[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.982500] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 20.677381] random: sshd: uninitialized urandom read (32 bytes read) [ 20.980935] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.714950] random: sshd: uninitialized urandom read (32 bytes read) [ 21.876995] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. [ 27.463139] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 27.554248] WARNING: CPU: 0 PID: 4532 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 27.562638] Kernel panic - not syncing: panic_on_warn set ... [ 27.562638] [ 27.569991] CPU: 0 PID: 4532 Comm: syz-executor129 Not tainted 4.17.0-rc3+ #33 [ 27.577334] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.586669] Call Trace: [ 27.589245] dump_stack+0x1b9/0x294 [ 27.592856] ? dump_stack_print_info.cold.2+0x52/0x52 [ 27.598037] ? smc_unhash_sk+0x270/0x4a0 [ 27.602079] panic+0x22f/0x4de [ 27.605253] ? add_taint.cold.5+0x16/0x16 [ 27.609381] ? __warn.cold.8+0x148/0x1b3 [ 27.613421] ? __warn.cold.8+0x117/0x1b3 [ 27.617461] ? smc_unhash_sk+0x345/0x4a0 [ 27.621505] __warn.cold.8+0x163/0x1b3 [ 27.625373] ? smc_unhash_sk+0x345/0x4a0 [ 27.629417] report_bug+0x252/0x2d0 [ 27.633043] do_error_trap+0x1de/0x490 [ 27.636928] ? graph_lock+0x170/0x170 [ 27.640719] ? math_error+0x420/0x420 [ 27.644505] ? lock_acquire+0x1dc/0x520 [ 27.648465] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.653289] do_invalid_op+0x1b/0x20 [ 27.656997] invalid_op+0x14/0x20 [ 27.660432] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 27.665087] RSP: 0018:ffff8801b4507488 EFLAGS: 00010293 [ 27.670432] RAX: ffff8801b001c1c0 RBX: ffff8801b0b477c0 RCX: ffffffff873fe71e [ 27.677681] RDX: 0000000000000000 RSI: ffffffff873fe7d5 RDI: 0000000000000005 [ 27.684931] RBP: ffff8801b4507570 R08: ffff8801b001c1c0 R09: ffffed0036168f08 [ 27.692188] R10: ffffed0036168f08 R11: ffff8801b0b47843 R12: 1ffff100368a0e95 [ 27.699438] R13: ffff8801b4507548 R14: ffffffff8970e480 R15: ffff8801b0b47840 [ 27.706706] ? smc_unhash_sk+0x28e/0x4a0 [ 27.710749] ? smc_unhash_sk+0x345/0x4a0 [ 27.714792] ? smc_unhash_sk+0x345/0x4a0 [ 27.718833] ? smc_rx_data_available+0x100/0x100 [ 27.723573] ? release_sock+0x1e2/0x2b0 [ 27.727544] ? __local_bh_enable_ip+0x161/0x230 [ 27.732200] ? __release_sock+0x3a0/0x3a0 [ 27.736330] ? smc_release+0x269/0x610 [ 27.740200] ? trace_hardirqs_on+0xd/0x10 [ 27.744337] ? __local_bh_enable_ip+0x161/0x230 [ 27.749007] smc_release+0x36e/0x610 [ 27.752715] sock_release+0x96/0x1b0 [ 27.756408] ? sock_alloc_file+0x4e0/0x4e0 [ 27.760626] sock_close+0x16/0x20 [ 27.764061] __fput+0x34d/0x890 [ 27.767328] ? fput+0x1a0/0x1a0 [ 27.770589] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.775073] ____fput+0x15/0x20 [ 27.778339] task_work_run+0x1e4/0x290 [ 27.782207] ? task_work_cancel+0x240/0x240 [ 27.786511] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 27.792035] ? switch_task_namespaces+0xa2/0xd0 [ 27.796689] do_exit+0x1aee/0x2730 [ 27.800213] ? mm_update_next_owner+0x980/0x980 [ 27.804876] ? kasan_check_read+0x11/0x20 [ 27.809005] ? do_raw_spin_unlock+0x9e/0x2e0 [ 27.813401] ? __local_bh_enable_ip+0x161/0x230 [ 27.818053] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.823053] ? release_sock+0x1e2/0x2b0 [ 27.827010] ? trace_hardirqs_on+0xd/0x10 [ 27.831143] ? __local_bh_enable_ip+0x161/0x230 [ 27.835791] ? _raw_spin_unlock_bh+0x30/0x40 [ 27.840184] ? kasan_check_read+0x11/0x20 [ 27.844317] ? rcu_is_watching+0x85/0x140 [ 27.848445] ? rcu_pm_notify+0xc0/0xc0 [ 27.852314] ? ___sys_sendmsg+0x31a/0x940 [ 27.856440] ? kfree+0x1e9/0x260 [ 27.859784] ? ___sys_sendmsg+0x31f/0x940 [ 27.863915] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.869436] ? __handle_mm_fault+0x93a/0x4310 [ 27.873914] ? copy_msghdr_from_user+0x560/0x560 [ 27.878648] ? vm_insert_mixed_mkwrite+0x40/0x40 [ 27.883380] ? graph_lock+0x170/0x170 [ 27.887159] ? find_held_lock+0x36/0x1c0 [ 27.891202] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.896718] ? __fget_light+0x2ef/0x430 [ 27.900671] ? fget_raw+0x20/0x20 [ 27.904102] ? find_held_lock+0x36/0x1c0 [ 27.908145] ? lock_downgrade+0x8e0/0x8e0 [ 27.912284] ? handle_mm_fault+0x8c0/0xc70 [ 27.916504] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 27.922031] ? sockfd_lookup_light+0xc5/0x160 [ 27.926509] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.932034] ? __sys_sendmsg+0x1aa/0x270 [ 27.936081] ? __ia32_sys_shutdown+0x80/0x80 [ 27.940470] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.945987] ? __do_page_fault+0x441/0xe40 [ 27.950453] do_group_exit+0x16f/0x430 [ 27.954339] ? __ia32_sys_exit+0x50/0x50 [ 27.958402] ? do_syscall_64+0x92/0x800 [ 27.962357] __x64_sys_exit_group+0x3e/0x50 [ 27.966659] do_syscall_64+0x1b1/0x800 [ 27.970525] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 27.975431] ? syscall_return_slowpath+0x5c0/0x5c0 [ 27.980339] ? syscall_return_slowpath+0x30f/0x5c0 [ 27.985249] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 27.990599] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.995424] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.000590] RIP: 0033:0x43e978 [ 28.003767] RSP: 002b:00007ffebf648c98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.011460] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e978 [ 28.018720] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 28.025968] RBP: 00000000004be320 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 28.033214] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000000001 [ 28.040460] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 28.048343] Dumping ftrace buffer: [ 28.051974] (ftrace buffer empty) [ 28.055665] Kernel Offset: disabled [ 28.059287] Rebooting in 86400 seconds..