[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.243257] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.635697] random: sshd: uninitialized urandom read (32 bytes read) [ 24.968635] random: sshd: uninitialized urandom read (32 bytes read) [ 25.740783] random: sshd: uninitialized urandom read (32 bytes read) [ 49.162789] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. [ 54.619057] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.415424] kasan: CONFIG_KASAN_INLINE enabled [ 60.420340] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 60.427809] general protection fault: 0000 [#1] SMP KASAN [ 60.433348] Dumping ftrace buffer: [ 60.436895] (ftrace buffer empty) [ 60.440615] Modules linked in: [ 60.443830] CPU: 0 PID: 6926 Comm: syz-executor298 Not tainted 4.17.0-rc5+ #60 [ 60.451194] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.460568] RIP: 0010:__radix_tree_delete+0x74/0x230 executing program [ 60.465675] RSP: 0018:ffff8801cf5e7108 EFLAGS: 00010206 [ 60.471087] RAX: 000000000400002b RBX: dffffc0000000000 RCX: 1ffff10039ebce3e [ 60.478363] RDX: 0000000000000000 RSI: ffffffff876910ed RDI: ffff8801a1ef8928 [ 60.485656] RBP: ffff8801cf5e71a8 R08: ffff8801cb950100 R09: ffffed00343df109 [ 60.492938] R10: ffff8801cf5e72b8 R11: ffff8801a1ef884f R12: 0000000000000000 [ 60.500216] R13: ffff8801a1ef8928 R14: 0000000020000158 R15: ffff8801cf5e7230 [ 60.507498] FS: 00007f87bc9b9700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 executing program executing program [ 60.515989] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.521879] CR2: 00007f87bc997e78 CR3: 00000001d8fc3000 CR4: 00000000001426f0 [ 60.529157] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.536445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.543730] Call Trace: [ 60.546333] ? find_held_lock+0x36/0x1c0 [ 60.550408] ? radix_tree_tag_clear+0x490/0x490 [ 60.555093] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.560647] radix_tree_delete_item+0x148/0x2d0 executing program executing program [ 60.565338] ? radix_tree_lookup+0x30/0x30 [ 60.569587] ? retint_kernel+0x10/0x10 [ 60.573690] idr_remove+0x46/0x60 [ 60.577162] kvm_vm_ioctl_hv_eventfd+0x1df/0x24b [ 60.581946] kvm_arch_vm_ioctl+0x155e/0x2690 [ 60.586735] ? find_held_lock+0x36/0x1c0 [ 60.590811] ? kvm_vm_ioctl_irq_line+0x160/0x160 [ 60.595591] ? check_same_owner+0x320/0x320 [ 60.599950] ? rcu_note_context_switch+0x710/0x710 [ 60.604896] ? lock_acquire+0x1dc/0x520 [ 60.608888] ? __might_sleep+0x95/0x190 executing program executing program [ 60.612882] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.618435] ? futex_wait_queue_me+0x550/0x820 [ 60.623039] ? unwind_get_return_address+0x61/0xa0 [ 60.627993] ? refill_pi_state_cache.part.7+0x300/0x300 [ 60.633373] ? kasan_check_write+0x14/0x20 [ 60.637635] ? do_raw_spin_lock+0xc1/0x200 [ 60.641886] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.647434] ? print_usage_bug+0xc0/0xc0 [ 60.651513] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 60.656546] ? futex_wait_setup+0x279/0x400 [ 60.660884] ? futex_wake+0x750/0x750 executing program executing program [ 60.664711] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 60.669924] ? __lock_acquire+0x7f5/0x5140 [ 60.674184] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 60.679406] kvm_vm_ioctl+0x246/0x1d90 [ 60.683312] ? drop_futex_key_refs.isra.13+0x6d/0xe0 [ 60.688433] ? futex_wake+0x2f6/0x750 [ 60.692247] ? trace_hardirqs_off+0xd/0x10 [ 60.696498] ? kvm_set_memory_region+0x50/0x50 [ 60.701092] ? kfree+0x111/0x260 [ 60.704477] ? get_futex_key+0x1e90/0x1e90 [ 60.708739] ? __sanitizer_cov_trace_switch+0x53/0x90 executing program executing program [ 60.713945] ? lock_downgrade+0x8e0/0x8e0 [ 60.718110] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 60.723314] ? do_futex+0x249/0x27d0 [ 60.727051] ? kvm_debugfs_release+0x90/0x90 [ 60.731476] ? graph_lock+0x170/0x170 [ 60.735295] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 60.739893] ? compat_start_thread+0x80/0x80 [ 60.744316] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.749348] ? exit_robust_list+0x290/0x290 [ 60.753686] ? find_held_lock+0x36/0x1c0 [ 60.757769] ? lock_downgrade+0x8e0/0x8e0 [ 60.761937] ? kasan_check_read+0x11/0x20 executing program executing program [ 60.766095] ? rcu_is_watching+0x85/0x140 [ 60.770258] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 60.775476] ? __fget+0x40c/0x650 [ 60.778954] ? expand_files.part.8+0x9a0/0x9a0 [ 60.783554] ? trace_hardirqs_off+0xd/0x10 [ 60.787814] ? _raw_spin_unlock_irqrestore+0x63/0xc0 [ 60.792939] ? kvm_set_memory_region+0x50/0x50 [ 60.797541] do_vfs_ioctl+0x1cf/0x16a0 [ 60.801447] ? ioctl_preallocate+0x2e0/0x2e0 [ 60.805872] ? fget_raw+0x20/0x20 [ 60.809341] ? kmem_cache_free+0x25c/0x2d0 executing program executing program executing program executing program [ 60.813607] ? __x64_sys_futex+0x477/0x680 [ 60.817867] ? exit_to_usermode_loop+0x87/0x310 [ 60.822558] ? do_futex+0x27d0/0x27d0 [ 60.826384] ? security_file_ioctl+0x94/0xc0 [ 60.830804] ksys_ioctl+0xa9/0xd0 [ 60.834271] __x64_sys_ioctl+0x73/0xb0 [ 60.838171] do_syscall_64+0x1b1/0x800 [ 60.842072] ? syscall_return_slowpath+0x5c0/0x5c0 [ 60.847020] ? syscall_return_slowpath+0x30f/0x5c0 [ 60.851974] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 60.857359] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 60.862232] entry_SYSCALL_64_after_hwframe+0x49/0xbe executing program executing program [ 60.867428] RIP: 0033:0x449b49 [ 60.870622] RSP: 002b:00007f87bc9b8da8 EFLAGS: 00000297 ORIG_RAX: 0000000000000010 [ 60.878346] RAX: ffffffffffffffda RBX: 00000000006dbc44 RCX: 0000000000449b49 [ 60.885627] RDX: 0000000020000140 RSI: 000000004018aebd RDI: 0000000000000007 [ 60.892910] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 60.900188] R10: 0000000000000000 R11: 0000000000000297 R12: 6d766b2f7665642f [ 60.907467] R13: 6573756f6d2f7475 R14: 706e692f7665642f R15: 0000000000000007 executing program [ 60.914746] 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 [ 60.934001] RIP: __radix_tree_delete+0x74/0x230 RSP: ffff8801cf5e7108 [ 60.940791] ---[ end trace 10c79fe52f17b897 ]--- [ 60.945635] Kernel panic - not syncing: Fatal exception [ 60.951572] Dumping ftrace buffer: [ 60.955110] (ftrace buffer empty) [ 60.958810] Kernel Offset: disabled [ 60.962418] Rebooting in 86400 seconds..