[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.328603] random: sshd: uninitialized urandom read (32 bytes read) [ 24.538315] sshd (4492) used greatest stack depth: 17224 bytes left [ 24.554265] random: sshd: uninitialized urandom read (32 bytes read) [ 25.320393] random: sshd: uninitialized urandom read (32 bytes read) [ 25.467645] sshd (4498) used greatest stack depth: 16296 bytes left [ 41.321183] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.7' (ECDSA) to the list of known hosts. [ 46.821073] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 46.955408] WARNING: CPU: 0 PID: 4510 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 46.963964] Kernel panic - not syncing: panic_on_warn set ... [ 46.963964] [ 46.971311] CPU: 0 PID: 4510 Comm: syz-executor665 Not tainted 4.17.0-rc4+ #47 [ 46.978647] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.987982] Call Trace: [ 46.990557] dump_stack+0x1b9/0x294 [ 46.994163] ? dump_stack_print_info.cold.2+0x52/0x52 [ 46.999337] ? smc_unhash_sk+0x310/0x4a0 [ 47.003379] panic+0x22f/0x4de [ 47.006553] ? add_taint.cold.5+0x16/0x16 [ 47.010685] ? __warn.cold.8+0x148/0x1b3 [ 47.014723] ? __warn.cold.8+0x117/0x1b3 [ 47.018765] ? smc_unhash_sk+0x345/0x4a0 [ 47.022813] __warn.cold.8+0x163/0x1b3 [ 47.026681] ? smc_unhash_sk+0x345/0x4a0 [ 47.030723] report_bug+0x252/0x2d0 [ 47.034331] do_error_trap+0x1de/0x490 [ 47.038198] ? graph_lock+0x170/0x170 [ 47.041977] ? math_error+0x420/0x420 [ 47.045763] ? lock_acquire+0x1dc/0x520 [ 47.049718] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.054541] do_invalid_op+0x1b/0x20 [ 47.058235] invalid_op+0x14/0x20 [ 47.061667] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 47.066317] RSP: 0018:ffff8801abd5f488 EFLAGS: 00010293 [ 47.071661] RAX: ffff8801b0cec740 RBX: ffff8801c7ae77c0 RCX: ffffffff8740e77e [ 47.078908] RDX: 0000000000000000 RSI: ffffffff8740e835 RDI: 0000000000000005 [ 47.086157] RBP: ffff8801abd5f570 R08: ffff8801b0cec740 R09: ffffed0038f5cf08 [ 47.093407] R10: ffffed0038f5cf08 R11: ffff8801c7ae7843 R12: 1ffff100357abe95 [ 47.100655] R13: ffff8801abd5f548 R14: ffffffff8970d520 R15: ffff8801c7ae7840 [ 47.107921] ? smc_unhash_sk+0x28e/0x4a0 [ 47.111961] ? smc_unhash_sk+0x345/0x4a0 [ 47.116003] ? smc_unhash_sk+0x345/0x4a0 [ 47.120044] ? smc_rx_data_available+0x100/0x100 [ 47.124796] ? release_sock+0x1e2/0x2b0 [ 47.128754] ? __local_bh_enable_ip+0x161/0x230 [ 47.133405] ? __release_sock+0x3a0/0x3a0 [ 47.137536] ? smc_release+0x269/0x610 [ 47.141405] ? trace_hardirqs_on+0xd/0x10 [ 47.145556] ? __local_bh_enable_ip+0x161/0x230 [ 47.150209] smc_release+0x36e/0x610 [ 47.153914] sock_release+0x96/0x1b0 [ 47.157617] ? sock_alloc_file+0x4e0/0x4e0 [ 47.161834] sock_close+0x16/0x20 [ 47.165269] __fput+0x34d/0x890 [ 47.168530] ? fput+0x1a0/0x1a0 [ 47.171789] ? _raw_spin_unlock_irq+0x27/0x70 [ 47.176266] ____fput+0x15/0x20 [ 47.179524] task_work_run+0x1e4/0x290 [ 47.183390] ? task_work_cancel+0x240/0x240 [ 47.187697] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 47.193213] ? switch_task_namespaces+0xa2/0xd0 [ 47.197866] do_exit+0x1aee/0x2730 [ 47.201388] ? mm_update_next_owner+0x980/0x980 [ 47.206044] ? find_held_lock+0x36/0x1c0 [ 47.210089] ? lock_downgrade+0x8e0/0x8e0 [ 47.214215] ? lock_downgrade+0x8e0/0x8e0 [ 47.218343] ? kasan_check_read+0x11/0x20 [ 47.222473] ? do_raw_spin_unlock+0x9e/0x2e0 [ 47.226866] ? __local_bh_enable_ip+0x161/0x230 [ 47.231512] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 47.236511] ? release_sock+0x1e2/0x2b0 [ 47.240471] ? trace_hardirqs_on+0xd/0x10 [ 47.244602] ? __local_bh_enable_ip+0x161/0x230 [ 47.249250] ? _raw_spin_unlock_bh+0x30/0x40 [ 47.253646] ? release_sock+0x1e2/0x2b0 [ 47.257611] ? __release_sock+0x3a0/0x3a0 [ 47.261744] ? __local_bh_enable_ip+0x161/0x230 [ 47.266392] ? lock_sock_nested+0xe7/0x120 [ 47.270609] ? smc_sendmsg+0x2d5/0x370 [ 47.274478] ? smc_sendpage+0x1a0/0x1a0 [ 47.278437] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.283953] ? sock_sendmsg+0x5a/0x120 [ 47.287822] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.293339] ? __sys_sendto+0x475/0x670 [ 47.297293] ? __ia32_sys_getpeername+0xb0/0xb0 [ 47.301942] ? lock_downgrade+0x8e0/0x8e0 [ 47.306067] ? handle_mm_fault+0x8c0/0xc70 [ 47.310281] ? handle_mm_fault+0x55a/0xc70 [ 47.314501] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.320031] do_group_exit+0x16f/0x430 [ 47.323895] ? mm_fault_error+0x380/0x380 [ 47.328030] ? __ia32_sys_exit+0x50/0x50 [ 47.332073] ? do_syscall_64+0x92/0x800 [ 47.336034] __x64_sys_exit_group+0x3e/0x50 [ 47.340345] do_syscall_64+0x1b1/0x800 [ 47.344215] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 47.349040] ? syscall_return_slowpath+0x5c0/0x5c0 [ 47.353952] ? syscall_return_slowpath+0x30f/0x5c0 [ 47.358866] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 47.364221] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.369046] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.374210] RIP: 0033:0x43e918 [ 47.377377] RSP: 002b:00007ffc0fe40fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 47.385062] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e918 [ 47.392308] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 47.399555] RBP: 00000000004be2c0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 47.406813] R10: ebab46bebe236ef6 R11: 0000000000000246 R12: 0000000000000001 [ 47.414064] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 47.421802] Dumping ftrace buffer: [ 47.425404] (ftrace buffer empty) [ 47.429105] Kernel Offset: disabled [ 47.432714] Rebooting in 86400 seconds..