[....] 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. [ 28.688126] kauditd_printk_skb: 7 callbacks suppressed [ 28.688137] audit: type=1800 audit(1542219392.289:29): pid=5835 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.714717] audit: type=1800 audit(1542219392.289:30): pid=5835 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.73' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.450000] ------------[ cut here ]------------ [ 77.455007] verifier bug. No program starts at insn 7 [ 77.460268] WARNING: CPU: 1 PID: 5993 at kernel/bpf/verifier.c:5880 bpf_check+0x5461/0x6310 [ 77.468738] Kernel panic - not syncing: panic_on_warn set ... [ 77.474617] CPU: 1 PID: 5993 Comm: syz-executor286 Not tainted 4.20.0-rc2+ #111 [ 77.482048] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.491394] Call Trace: [ 77.493980] dump_stack+0x244/0x39d [ 77.497593] ? dump_stack_print_info.cold.1+0x20/0x20 [ 77.502784] panic+0x2ad/0x55c [ 77.505968] ? add_taint.cold.5+0x16/0x16 [ 77.510106] ? __warn.cold.8+0x5/0x45 [ 77.513895] ? __warn+0xe8/0x1d0 [ 77.517252] ? bpf_check+0x5461/0x6310 [ 77.521124] __warn.cold.8+0x20/0x45 [ 77.524824] ? rcu_softirq_qs+0x20/0x20 [ 77.528787] ? bpf_check+0x5461/0x6310 [ 77.532660] report_bug+0x254/0x2d0 [ 77.536274] do_error_trap+0x11b/0x200 [ 77.540154] do_invalid_op+0x36/0x40 [ 77.543874] ? bpf_check+0x5461/0x6310 [ 77.547751] invalid_op+0x14/0x20 [ 77.551197] RIP: 0010:bpf_check+0x5461/0x6310 [ 77.555683] 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 c0 ca 30 88 44 01 ee e8 4f 14 b9 ff <0f> 0b 48 8b 54 24 08 b8 ff ff 37 00 48 c1 e0 2a 48 c1 ea 03 0f b6 [ 77.574575] RSP: 0018:ffff8881c0bf7980 EFLAGS: 00010286 [ 77.579927] RAX: 0000000000000000 RBX: ffffc90005ddd040 RCX: 0000000000000000 [ 77.587332] RDX: 0000000000000000 RSI: ffffffff8165e7e5 RDI: 0000000000000005 [ 77.594596] RBP: ffff8881c0bf7b30 R08: ffff8881b36d0640 R09: ffffed103b5e3ef8 [ 77.601854] R10: ffffed103b5e3ef8 R11: ffff8881daf1f7c7 R12: 0000000000000000 [ 77.609177] R13: 0000000000000002 R14: ffffc90005ddd044 R15: ffff8881c019c180 [ 77.616465] ? vprintk_func+0x85/0x181 [ 77.620351] ? fixup_bpf_calls+0x1ca0/0x1ca0 [ 77.624751] ? ktime_get+0x400/0x400 [ 77.628471] ? memset+0x31/0x40 [ 77.631742] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.637276] ? bpf_obj_name_cpy+0x17c/0x1c0 [ 77.641592] bpf_prog_load+0x113d/0x1cc0 [ 77.645644] ? bpf_prog_new_fd+0x60/0x60 [ 77.649693] ? __might_fault+0x12b/0x1e0 [ 77.653746] ? lock_downgrade+0x900/0x900 [ 77.657879] ? perf_trace_sched_process_exec+0x860/0x860 [ 77.663315] ? usercopy_warn+0x110/0x110 [ 77.667370] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.672895] __x64_sys_bpf+0x36c/0x520 [ 77.676766] ? bpf_prog_get+0x20/0x20 [ 77.680561] do_syscall_64+0x1b9/0x820 [ 77.684432] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 77.689782] ? syscall_return_slowpath+0x5e0/0x5e0 [ 77.694700] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 77.699529] ? trace_hardirqs_on_caller+0x310/0x310 [ 77.704531] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 77.709545] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.715085] ? prepare_exit_to_usermode+0x291/0x3b0 [ 77.720092] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 77.724923] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.730094] RIP: 0033:0x440159 [ 77.733276] 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 [ 77.752169] RSP: 002b:00007fff5daba998 EFLAGS: 00000207 ORIG_RAX: 0000000000000141 [ 77.759861] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 [ 77.767117] RDX: 0000000000000048 RSI: 0000000020000000 RDI: 0000000000000005 [ 77.774368] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 77.781729] R10: 00000000ffffffff R11: 0000000000000207 R12: 00000000004019e0 [ 77.788984] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 77.797433] Kernel Offset: disabled [ 77.801119] Rebooting in 86400 seconds..