[ 43.929997][ T26] audit: type=1800 audit(1563324524.278:26): pid=7782 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 43.960356][ T26] audit: type=1800 audit(1563324524.278:27): pid=7782 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 43.998935][ T26] audit: type=1800 audit(1563324524.288:28): pid=7782 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 44.579604][ T26] audit: type=1800 audit(1563324524.958:29): pid=7782 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.182' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.948295][ T7931] ------------[ cut here ]------------ [ 63.954192][ T7931] verifier backtracking bug [ 63.954254][ T7931] WARNING: CPU: 0 PID: 7931 at kernel/bpf/verifier.c:1785 __mark_chain_precision+0x2279/0x23b0 [ 63.969453][ T7931] Kernel panic - not syncing: panic_on_warn set ... [ 63.976160][ T7931] CPU: 0 PID: 7931 Comm: syz-executor240 Not tainted 5.2.0+ #31 [ 63.983782][ T7931] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.993941][ T7931] Call Trace: [ 63.997291][ T7931] dump_stack+0x1d8/0x2f8 [ 64.001757][ T7931] panic+0x29b/0x7d9 [ 64.005889][ T7931] ? __warn+0x126/0x230 [ 64.010047][ T7931] ? nmi_panic+0x97/0x97 [ 64.014365][ T7931] ? __probe_kernel_read+0x140/0x1a0 [ 64.019898][ T7931] ? is_valid_bugaddr+0x81/0x100 [ 64.024969][ T7931] __warn+0x22f/0x230 [ 64.028965][ T7931] ? __mark_chain_precision+0x2279/0x23b0 [ 64.034892][ T7931] report_bug+0x190/0x290 [ 64.039401][ T7931] ? __mark_chain_precision+0x2279/0x23b0 [ 64.045290][ T7931] do_error_trap+0xd7/0x440 [ 64.049972][ T7931] do_invalid_op+0x36/0x40 [ 64.054564][ T7931] ? __mark_chain_precision+0x2279/0x23b0 [ 64.060616][ T7931] invalid_op+0x14/0x20 [ 64.064763][ T7931] RIP: 0010:__mark_chain_precision+0x2279/0x23b0 [ 64.071176][ T7931] Code: 0f 8c 39 df ff ff e8 c6 9a 29 00 e9 2f df ff ff e8 fc 1d ef ff c6 05 97 ea 71 07 01 48 c7 c7 f0 f8 7d 88 31 c0 e8 17 59 c0 ff <0f> 0b e9 49 e1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 50 df ff [ 64.091634][ T7931] RSP: 0018:ffff8880a164ec80 EFLAGS: 00010246 [ 64.098770][ T7931] RAX: 88c484461bc5e000 RBX: 0000000000000000 RCX: ffff8880908066c0 [ 64.106880][ T7931] RDX: 0000000000000000 RSI: ffffffff81602038 RDI: 0000000000000286 [ 64.115001][ T7931] RBP: ffff8880a164ee30 R08: ffff888090806f10 R09: fffffbfff119a91f [ 64.122989][ T7931] R10: fffffbfff119a91f R11: 0000000000000000 R12: 0000000000000000 [ 64.131064][ T7931] R13: ffff8880a289e810 R14: 0000000000000000 R15: 0000000000000001 [ 64.139318][ T7931] ? vprintk_default+0x28/0x30 [ 64.144137][ T7931] ? regsafe+0x1120/0x1120 [ 64.148666][ T7931] ? krealloc+0xc9/0xe0 [ 64.152820][ T7931] ? kmalloc_array+0x60/0x60 [ 64.157442][ T7931] ? check_reg_arg+0x8fe/0xb20 [ 64.162280][ T7931] do_check+0x874d/0x22ef0 [ 64.167081][ T7931] ? stack_depot_save+0x374/0x470 [ 64.172121][ T7931] ? kvfree+0x47/0x50 [ 64.176102][ T7931] ? quarantine_put+0xb7/0x1f0 [ 64.180998][ T7931] ? bpf_check+0xe9e0/0xe9e0 [ 64.185577][ T7931] ? debug_check_no_obj_freed+0x505/0x5b0 [ 64.191605][ T7931] ? __lock_acquire+0x4750/0x4750 [ 64.196739][ T7931] ? kfree+0x194/0x200 [ 64.200792][ T7931] ? kvfree+0x47/0x50 [ 64.204777][ T7931] ? trace_hardirqs_on+0x74/0x80 [ 64.209736][ T7931] bpf_check+0x3f32/0xe9e0 [ 64.214168][ T7931] ? __kasan_check_read+0x11/0x20 [ 64.219524][ T7931] ? __lock_acquire+0xd9a/0x4750 [ 64.224566][ T7931] ? __kasan_check_read+0x11/0x20 [ 64.229611][ T7931] ? bpf_verifier_log_write+0x230/0x230 [ 64.235158][ T7931] ? trace_lock_acquire+0x1d0/0x1d0 [ 64.240622][ T7931] ? trace_lock_acquire+0x1d0/0x1d0 [ 64.246172][ T7931] ? pcpu_alloc+0xc4b/0x10f0 [ 64.250756][ T7931] ? __lock_acquire+0x4750/0x4750 [ 64.256214][ T7931] ? check_preemption_disabled+0x47/0x2a0 [ 64.262022][ T7931] ? ktime_get_with_offset+0x98/0x180 [ 64.267393][ T7931] ? __lock_acquire+0x4750/0x4750 [ 64.272410][ T7931] ? read_seqcount_begin+0x12a/0x1c0 [ 64.277735][ T7931] ? memset+0x31/0x40 [ 64.281720][ T7931] ? bpf_obj_name_cpy+0x9a9/0x1400 [ 64.286942][ T7931] __do_sys_bpf+0x8278/0xc6d0 [ 64.291632][ T7931] ? check_preemption_disabled+0xb7/0x2a0 [ 64.297404][ T7931] ? __bpf_prog_put_rcu+0x320/0x320 [ 64.302620][ T7931] ? trace_hardirqs_on+0x74/0x80 [ 64.307564][ T7931] ? do_huge_pmd_anonymous_page+0x1552/0x1ba0 [ 64.313615][ T7931] ? rcu_lock_release+0x9/0x30 [ 64.318534][ T7931] ? thp_get_unmapped_area+0xa0/0xa0 [ 64.324077][ T7931] ? handle_mm_fault+0x10d0/0x6060 [ 64.329258][ T7931] ? __up_read+0x225/0x5b0 [ 64.333679][ T7931] ? __down_read+0x3d0/0x3d0 [ 64.338269][ T7931] ? __lock_acquire+0x4750/0x4750 [ 64.343290][ T7931] ? __up_read+0x5b0/0x5b0 [ 64.347700][ T7931] ? vmacache_find+0x50f/0x5b0 [ 64.352462][ T7931] ? vmacache_update+0xb7/0x120 [ 64.357300][ T7931] ? check_preemption_disabled+0xb7/0x2a0 [ 64.363406][ T7931] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 64.369013][ T7931] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 64.374848][ T7931] ? do_syscall_64+0x1d/0x140 [ 64.379569][ T7931] __x64_sys_bpf+0x7a/0x90 [ 64.384016][ T7931] do_syscall_64+0xfe/0x140 [ 64.388583][ T7931] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.394477][ T7931] RIP: 0033:0x440369 [ 64.398363][ T7931] 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 [ 64.418351][ T7931] RSP: 002b:00007ffced5149e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 64.426874][ T7931] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440369 [ 64.435201][ T7931] RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 [ 64.443637][ T7931] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 64.451703][ T7931] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401bf0 [ 64.459679][ T7931] R13: 0000000000401c80 R14: 0000000000000000 R15: 0000000000000000 [ 64.469332][ T7931] Kernel Offset: disabled [ 64.473980][ T7931] Rebooting in 86400 seconds..