[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.074431][ T26] audit: type=1800 audit(1560625737.200:25): pid=8214 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 52.120703][ T26] audit: type=1800 audit(1560625737.200:26): pid=8214 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 52.156656][ T26] audit: type=1800 audit(1560625737.210:27): pid=8214 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 '10.128.1.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 64.327330][ T8369] WARNING: CPU: 1 PID: 8369 at arch/x86/kernel/perf_regs.c:71 perf_reg_value+0xdb/0x110 [ 64.337305][ T8369] Kernel panic - not syncing: panic_on_warn set ... [ 64.343897][ T8369] CPU: 1 PID: 8369 Comm: syz-executor747 Not tainted 5.2.0-rc4-next-20190614 #15 [ 64.352981][ T8369] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.363139][ T8369] Call Trace: [ 64.367270][ T8369] dump_stack+0x172/0x1f0 [ 64.371593][ T8369] ? perf_reg_value+0x40/0x110 [ 64.376338][ T8369] panic+0x2cb/0x744 [ 64.380230][ T8369] ? __warn_printk+0xf3/0xf3 [ 64.384802][ T8369] ? perf_reg_value+0xdb/0x110 [ 64.389545][ T8369] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.395765][ T8369] ? __warn.cold+0x5/0x4d [ 64.400106][ T8369] ? __warn+0xe8/0x1d0 [ 64.404259][ T8369] ? perf_reg_value+0xdb/0x110 [ 64.409031][ T8369] __warn.cold+0x20/0x4d [ 64.413262][ T8369] ? perf_reg_value+0xdb/0x110 [ 64.418012][ T8369] report_bug+0x263/0x2b0 [ 64.422328][ T8369] do_error_trap+0x11b/0x200 [ 64.426917][ T8369] do_invalid_op+0x37/0x50 [ 64.431320][ T8369] ? perf_reg_value+0xdb/0x110 [ 64.436072][ T8369] invalid_op+0x14/0x20 [ 64.440207][ T8369] RIP: 0010:perf_reg_value+0xdb/0x110 [ 64.445690][ T8369] 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 c2 5b 79 00 8b 75 f0 [ 64.465290][ T8369] RSP: 0018:ffff8880957af2b8 EFLAGS: 00010202 [ 64.471440][ T8369] RAX: 00000000fffffff9 RBX: ffff8880957afa68 RCX: ffffffff8185eade [ 64.480440][ T8369] RDX: 0000000000000000 RSI: 0000000000000019 RDI: ffff8880957afa68 [ 64.488481][ T8369] RBP: ffff8880957af2c8 R08: ffff888090a1c240 R09: ffffed1011f5acf7 [ 64.496440][ T8369] R10: ffffed1011f5acf6 R11: ffff88808fad67b7 R12: ffff8880957af320 [ 64.504510][ T8369] R13: ffff8880957af508 R14: ffff8880957afa68 R15: ffff8880957af700 [ 64.512643][ T8369] ? perf_output_sample_regs+0xae/0x160 [ 64.518262][ T8369] perf_output_sample_regs+0xca/0x160 [ 64.523628][ T8369] ? rb_free_rcu+0x20/0x20 [ 64.528024][ T8369] ? memcpy+0x46/0x50 [ 64.532003][ T8369] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 64.537709][ T8369] perf_output_sample+0x15c2/0x1a90 [ 64.543115][ T8369] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 64.549351][ T8369] ? perf_prepare_sample+0x829/0x1520 [ 64.554961][ T8369] ? perf_event__output_id_sample+0x90/0x90 [ 64.561385][ T8369] ? perf_event_output_forward+0x125/0x290 [ 64.567357][ T8369] perf_event_output_forward+0x150/0x290 [ 64.572994][ T8369] ? perf_prepare_sample+0x1520/0x1520 [ 64.578436][ T8369] ? __this_cpu_preempt_check+0x3a/0x2a0 [ 64.584085][ T8369] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 64.590318][ T8369] ? __perf_event_account_interrupt+0x100/0x2e0 [ 64.596542][ T8369] __perf_event_overflow+0x141/0x370 [ 64.601816][ T8369] ? perf_swevent_overflow+0x28/0x140 [ 64.607198][ T8369] perf_swevent_overflow+0xaa/0x140 [ 64.612383][ T8369] perf_swevent_event+0x1f7/0x2f0 [ 64.617597][ T8369] ___perf_sw_event+0x31c/0x570 [ 64.622689][ T8369] ? __handle_mm_fault+0x21b2/0x3eb0 [ 64.628064][ T8369] ? find_held_lock+0x35/0x130 [ 64.632845][ T8369] ? perf_pending_event+0x190/0x190 [ 64.638064][ T8369] ? copy_user_enhanced_fast_string+0xe/0x20 [ 64.644038][ T8369] ? migration_entry_to_page+0x320/0x320 [ 64.649672][ T8369] ? kasan_check_read+0x11/0x20 [ 64.654755][ T8369] ? do_raw_spin_unlock+0x57/0x270 [ 64.659858][ T8369] ? _raw_spin_unlock+0x2d/0x50 [ 64.664702][ T8369] ? __handle_mm_fault+0x7cb/0x3eb0 [ 64.669882][ T8369] ? __do_page_fault+0x623/0xda0 [ 64.674819][ T8369] ? find_held_lock+0x35/0x130 [ 64.679580][ T8369] ? __do_page_fault+0x623/0xda0 [ 64.684516][ T8369] ? lock_downgrade+0x920/0x920 [ 64.689346][ T8369] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.695569][ T8369] __perf_sw_event+0x51/0xa0 [ 64.700167][ T8369] ? perf_swevent_get_recursion_context+0x120/0x170 [ 64.706735][ T8369] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.714217][ T8369] ? __perf_sw_event+0x51/0xa0 [ 64.718967][ T8369] __do_page_fault+0x747/0xda0 [ 64.723721][ T8369] do_page_fault+0x71/0x57d [ 64.728323][ T8369] page_fault+0x1e/0x30 [ 64.732464][ T8369] RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 [ 64.739050][ T8369] 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 [ 64.758877][ T8369] RSP: 0018:ffff8880957afb10 EFLAGS: 00010206 [ 64.764928][ T8369] RAX: 0000000000000000 RBX: 0000000000001000 RCX: 00000000000001c0 [ 64.772884][ T8369] RDX: 0000000000001000 RSI: 0000000020001000 RDI: ffff8880a17ace40 [ 64.780864][ T8369] RBP: ffff8880957afb48 R08: ffffed10142f5a00 R09: 0000000000000000 [ 64.788818][ T8369] R10: ffffed10142f59ff R11: ffff8880a17acfff R12: 00000000200001c0 [ 64.796773][ T8369] R13: ffff8880a17ac000 R14: 00000000200011c0 R15: 00007ffffffff000 [ 64.804777][ T8369] ? copyin+0x12d/0x150 [ 64.808921][ T8369] copy_page_from_iter+0x3ad/0x7d0 [ 64.814106][ T8369] pipe_write+0x281/0xf30 [ 64.818422][ T8369] new_sync_write+0x4d3/0x770 [ 64.823182][ T8369] ? new_sync_read+0x800/0x800 [ 64.827957][ T8369] ? common_file_perm+0x238/0x720 [ 64.832988][ T8369] ? apparmor_file_permission+0x25/0x30 [ 64.838520][ T8369] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.844740][ T8369] ? security_file_permission+0x8f/0x380 [ 64.850526][ T8369] __vfs_write+0xe1/0x110 [ 64.854854][ T8369] vfs_write+0x268/0x5d0 [ 64.859078][ T8369] ksys_write+0x14f/0x290 [ 64.863392][ T8369] ? __ia32_sys_read+0xb0/0xb0 [ 64.868137][ T8369] __x64_sys_write+0x73/0xb0 [ 64.872704][ T8369] ? do_syscall_64+0x5b/0x680 [ 64.877369][ T8369] do_syscall_64+0xfd/0x680 [ 64.885056][ T8369] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.890960][ T8369] RIP: 0033:0x440529 [ 64.894854][ T8369] 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 [ 64.914444][ T8369] RSP: 002b:00007fff0a9380a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 64.922832][ T8369] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440529 [ 64.930985][ T8369] RDX: 000000010000026f RSI: 00000000200001c0 RDI: 0000000000000007 [ 64.938940][ T8369] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 64.947043][ T8369] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401db0 [ 64.955012][ T8369] R13: 0000000000401e40 R14: 0000000000000000 R15: 0000000000000000 [ 64.964307][ T8369] Kernel Offset: disabled [ 64.968716][ T8369] Rebooting in 86400 seconds..