[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.021791] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.296071] random: sshd: uninitialized urandom read (32 bytes read) [ 21.682303] random: sshd: uninitialized urandom read (32 bytes read) [ 22.485640] random: sshd: uninitialized urandom read (32 bytes read) [ 22.641934] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts. [ 28.141667] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 28.231880] WARNING: CPU: 1 PID: 4509 at include/net/sock.h:644 smc_unhash_sk+0x345/0x4a0 [ 28.240273] Kernel panic - not syncing: panic_on_warn set ... [ 28.240273] [ 28.247627] CPU: 1 PID: 4509 Comm: syz-executor183 Not tainted 4.17.0+ #84 [ 28.254619] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.263950] Call Trace: [ 28.266519] dump_stack+0x1b9/0x294 [ 28.270130] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.275301] ? smc_unhash_sk+0x290/0x4a0 [ 28.279358] panic+0x22f/0x4de [ 28.282540] ? add_taint.cold.5+0x16/0x16 [ 28.286677] ? __warn.cold.8+0x148/0x1b3 [ 28.290720] ? __warn.cold.8+0x117/0x1b3 [ 28.294765] ? smc_unhash_sk+0x345/0x4a0 [ 28.298813] __warn.cold.8+0x163/0x1b3 [ 28.302679] ? smc_unhash_sk+0x345/0x4a0 [ 28.306730] report_bug+0x252/0x2d0 [ 28.310338] do_error_trap+0x1fc/0x4d0 [ 28.314206] ? math_error+0x3f0/0x3f0 [ 28.318001] ? print_usage_bug+0xc0/0xc0 [ 28.322068] ? lock_acquire+0x1dc/0x520 [ 28.326035] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.330865] do_invalid_op+0x1b/0x20 [ 28.334559] invalid_op+0x14/0x20 [ 28.337992] RIP: 0010:smc_unhash_sk+0x345/0x4a0 [ 28.342664] Code: 00 49 c7 44 24 08 00 00 00 00 41 c7 44 24 10 00 00 00 00 48 81 c4 c0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 db 40 29 fa <0f> 0b e9 51 ff ff ff 4c 89 ff 48 89 85 28 ff ff ff e8 a5 6a 66 fa [ 28.361864] RSP: 0018:ffff8801af2ff480 EFLAGS: 00010293 [ 28.367208] RAX: ffff8801af200540 RBX: ffff8801cbb46800 RCX: ffffffff8750fbfe [ 28.374456] RDX: 0000000000000000 RSI: ffffffff8750fcb5 RDI: 0000000000000005 [ 28.381705] RBP: ffff8801af2ff568 R08: ffff8801af200540 R09: ffffed0039768d10 [ 28.388951] R10: ffffed0039768d10 R11: ffff8801cbb46883 R12: 1ffff10035e5fe94 [ 28.396201] R13: ffff8801af2ff540 R14: ffffffff8992d600 R15: ffff8801cbb46880 [ 28.403471] ? smc_unhash_sk+0x28e/0x4a0 [ 28.407514] ? smc_unhash_sk+0x345/0x4a0 [ 28.411560] ? smc_rx_data_available+0x100/0x100 [ 28.416299] ? release_sock+0x1e2/0x2b0 [ 28.420252] ? __local_bh_enable_ip+0x161/0x230 [ 28.424902] ? __release_sock+0x3a0/0x3a0 [ 28.429039] ? smc_release+0x269/0x610 [ 28.432919] ? trace_hardirqs_on+0xd/0x10 [ 28.437052] ? __local_bh_enable_ip+0x161/0x230 [ 28.441705] smc_release+0x36e/0x610 [ 28.445398] __sock_release+0xd7/0x260 [ 28.449265] ? __sock_release+0x260/0x260 [ 28.453392] sock_close+0x19/0x20 [ 28.456824] __fput+0x353/0x890 [ 28.460091] ? fput+0x1a0/0x1a0 [ 28.463354] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.467828] ____fput+0x15/0x20 [ 28.471087] task_work_run+0x1e4/0x290 [ 28.474954] ? task_work_cancel+0x240/0x240 [ 28.479262] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 28.484781] ? switch_task_namespaces+0xa2/0xd0 [ 28.489430] do_exit+0x1aee/0x2730 [ 28.492951] ? mm_update_next_owner+0x980/0x980 [ 28.497599] ? lock_downgrade+0x8e0/0x8e0 [ 28.501735] ? noop_count+0x40/0x40 [ 28.505341] ? lock_pin_lock+0x350/0x350 [ 28.509383] ? kasan_check_read+0x11/0x20 [ 28.513512] ? rcu_is_watching+0x85/0x140 [ 28.517641] ? rcu_report_qs_rnp+0x790/0x790 [ 28.522045] ? is_bpf_text_address+0xd7/0x170 [ 28.526527] ? check_usage_backwards+0x151/0x3a0 [ 28.531262] ? graph_lock+0x170/0x170 [ 28.535048] ? graph_lock+0x170/0x170 [ 28.538833] ? find_held_lock+0x36/0x1c0 [ 28.542879] ? lock_downgrade+0x8e0/0x8e0 [ 28.547011] ? kasan_check_read+0x11/0x20 [ 28.551148] ? do_raw_spin_unlock+0x9e/0x2e0 [ 28.555546] ? __local_bh_enable_ip+0x161/0x230 [ 28.560196] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.565192] ? release_sock+0x1e2/0x2b0 [ 28.569146] ? trace_hardirqs_on+0xd/0x10 [ 28.573272] ? __local_bh_enable_ip+0x161/0x230 [ 28.577922] ? _raw_spin_unlock_bh+0x30/0x40 [ 28.582310] ? release_sock+0x1e2/0x2b0 [ 28.586273] ? __release_sock+0x3a0/0x3a0 [ 28.590401] ? __local_bh_enable_ip+0x161/0x230 [ 28.595058] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 28.600238] ? smc_setsockopt+0x388/0x6e0 [ 28.604370] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 28.609893] ? __sys_setsockopt+0x24f/0x390 [ 28.614198] do_group_exit+0x16f/0x430 [ 28.618069] ? mm_fault_error+0x380/0x380 [ 28.622195] ? __ia32_sys_exit+0x50/0x50 [ 28.626236] ? do_syscall_64+0x92/0x800 [ 28.630190] __x64_sys_exit_group+0x3e/0x50 [ 28.634491] do_syscall_64+0x1b1/0x800 [ 28.638360] ? syscall_return_slowpath+0x5c0/0x5c0 [ 28.643279] ? syscall_return_slowpath+0x30f/0x5c0 [ 28.648191] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 28.653545] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.658382] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.663547] RIP: 0033:0x43e8d8 [ 28.666714] Code: Bad RIP value. [ 28.670069] RSP: 002b:00007ffd6bbd00c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.677754] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e8d8 [ 28.685001] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 28.692255] RBP: 00000000004be280 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 28.699503] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 28.706750] R13: 00000000006cc160 R14: 0000000000000000 R15: 0000000000000000 [ 28.714633] Dumping ftrace buffer: [ 28.718257] (ftrace buffer empty) [ 28.721955] Kernel Offset: disabled [ 28.725567] Rebooting in 86400 seconds..