[ 68.418946][ T27] audit: type=1800 audit(1565283444.388:27): pid=10175 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 68.440790][ T27] audit: type=1800 audit(1565283444.388:28): pid=10175 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. [ 69.034350][ T27] audit: type=1800 audit(1565283445.068:29): pid=10175 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 [ 69.054750][ T27] audit: type=1800 audit(1565283445.068:30): pid=10175 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 '10.128.0.149' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 88.622951][T10326] ------------[ cut here ]------------ [ 88.628743][T10326] verifier backtracking bug [ 88.628838][T10326] WARNING: CPU: 1 PID: 10326 at kernel/bpf/verifier.c:1782 __mark_chain_precision+0x197a/0x1ea0 [ 88.644230][T10326] Kernel panic - not syncing: panic_on_warn set ... [ 88.650808][T10326] CPU: 1 PID: 10326 Comm: syz-executor573 Not tainted 5.3.0-rc3+ #153 [ 88.660945][T10326] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 88.672207][T10326] Call Trace: [ 88.675621][T10326] dump_stack+0x172/0x1f0 [ 88.679955][T10326] ? __mark_chain_precision+0x18c0/0x1ea0 [ 88.686199][T10326] panic+0x2dc/0x755 [ 88.690085][T10326] ? add_taint.cold+0x16/0x16 [ 88.694748][T10326] ? __kasan_check_write+0x14/0x20 [ 88.699994][T10326] ? __warn.cold+0x5/0x4c [ 88.704407][T10326] ? __warn+0xe7/0x1e0 [ 88.708671][T10326] ? __mark_chain_precision+0x197a/0x1ea0 [ 88.715481][T10326] __warn.cold+0x20/0x4c [ 88.721504][T10326] ? __mark_chain_precision+0x197a/0x1ea0 [ 88.727613][T10326] report_bug+0x263/0x2b0 [ 88.731939][T10326] do_error_trap+0x11b/0x200 [ 88.736528][T10326] do_invalid_op+0x37/0x50 [ 88.741012][T10326] ? __mark_chain_precision+0x197a/0x1ea0 [ 88.746949][T10326] invalid_op+0x23/0x30 [ 88.751325][T10326] RIP: 0010:__mark_chain_precision+0x197a/0x1ea0 [ 88.757766][T10326] 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 80 a7 91 87 c6 05 2c b2 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 [ 88.778162][T10326] RSP: 0018:ffff8880a845f5d8 EFLAGS: 00010286 [ 88.784452][T10326] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 88.792556][T10326] RDX: 0000000000000000 RSI: ffffffff815c3ba6 RDI: ffffed101508bead [ 88.800765][T10326] RBP: ffff8880a845f728 R08: ffff88809ab10000 R09: fffffbfff11b42c5 [ 88.809124][T10326] R10: fffffbfff11b42c4 R11: ffffffff88da1623 R12: 0000000000000001 [ 88.817226][T10326] R13: ffff88809f272d80 R14: ffff8880a4384a80 R15: ffff8880a845f6c0 [ 88.825368][T10326] ? vprintk_func+0x86/0x189 [ 88.829966][T10326] ? __mark_chain_precision+0x197a/0x1ea0 [ 88.835687][T10326] ? print_verifier_state+0x11b0/0x11b0 [ 88.841451][T10326] ? bpf_verifier_log_write+0x240/0x240 [ 88.847127][T10326] ? krealloc+0xa6/0xd0 [ 88.851286][T10326] ? push_jmp_history.isra.0+0x1a9/0x260 [ 88.856922][T10326] do_check+0x36d6/0x89f0 [ 88.861490][T10326] ? check_helper_call+0x3210/0x3210 [ 88.866797][T10326] ? quarantine_put+0x11c/0x1c0 [ 88.871651][T10326] ? trace_hardirqs_on+0x67/0x240 [ 88.876765][T10326] ? kvfree+0x61/0x70 [ 88.880740][T10326] bpf_check+0x6f99/0x9948 [ 88.885190][T10326] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 88.890930][T10326] ? do_check+0x89f0/0x89f0 [ 88.895428][T10326] ? lock_downgrade+0x920/0x920 [ 88.900284][T10326] ? lock_acquire+0x190/0x410 [ 88.905324][T10326] ? bpf_prog_load+0xdce/0x1670 [ 88.910433][T10326] ? trace_hardirqs_on+0x67/0x240 [ 88.915544][T10326] ? memset+0x32/0x40 [ 88.920128][T10326] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 88.926866][T10326] ? bpf_obj_name_cpy+0x13f/0x190 [ 88.931993][T10326] bpf_prog_load+0xe68/0x1670 [ 88.936771][T10326] ? bpf_prog_new_fd+0x60/0x60 [ 88.941617][T10326] ? trace_hardirqs_on+0x67/0x240 [ 88.946723][T10326] ? lock_downgrade+0x920/0x920 [ 88.951566][T10326] ? __might_fault+0xfb/0x1e0 [ 88.956255][T10326] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 88.962488][T10326] ? security_bpf+0x8b/0xc0 [ 88.967128][T10326] __do_sys_bpf+0xc43/0x3460 [ 88.971933][T10326] ? __kasan_check_read+0x11/0x20 [ 88.977395][T10326] ? bpf_prog_load+0x1670/0x1670 [ 88.982340][T10326] ? lock_downgrade+0x920/0x920 [ 88.987372][T10326] ? __kasan_check_write+0x14/0x20 [ 88.992517][T10326] ? up_read+0x159/0x570 [ 88.996755][T10326] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.003036][T10326] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 89.009359][T10326] __x64_sys_bpf+0x73/0xb0 [ 89.013841][T10326] do_syscall_64+0xfd/0x6a0 [ 89.018380][T10326] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 89.024369][T10326] RIP: 0033:0x4402b9 [ 89.028252][T10326] 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 [ 89.048364][T10326] RSP: 002b:00007fff389efb08 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 89.056771][T10326] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 89.064733][T10326] RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 [ 89.072729][T10326] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 89.080694][T10326] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401b40 [ 89.089097][T10326] R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000 [ 89.098461][T10326] Kernel Offset: disabled [ 89.102788][T10326] Rebooting in 86400 seconds..