[ 31.573342] kauditd_printk_skb: 7 callbacks suppressed [ 31.573354] audit: type=1800 audit(1550821430.288:28): pid=7228 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. [ 32.410720] audit: type=1800 audit(1550821431.118:29): pid=7228 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 [ 32.431036] audit: type=1800 audit(1550821431.128:30): pid=7228 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 '10.128.0.249' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 963.532888] hrtimer: interrupt took 25959 ns [ 1120.481953] rcu: rcu_check_gp_start_stall: g4348->4352 gar:15680 ga:15694 f0x1 gs:1 rcu_preempt->state:0x0 [ 1120.492213] WARNING: CPU: 0 PID: 7398 at kernel/rcu/tree.c:2666 rcu_check_gp_start_stall.cold+0x7f/0xb1 [ 1120.501737] Kernel panic - not syncing: panic_on_warn set ... [ 1120.507618] CPU: 0 PID: 7398 Comm: syz-executor615 Not tainted 5.0.0-rc7+ #83 [ 1120.514881] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1120.524239] Call Trace: [ 1120.526812] [ 1120.528997] dump_stack+0x172/0x1f0 [ 1120.532629] ? rcu_check_callbacks.cold+0x9f9/0xa4a [ 1120.537685] panic+0x2cb/0x65c [ 1120.540879] ? __warn_printk+0xf3/0xf3 [ 1120.544773] ? rcu_check_gp_start_stall.cold+0x7f/0xb1 [ 1120.550084] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1120.555616] ? __warn.cold+0x5/0x45 [ 1120.559245] ? __warn+0xe8/0x1d0 [ 1120.562615] ? rcu_check_gp_start_stall.cold+0x7f/0xb1 [ 1120.567888] __warn.cold+0x20/0x45 [ 1120.571465] ? wake_up_klogd+0x99/0xd0 [ 1120.575356] ? rcu_check_gp_start_stall.cold+0x7f/0xb1 [ 1120.580634] report_bug+0x263/0x2b0 [ 1120.584295] do_error_trap+0x11b/0x200 [ 1120.588191] do_invalid_op+0x37/0x50 [ 1120.591902] ? rcu_check_gp_start_stall.cold+0x7f/0xb1 [ 1120.597179] invalid_op+0x14/0x20 [ 1120.600641] RIP: 0010:rcu_check_gp_start_stall.cold+0x7f/0xb1 [ 1120.606521] Code: 48 8b 0d 93 ae 3b 07 4c 2b 0d 1c c4 3b 07 50 0f bf 05 a4 c1 3b 07 48 8b 15 45 c1 3b 07 4c 2b 05 0e c4 3b 07 50 e8 a4 c5 fb ff <0f> 0b 48 83 c4 20 49 81 fc 00 69 9a 88 74 0c 48 c7 c7 00 69 9a 88 [ 1120.625419] RSP: 0018:ffff8880ae807dc0 EFLAGS: 00010086 [ 1120.630776] RAX: 000000000000005e RBX: ffff8880aa25e280 RCX: 0000000000000000 [ 1120.638059] RDX: 0000000000000000 RSI: ffffffff815a92c6 RDI: ffffed1015d00faa [ 1120.645322] RBP: ffff8880ae807e00 R08: 000000000000005e R09: ffffed1015d05021 [ 1120.652583] R10: ffffed1015d05020 R11: ffff8880ae828107 R12: ffffffff889a6900 [ 1120.659847] R13: 0000000100014001 R14: 0000000000000286 R15: dffffc0000000000 [ 1120.667130] ? vprintk_func+0x86/0x189 [ 1120.671020] rcu_process_callbacks+0x3ba/0x1390 [ 1120.675686] ? rcu_check_gp_start_stall+0x240/0x240 [ 1120.680695] ? __lock_is_held+0xb6/0x140 [ 1120.684818] ? check_preemption_disabled+0x48/0x290 [ 1120.689834] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 1120.695293] __do_softirq+0x266/0x95a [ 1120.699084] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1120.704614] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1120.710159] irq_exit+0x180/0x1d0 [ 1120.713608] smp_apic_timer_interrupt+0x14a/0x570 [ 1120.718450] apic_timer_interrupt+0xf/0x20 [ 1120.722673] [ 1120.724909] RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 [ 1120.730358] Code: 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 38 0c 92 7e 81 e2 00 01 1f 00 75 2b 8b 90 d8 12 00 00 <83> fa 02 75 20 48 8b 88 e0 12 00 00 8b 80 dc 12 00 00 48 8b 11 48 [ 1120.749255] RSP: 0018:ffff8880a9bcf590 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 1120.756970] RAX: ffff888086a48500 RBX: ffff8880a9bcf688 RCX: ffffffff8700203f [ 1120.764230] RDX: 0000000000000000 RSI: ffffffff87002051 RDI: 0000000000000001 [ 1120.771495] RBP: ffff8880a9bcf590 R08: ffff888086a48500 R09: ffffed1015d05bd0 [ 1120.778759] R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff88809e40d742 [ 1120.786024] R13: ffff8880a9bcf6a0 R14: ffff88808474e778 R15: ffff88809e40d742 [ 1120.793315] ? xas_start+0x18f/0x560 [ 1120.797024] ? xas_start+0x1a1/0x560 [ 1120.800737] xas_start+0x1a1/0x560 [ 1120.804285] xas_load+0x21/0x150 [ 1120.807650] ? rcu_dynticks_curr_cpu_in_eqs+0x54/0xb0 [ 1120.812919] find_get_entry+0x13d/0x8d0 [ 1120.816980] ? __lock_acquire+0x53b/0x4700 [ 1120.821217] ? find_get_pages_range_tag+0xd90/0xd90 [ 1120.826234] ? __lock_is_held+0xb6/0x140 [ 1120.830314] ? ieee80211_vht_cap_ie_to_sta_vht_cap+0x410/0xdd0 [ 1120.836298] pagecache_get_page+0x4a/0x740 [ 1120.840546] generic_file_read_iter+0x716/0x2870 [ 1120.845318] ? lock_downgrade+0x810/0x810 [ 1120.849477] ? filemap_write_and_wait_range+0xd0/0xd0 [ 1120.854731] ? aa_file_perm+0x3f6/0xdc0 [ 1120.858725] ? trace_hardirqs_on+0x67/0x230 [ 1120.863063] ? aa_path_link+0x460/0x460 [ 1120.867036] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1120.872591] ? pipe_unlock+0x57/0x80 [ 1120.876320] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1120.881891] ? iter_file_splice_write+0x5a3/0xbe0 [ 1120.886747] ? atime_needs_update+0x5f0/0x5f0 [ 1120.891291] ext4_file_read_iter+0x180/0x3c0 [ 1120.895724] generic_file_splice_read+0x4b2/0x800 [ 1120.900572] ? add_to_pipe+0x350/0x350 [ 1120.904497] ? rw_verify_area+0x118/0x360 [ 1120.908641] ? add_to_pipe+0x350/0x350 [ 1120.912531] do_splice_to+0x12a/0x190 [ 1120.916333] splice_direct_to_actor+0x2d2/0x970 [ 1120.921001] ? generic_pipe_buf_nosteal+0x10/0x10 [ 1120.925852] ? do_splice_to+0x190/0x190 [ 1120.929829] ? rw_verify_area+0x118/0x360 [ 1120.933988] do_splice_direct+0x1da/0x2a0 [ 1120.938155] ? splice_direct_to_actor+0x970/0x970 [ 1120.942999] ? rcu_read_lock_sched_held+0x110/0x130 [ 1120.948014] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 1120.952770] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1120.958307] ? __sb_start_write+0x1ac/0x360 [ 1120.962629] do_sendfile+0x597/0xd00 [ 1120.966346] ? do_compat_pwritev64+0x1c0/0x1c0 [ 1120.970928] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1120.976513] ? _copy_from_user+0xdd/0x150 [ 1120.980668] __x64_sys_sendfile64+0x15a/0x220 [ 1120.985163] ? __ia32_sys_sendfile+0x230/0x230 [ 1120.989757] ? do_syscall_64+0x26/0x610 [ 1120.993730] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1120.998310] ? trace_hardirqs_on+0x67/0x230 [ 1121.002633] do_syscall_64+0x103/0x610 [ 1121.006523] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1121.011711] RIP: 0033:0x446a59 [ 1121.014903] Code: e8 dc e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 4b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 1121.033888] RSP: 002b:00007f032c353db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 1121.041592] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000446a59 [ 1121.048860] RDX: 0000000020000000 RSI: 0000000000000003 RDI: 0000000000000003 [ 1121.056123] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 1121.063902] R10: 00008080fffffffe R11: 0000000000000246 R12: 00000000006dcc2c [ 1121.071168] R13: 00007fff7d4161cf R14: 00007f032c3549c0 R15: 20c49ba5e353f7cf [ 1121.079999] Kernel Offset: disabled [ 1121.083731] Rebooting in 86400 seconds..