[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.306250] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.780330] random: sshd: uninitialized urandom read (32 bytes read) [ 19.166155] random: sshd: uninitialized urandom read (32 bytes read) [ 20.013444] random: sshd: uninitialized urandom read (32 bytes read) [ 20.158143] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.31' (ECDSA) to the list of known hosts. [ 25.651389] random: sshd: uninitialized urandom read (32 bytes read) [ 25.754727] IPVS: ftp: loaded support on port[0] = 21 [ 25.757935] IPVS: ftp: loaded support on port[0] = 21 [ 25.765218] IPVS: ftp: loaded support on port[0] = 21 [ 25.769735] IPVS: ftp: loaded support on port[0] = 21 [ 25.778930] IPVS: ftp: loaded support on port[0] = 21 [ 25.785958] IPVS: ftp: loaded support on port[0] = 21 [ 25.793375] IPVS: ftp: loaded support on port[0] = 21 [ 25.802735] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.003462] WARNING: CPU: 0 PID: 7347 at kernel/events/core.c:1833 perf_group_attach+0x4c1/0x5a0 [ 33.012473] Kernel panic - not syncing: panic_on_warn set ... [ 33.012473] [ 33.019860] CPU: 0 PID: 7347 Comm: syz-executor154 Not tainted 4.18.0-rc5+ #67 [ 33.027221] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.036606] Call Trace: [ 33.039212] dump_stack+0x1c9/0x2b4 [ 33.042845] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.048060] panic+0x238/0x4e7 [ 33.051269] ? add_taint.cold.5+0x16/0x16 [ 33.055524] ? __warn.cold.8+0x148/0x1ba [ 33.059598] ? __warn.cold.8+0x117/0x1ba [ 33.063670] ? perf_group_attach+0x4c1/0x5a0 [ 33.068093] __warn.cold.8+0x163/0x1ba [ 33.071998] ? perf_group_attach+0x4c1/0x5a0 [ 33.076430] report_bug+0x252/0x2d0 [ 33.080069] do_error_trap+0x1fc/0x4d0 [ 33.083962] ? math_error+0x3e0/0x3e0 [ 33.087767] ? __sched_text_start+0x8/0x8 [ 33.091929] ? is_bpf_text_address+0xd7/0x170 [ 33.096432] ? kernel_text_address+0x79/0xf0 [ 33.100848] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.105693] do_invalid_op+0x1b/0x20 [ 33.109430] invalid_op+0x14/0x20 [ 33.112888] RIP: 0010:perf_group_attach+0x4c1/0x5a0 [ 33.117888] Code: 8d 7c 24 10 48 89 f8 48 c1 e8 03 42 80 3c 30 00 75 51 4d 8b 64 24 10 49 83 ec 10 4c 39 e3 75 d2 e9 f8 fe ff ff e8 8f 37 e9 ff <0f> 0b e9 e0 fc ff ff e8 b3 69 27 00 e9 ea fb ff ff e8 a9 69 27 00 [ 33.137176] RSP: 0018:ffff8801c9b07650 EFLAGS: 00010093 [ 33.142542] RAX: ffff8801d07dc300 RBX: ffff8801d05ce2c0 RCX: ffffffff8192ce06 [ 33.149817] RDX: 0000000000000000 RSI: ffffffff8192d1a1 RDI: ffff8801d0499618 [ 33.157100] RBP: ffff8801c9b076e8 R08: ffff8801d07dc300 R09: ffff88021fff801b [ 33.164374] R10: ffffed0043fff001 R11: 0000000000000000 R12: ffff8801d0499400 [ 33.171646] R13: 1ffff10039360ecc R14: 0000000000000000 R15: ffffe8ffffc133c0 [ 33.178941] ? perf_group_attach+0x126/0x5a0 [ 33.183350] ? perf_group_attach+0x4c1/0x5a0 [ 33.187765] ? debug_mutex_add_waiter+0x230/0x230 [ 33.192611] ? perf_addr_filters_splice+0x920/0x920 [ 33.197637] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.203178] ? ctx_sched_out+0x169/0xb00 [ 33.207248] __perf_install_in_context+0x593/0xb30 [ 33.212183] ? event_function_local.constprop.116+0x5e0/0x5e0 [ 33.218078] ? _raw_spin_unlock+0x22/0x30 [ 33.222248] ? __mutex_lock+0x96c/0x1820 [ 33.226330] ? __lockdep_init_map+0x105/0x590 [ 33.231648] ? event_function_local.constprop.116+0x5e0/0x5e0 [ 33.237540] remote_function+0x12c/0x1a0 [ 33.241612] generic_exec_single+0x372/0x5e0 [ 33.246031] ? perf_cgroup_attach+0xf0/0xf0 [ 33.250366] ? smp_call_on_cpu+0x540/0x540 [ 33.254616] ? kasan_kmalloc+0xc4/0xe0 [ 33.258526] smp_call_function_single+0x346/0x5c0 [ 33.263380] ? perf_cgroup_attach+0xf0/0xf0 [ 33.267715] ? generic_exec_single+0x5e0/0x5e0 [ 33.272314] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.277860] ? errseq_sample+0xe5/0x130 [ 33.281842] ? _copy_to_user+0x110/0x110 [ 33.285914] ? kasan_check_write+0x14/0x20 [ 33.290167] ? do_raw_spin_lock+0xc1/0x200 [ 33.294412] perf_install_in_context+0x46c/0x510 [ 33.299185] ? list_add_event+0xfd0/0xfd0 [ 33.303334] ? anon_inode_getfile+0x388/0x4e0 [ 33.307828] ? event_function_local.constprop.116+0x5e0/0x5e0 [ 33.313725] ? reverse_path_check_proc.cold.22+0x20/0x20 [ 33.319187] ? get_unused_fd_flags+0x122/0x1a0 [ 33.323775] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.329314] ? __perf_event_header_size.isra.39+0x15f/0x1b0 [ 33.335032] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.340586] __do_sys_perf_event_open+0x1fe4/0x30f0 [ 33.345606] ? lock_release+0xa30/0xa30 [ 33.349588] ? perf_event_set_output+0x670/0x670 [ 33.354351] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 33.359893] ? handle_mm_fault+0x55d/0xc80 [ 33.364139] ? __x64_sys_futex+0x47f/0x6a0 [ 33.368390] ? do_futex+0x27d0/0x27d0 [ 33.372212] __x64_sys_perf_event_open+0xbe/0x150 [ 33.377075] do_syscall_64+0x1b9/0x820 [ 33.380970] ? finish_task_switch+0x1d3/0x870 [ 33.385477] ? syscall_return_slowpath+0x5e0/0x5e0 [ 33.390416] ? syscall_return_slowpath+0x31d/0x5e0 [ 33.395351] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 33.400372] ? prepare_exit_to_usermode+0x291/0x3b0 [ 33.405392] ? perf_trace_sys_enter+0xb10/0xb10 [ 33.410064] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.414920] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.420113] RIP: 0033:0x449ba9 [ 33.423301] Code: e8 5c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 9b ff fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 33.442590] RSP: 002b:00007f0429d5dce8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 33.450307] RAX: ffffffffffffffda RBX: 00000000006dfc28 RCX: 0000000000449ba9 [ 33.457577] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000020000000 [ 33.464841] RBP: 00000000006dfc20 R08: 0000000000000000 R09: 0000000000000000 [ 33.472114] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000006dfc2c [ 33.479383] R13: 00007ffc707fc2cf R14: 00007f0429d5e9c0 R15: 0000000000000019 [ 33.487184] Dumping ftrace buffer: [ 33.490727] (ftrace buffer empty) [ 33.494419] Kernel Offset: disabled [ 33.498030] Rebooting in 86400 seconds..