[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.493606] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.427478] random: sshd: uninitialized urandom read (32 bytes read) [ 23.907400] random: sshd: uninitialized urandom read (32 bytes read) [ 24.616746] random: sshd: uninitialized urandom read (32 bytes read) [ 24.777175] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.37' (ECDSA) to the list of known hosts. [ 30.247182] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.336133] ------------[ cut here ]------------ [ 30.340963] ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null) [ 30.351125] WARNING: CPU: 1 PID: 4490 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 [ 30.359854] Kernel panic - not syncing: panic_on_warn set ... [ 30.359854] [ 30.367206] CPU: 1 PID: 4490 Comm: syz-executor609 Not tainted 4.17.0-rc2+ #23 [ 30.374554] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.383884] Call Trace: [ 30.386453] dump_stack+0x1b9/0x294 [ 30.390067] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.395243] ? debug_print_object+0xc0/0x210 [ 30.399632] panic+0x22f/0x4de [ 30.402803] ? add_taint.cold.5+0x16/0x16 [ 30.406932] ? __warn.cold.8+0x148/0x1b3 [ 30.410969] ? __warn.cold.8+0x117/0x1b3 [ 30.415016] ? debug_print_object+0x16a/0x210 [ 30.419497] __warn.cold.8+0x163/0x1b3 [ 30.423362] ? debug_print_object+0x16a/0x210 [ 30.427836] report_bug+0x252/0x2d0 [ 30.431443] do_error_trap+0x1de/0x490 [ 30.435311] ? math_error+0x420/0x420 [ 30.439091] ? vprintk_default+0x28/0x30 [ 30.443133] ? vprintk_func+0x81/0xe7 [ 30.446913] ? printk+0x9e/0xba [ 30.450175] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.455000] do_invalid_op+0x1b/0x20 [ 30.458699] invalid_op+0x14/0x20 [ 30.462130] RIP: 0010:debug_print_object+0x16a/0x210 [ 30.467208] RSP: 0018:ffff8801af1e7880 EFLAGS: 00010086 [ 30.472549] RAX: 0000000000000061 RBX: 0000000000000005 RCX: ffffffff818433e8 [ 30.479799] RDX: 0000000000000000 RSI: ffffffff8160f561 RDI: 0000000000000001 [ 30.487053] RBP: ffff8801af1e78c0 R08: ffff8801afa62100 R09: ffffed003b5e3eb2 [ 30.494308] R10: ffffed003b5e3eb2 R11: ffff8801daf1f597 R12: 0000000000000001 [ 30.501560] R13: ffffffff88d96cc0 R14: ffffffff87fa34e0 R15: ffffffff81666d30 [ 30.508816] ? __internal_add_timer+0x2d0/0x2d0 [ 30.513479] ? irq_work_queue+0x28/0x130 [ 30.517551] ? vprintk_func+0x81/0xe7 [ 30.521338] debug_object_assert_init+0x309/0x500 [ 30.526158] ? do_raw_spin_unlock+0x9e/0x2e0 [ 30.530555] ? debug_object_init_on_stack+0x20/0x20 [ 30.535554] ? __local_bh_enable_ip+0x161/0x230 [ 30.540203] ? _raw_spin_unlock_bh+0x30/0x40 [ 30.544599] del_timer+0x74/0x140 [ 30.548042] ? detach_if_pending+0x6e0/0x6e0 [ 30.552441] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 30.557610] try_to_grab_pending+0x439/0x9a0 [ 30.562000] ? work_busy+0x340/0x340 [ 30.565702] ? graph_lock+0x170/0x170 [ 30.569483] ? print_usage_bug+0xc0/0xc0 [ 30.573525] ? find_held_lock+0x36/0x1c0 [ 30.577567] ? lock_acquire+0x1dc/0x520 [ 30.581524] ? smc_setsockopt+0x22b/0x630 [ 30.585653] ? mark_held_locks+0xc9/0x160 [ 30.589780] mod_delayed_work_on+0x91/0x250 [ 30.594080] ? try_to_grab_pending+0x9a0/0x9a0 [ 30.598641] ? __local_bh_enable_ip+0x161/0x230 [ 30.603291] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 30.608461] smc_setsockopt+0x33d/0x630 [ 30.612418] __sys_setsockopt+0x1bd/0x390 [ 30.616544] ? kernel_accept+0x310/0x310 [ 30.620590] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.626111] ? __x64_sys_poll+0x110/0x510 [ 30.630237] ? __ia32_sys_pselect6+0x270/0x270 [ 30.634802] __x64_sys_setsockopt+0xbe/0x150 [ 30.639194] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.644192] do_syscall_64+0x1b1/0x800 [ 30.648063] ? syscall_return_slowpath+0x5c0/0x5c0 [ 30.652980] ? syscall_return_slowpath+0x30f/0x5c0 [ 30.657898] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 30.663242] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.668074] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.673243] RIP: 0033:0x43fd09 [ 30.676413] RSP: 002b:00007ffe1f251c58 EFLAGS: 00000207 ORIG_RAX: 0000000000000036 [ 30.684107] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd09 [ 30.691360] RDX: 0000000000000001 RSI: 0000000000000006 RDI: 0000000000000003 [ 30.698607] RBP: 00000000006ca018 R08: 0000000000000004 R09: 00000000004002c8 [ 30.705855] R10: 0000000020000180 R11: 0000000000000207 R12: 0000000000401630 [ 30.713103] R13: 00000000004016c0 R14: 0000000000000000 R15: 0000000000000000 [ 30.720980] Dumping ftrace buffer: [ 30.724639] (ftrace buffer empty) [ 30.728329] Kernel Offset: disabled [ 30.731944] Rebooting in 86400 seconds..