[ 68.620069][ T26] audit: type=1800 audit(1565285496.834:27): pid=10172 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 68.660134][ T26] audit: type=1800 audit(1565285496.844:28): pid=10172 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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. [ 69.261516][ T26] audit: type=1800 audit(1565285497.554:29): pid=10172 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 [ 69.282376][ T26] audit: type=1800 audit(1565285497.564:30): pid=10172 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 '10.128.0.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 87.737199][T10329] ------------[ cut here ]------------ [ 87.742846][T10329] verifier backtracking bug [ 87.742930][T10329] WARNING: CPU: 1 PID: 10329 at kernel/bpf/verifier.c:1782 __mark_chain_precision+0x197a/0x1ea0 [ 87.758857][T10329] Kernel panic - not syncing: panic_on_warn set ... [ 87.765595][T10329] CPU: 1 PID: 10329 Comm: syz-executor520 Not tainted 5.3.0-rc3+ #122 [ 87.774024][T10329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.784750][T10329] Call Trace: [ 87.789091][T10329] dump_stack+0x172/0x1f0 [ 87.793613][T10329] ? __mark_chain_precision+0x18c0/0x1ea0 [ 87.799577][T10329] panic+0x2dc/0x755 [ 87.803963][T10329] ? add_taint.cold+0x16/0x16 [ 87.808813][T10329] ? __kasan_check_write+0x14/0x20 [ 87.814192][T10329] ? __warn.cold+0x5/0x4c [ 87.818529][T10329] ? __warn+0xe7/0x1e0 [ 87.822934][T10329] ? __mark_chain_precision+0x197a/0x1ea0 [ 87.828657][T10329] __warn.cold+0x20/0x4c [ 87.833096][T10329] ? __mark_chain_precision+0x197a/0x1ea0 [ 87.838963][T10329] report_bug+0x263/0x2b0 [ 87.843291][T10329] do_error_trap+0x11b/0x200 [ 87.848058][T10329] do_invalid_op+0x37/0x50 [ 87.852472][T10329] ? __mark_chain_precision+0x197a/0x1ea0 [ 87.858218][T10329] invalid_op+0x23/0x30 [ 87.862457][T10329] RIP: 0010:__mark_chain_precision+0x197a/0x1ea0 [ 87.869307][T10329] Code: 08 31 ff 89 de e8 26 a0 f2 ff 84 db 0f 85 07 ff ff ff e8 d9 9e f2 ff 48 c7 c7 a0 a7 91 87 c6 05 36 b8 21 08 01 e8 9e 11 c4 ff <0f> 0b 41 bc f2 ff ff ff e9 e8 fe ff ff 48 8b bd d8 fe ff ff e8 fd [ 87.889424][T10329] RSP: 0018:ffff88808d9675d8 EFLAGS: 00010286 [ 87.896088][T10329] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 87.904648][T10329] RDX: 0000000000000000 RSI: ffffffff815c3ba6 RDI: ffffed1011b2cead [ 87.913300][T10329] RBP: ffff88808d967728 R08: ffff888090920640 R09: fffffbfff11b42c5 [ 87.921770][T10329] R10: fffffbfff11b42c4 R11: ffffffff88da1623 R12: 0000000000000001 [ 87.929897][T10329] R13: ffff8880885eeec0 R14: ffff88808ca3d680 R15: ffff88808d9676c0 [ 87.938008][T10329] ? vprintk_func+0x86/0x189 [ 87.943069][T10329] ? __mark_chain_precision+0x197a/0x1ea0 [ 87.949500][T10329] ? print_verifier_state+0x11b0/0x11b0 [ 87.955478][T10329] ? bpf_verifier_log_write+0x240/0x240 [ 87.961448][T10329] ? krealloc+0xa6/0xd0 [ 87.966054][T10329] ? push_jmp_history.isra.0+0x1a9/0x260 [ 87.972211][T10329] do_check+0x36d6/0x89f0 [ 87.977079][T10329] ? check_helper_call+0x3210/0x3210 [ 87.982540][T10329] ? quarantine_put+0x11c/0x1c0 [ 87.987393][T10329] ? trace_hardirqs_on+0x67/0x240 [ 87.993290][T10329] ? kvfree+0x61/0x70 [ 87.997408][T10329] bpf_check+0x6f99/0x9948 [ 88.002133][T10329] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 88.008712][T10329] ? do_check+0x89f0/0x89f0 [ 88.013867][T10329] ? lock_downgrade+0x920/0x920 [ 88.019251][T10329] ? lock_acquire+0x190/0x410 [ 88.024486][T10329] ? bpf_prog_load+0xdce/0x1670 [ 88.030012][T10329] ? trace_hardirqs_on+0x67/0x240 [ 88.035683][T10329] ? memset+0x32/0x40 [ 88.039882][T10329] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 88.046331][T10329] ? bpf_obj_name_cpy+0x13f/0x190 [ 88.051506][T10329] bpf_prog_load+0xe68/0x1670 [ 88.056317][T10329] ? bpf_prog_new_fd+0x60/0x60 [ 88.061376][T10329] ? trace_hardirqs_on+0x67/0x240 [ 88.066919][T10329] ? lock_downgrade+0x920/0x920 [ 88.072048][T10329] ? __might_fault+0xfb/0x1e0 [ 88.076917][T10329] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 88.083761][T10329] ? security_bpf+0x8b/0xc0 [ 88.088386][T10329] __do_sys_bpf+0xc43/0x3460 [ 88.093238][T10329] ? __kasan_check_read+0x11/0x20 [ 88.098417][T10329] ? bpf_prog_load+0x1670/0x1670 [ 88.104041][T10329] ? lock_downgrade+0x920/0x920 [ 88.109283][T10329] ? __kasan_check_write+0x14/0x20 [ 88.114477][T10329] ? up_read+0x159/0x570 [ 88.118732][T10329] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.125166][T10329] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 88.131525][T10329] __x64_sys_bpf+0x73/0xb0 [ 88.136426][T10329] do_syscall_64+0xfd/0x6a0 [ 88.145330][T10329] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 88.151926][T10329] RIP: 0033:0x4402b9 [ 88.157067][T10329] 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 [ 88.177305][T10329] RSP: 002b:00007ffd6a46e8a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 88.186153][T10329] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 88.194642][T10329] RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 [ 88.203006][T10329] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 88.211136][T10329] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401b40 [ 88.219605][T10329] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 88.229070][T10329] Kernel Offset: disabled [ 88.233593][T10329] Rebooting in 86400 seconds..