000728020 CR3: 00000001d9533000 CR4: 00000000001426e0 [ 56.213464] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.220745] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.228018] Call Trace: [ 56.230620] ? find_held_lock+0x36/0x1c0 [ 56.234708] ? radix_tree_tag_clear+0x490/0x490 [ 56.239411] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.244968] radix_tree_delete_item+0x148/0x2d0 [ 56.249913] ? radix_tree_lookup+0x30/0x30 [ 56.254681] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 56.259448] ? retint_kernel+0x10/0x10 [ 56.263353] idr_remove+0x46/0x60 [ 56.266819] kvm_vm_ioctl_hv_eventfd+0x1df/0x24b [ 56.271850] kvm_arch_vm_ioctl+0x155e/0x2690 [ 56.276268] ? find_held_lock+0x36/0x1c0 [ 56.280353] ? kvm_vm_ioctl_irq_line+0x160/0x160 [ 56.285126] ? check_same_owner+0x320/0x320 [ 56.289463] ? rcu_note_context_switch+0x710/0x710 [ 56.294398] ? lock_acquire+0x1dc/0x520 [ 56.298382] ? __might_sleep+0x95/0x190 [ 56.302400] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.307947] ? futex_wait_queue_me+0x550/0x820 [ 56.312539] ? refill_pi_state_cache.part.7+0x300/0x300 [ 56.317914] ? kasan_check_write+0x14/0x20 [ 56.322163] ? do_raw_spin_lock+0xc1/0x200 [ 56.326426] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.332000] ? print_usage_bug+0xc0/0xc0 [ 56.336078] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 56.341108] ? futex_wait_setup+0x279/0x400 [ 56.345539] ? futex_wake+0x750/0x750 [ 56.349356] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 56.354581] ? __lock_acquire+0x7f5/0x5140 [ 56.358831] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 56.364034] kvm_vm_ioctl+0x246/0x1d90 [ 56.367933] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 56.373051] ? futex_wake+0x2f6/0x750 [ 56.376893] ? kvm_set_memory_region+0x50/0x50 [ 56.381930] ? get_futex_key+0x1e90/0x1e90 [ 56.386189] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 56.391395] ? do_futex+0x249/0x27d0 [ 56.395119] ? graph_lock+0x170/0x170 [ 56.398926] ? exit_robust_list+0x290/0x290 [ 56.403254] ? find_held_lock+0x36/0x1c0 [ 56.407331] ? lock_downgrade+0x8e0/0x8e0 [ 56.411490] ? kasan_check_read+0x11/0x20 [ 56.415995] ? rcu_is_watching+0x85/0x140 [ 56.420245] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 56.425458] ? __fget+0x40c/0x650 [ 56.428937] ? expand_files.part.8+0x9a0/0x9a0 [ 56.433529] ? graph_lock+0x170/0x170 [ 56.437333] ? graph_lock+0x170/0x170 [ 56.441143] ? kvm_set_memory_region+0x50/0x50 [ 56.445736] do_vfs_ioctl+0x1cf/0x16a0 [ 56.449735] ? ioctl_preallocate+0x2e0/0x2e0 [ 56.454153] ? fget_raw+0x20/0x20 [ 56.457620] ? __x64_sys_futex+0x477/0x680 [ 56.461873] ? do_futex+0x27d0/0x27d0 [ 56.465688] ? security_file_ioctl+0x94/0xc0 [ 56.470107] ksys_ioctl+0xa9/0xd0 [ 56.473572] __x64_sys_ioctl+0x73/0xb0 [ 56.477474] do_syscall_64+0x1b1/0x800 [ 56.481372] ? finish_task_switch+0x1ca/0x810 [ 56.485878] ? syscall_return_slowpath+0x5c0/0x5c0 [ 56.490822] ? syscall_return_slowpath+0x30f/0x5c0 [ 56.495789] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 56.501170] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 56.506027] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.511226] RIP: 0033:0x455979 [ 56.514419] RSP: 002b:00007f25bc17cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 56.522138] RAX: ffffffffffffffda RBX: 00007f25bc17d6d4 RCX: 0000000000455979 [ 56.529419] RDX: 0000000020000140 RSI: 000000004018aebd RDI: 0000000000000004 [ 56.536697] RBP: 000000000072c000 R08: 0000000000000000 R09: 0000000000000000 [ 56.543976] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 56.551340] R13: 0000000000000250 R14: 00000000006f6820 R15: 0000000000000002 [ 56.558620] Code: 3f 9a 88 48 c7 45 88 80 ee 68 87 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 a3 51 10 fa 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 0f 85 97 01 00 00 48 8d 55 d8 4c 8d 7a c0 49 8b 1e [ 56.578031] RIP: __radix_tree_delete+0x74/0x230 RSP: ffff8801d90d7108 [ 56.584686] ---[ end trace 2dbc78467743fde7 ]--- [ 56.589472] Kernel panic - not syncing: Fatal exception [ 56.595314] Dumping ftrace buffer: [ 56.598847] (ftrace buffer empty) [ 56.602640] Kernel Offset: disabled [ 56.607651] Rebooting in 86400 seconds..