[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.925783] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.994281] random: sshd: uninitialized urandom read (32 bytes read) [ 25.384207] random: sshd: uninitialized urandom read (32 bytes read) [ 26.102063] random: sshd: uninitialized urandom read (32 bytes read) [ 35.437439] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.19' (ECDSA) to the list of known hosts. [ 40.876501] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 40.967327] WARNING: CPU: 0 PID: 4499 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 40.975727] Kernel panic - not syncing: panic_on_warn set ... [ 40.975727] [ 40.983078] CPU: 0 PID: 4499 Comm: syz-executor591 Not tainted 4.17.0-rc3+ #37 [ 40.990416] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.999749] Call Trace: [ 41.002326] dump_stack+0x1b9/0x294 [ 41.006207] ? dump_stack_print_info.cold.2+0x52/0x52 [ 41.011386] ? smc_unhash_sk+0x320/0x4a0 [ 41.015431] panic+0x22f/0x4de [ 41.018622] ? add_taint.cold.5+0x16/0x16 [ 41.022750] ? __warn.cold.8+0x148/0x1b3 [ 41.026789] ? __warn.cold.8+0x117/0x1b3 [ 41.030840] ? smc_unhash_sk+0x345/0x4a0 [ 41.034878] __warn.cold.8+0x163/0x1b3 [ 41.038742] ? smc_unhash_sk+0x345/0x4a0 [ 41.042785] report_bug+0x252/0x2d0 [ 41.046393] do_error_trap+0x1de/0x490 [ 41.050261] ? graph_lock+0x170/0x170 [ 41.054041] ? math_error+0x420/0x420 [ 41.057826] ? lock_acquire+0x1dc/0x520 [ 41.061782] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.066607] do_invalid_op+0x1b/0x20 [ 41.070301] invalid_op+0x14/0x20 [ 41.073734] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 41.078378] RSP: 0018:ffff8801ac677488 EFLAGS: 00010293 [ 41.083723] RAX: ffff8801d97be280 RBX: ffff8801accc37c0 RCX: ffffffff873f756e [ 41.090972] RDX: 0000000000000000 RSI: ffffffff873f7625 RDI: 0000000000000005 [ 41.098801] RBP: ffff8801ac677570 R08: ffff8801d97be280 R09: ffffed0035998708 [ 41.106055] R10: ffffed0035998708 R11: ffff8801accc3843 R12: 1ffff100358cee95 [ 41.113303] R13: ffff8801ac677548 R14: ffffffff8970b180 R15: ffff8801accc3840 [ 41.120596] ? smc_unhash_sk+0x28e/0x4a0 [ 41.124637] ? smc_unhash_sk+0x345/0x4a0 [ 41.128688] ? smc_unhash_sk+0x345/0x4a0 [ 41.132730] ? smc_rx_data_available+0x100/0x100 [ 41.137466] ? release_sock+0x1e2/0x2b0 [ 41.141423] ? __local_bh_enable_ip+0x161/0x230 [ 41.146081] ? __release_sock+0x3a0/0x3a0 [ 41.150207] ? smc_release+0x269/0x610 [ 41.154076] ? trace_hardirqs_on+0xd/0x10 [ 41.158204] ? __local_bh_enable_ip+0x161/0x230 [ 41.162852] smc_release+0x36e/0x610 [ 41.166556] sock_release+0x96/0x1b0 [ 41.170282] ? sock_alloc_file+0x4e0/0x4e0 [ 41.174496] sock_close+0x16/0x20 [ 41.177932] __fput+0x34d/0x890 [ 41.181191] ? fput+0x1a0/0x1a0 [ 41.184453] ? _raw_spin_unlock_irq+0x27/0x70 [ 41.188930] ____fput+0x15/0x20 [ 41.192189] task_work_run+0x1e4/0x290 [ 41.196083] ? task_work_cancel+0x240/0x240 [ 41.200385] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 41.205902] ? switch_task_namespaces+0xa2/0xd0 [ 41.210556] do_exit+0x1aee/0x2730 [ 41.214083] ? mm_update_next_owner+0x980/0x980 [ 41.218731] ? lock_downgrade+0x8e0/0x8e0 [ 41.222857] ? noop_count+0x40/0x40 [ 41.226461] ? lock_pin_lock+0x350/0x350 [ 41.230506] ? kasan_check_read+0x11/0x20 [ 41.234636] ? rcu_is_watching+0x85/0x140 [ 41.238783] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 41.243956] ? is_bpf_text_address+0xd7/0x170 [ 41.248432] ? check_usage_backwards+0x151/0x3a0 [ 41.253179] ? graph_lock+0x170/0x170 [ 41.256955] ? graph_lock+0x170/0x170 [ 41.260738] ? find_held_lock+0x36/0x1c0 [ 41.264781] ? lock_downgrade+0x8e0/0x8e0 [ 41.268910] ? kasan_check_read+0x11/0x20 [ 41.273046] ? do_raw_spin_unlock+0x9e/0x2e0 [ 41.277435] ? __local_bh_enable_ip+0x161/0x230 [ 41.282083] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.287087] ? release_sock+0x1e2/0x2b0 [ 41.291039] ? trace_hardirqs_on+0xd/0x10 [ 41.295167] ? __local_bh_enable_ip+0x161/0x230 [ 41.299815] ? _raw_spin_unlock_bh+0x30/0x40 [ 41.304201] ? release_sock+0x1e2/0x2b0 [ 41.308157] ? __release_sock+0x3a0/0x3a0 [ 41.312296] ? __local_bh_enable_ip+0x161/0x230 [ 41.316947] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 41.322128] ? smc_setsockopt+0x1ed/0x630 [ 41.326258] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.331797] ? __sys_setsockopt+0x24f/0x390 [ 41.336104] do_group_exit+0x16f/0x430 [ 41.339971] ? mm_fault_error+0x380/0x380 [ 41.344108] ? __ia32_sys_exit+0x50/0x50 [ 41.348170] ? do_syscall_64+0x92/0x800 [ 41.352127] __x64_sys_exit_group+0x3e/0x50 [ 41.356427] do_syscall_64+0x1b1/0x800 [ 41.360297] ? syscall_return_slowpath+0x5c0/0x5c0 [ 41.365204] ? syscall_return_slowpath+0x30f/0x5c0 [ 41.370126] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 41.375471] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.380294] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.385460] RIP: 0033:0x43e8d8 [ 41.388640] RSP: 002b:00007ffd46f05328 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 41.396331] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 41.403584] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 41.410838] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 41.418103] R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000001 [ 41.425366] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 41.433214] Dumping ftrace buffer: [ 41.436852] (ftrace buffer empty) [ 41.440562] Kernel Offset: disabled [ 41.444176] Rebooting in 86400 seconds..