[....] 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. [ 28.301988] kauditd_printk_skb: 7 callbacks suppressed [ 28.302001] audit: type=1800 audit(1542219358.584:29): pid=5862 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.335082] audit: type=1800 audit(1542219358.584:30): pid=5862 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.121' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.752888] ------------[ cut here ]------------ [ 35.757767] verifier bug. No program starts at insn 7 [ 35.763034] WARNING: CPU: 0 PID: 6015 at kernel/bpf/verifier.c:5880 bpf_check+0x5461/0x6310 [ 35.771516] Kernel panic - not syncing: panic_on_warn set ... [ 35.777400] CPU: 0 PID: 6015 Comm: syz-executor039 Not tainted 4.20.0-rc1-next-20181109+ #110 [ 35.786064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.795408] Call Trace: [ 35.797988] dump_stack+0x244/0x39d [ 35.801607] ? dump_stack_print_info.cold.1+0x20/0x20 [ 35.806814] panic+0x2ad/0x55c [ 35.809994] ? add_taint.cold.5+0x16/0x16 [ 35.814131] ? __warn.cold.8+0x5/0x45 [ 35.817916] ? __warn+0xe8/0x1d0 [ 35.821272] ? bpf_check+0x5461/0x6310 [ 35.825147] __warn.cold.8+0x20/0x45 [ 35.828861] ? rcu_softirq_qs+0x20/0x20 [ 35.832825] ? bpf_check+0x5461/0x6310 [ 35.836705] report_bug+0x254/0x2d0 [ 35.840321] do_error_trap+0x11b/0x200 [ 35.844198] do_invalid_op+0x36/0x40 [ 35.847899] ? bpf_check+0x5461/0x6310 [ 35.851778] invalid_op+0x14/0x20 [ 35.855220] RIP: 0010:bpf_check+0x5461/0x6310 [ 35.859704] 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 20 da 30 88 44 01 ee e8 3f e4 b8 ff <0f> 0b 48 8b 54 24 08 b8 ff ff 37 00 48 c1 e0 2a 48 c1 ea 03 0f b6 [ 35.878599] RSP: 0018:ffff8801bd437980 EFLAGS: 00010286 [ 35.883971] RAX: 0000000000000000 RBX: ffffc90005dc3040 RCX: 0000000000000000 [ 35.891229] RDX: 0000000000000000 RSI: ffffffff8165ba15 RDI: 0000000000000005 [ 35.898486] RBP: ffff8801bd437b30 R08: ffff8801c2232040 R09: ffffed003b5c3ef8 [ 35.905743] R10: ffffed003b5c3ef8 R11: ffff8801dae1f7c7 R12: 0000000000000000 [ 35.913018] R13: 0000000000000002 R14: ffffc90005dc3044 R15: ffff8801c19162c0 [ 35.920310] ? vprintk_func+0x85/0x181 [ 35.924201] ? fixup_bpf_calls+0x1ca0/0x1ca0 [ 35.928602] ? ktime_get+0x400/0x400 [ 35.932311] ? memset+0x31/0x40 [ 35.935589] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 35.941114] ? bpf_obj_name_cpy+0x17c/0x1c0 [ 35.945425] bpf_prog_load+0x113d/0x1cc0 [ 35.949479] ? bpf_prog_new_fd+0x60/0x60 [ 35.953531] ? __might_fault+0x12b/0x1e0 [ 35.957594] ? lock_downgrade+0x900/0x900 [ 35.961731] ? perf_trace_sched_process_exec+0x860/0x860 [ 35.967172] ? usercopy_warn+0x110/0x110 [ 35.971232] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.976762] __x64_sys_bpf+0x36c/0x520 [ 35.980637] ? bpf_prog_get+0x20/0x20 [ 35.984441] do_syscall_64+0x1b9/0x820 [ 35.988320] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.993683] ? syscall_return_slowpath+0x5e0/0x5e0 [ 35.998616] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.003452] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.008460] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 36.013468] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.018999] ? prepare_exit_to_usermode+0x291/0x3b0 [ 36.024031] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.028870] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.034047] RIP: 0033:0x440159 [ 36.037227] 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 [ 36.056123] RSP: 002b:00007fffab48e0d8 EFLAGS: 00000207 ORIG_RAX: 0000000000000141 [ 36.063828] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 [ 36.071092] RDX: 0000000000000048 RSI: 0000000020000000 RDI: 0000000000000005 [ 36.078351] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 36.085611] R10: 00000000ffffffff R11: 0000000000000207 R12: 00000000004019e0 [ 36.092873] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 36.101311] Kernel Offset: disabled [ 36.104998] Rebooting in 86400 seconds..