[info] Using makefile-style concurrent boot in runlevel 2.
[   27.025929] audit: type=1800 audit(1542218508.748:21): pid=5854 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   33.118413] sshd (5993) used greatest stack depth: 15744 bytes left
Warning: Permanently added '10.128.0.67' (ECDSA) to the list of known hosts.
executing program
[   39.786362] ------------[ cut here ]------------
[   39.791785] verifier bug. No program starts at insn 7
[   39.797040] WARNING: CPU: 0 PID: 6009 at kernel/bpf/verifier.c:5902 bpf_check+0x5446/0x6300
[   39.805510] Kernel panic - not syncing: panic_on_warn set ...
[   39.811385] CPU: 0 PID: 6009 Comm: syz-executor091 Not tainted 4.20.0-rc1+ #141
[   39.818833] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   39.828171] Call Trace:
[   39.830746]  dump_stack+0x244/0x39d
[   39.834359]  ? dump_stack_print_info.cold.1+0x20/0x20
[   39.839543]  panic+0x2ad/0x55c
[   39.842717]  ? add_taint.cold.5+0x16/0x16
[   39.846853]  ? __warn.cold.8+0x5/0x45
[   39.850639]  ? __warn+0xe8/0x1d0
[   39.853991]  ? bpf_check+0x5446/0x6300
[   39.857862]  __warn.cold.8+0x20/0x45
[   39.861561]  ? rcu_softirq_qs+0x20/0x20
[   39.865518]  ? bpf_check+0x5446/0x6300
[   39.869409]  report_bug+0x254/0x2d0
[   39.873027]  do_error_trap+0x11b/0x200
[   39.876901]  do_invalid_op+0x36/0x40
[   39.880598]  ? bpf_check+0x5446/0x6300
[   39.884469]  invalid_op+0x14/0x20
[   39.887903] RIP: 0010:bpf_check+0x5446/0x6300
[   39.892389] Code: b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 69 0b 00 00 8b 73 04 48 c7 c7 40 cb 30 88 44 01 ee e8 ba 0e b9 ff <0f> 0b 48 8b 54 24 08 b8 ff ff 37 00 48 c1 e0 2a 48 c1 ea 03 0f b6
[   39.911279] RSP: 0018:ffff8801c1857980 EFLAGS: 00010286
[   39.916630] RAX: 0000000000000000 RBX: ffffc90005dc3040 RCX: 0000000000000000
[   39.923880] RDX: 0000000000000000 RSI: ffffffff8165e9a5 RDI: 0000000000000005
[   39.931132] RBP: ffff8801c1857b30 R08: ffff8801c1930640 R09: ffffed003b5c3ef8
[   39.938391] R10: ffffed003b5c3ef8 R11: ffff8801dae1f7c7 R12: 0000000000000000
[   39.945649] R13: 0000000000000002 R14: ffffc90005dc3044 R15: ffff8801c2dfca00
[   39.952918]  ? vprintk_func+0x85/0x181
[   39.956805]  ? fixup_bpf_calls+0x1cf0/0x1cf0
[   39.961201]  ? ktime_get+0x400/0x400
[   39.964904]  ? memset+0x31/0x40
[   39.968168]  ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[   39.973692]  ? bpf_obj_name_cpy+0x17c/0x1c0
[   39.978000]  bpf_prog_load+0x1146/0x1cd0
[   39.982044]  ? bpf_prog_new_fd+0x60/0x60
[   39.986091]  ? __might_fault+0x12b/0x1e0
[   39.990150]  ? lock_downgrade+0x900/0x900
[   39.994294]  ? perf_trace_sched_process_exec+0x860/0x860
[   39.999732]  ? usercopy_warn+0x110/0x110
[   40.003788]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   40.009660]  __x64_sys_bpf+0x36c/0x520
[   40.013532]  ? bpf_prog_get+0x20/0x20
[   40.017330]  do_syscall_64+0x1b9/0x820
[   40.021201]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[   40.026555]  ? syscall_return_slowpath+0x5e0/0x5e0
[   40.031471]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   40.036314]  ? trace_hardirqs_on_caller+0x310/0x310
[   40.041316]  ? prepare_exit_to_usermode+0x3b0/0x3b0
[   40.046314]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   40.051835]  ? prepare_exit_to_usermode+0x291/0x3b0
[   40.056835]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   40.061666]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   40.066838] RIP: 0033:0x440159
[   40.070016] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[   40.088901] RSP: 002b:00007fff5e865258 EFLAGS: 00000207 ORIG_RAX: 0000000000000141
[   40.096592] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159
[   40.103845] RDX: 0000000000000048 RSI: 0000000020000000 RDI: 0000000000000005
[   40.111097] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
[   40.118347] R10: 00000000ffffffff R11: 0000000000000207 R12: 00000000004019e0
[   40.125769] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000
[   40.134061] Kernel Offset: disabled
[   40.137733] Rebooting in 86400 seconds..