[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 33.998254] sshd (6202) used greatest stack depth: 15744 bytes left [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 34.140251] audit: type=1800 audit(1542221660.436:33): pid=6081 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 34.162381] audit: type=1800 audit(1542221660.436:34): pid=6081 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.025091] audit: type=1400 audit(1542221664.326:35): avc: denied { map } for pid=6257 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. executing program [ 44.688392] audit: type=1400 audit(1542221670.986:36): avc: denied { map } for pid=6270 comm="syz-executor244" path="/root/syz-executor244665442" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 44.692783] ------------[ cut here ]------------ [ 44.714740] audit: type=1400 audit(1542221670.986:37): avc: denied { prog_load } for pid=6270 comm="syz-executor244" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 44.719624] verifier bug. No program starts at insn 7 [ 44.747825] WARNING: CPU: 0 PID: 6270 at kernel/bpf/verifier.c:5880 bpf_check+0x5461/0x6310 [ 44.756303] Kernel panic - not syncing: panic_on_warn set ... [ 44.762180] CPU: 0 PID: 6270 Comm: syz-executor244 Not tainted 4.20.0-rc2+ #112 [ 44.770133] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.779471] Call Trace: [ 44.782052] dump_stack+0x244/0x39d [ 44.785669] ? dump_stack_print_info.cold.1+0x20/0x20 [ 44.790854] panic+0x2ad/0x55c [ 44.794033] ? add_taint.cold.5+0x16/0x16 [ 44.798169] ? __warn.cold.8+0x5/0x45 [ 44.801956] ? __warn+0xe8/0x1d0 [ 44.805311] ? bpf_check+0x5461/0x6310 [ 44.809202] __warn.cold.8+0x20/0x45 [ 44.812902] ? rcu_softirq_qs+0x20/0x20 [ 44.816861] ? bpf_check+0x5461/0x6310 [ 44.820732] report_bug+0x254/0x2d0 [ 44.824345] do_error_trap+0x11b/0x200 [ 44.828220] do_invalid_op+0x36/0x40 [ 44.831918] ? bpf_check+0x5461/0x6310 [ 44.835807] invalid_op+0x14/0x20 [ 44.839245] RIP: 0010:bpf_check+0x5461/0x6310 [ 44.843726] 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 [ 44.862614] RSP: 0018:ffff8881c126f980 EFLAGS: 00010286 [ 44.867962] RAX: 0000000000000000 RBX: ffffc90005e13040 RCX: 0000000000000000 [ 44.875225] RDX: 0000000000000000 RSI: ffffffff8165e7e5 RDI: 0000000000000005 [ 44.882482] RBP: ffff8881c126fb30 R08: ffff8881a322e0c0 R09: ffffed103b5c5020 [ 44.889741] R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: 0000000000000000 [ 44.897020] R13: 0000000000000002 R14: ffffc90005e13044 R15: ffff8881c0da6380 [ 44.904308] ? vprintk_func+0x85/0x181 [ 44.908208] ? fixup_bpf_calls+0x1ca0/0x1ca0 [ 44.912615] ? ktime_get+0x400/0x400 [ 44.916319] ? memset+0x31/0x40 [ 44.919601] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 44.925126] ? bpf_obj_name_cpy+0x17c/0x1c0 [ 44.929436] bpf_prog_load+0x113d/0x1cc0 [ 44.933486] ? bpf_prog_new_fd+0x60/0x60 [ 44.937552] ? __might_fault+0x12b/0x1e0 [ 44.941610] ? lock_downgrade+0x900/0x900 [ 44.945744] ? perf_trace_sched_process_exec+0x860/0x860 [ 44.951204] ? usercopy_warn+0x110/0x110 [ 44.955268] ? selinux_bpf+0xe6/0x130 [ 44.959056] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.964581] __x64_sys_bpf+0x36c/0x520 [ 44.968457] ? bpf_prog_get+0x20/0x20 [ 44.972252] do_syscall_64+0x1b9/0x820 [ 44.976124] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.981495] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.986425] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.991261] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.996273] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.001273] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.006808] ? prepare_exit_to_usermode+0x291/0x3b0 [ 45.011811] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.016646] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.021845] RIP: 0033:0x440159 [ 45.025025] 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 [ 45.043914] RSP: 002b:00007fff04546138 EFLAGS: 00000207 ORIG_RAX: 0000000000000141 [ 45.051605] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 [ 45.058868] RDX: 0000000000000048 RSI: 0000000020000000 RDI: 0000000000000005 [ 45.066137] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 45.073393] R10: 00000000ffffffff R11: 0000000000000207 R12: 00000000004019e0 [ 45.080657] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 45.089090] Kernel Offset: disabled [ 45.092775] Rebooting in 86400 seconds..