[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.450168] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.333598] random: sshd: uninitialized urandom read (32 bytes read) [ 23.741571] random: sshd: uninitialized urandom read (32 bytes read) [ 24.493136] random: sshd: uninitialized urandom read (32 bytes read) [ 172.723337] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. [ 178.239908] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 182.439404] kasan: CONFIG_KASAN_INLINE enabled [ 182.444151] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 182.451589] general protection fault: 0000 [#1] SMP KASAN [ 182.457113] Dumping ftrace buffer: [ 182.460634] (ftrace buffer empty) [ 182.464335] Modules linked in: [ 182.467513] CPU: 1 PID: 4513 Comm: syz-executor485 Not tainted 4.17.0-rc5+ #60 [ 182.474850] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 182.484195] RIP: 0010:__radix_tree_delete+0x74/0x230 [ 182.489274] RSP: 0018:ffff8801acc37108 EFLAGS: 00010206 [ 182.494619] RAX: 0000000000000003 RBX: dffffc0000000000 RCX: 1ffff10035986e3e [ 182.501868] RDX: 0000000000000000 RSI: ffffffff876910ed RDI: ffff8801a09e9e68 [ 182.509114] RBP: ffff8801acc371a8 R08: ffff8801d9704680 R09: ffffed003413d3b1 [ 182.516362] R10: ffff8801acc372b8 R11: ffff8801a09e9d8f R12: 0000000000000000 [ 182.523609] R13: ffff8801a09e9e68 R14: 0000000000000018 R15: ffff8801acc37230 [ 182.530858] FS: 00007fa560789700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 executing program [ 182.539060] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 182.544921] CR2: 00007f3efc560000 CR3: 00000001d9552000 CR4: 00000000001426e0 [ 182.552172] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 182.559421] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 182.566676] Call Trace: [ 182.569242] ? find_held_lock+0x36/0x1c0 [ 182.573760] ? radix_tree_tag_clear+0x490/0x490 [ 182.578410] ? retint_kernel+0x10/0x10 [ 182.582281] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 executing program [ 182.587808] radix_tree_delete_item+0x148/0x2d0 [ 182.592456] ? radix_tree_lookup+0x30/0x30 [ 182.596667] ? retint_kernel+0x10/0x10 [ 182.600537] idr_remove+0x46/0x60 [ 182.603970] kvm_vm_ioctl_hv_eventfd+0x1df/0x24b [ 182.608713] kvm_arch_vm_ioctl+0x155e/0x2690 [ 182.613104] ? find_held_lock+0x36/0x1c0 [ 182.617144] ? kvm_vm_ioctl_irq_line+0x160/0x160 [ 182.621883] ? graph_lock+0x170/0x170 [ 182.625665] ? check_same_owner+0x320/0x320 [ 182.629969] ? rcu_note_context_switch+0x710/0x710 [ 182.634882] ? lock_acquire+0x1dc/0x520 [ 182.638834] ? __might_sleep+0x95/0x190 [ 182.642789] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 182.648304] ? futex_wait_queue_me+0x550/0x820 [ 182.652866] ? refill_pi_state_cache.part.7+0x300/0x300 [ 182.658210] ? kasan_check_write+0x14/0x20 [ 182.662427] ? do_raw_spin_lock+0xc1/0x200 [ 182.666648] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 182.672162] ? print_usage_bug+0xc0/0xc0 [ 182.676200] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 182.681194] ? futex_wait_setup+0x279/0x400 [ 182.685497] ? futex_wake+0x750/0x750 [ 182.689282] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 182.694453] ? __lock_acquire+0x7f5/0x5140 [ 182.698669] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 182.703841] kvm_vm_ioctl+0x246/0x1d90 [ 182.707705] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 182.712786] ? futex_wake+0x2f6/0x750 [ 182.716566] ? kvm_set_memory_region+0x50/0x50 [ 182.721127] ? get_futex_key+0x1e90/0x1e90 [ 182.725339] ? kvm_coalesced_mmio_init+0x15c/0x1c0 [ 182.730251] ? __alloc_fd+0x700/0x700 [ 182.734033] ? lock_downgrade+0x8e0/0x8e0 [ 182.738159] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 182.743330] ? do_futex+0x249/0x27d0 [ 182.747023] ? kvm_debugfs_release+0x90/0x90 [ 182.751415] ? graph_lock+0x170/0x170 [ 182.755209] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 182.760382] ? __kernel_text_address+0xd/0x40 [ 182.764871] ? exit_robust_list+0x290/0x290 [ 182.769170] ? find_held_lock+0x36/0x1c0 [ 182.773214] ? lock_downgrade+0x8e0/0x8e0 [ 182.777346] ? kasan_check_read+0x11/0x20 [ 182.781474] ? rcu_is_watching+0x85/0x140 [ 182.785603] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 182.790779] ? __fget+0x40c/0x650 [ 182.794213] ? expand_files.part.8+0x9a0/0x9a0 [ 182.798774] ? trace_hardirqs_off+0xd/0x10 [ 182.802991] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 182.808075] ? kvm_set_memory_region+0x50/0x50 [ 182.812641] do_vfs_ioctl+0x1cf/0x16a0 [ 182.816510] ? rcu_pm_notify+0xc0/0xc0 [ 182.820378] ? trace_hardirqs_off+0xd/0x10 [ 182.824611] ? ioctl_preallocate+0x2e0/0x2e0 [ 182.829002] ? fget_raw+0x20/0x20 [ 182.832442] ? kmem_cache_free+0x25c/0x2d0 [ 182.836671] ? __x64_sys_futex+0x477/0x680 [ 182.840890] ? do_futex+0x27d0/0x27d0 [ 182.844672] ? security_file_ioctl+0x94/0xc0 [ 182.849069] ksys_ioctl+0xa9/0xd0 [ 182.852503] __x64_sys_ioctl+0x73/0xb0 [ 182.856555] do_syscall_64+0x1b1/0x800 [ 182.860423] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 182.865254] ? syscall_return_slowpath+0x5c0/0x5c0 [ 182.870177] ? syscall_return_slowpath+0x30f/0x5c0 [ 182.875090] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 182.880434] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 182.885258] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 182.890428] RIP: 0033:0x4455f9 [ 182.893597] RSP: 002b:00007fa560788da8 EFLAGS: 00000297 ORIG_RAX: 0000000000000010 [ 182.901284] RAX: ffffffffffffffda RBX: 00000000006dac44 RCX: 00000000004455f9 [ 182.908535] RDX: 0000000020000140 RSI: 000000004018aebd RDI: 00000000000003fe [ 182.915785] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 182.923047] R10: 0000000000000000 R11: 0000000000000297 R12: 00000000006dac40 [ 182.930308] R13: 6d766b2f7665642f R14: 00007fa5607899c0 R15: 0000000000000005 [ 182.937563] Code: 46 9a 88 48 c7 45 88 80 10 69 87 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 03 1e 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 [ 182.956699] RIP: __radix_tree_delete+0x74/0x230 RSP: ffff8801acc37108 [ 182.963349] ---[ end trace 1f8127b7a2db6624 ]--- [ 182.968103] Kernel panic - not syncing: Fatal exception [ 182.973854] Dumping ftrace buffer: [ 182.977374] (ftrace buffer empty) [ 182.981072] Kernel Offset: disabled [ 182.984676] Rebooting in 86400 seconds..