[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.982160] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.698209] random: sshd: uninitialized urandom read (32 bytes read) [ 21.976895] random: sshd: uninitialized urandom read (32 bytes read) [ 22.736204] random: sshd: uninitialized urandom read (32 bytes read) [ 22.897562] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts. [ 28.372727] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 28.466871] WARNING: CPU: 0 PID: 4489 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 28.475285] Kernel panic - not syncing: panic_on_warn set ... [ 28.475285] [ 28.482639] CPU: 0 PID: 4489 Comm: syz-executor692 Not tainted 4.17.0-rc6+ #58 [ 28.489983] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.499323] Call Trace: [ 28.501902] dump_stack+0x1b9/0x294 [ 28.505524] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.510727] ? smc_unhash_sk+0x270/0x4a0 [ 28.514775] panic+0x22f/0x4de [ 28.517950] ? add_taint.cold.5+0x16/0x16 [ 28.522104] ? __warn.cold.8+0x148/0x1b3 [ 28.526152] ? __warn.cold.8+0x117/0x1b3 [ 28.530204] ? smc_unhash_sk+0x345/0x4a0 [ 28.534253] __warn.cold.8+0x163/0x1b3 [ 28.538149] ? smc_unhash_sk+0x345/0x4a0 [ 28.542194] report_bug+0x252/0x2d0 [ 28.545820] do_error_trap+0x1de/0x490 [ 28.549692] ? graph_lock+0x170/0x170 [ 28.553485] ? math_error+0x420/0x420 [ 28.557274] ? lock_acquire+0x1dc/0x520 [ 28.561268] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.566097] do_invalid_op+0x1b/0x20 [ 28.569800] invalid_op+0x14/0x20 [ 28.573240] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 28.577896] RSP: 0018:ffff8801ac42f488 EFLAGS: 00010293 [ 28.583246] RAX: ffff8801d95a4700 RBX: ffff8801d97c47c0 RCX: ffffffff8741441e [ 28.590500] RDX: 0000000000000000 RSI: ffffffff874144d5 RDI: 0000000000000005 [ 28.597767] RBP: ffff8801ac42f570 R08: ffff8801d95a4700 R09: ffffed003b2f8908 [ 28.605033] R10: ffffed003b2f8908 R11: ffff8801d97c4843 R12: 1ffff10035885e95 [ 28.612293] R13: ffff8801ac42f548 R14: ffffffff8970da60 R15: ffff8801d97c4840 [ 28.619562] ? smc_unhash_sk+0x28e/0x4a0 [ 28.623607] ? smc_unhash_sk+0x345/0x4a0 [ 28.627652] ? smc_unhash_sk+0x345/0x4a0 [ 28.631701] ? smc_rx_data_available+0x100/0x100 [ 28.636453] ? release_sock+0x1e2/0x2b0 [ 28.640414] ? __local_bh_enable_ip+0x161/0x230 [ 28.645073] ? __release_sock+0x3a0/0x3a0 [ 28.649213] ? smc_release+0x269/0x610 [ 28.653096] ? trace_hardirqs_on+0xd/0x10 [ 28.657229] ? __local_bh_enable_ip+0x161/0x230 [ 28.661885] smc_release+0x36e/0x610 [ 28.665588] sock_release+0x96/0x1b0 [ 28.669286] ? sock_alloc_file+0x4e0/0x4e0 [ 28.673508] sock_close+0x16/0x20 [ 28.676948] __fput+0x34d/0x890 [ 28.680224] ? fput+0x1a0/0x1a0 [ 28.683491] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.687978] ____fput+0x15/0x20 [ 28.691245] task_work_run+0x1e4/0x290 [ 28.695119] ? task_work_cancel+0x240/0x240 [ 28.699427] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 28.704949] ? switch_task_namespaces+0xa2/0xd0 [ 28.709608] do_exit+0x1aee/0x2730 [ 28.713223] ? mm_update_next_owner+0x980/0x980 [ 28.717883] ? find_held_lock+0x36/0x1c0 [ 28.721936] ? lock_downgrade+0x8e0/0x8e0 [ 28.726092] ? lock_downgrade+0x8e0/0x8e0 [ 28.730235] ? kasan_check_read+0x11/0x20 [ 28.734367] ? do_raw_spin_unlock+0x9e/0x2e0 [ 28.738763] ? __local_bh_enable_ip+0x161/0x230 [ 28.743418] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.748424] ? release_sock+0x1e2/0x2b0 [ 28.752382] ? trace_hardirqs_on+0xd/0x10 [ 28.756516] ? __local_bh_enable_ip+0x161/0x230 [ 28.761171] ? _raw_spin_unlock_bh+0x30/0x40 [ 28.765563] ? release_sock+0x1e2/0x2b0 [ 28.769521] ? __release_sock+0x3a0/0x3a0 [ 28.773671] ? __local_bh_enable_ip+0x161/0x230 [ 28.778325] ? lock_sock_nested+0xe7/0x120 [ 28.782545] ? smc_sendmsg+0x2d5/0x370 [ 28.786412] ? smc_sendpage+0x1a0/0x1a0 [ 28.790374] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.795904] ? sock_sendmsg+0x5a/0x120 [ 28.799776] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.805297] ? __sys_sendto+0x475/0x670 [ 28.809256] ? __ia32_sys_getpeername+0xb0/0xb0 [ 28.813911] ? lock_downgrade+0x8e0/0x8e0 [ 28.818048] ? handle_mm_fault+0x8c0/0xc70 [ 28.822273] ? handle_mm_fault+0x55a/0xc70 [ 28.826500] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.832037] do_group_exit+0x16f/0x430 [ 28.835927] ? __ia32_sys_exit+0x50/0x50 [ 28.839990] ? do_syscall_64+0x92/0x800 [ 28.843960] __x64_sys_exit_group+0x3e/0x50 [ 28.848271] do_syscall_64+0x1b1/0x800 [ 28.852148] ? syscall_return_slowpath+0x5c0/0x5c0 [ 28.857065] ? syscall_return_slowpath+0x30f/0x5c0 [ 28.861986] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 28.867341] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.872176] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.877352] RIP: 0033:0x43e978 [ 28.880524] RSP: 002b:00007ffc0c409958 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.888216] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e978 [ 28.895477] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 28.902727] RBP: 00000000004be360 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 28.909979] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 28.917230] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 28.925150] Dumping ftrace buffer: [ 28.928774] (ftrace buffer empty) [ 28.932465] Kernel Offset: disabled [ 28.936078] Rebooting in 86400 seconds..