[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.003325] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.366545] random: sshd: uninitialized urandom read (32 bytes read) [ 23.536300] random: sshd: uninitialized urandom read (32 bytes read) [ 24.361087] random: sshd: uninitialized urandom read (32 bytes read) [ 40.595793] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.60' (ECDSA) to the list of known hosts. [ 46.119637] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 46.214713] WARNING: CPU: 0 PID: 4543 at include/net/sock.h:644 smc_unhash_sk+0x357/0x4b0 [ 46.223123] Kernel panic - not syncing: panic_on_warn set ... [ 46.223123] [ 46.230473] CPU: 0 PID: 4543 Comm: syz-executor207 Not tainted 4.18.0-rc5+ #149 [ 46.237898] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.247231] Call Trace: [ 46.249809] dump_stack+0x1c9/0x2b4 [ 46.253434] ? dump_stack_print_info.cold.2+0x52/0x52 [ 46.258611] panic+0x238/0x4e7 [ 46.261795] ? add_taint.cold.5+0x16/0x16 [ 46.265929] ? __warn.cold.8+0x148/0x1ba [ 46.269974] ? __warn.cold.8+0x117/0x1ba [ 46.274020] ? smc_unhash_sk+0x357/0x4b0 [ 46.278064] __warn.cold.8+0x163/0x1ba [ 46.281935] ? smc_unhash_sk+0x357/0x4b0 [ 46.285981] report_bug+0x252/0x2d0 [ 46.289595] do_error_trap+0x1fc/0x4d0 [ 46.293466] ? math_error+0x3e0/0x3e0 [ 46.297265] ? print_usage_bug+0xc0/0xc0 [ 46.301319] ? lock_acquire+0x1e4/0x540 [ 46.305282] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.310108] do_invalid_op+0x1b/0x20 [ 46.313809] invalid_op+0x14/0x20 [ 46.317250] RIP: 0010:smc_unhash_sk+0x357/0x4b0 [ 46.321901] Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 88 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 89 42 1a fa <0f> 0b e9 47 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 73 21 58 fa [ 46.341092] RSP: 0018:ffff8801b49cf480 EFLAGS: 00010293 [ 46.346455] RAX: ffff8801d8c88640 RBX: ffff8801d8e730c0 RCX: ffffffff8761c7f6 [ 46.353714] RDX: 0000000000000000 RSI: ffffffff8761c8b7 RDI: 0000000000000005 [ 46.360969] RBP: ffff8801b49cf568 R08: ffff8801d8c88640 R09: ffffed003b1ce628 [ 46.368227] R10: ffffed003b1ce628 R11: ffff8801d8e73143 R12: 1ffff10036939e94 [ 46.375492] R13: ffff8801b49cf540 R14: ffffffff899373c0 R15: ffff8801d8e73140 [ 46.382772] ? smc_unhash_sk+0x296/0x4b0 [ 46.386821] ? smc_unhash_sk+0x357/0x4b0 [ 46.390969] ? smc_rx_data_available+0x120/0x120 [ 46.395726] ? release_sock+0x1ec/0x2c0 [ 46.399696] ? __local_bh_enable_ip+0x161/0x230 [ 46.404346] ? __release_sock+0x3a0/0x3a0 [ 46.408477] ? smc_release+0x2c9/0x670 [ 46.412349] ? trace_hardirqs_on+0xd/0x10 [ 46.416475] ? __local_bh_enable_ip+0x161/0x230 [ 46.421130] smc_release+0x3cf/0x670 [ 46.424831] __sock_release+0xd7/0x260 [ 46.428701] ? __sock_release+0x260/0x260 [ 46.432830] sock_close+0x19/0x20 [ 46.436366] __fput+0x355/0x8b0 [ 46.439674] ? fput+0x1a0/0x1a0 [ 46.442937] ? _raw_spin_unlock_irq+0x27/0x70 [ 46.447417] ____fput+0x15/0x20 [ 46.450686] task_work_run+0x1ec/0x2a0 [ 46.454572] ? task_work_cancel+0x250/0x250 [ 46.458878] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 46.464395] ? switch_task_namespaces+0xa2/0xd0 [ 46.469042] do_exit+0x1b08/0x2750 [ 46.472563] ? mm_update_next_owner+0x9a0/0x9a0 [ 46.477214] ? lock_pin_lock+0x350/0x350 [ 46.481262] ? kasan_check_read+0x11/0x20 [ 46.485402] ? rcu_is_watching+0x8c/0x150 [ 46.489538] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 46.493943] ? check_usage_backwards+0x164/0x3d0 [ 46.498683] ? print_shortest_lock_dependencies+0x80/0x80 [ 46.504198] ? unwind_get_return_address+0x61/0xa0 [ 46.509117] ? graph_lock+0x170/0x170 [ 46.512895] ? graph_lock+0x170/0x170 [ 46.516683] ? find_held_lock+0x36/0x1c0 [ 46.520730] ? lock_downgrade+0x8f0/0x8f0 [ 46.524865] ? kasan_check_read+0x11/0x20 [ 46.529004] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.533397] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 46.538395] ? release_sock+0x1ec/0x2c0 [ 46.542352] ? trace_hardirqs_on+0xd/0x10 [ 46.546478] ? __local_bh_enable_ip+0x161/0x230 [ 46.551131] ? _raw_spin_unlock_bh+0x30/0x40 [ 46.555520] ? release_sock+0x1ec/0x2c0 [ 46.559486] ? __release_sock+0x3a0/0x3a0 [ 46.563617] ? __local_bh_enable_ip+0x161/0x230 [ 46.568272] ? smc_setsockopt+0x388/0x6e0 [ 46.572409] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.577937] ? __sys_setsockopt+0x257/0x3b0 [ 46.582260] do_group_exit+0x177/0x440 [ 46.586137] ? mm_fault_error+0x380/0x380 [ 46.590266] ? __ia32_sys_exit+0x50/0x50 [ 46.594328] ? do_syscall_64+0x9a/0x820 [ 46.598292] __x64_sys_exit_group+0x3e/0x50 [ 46.602616] do_syscall_64+0x1b9/0x820 [ 46.606500] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.611414] ? syscall_return_slowpath+0x31d/0x5e0 [ 46.616343] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 46.621690] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.626519] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.631787] RIP: 0033:0x43ec88 [ 46.634963] Code: Bad RIP value. [ 46.638414] RSP: 002b:00007ffcabed52d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.646105] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 46.653354] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 46.660605] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 46.667862] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 46.675386] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 46.683266] Dumping ftrace buffer: [ 46.686919] (ftrace buffer empty) [ 46.690626] Kernel Offset: disabled [ 46.694245] Rebooting in 86400 seconds..