[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 51.553116][ T26] audit: type=1800 audit(1560670404.545:25): pid=8181 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 51.597095][ T26] audit: type=1800 audit(1560670404.555:26): pid=8181 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 51.630265][ T26] audit: type=1800 audit(1560670404.555:27): pid=8181 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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 '10.128.0.117' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 61.732899][ T8334] WARNING: CPU: 0 PID: 8334 at arch/x86/kernel/perf_regs.c:71 perf_reg_value+0xdb/0x110 [ 61.742720][ T8334] Kernel panic - not syncing: panic_on_warn set ... [ 61.749291][ T8334] CPU: 0 PID: 8334 Comm: syz-executor968 Not tainted 5.2.0-rc4+ #33 [ 61.757239][ T8334] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.767271][ T8334] Call Trace: [ 61.770543][ T8334] dump_stack+0x172/0x1f0 [ 61.774867][ T8334] ? perf_reg_value+0x20/0x110 [ 61.779607][ T8334] panic+0x2cb/0x744 [ 61.783482][ T8334] ? __warn_printk+0xf3/0xf3 [ 61.788069][ T8334] ? perf_reg_value+0xdb/0x110 [ 61.792830][ T8334] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.799048][ T8334] ? __warn.cold+0x5/0x4d [ 61.803351][ T8334] ? __warn+0xe8/0x1d0 [ 61.807398][ T8334] ? perf_reg_value+0xdb/0x110 [ 61.812136][ T8334] __warn.cold+0x20/0x4d [ 61.816352][ T8334] ? perf_reg_value+0xdb/0x110 [ 61.821098][ T8334] report_bug+0x263/0x2b0 [ 61.825425][ T8334] do_error_trap+0x11b/0x200 [ 61.830001][ T8334] do_invalid_op+0x37/0x50 [ 61.834393][ T8334] ? perf_reg_value+0xdb/0x110 [ 61.839136][ T8334] invalid_op+0x14/0x20 [ 61.843269][ T8334] RIP: 0010:perf_reg_value+0xdb/0x110 [ 61.848617][ T8334] Code: a0 00 00 00 77 26 48 b8 00 00 00 00 00 fc ff df 48 01 fb 48 89 da 48 c1 ea 03 80 3c 02 00 75 34 48 8b 03 48 83 c4 08 5b 5d c3 <0f> 0b 48 83 c4 08 31 c0 5b 5d c3 89 75 f0 e8 02 d7 78 00 8b 75 f0 [ 61.868198][ T8334] RSP: 0018:ffff8880a3c372b8 EFLAGS: 00010202 [ 61.874241][ T8334] RAX: 00000000fffffff9 RBX: ffff8880a3c37a68 RCX: ffffffff81855ade [ 61.882189][ T8334] RDX: 0000000000000000 RSI: 0000000000000019 RDI: ffff8880a3c37a68 [ 61.890142][ T8334] RBP: ffff8880a3c372c8 R08: ffff88808f07a6c0 R09: ffffed1012886902 [ 61.898113][ T8334] R10: ffffed1012886901 R11: ffff88809443480f R12: ffff8880a3c37320 [ 61.906063][ T8334] R13: ffff8880a3c37508 R14: ffff8880a3c37a68 R15: ffff8880a3c37700 [ 61.914034][ T8334] ? perf_output_sample_regs+0xae/0x160 [ 61.919557][ T8334] perf_output_sample_regs+0xca/0x160 [ 61.924908][ T8334] ? rb_free_rcu+0x20/0x20 [ 61.929302][ T8334] ? memcpy+0x46/0x50 [ 61.933262][ T8334] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 61.938960][ T8334] perf_output_sample+0x15c2/0x1a90 [ 61.944135][ T8334] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 61.950348][ T8334] ? perf_prepare_sample+0x829/0x1520 [ 61.955695][ T8334] ? perf_event__output_id_sample+0x90/0x90 [ 61.961565][ T8334] ? perf_event_output_forward+0x125/0x290 [ 61.967371][ T8334] perf_event_output_forward+0x150/0x290 [ 61.972983][ T8334] ? perf_prepare_sample+0x1520/0x1520 [ 61.978423][ T8334] ? mark_held_locks+0xf0/0xf0 [ 61.983167][ T8334] ? __this_cpu_preempt_check+0x3a/0x270 [ 61.988778][ T8334] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 61.995100][ T8334] ? __perf_event_account_interrupt+0x100/0x2e0 [ 62.001316][ T8334] __perf_event_overflow+0x141/0x370 [ 62.006594][ T8334] perf_swevent_overflow+0xaa/0x140 [ 62.011771][ T8334] perf_swevent_event+0x1f7/0x2f0 [ 62.016771][ T8334] ___perf_sw_event+0x31c/0x570 [ 62.021614][ T8334] ? retint_kernel+0x2b/0x2b [ 62.026181][ T8334] ? __handle_mm_fault+0x21b2/0x3eb0 [ 62.031445][ T8334] ? perf_pending_event+0x190/0x190 [ 62.036620][ T8334] ? __handle_mm_fault+0x21b2/0x3eb0 [ 62.041884][ T8334] ? copy_user_enhanced_fast_string+0xe/0x20 [ 62.047840][ T8334] ? lock_downgrade+0x880/0x880 [ 62.052666][ T8334] ? migration_entry_to_page+0x320/0x320 [ 62.058275][ T8334] ? kasan_check_read+0x11/0x20 [ 62.063115][ T8334] ? do_raw_spin_unlock+0x57/0x270 [ 62.068201][ T8334] ? _raw_spin_unlock+0x2d/0x50 [ 62.073031][ T8334] ? __handle_mm_fault+0x7cb/0x3eb0 [ 62.078208][ T8334] ? __do_page_fault+0x623/0xda0 [ 62.083127][ T8334] ? find_held_lock+0x35/0x130 [ 62.087866][ T8334] ? __do_page_fault+0x623/0xda0 [ 62.092782][ T8334] ? lock_downgrade+0x880/0x880 [ 62.097612][ T8334] __perf_sw_event+0x51/0xa0 [ 62.102181][ T8334] ? perf_swevent_get_recursion_context+0x120/0x170 [ 62.108753][ T8334] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 62.114971][ T8334] ? __perf_sw_event+0x51/0xa0 [ 62.119710][ T8334] __do_page_fault+0x747/0xda0 [ 62.124465][ T8334] do_page_fault+0x71/0x57d [ 62.128960][ T8334] page_fault+0x1e/0x30 [ 62.133109][ T8334] RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 [ 62.139676][ T8334] Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4 [ 62.159343][ T8334] RSP: 0018:ffff8880a3c37b10 EFLAGS: 00010206 [ 62.165384][ T8334] RAX: 0000000000000000 RBX: 0000000000001000 RCX: 00000000000001c0 [ 62.173351][ T8334] RDX: 0000000000001000 RSI: 0000000020001000 RDI: ffff88809644de40 [ 62.181298][ T8334] RBP: ffff8880a3c37b48 R08: ffffed1012c89c00 R09: 0000000000000000 [ 62.189244][ T8334] R10: ffffed1012c89bff R11: ffff88809644dfff R12: 00000000200001c0 [ 62.197194][ T8334] R13: ffff88809644d000 R14: 00000000200011c0 R15: 00007ffffffff000 [ 62.205161][ T8334] ? copyin+0xe2/0x100 [ 62.209209][ T8334] copy_page_from_iter+0x3ad/0x7d0 [ 62.214301][ T8334] pipe_write+0x281/0xf30 [ 62.218618][ T8334] new_sync_write+0x4d3/0x770 [ 62.223268][ T8334] ? new_sync_read+0x800/0x800 [ 62.228028][ T8334] ? common_file_perm+0x238/0x720 [ 62.233028][ T8334] ? __fd_install+0x1bc/0x640 [ 62.237683][ T8334] ? apparmor_file_permission+0x25/0x30 [ 62.243204][ T8334] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 62.249420][ T8334] ? security_file_permission+0x8f/0x380 [ 62.255026][ T8334] ? lock_downgrade+0x880/0x880 [ 62.259877][ T8334] __vfs_write+0xe1/0x110 [ 62.264185][ T8334] vfs_write+0x20c/0x580 [ 62.268413][ T8334] ksys_write+0x14f/0x290 [ 62.272719][ T8334] ? __ia32_sys_read+0xb0/0xb0 [ 62.277462][ T8334] ? do_syscall_64+0x26/0x680 [ 62.284167][ T8334] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.296432][ T8334] ? do_syscall_64+0x26/0x680 [ 62.301092][ T8334] __x64_sys_write+0x73/0xb0 [ 62.305667][ T8334] do_syscall_64+0xfd/0x680 [ 62.310174][ T8334] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.316042][ T8334] RIP: 0033:0x440529 [ 62.319917][ T8334] 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 [ 62.339495][ T8334] RSP: 002b:00007ffd4be42698 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 62.347886][ T8334] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440529 [ 62.355833][ T8334] RDX: 000000010000026f RSI: 00000000200001c0 RDI: 0000000000000007 [ 62.363779][ T8334] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 62.371819][ T8334] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401db0 [ 62.379773][ T8334] R13: 0000000000401e40 R14: 0000000000000000 R15: 0000000000000000 [ 62.389098][ T8334] Kernel Offset: disabled [ 62.393475][ T8334] Rebooting in 86400 seconds..