[ 37.047208][ T26] audit: type=1800 audit(1555039097.472:27): pid=7604 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 37.072969][ T26] audit: type=1800 audit(1555039097.472:28): pid=7604 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. [ 37.887119][ T26] audit: type=1800 audit(1555039098.372:29): pid=7604 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 [ 37.907308][ T26] audit: type=1800 audit(1555039098.372:30): pid=7604 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 '10.128.1.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 302.261675][ T26] audit: type=1804 audit(1555039362.742:31): pid=7755 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor800" name="/root/bus" dev="sda1" ino=16461 res=1 [ 302.295371][ C0] hrtimer: interrupt took 97365 ns [ 416.580476][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 416.587242][ C0] rcu: 0-....: (11429 ticks this GP) idle=11e/1/0x4000000000000002 softirq=10841/10843 fqs=5244 [ 416.597975][ C0] rcu: (t=10500 jiffies g=5017 q=10) [ 416.603534][ C0] NMI backtrace for cpu 0 [ 416.607849][ C0] CPU: 0 PID: 7755 Comm: syz-executor800 Not tainted 5.1.0-rc4+ #63 [ 416.615839][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 416.625878][ C0] Call Trace: [ 416.629149][ C0] [ 416.632002][ C0] dump_stack+0x172/0x1f0 [ 416.636326][ C0] nmi_cpu_backtrace.cold+0x63/0xa4 [ 416.641552][ C0] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 416.647178][ C0] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 416.653222][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 416.659264][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 416.664371][ C0] ? find_next_bit+0x107/0x130 [ 416.669127][ C0] rcu_sched_clock_irq.cold+0x500/0xa4a [ 416.674657][ C0] ? raise_softirq+0x11f/0x310 [ 416.679414][ C0] update_process_times+0x32/0x80 [ 416.684526][ C0] tick_sched_handle+0xa2/0x190 [ 416.689376][ C0] tick_sched_timer+0x47/0x130 [ 416.694144][ C0] __hrtimer_run_queues+0x33e/0xde0 [ 416.699332][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 416.704605][ C0] ? hrtimer_start_range_ns+0xc80/0xc80 [ 416.710204][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 416.715913][ C0] ? ktime_get_update_offsets_now+0x2d9/0x440 [ 416.722427][ C0] hrtimer_interrupt+0x314/0x770 [ 416.727359][ C0] smp_apic_timer_interrupt+0x120/0x570 [ 416.732950][ C0] apic_timer_interrupt+0xf/0x20 [ 416.737871][ C0] [ 416.740798][ C0] RIP: 0010:map_id_up+0x89/0x320 [ 416.745774][ C0] Code: f1 f1 f1 c7 40 04 00 04 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 33 98 03 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 <84> c0 74 08 3c 03 0f 8e 35 02 00 00 4c 8b bd 68 ff ff ff 45 8b 37 [ 416.765631][ C0] RSP: 0018:ffff888084e3ef90 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 [ 416.774025][ C0] RAX: 0000000000000000 RBX: ffff888084e3f008 RCX: ffffffff81f27ea9 [ 416.782267][ C0] RDX: 0000000000000000 RSI: ffffffff816cf6cd RDI: ffffffff88970fc0 [ 416.790235][ C0] RBP: ffff888084e3f030 R08: ffff8880a4164500 R09: ffffed10109c7e07 [ 416.798194][ C0] R10: ffffed10109c7e06 R11: 0000000000000003 R12: dffffc0000000000 [ 416.806150][ C0] R13: 0000000000000000 R14: ffffffff88970fc0 R15: ffff88809608d8f0 [ 416.814119][ C0] ? ext4_mark_iloc_dirty+0x2a9/0x2d80 [ 416.819565][ C0] ? map_id_up+0x7d/0x320 [ 416.823879][ C0] ? make_kprojid+0x30/0x30 [ 416.828364][ C0] ? ___might_sleep+0x163/0x280 [ 416.833226][ C0] ? kasan_check_write+0x14/0x20 [ 416.838143][ C0] from_kuid+0x85/0xc0 [ 416.842196][ C0] ? map_id_up+0x320/0x320 [ 416.846595][ C0] ext4_mark_iloc_dirty+0x420/0x2d80 [ 416.851872][ C0] ? ext4_chunk_trans_blocks+0x30/0x30 [ 416.857322][ C0] ? __ext4_journal_get_write_access+0x70/0xa0 [ 416.863463][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 416.869738][ C0] ext4_mark_inode_dirty+0x23c/0x940 [ 416.875020][ C0] ? ext4_dirty_inode+0x8f/0xc0 [ 416.879857][ C0] ? ext4_expand_extra_isize+0x550/0x550 [ 416.885480][ C0] ? ___might_sleep+0x163/0x280 [ 416.890321][ C0] ? __might_sleep+0x95/0x190 [ 416.894986][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 416.901224][ C0] ? ext4_journal_check_start+0x188/0x230 [ 416.906934][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 416.913217][ C0] ? __ext4_journal_start_sb+0x12d/0x4a0 [ 416.918871][ C0] ext4_dirty_inode+0x8f/0xc0 [ 416.923543][ C0] ? ext4_setattr+0x2450/0x2450 [ 416.928385][ C0] __mark_inode_dirty+0x919/0x1290 [ 416.933494][ C0] __generic_write_end+0x1b9/0x240 [ 416.938709][ C0] generic_write_end+0x6c/0x90 [ 416.943470][ C0] ext4_da_write_end+0x3c8/0xa50 [ 416.948412][ C0] generic_perform_write+0x2f0/0x530 [ 416.953696][ C0] ? page_endio+0x780/0x780 [ 416.958201][ C0] ? __generic_file_write_iter+0x1dc/0x630 [ 416.964003][ C0] __generic_file_write_iter+0x25e/0x630 [ 416.969628][ C0] ext4_file_write_iter+0x346/0x11c0 [ 416.974994][ C0] ? aa_file_perm+0x432/0xeb0 [ 416.979667][ C0] ? ext4_file_mmap+0x410/0x410 [ 416.984507][ C0] ? aa_path_link+0x460/0x460 [ 416.989259][ C0] ? splice_direct_to_actor+0x369/0x970 [ 416.994829][ C0] ? do_splice_direct+0x1da/0x2a0 [ 416.999934][ C0] ? do_sendfile+0x597/0xd00 [ 417.004608][ C0] ? __x64_sys_sendfile64+0x1dd/0x220 [ 417.009968][ C0] ? do_syscall_64+0x103/0x610 [ 417.014717][ C0] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 417.020781][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 417.026233][ C0] ? mark_held_locks+0xa4/0xf0 [ 417.030986][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 417.036470][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 417.041918][ C0] do_iter_readv_writev+0x5e1/0x8e0 [ 417.047123][ C0] ? vfs_dedupe_file_range+0x780/0x780 [ 417.052839][ C0] ? apparmor_file_permission+0x25/0x30 [ 417.058394][ C0] ? rw_verify_area+0x118/0x360 [ 417.063228][ C0] do_iter_write+0x184/0x610 [ 417.067801][ C0] ? rcu_read_lock_sched_held+0x110/0x130 [ 417.073507][ C0] ? __kmalloc+0x5d5/0x740 [ 417.077954][ C0] vfs_iter_write+0x77/0xb0 [ 417.082536][ C0] iter_file_splice_write+0x662/0xbe0 [ 417.087917][ C0] ? atime_needs_update+0x5f0/0x5f0 [ 417.093110][ C0] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 417.099132][ C0] ? rw_verify_area+0x118/0x360 [ 417.103970][ C0] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 417.109935][ C0] direct_splice_actor+0x126/0x1a0 [ 417.115036][ C0] splice_direct_to_actor+0x369/0x970 [ 417.120400][ C0] ? generic_pipe_buf_nosteal+0x10/0x10 [ 417.125934][ C0] ? do_splice_to+0x190/0x190 [ 417.130602][ C0] ? rw_verify_area+0x118/0x360 [ 417.135434][ C0] do_splice_direct+0x1da/0x2a0 [ 417.140294][ C0] ? splice_direct_to_actor+0x970/0x970 [ 417.145818][ C0] ? rcu_read_lock_sched_held+0x110/0x130 [ 417.151523][ C0] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 417.157022][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 417.163249][ C0] ? __sb_start_write+0x1ac/0x360 [ 417.168819][ C0] do_sendfile+0x597/0xd00 [ 417.173324][ C0] ? do_compat_pwritev64+0x1c0/0x1c0 [ 417.178590][ C0] ? do_sys_open+0x31d/0x5d0 [ 417.183236][ C0] __x64_sys_sendfile64+0x1dd/0x220 [ 417.188425][ C0] ? __ia32_sys_sendfile+0x230/0x230 [ 417.193693][ C0] ? do_syscall_64+0x26/0x610 [ 417.198552][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 417.203824][ C0] ? trace_hardirqs_on+0x67/0x230 [ 417.208939][ C0] do_syscall_64+0x103/0x610 [ 417.213672][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 417.227278][ C0] RIP: 0033:0x440339 [ 417.231156][ C0] 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 [ 417.250747][ C0] RSP: 002b:00007ffc4eddfd68 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 417.259143][ C0] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440339 [ 417.267208][ C0] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000003 [ 417.275390][ C0] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 417.283346][ C0] R10: 00008000fffffffe R11: 0000000000000246 R12: 0000000000401bc0 [ 417.291301][ C0] R13: 0000000000401c50 R14: 0000000000000000 R15: 0000000000000000