[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.683117] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.225136] random: sshd: uninitialized urandom read (32 bytes read) [ 23.645608] random: sshd: uninitialized urandom read (32 bytes read) [ 24.378430] random: sshd: uninitialized urandom read (32 bytes read) [ 24.534924] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.19' (ECDSA) to the list of known hosts. [ 30.027698] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.130913] WARNING: CPU: 1 PID: 4500 at include/net/sock.h:639 smc_unhash_sk+0x345/0x4a0 [ 30.139299] Kernel panic - not syncing: panic_on_warn set ... [ 30.139299] [ 30.146644] CPU: 1 PID: 4500 Comm: syz-executor428 Not tainted 4.17.0-rc2+ #26 [ 30.153979] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.163307] Call Trace: [ 30.165879] dump_stack+0x1b9/0x294 [ 30.169487] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.174662] ? smc_unhash_sk+0x290/0x4a0 [ 30.178707] panic+0x22f/0x4de [ 30.181880] ? add_taint.cold.5+0x16/0x16 [ 30.186017] ? __warn.cold.8+0x148/0x1b3 [ 30.190066] ? __warn.cold.8+0x117/0x1b3 [ 30.194108] ? smc_unhash_sk+0x345/0x4a0 [ 30.198148] __warn.cold.8+0x163/0x1b3 [ 30.202018] ? smc_unhash_sk+0x345/0x4a0 [ 30.206069] report_bug+0x252/0x2d0 [ 30.209676] do_error_trap+0x1de/0x490 [ 30.213542] ? graph_lock+0x170/0x170 [ 30.217322] ? math_error+0x420/0x420 [ 30.221105] ? lock_acquire+0x1dc/0x520 [ 30.225064] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.229891] do_invalid_op+0x1b/0x20 [ 30.233587] invalid_op+0x14/0x20 [ 30.237029] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 30.241675] RSP: 0018:ffff8801acc1f488 EFLAGS: 00010293 [ 30.247026] RAX: ffff8801af640600 RBX: ffff8801ad5607c0 RCX: ffffffff873faafe [ 30.254284] RDX: 0000000000000000 RSI: ffffffff873fabb5 RDI: 0000000000000005 [ 30.261531] RBP: ffff8801acc1f570 R08: ffff8801af640600 R09: ffffed0035aac108 [ 30.268777] R10: ffffed0035aac108 R11: ffff8801ad560843 R12: 1ffff10035983e95 [ 30.276030] R13: ffff8801acc1f548 R14: ffffffff8970df20 R15: ffff8801ad560840 [ 30.283297] ? smc_unhash_sk+0x28e/0x4a0 [ 30.287337] ? smc_unhash_sk+0x345/0x4a0 [ 30.291380] ? smc_unhash_sk+0x345/0x4a0 [ 30.295421] ? smc_hash_sk+0x2f0/0x2f0 [ 30.299290] ? release_sock+0x1e2/0x2b0 [ 30.303243] ? __local_bh_enable_ip+0x161/0x230 [ 30.307891] ? __release_sock+0x3a0/0x3a0 [ 30.312030] ? smc_release+0x269/0x610 [ 30.315900] ? trace_hardirqs_on+0xd/0x10 [ 30.320038] ? __local_bh_enable_ip+0x161/0x230 [ 30.324688] smc_release+0x36e/0x610 [ 30.328387] sock_release+0x96/0x1b0 [ 30.332085] ? sock_alloc_file+0x4e0/0x4e0 [ 30.336299] sock_close+0x16/0x20 [ 30.339732] __fput+0x34d/0x890 [ 30.342993] ? fput+0x1a0/0x1a0 [ 30.346257] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.350744] ____fput+0x15/0x20 [ 30.354008] task_work_run+0x1e4/0x290 [ 30.357883] ? task_work_cancel+0x240/0x240 [ 30.362185] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 30.367705] ? switch_task_namespaces+0xa2/0xd0 [ 30.372354] do_exit+0x1aee/0x2730 [ 30.375884] ? mm_update_next_owner+0x980/0x980 [ 30.380538] ? find_held_lock+0x36/0x1c0 [ 30.384585] ? lock_downgrade+0x8e0/0x8e0 [ 30.388716] ? lock_downgrade+0x8e0/0x8e0 [ 30.392852] ? kasan_check_read+0x11/0x20 [ 30.396982] ? do_raw_spin_unlock+0x9e/0x2e0 [ 30.401374] ? __local_bh_enable_ip+0x161/0x230 [ 30.406115] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.411114] ? release_sock+0x1e2/0x2b0 [ 30.415070] ? trace_hardirqs_on+0xd/0x10 [ 30.419197] ? __local_bh_enable_ip+0x161/0x230 [ 30.423847] ? _raw_spin_unlock_bh+0x30/0x40 [ 30.428235] ? release_sock+0x1e2/0x2b0 [ 30.432199] ? __release_sock+0x3a0/0x3a0 [ 30.436336] ? __local_bh_enable_ip+0x161/0x230 [ 30.440994] ? lock_sock_nested+0xe7/0x120 [ 30.445221] ? smc_sendmsg+0x2d5/0x370 [ 30.449090] ? smc_recvmsg+0x300/0x300 [ 30.452957] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.458471] ? sock_sendmsg+0x5a/0x120 [ 30.462339] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.467870] ? __sys_sendto+0x475/0x670 [ 30.471839] ? __ia32_sys_getpeername+0xb0/0xb0 [ 30.476504] ? lock_downgrade+0x8e0/0x8e0 [ 30.480632] ? handle_mm_fault+0x8c0/0xc70 [ 30.484849] ? handle_mm_fault+0x55a/0xc70 [ 30.489079] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.494601] do_group_exit+0x16f/0x430 [ 30.498466] ? mm_fault_error+0x380/0x380 [ 30.502595] ? __ia32_sys_exit+0x50/0x50 [ 30.506636] ? do_syscall_64+0x92/0x800 [ 30.510591] __x64_sys_exit_group+0x3e/0x50 [ 30.514907] do_syscall_64+0x1b1/0x800 [ 30.518782] ? syscall_return_slowpath+0x5c0/0x5c0 [ 30.523702] ? syscall_return_slowpath+0x30f/0x5c0 [ 30.528615] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 30.533961] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.538792] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.543961] RIP: 0033:0x43e918 [ 30.547129] RSP: 002b:00007ffdb6e48c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 30.554825] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e918 [ 30.562073] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 30.569320] RBP: 00000000004be2c0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 30.576572] R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000001 [ 30.583827] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 30.591619] Dumping ftrace buffer: [ 30.595224] (ftrace buffer empty) [ 30.598910] Kernel Offset: disabled [ 30.602517] Rebooting in 86400 seconds..