[ 62.347216][ T24] audit: type=1800 audit(1563324706.301:24): pid=9242 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.167080][ T24] audit: type=1800 audit(1563324707.201:25): pid=9242 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.201347][ T24] audit: type=1800 audit(1563324707.201:26): pid=9242 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.953925][ T9394] ------------[ cut here ]------------ [ 70.959471][ T9394] verifier backtracking bug [ 70.959583][ T9394] WARNING: CPU: 0 PID: 9394 at kernel/bpf/verifier.c:1785 __mark_chain_precision+0x19bb/0x1ee0 [ 70.974473][ T9394] Kernel panic - not syncing: panic_on_warn set ... [ 70.981056][ T9394] CPU: 0 PID: 9394 Comm: syz-executor148 Not tainted 5.2.0+ #65 [ 70.988669][ T9394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.998712][ T9394] Call Trace: [ 71.001991][ T9394] dump_stack+0x172/0x1f0 [ 71.006311][ T9394] ? __mark_chain_precision+0x1900/0x1ee0 [ 71.012017][ T9394] panic+0x2dc/0x755 [ 71.015913][ T9394] ? add_taint.cold+0x16/0x16 [ 71.020582][ T9394] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.026809][ T9394] ? __warn.cold+0x5/0x4c [ 71.031117][ T9394] ? __warn+0xe7/0x1e0 [ 71.035163][ T9394] ? __mark_chain_precision+0x19bb/0x1ee0 [ 71.048042][ T9394] __warn.cold+0x20/0x4c [ 71.052267][ T9394] ? vprintk_emit+0x1ea/0x700 [ 71.056931][ T9394] ? __mark_chain_precision+0x19bb/0x1ee0 [ 71.062652][ T9394] report_bug+0x263/0x2b0 [ 71.067058][ T9394] do_error_trap+0x11b/0x200 [ 71.071644][ T9394] do_invalid_op+0x37/0x50 [ 71.076044][ T9394] ? __mark_chain_precision+0x19bb/0x1ee0 [ 71.081741][ T9394] invalid_op+0x14/0x20 [ 71.085881][ T9394] RIP: 0010:__mark_chain_precision+0x19bb/0x1ee0 [ 71.092185][ T9394] Code: 08 31 ff 89 de e8 d5 b2 f2 ff 84 db 0f 85 ce fe ff ff e8 88 b1 f2 ff 48 c7 c7 c0 79 91 87 c6 05 f9 a7 1f 08 01 e8 ad 5a c4 ff <0f> 0b 41 bc f2 ff ff ff e9 af fe ff ff e8 23 9a 2c 00 e9 c2 e7 ff [ 71.111776][ T9394] RSP: 0018:ffff888093e97380 EFLAGS: 00010286 [ 71.117829][ T9394] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 71.125799][ T9394] RDX: 0000000000000000 RSI: ffffffff815c10d6 RDI: ffffed10127d2e62 [ 71.133751][ T9394] RBP: ffff888093e974d0 R08: ffff88809896c5c0 R09: 0000000000000000 [ 71.141704][ T9394] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 71.149749][ T9394] R13: ffff8880a0118140 R14: 0000000000000001 R15: ffff8880933bda00 [ 71.157823][ T9394] ? vprintk_func+0x86/0x189 [ 71.162481][ T9394] ? print_verifier_state+0x11b0/0x11b0 [ 71.168013][ T9394] ? __x64_sys_bpf+0x73/0xb0 [ 71.172581][ T9394] ? bpf_verifier_log_write+0x240/0x240 [ 71.178111][ T9394] ? check_reg_arg+0x1f1/0x480 [ 71.182852][ T9394] ? apparmor_capable+0x2ed/0x630 [ 71.187857][ T9394] check_cond_jmp_op+0xcd8/0x3c30 [ 71.192860][ T9394] ? find_held_lock+0x35/0x130 [ 71.197608][ T9394] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 71.203239][ T9394] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.209474][ T9394] ? check_func_arg+0x11c0/0x11c0 [ 71.214487][ T9394] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.220719][ T9394] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.226945][ T9394] ? krealloc+0x7b/0xd0 [ 71.231082][ T9394] ? krealloc+0x7b/0xd0 [ 71.235220][ T9394] ? rcu_read_lock_sched_held+0x110/0x130 [ 71.240928][ T9394] ? kfree+0x28b/0x2c0 [ 71.244996][ T9394] ? krealloc+0x7b/0xd0 [ 71.249135][ T9394] ? push_jmp_history.isra.0+0x1a9/0x260 [ 71.254746][ T9394] do_check+0x6389/0x8a50 [ 71.259067][ T9394] ? find_held_lock+0x35/0x130 [ 71.263839][ T9394] ? check_helper_call+0x3210/0x3210 [ 71.269325][ T9394] ? kfree+0x226/0x2c0 [ 71.273372][ T9394] ? kvfree+0x61/0x70 [ 71.277332][ T9394] ? kfree+0x226/0x2c0 [ 71.281385][ T9394] ? lockdep_hardirqs_on+0x418/0x5d0 [ 71.286676][ T9394] ? trace_hardirqs_on+0x67/0x240 [ 71.291707][ T9394] ? kvfree+0x61/0x70 [ 71.295689][ T9394] bpf_check+0x6f99/0x9950 [ 71.300128][ T9394] ? do_check+0x8a50/0x8a50 [ 71.304637][ T9394] ? lock_downgrade+0x920/0x920 [ 71.309495][ T9394] ? ktime_get_with_offset+0x13a/0x360 [ 71.314944][ T9394] ? bpf_prog_load+0xdce/0x1670 [ 71.319816][ T9394] ? ktime_get_with_offset+0x13a/0x360 [ 71.325276][ T9394] ? lockdep_hardirqs_on+0x418/0x5d0 [ 71.330559][ T9394] ? trace_hardirqs_on+0x67/0x240 [ 71.335588][ T9394] ? memset+0x32/0x40 [ 71.339639][ T9394] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 71.345870][ T9394] ? bpf_obj_name_cpy+0x13f/0x190 [ 71.350885][ T9394] bpf_prog_load+0xe68/0x1670 [ 71.355652][ T9394] ? bpf_prog_new_fd+0x60/0x60 [ 71.360415][ T9394] ? lock_downgrade+0x920/0x920 [ 71.365259][ T9394] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 71.371493][ T9394] ? security_bpf+0x8b/0xc0 [ 71.375989][ T9394] __do_sys_bpf+0xa46/0x42f0 [ 71.380586][ T9394] ? bpf_prog_load+0x1670/0x1670 [ 71.385528][ T9394] ? lock_downgrade+0x920/0x920 [ 71.390411][ T9394] ? __kasan_check_write+0x14/0x20 [ 71.395565][ T9394] ? up_read+0x159/0x570 [ 71.399835][ T9394] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 71.405311][ T9394] ? do_syscall_64+0x26/0x6a0 [ 71.409981][ T9394] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.416043][ T9394] ? do_syscall_64+0x26/0x6a0 [ 71.420719][ T9394] __x64_sys_bpf+0x73/0xb0 [ 71.425125][ T9394] do_syscall_64+0xfd/0x6a0 [ 71.429636][ T9394] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.435536][ T9394] RIP: 0033:0x440369 [ 71.439433][ T9394] 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 [ 71.459032][ T9394] RSP: 002b:00007fffdf6d2fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 71.467457][ T9394] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440369 [ 71.475461][ T9394] RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 [ 71.483430][ T9394] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 71.491416][ T9394] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401bf0 [ 71.499500][ T9394] R13: 0000000000401c80 R14: 0000000000000000 R15: 0000000000000000 [ 71.508559][ T9394] Kernel Offset: disabled [ 71.512935][ T9394] Rebooting in 86400 seconds..