[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.512962] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 19.675766] random: sshd: uninitialized urandom read (32 bytes read) [ 19.926426] random: sshd: uninitialized urandom read (32 bytes read) [ 20.635232] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 95.994817] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. [ 101.540965] random: sshd: uninitialized urandom read (32 bytes read) 2018/04/29 08:24:50 parsed 1 programs 2018/04/29 08:24:50 executed programs: 0 [ 101.990861] IPVS: ftp: loaded support on port[0] = 21 2018/04/29 08:24:56 executed programs: 320 2018/04/29 08:25:01 executed programs: 621 2018/04/29 08:25:06 executed programs: 924 2018/04/29 08:25:11 executed programs: 1224 2018/04/29 08:25:16 executed programs: 1510 2018/04/29 08:25:21 executed programs: 1809 2018/04/29 08:25:26 executed programs: 2098 2018/04/29 08:25:31 executed programs: 2381 2018/04/29 08:25:36 executed programs: 2679 2018/04/29 08:25:41 executed programs: 2964 2018/04/29 08:25:46 executed programs: 3255 2018/04/29 08:25:51 executed programs: 3552 2018/04/29 08:25:56 executed programs: 3848 [ 168.272112] kasan: CONFIG_KASAN_INLINE enabled [ 168.277005] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 168.284585] general protection fault: 0000 [#1] SMP KASAN [ 168.290129] Dumping ftrace buffer: [ 168.293646] (ftrace buffer empty) [ 168.297343] Modules linked in: [ 168.300528] CPU: 1 PID: 11377 Comm: syz-executor0 Not tainted 4.17.0-rc2+ #48 [ 168.307776] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 168.317128] RIP: 0010:__radix_tree_delete+0x74/0x230 [ 168.322209] RSP: 0018:ffff8801b1367168 EFLAGS: 00010206 [ 168.327559] RAX: 0000000000000003 RBX: dffffc0000000000 RCX: 1ffff1003626ce4a [ 168.334814] RDX: 0000000000000000 RSI: ffffffff8768eeed RDI: ffff8801a5c96328 [ 168.342080] RBP: ffff8801b1367208 R08: ffff8801ac1f6080 R09: ffffed0034b92c49 [ 168.349340] R10: ffff8801b1367318 R11: ffff8801a5c9624f R12: 0000000000000000 [ 168.356597] R13: ffff8801a5c96328 R14: 0000000000000018 R15: ffff8801b1367290 [ 168.363851] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:0000000009dda900 [ 168.372066] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 168.377931] CR2: 0000000020000100 CR3: 00000001b6580000 CR4: 00000000001426e0 [ 168.385193] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.392460] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.399971] Call Trace: [ 168.402542] ? find_held_lock+0x36/0x1c0 [ 168.406586] ? radix_tree_tag_clear+0x490/0x490 [ 168.411236] ? retint_kernel+0x10/0x10 [ 168.415111] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 168.420632] radix_tree_delete_item+0x148/0x2d0 [ 168.425289] ? radix_tree_lookup+0x30/0x30 [ 168.429508] ? retint_kernel+0x10/0x10 [ 168.433378] ? _copy_from_user+0x100/0x150 [ 168.437601] idr_remove+0x46/0x60 [ 168.441040] kvm_vm_ioctl_hv_eventfd+0x1df/0x24b [ 168.445789] kvm_arch_vm_ioctl+0x155e/0x2690 [ 168.450179] ? kvm_vm_ioctl_irq_line+0x160/0x160 [ 168.454954] ? __pagevec_lru_add+0x30/0x30 [ 168.459170] ? mem_cgroup_usage+0x420/0x420 [ 168.463472] ? save_stack+0xa9/0xd0 [ 168.467078] ? save_stack+0x43/0xd0 [ 168.470684] ? kasan_kmalloc+0xc4/0xe0 [ 168.474568] ? kasan_slab_alloc+0x12/0x20 [ 168.478701] ? print_usage_bug+0xc0/0xc0 [ 168.482757] ? lru_cache_add+0x22c/0x450 [ 168.486798] ? graph_lock+0x170/0x170 [ 168.490580] ? __mem_cgroup_threshold+0x720/0x720 [ 168.495411] ? mark_held_locks+0xc9/0x160 [ 168.499540] ? page_add_new_anon_rmap+0x3ff/0x850 [ 168.504363] ? find_held_lock+0x36/0x1c0 [ 168.508406] ? lock_downgrade+0x8e0/0x8e0 [ 168.512537] ? pudp_huge_clear_flush+0x230/0x230 [ 168.517291] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 168.522482] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 168.528025] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 168.533130] ? futex_wake+0x2f6/0x750 [ 168.536929] ? kasan_check_write+0x14/0x20 [ 168.541151] kvm_vm_ioctl+0x246/0x1d90 [ 168.545030] ? kvm_set_memory_region+0x50/0x50 [ 168.549601] ? __thp_get_unmapped_area+0x180/0x180 [ 168.554522] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 168.559703] ? do_futex+0x249/0x27d0 [ 168.563395] ? debug_mutex_init+0x1c/0x60 [ 168.567534] ? exit_robust_list+0x290/0x290 [ 168.571833] ? lockdep_init_map+0x9/0x10 [ 168.575880] ? debug_mutex_init+0x2d/0x60 [ 168.580014] ? __mutex_init+0x1ef/0x280 [ 168.583985] ? pud_val+0x80/0xf0 [ 168.587346] ? pmd_val+0xf0/0xf0 [ 168.590692] ? find_held_lock+0x36/0x1c0 [ 168.594742] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 168.600269] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 168.605784] ? __handle_mm_fault+0x93a/0x4310 [ 168.610262] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 168.614997] ? graph_lock+0x170/0x170 [ 168.618785] ? kasan_check_read+0x11/0x20 [ 168.622912] ? graph_lock+0x170/0x170 [ 168.626690] ? find_held_lock+0x36/0x1c0 [ 168.630732] ? find_held_lock+0x36/0x1c0 [ 168.634774] ? lock_downgrade+0x8e0/0x8e0 [ 168.638911] ? handle_mm_fault+0x8c0/0xc70 [ 168.643127] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 168.648645] ? __fget_light+0x2ef/0x430 [ 168.652599] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 168.658116] kvm_vm_compat_ioctl+0x13b/0x420 [ 168.662506] ? kvm_vm_ioctl+0x1d90/0x1d90 [ 168.666632] ? __ia32_compat_sys_futex+0x3de/0x5e0 [ 168.671544] ? __x32_compat_sys_get_robust_list+0x430/0x430 [ 168.677235] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 168.682405] ? kvm_vm_ioctl+0x1d90/0x1d90 [ 168.686534] __ia32_compat_sys_ioctl+0x221/0x640 [ 168.691282] do_fast_syscall_32+0x345/0xf9b [ 168.695601] ? do_int80_syscall_32+0x880/0x880 [ 168.700178] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 168.704928] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 168.710459] ? syscall_return_slowpath+0x30f/0x5c0 [ 168.715385] ? sysret32_from_system_call+0x5/0x46 [ 168.720235] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 168.725068] entry_SYSENTER_compat+0x70/0x7f [ 168.729467] RIP: 0023:0xf7f25cb9 [ 168.732811] RSP: 002b:00000000ff8ebc0c EFLAGS: 00000282 ORIG_RAX: 0000000000000036 [ 168.740507] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000004018aebd [ 168.747761] RDX: 0000000020000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 168.755018] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 168.762284] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 168.769533] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 168.776782] 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 [ 168.795921] RIP: __radix_tree_delete+0x74/0x230 RSP: ffff8801b1367168 [ 168.802571] ---[ end trace b64635d72a0399fe ]--- [ 168.807352] Kernel panic - not syncing: Fatal exception [ 168.813171] Dumping ftrace buffer: [ 168.816692] (ftrace buffer empty) [ 168.820384] Kernel Offset: disabled [ 168.823993] Rebooting in 86400 seconds..