[ 79.270899][ T26] audit: type=1800 audit(1565283624.388:27): pid=10311 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 79.309301][ T26] audit: type=1800 audit(1565283624.398:28): pid=10311 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. [ 79.828430][ T26] audit: type=1800 audit(1565283625.008:29): pid=10311 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 [ 79.854208][ T26] audit: type=1800 audit(1565283625.008:30): pid=10311 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 '10.128.10.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 101.445995][T10462] ------------[ cut here ]------------ [ 101.451551][T10462] verifier backtracking bug [ 101.451709][T10462] WARNING: CPU: 0 PID: 10462 at kernel/bpf/verifier.c:1782 __mark_chain_precision+0x197a/0x1ea0 [ 101.466790][T10462] Kernel panic - not syncing: panic_on_warn set ... [ 101.474121][T10462] CPU: 0 PID: 10462 Comm: syz-executor970 Not tainted 5.3.0-rc3-next-20190808 #62 [ 101.483559][T10462] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.493607][T10462] Call Trace: [ 101.496927][T10462] dump_stack+0x172/0x1f0 [ 101.501267][T10462] ? __mark_chain_precision+0x1970/0x1ea0 [ 101.507004][T10462] panic+0x2dc/0x755 [ 101.511107][T10462] ? add_taint.cold+0x16/0x16 [ 101.515913][T10462] ? __kasan_check_write+0x14/0x20 [ 101.521098][T10462] ? __warn.cold+0x5/0x4c [ 101.525520][T10462] ? __warn+0xe7/0x1e0 [ 101.529588][T10462] ? __mark_chain_precision+0x197a/0x1ea0 [ 101.535358][T10462] __warn.cold+0x20/0x4c [ 101.539602][T10462] ? __mark_chain_precision+0x197a/0x1ea0 [ 101.545320][T10462] report_bug+0x263/0x2b0 [ 101.549683][T10462] do_error_trap+0x11b/0x200 [ 101.554348][T10462] do_invalid_op+0x37/0x50 [ 101.558754][T10462] ? __mark_chain_precision+0x197a/0x1ea0 [ 101.564470][T10462] invalid_op+0x23/0x30 [ 101.568653][T10462] RIP: 0010:__mark_chain_precision+0x197a/0x1ea0 [ 101.574997][T10462] Code: 08 31 ff 89 de e8 a6 99 f2 ff 84 db 0f 85 07 ff ff ff e8 59 98 f2 ff 48 c7 c7 80 ba b1 87 c6 05 b7 d0 42 08 01 e8 6e c6 c3 ff <0f> 0b 41 bc f2 ff ff ff e9 e8 fe ff ff 48 8b bd d8 fe ff ff e8 2d [ 101.595666][T10462] RSP: 0018:ffff88809301f5d8 EFLAGS: 00010286 [ 101.601722][T10462] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 101.609957][T10462] RDX: 0000000000000000 RSI: ffffffff815bb7e6 RDI: ffffed1012603ead [ 101.617923][T10462] RBP: ffff88809301f728 R08: ffff88808e538240 R09: fffffbfff11f40e1 [ 101.625901][T10462] R10: fffffbfff11f40e0 R11: ffffffff88fa0703 R12: 0000000000000001 [ 101.634122][T10462] R13: ffff8880a453e5c0 R14: ffff88809a005e80 R15: ffff88809301f6c0 [ 101.644149][T10462] ? vprintk_func+0x86/0x189 [ 101.649059][T10462] ? __mark_chain_precision+0x197a/0x1ea0 [ 101.654951][T10462] ? print_verifier_state+0x11b0/0x11b0 [ 101.660494][T10462] ? bpf_verifier_log_write+0x240/0x240 [ 101.666139][T10462] ? krealloc+0xa6/0xd0 [ 101.670342][T10462] ? push_jmp_history.isra.0+0x1a9/0x260 [ 101.675963][T10462] do_check+0x36d6/0x89f0 [ 101.680363][T10462] ? check_helper_call+0x32f0/0x32f0 [ 101.685860][T10462] ? quarantine_put+0x11c/0x1c0 [ 101.690726][T10462] ? trace_hardirqs_on+0x67/0x240 [ 101.695987][T10462] ? kvfree+0x61/0x70 [ 101.699966][T10462] bpf_check+0x6f99/0x9948 [ 101.704374][T10462] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 101.710175][T10462] ? do_check+0x89f0/0x89f0 [ 101.714790][T10462] ? lock_downgrade+0x920/0x920 [ 101.719769][T10462] ? lock_acquire+0x190/0x410 [ 101.724797][T10462] ? bpf_prog_load+0xdce/0x1670 [ 101.729644][T10462] ? trace_hardirqs_on+0x67/0x240 [ 101.734654][T10462] ? memset+0x32/0x40 [ 101.738746][T10462] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 101.744977][T10462] ? bpf_obj_name_cpy+0x13f/0x190 [ 101.750083][T10462] bpf_prog_load+0xe68/0x1670 [ 101.754974][T10462] ? bpf_prog_new_fd+0x60/0x60 [ 101.760258][T10462] ? trace_hardirqs_on+0x67/0x240 [ 101.765408][T10462] ? lock_downgrade+0x920/0x920 [ 101.770281][T10462] ? __might_fault+0xfb/0x1e0 [ 101.774956][T10462] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 101.781231][T10462] ? security_bpf+0x8b/0xc0 [ 101.787459][T10462] __do_sys_bpf+0xc43/0x3460 [ 101.792175][T10462] ? bpf_prog_load+0x1670/0x1670 [ 101.797683][T10462] ? lock_downgrade+0x920/0x920 [ 101.802714][T10462] ? __kasan_check_write+0x14/0x20 [ 101.807867][T10462] ? up_read+0x1d2/0x810 [ 101.812141][T10462] ? trace_hardirqs_on+0x67/0x240 [ 101.817349][T10462] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.823586][T10462] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 101.829951][T10462] __x64_sys_bpf+0x73/0xb0 [ 101.834407][T10462] do_syscall_64+0xfa/0x760 [ 101.839195][T10462] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.845345][T10462] RIP: 0033:0x4402b9 [ 101.849367][T10462] 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 [ 101.870060][T10462] RSP: 002b:00007ffe19c87fd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 101.878556][T10462] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 101.886694][T10462] RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 [ 101.894913][T10462] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 101.903063][T10462] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401b40 [ 101.911422][T10462] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 101.921233][T10462] Kernel Offset: disabled [ 101.925934][T10462] Rebooting in 86400 seconds..