[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.059730][ T27] audit: type=1800 audit(1561948342.712:25): pid=8548 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.081379][ T27] audit: type=1800 audit(1561948342.712:26): pid=8548 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.101947][ T27] audit: type=1800 audit(1561948342.712:27): pid=8548 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 '10.128.0.217' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 952.136909][ T27] kauditd_printk_skb: 3 callbacks suppressed [ 952.136918][ T27] audit: type=1804 audit(1561949239.792:31): pid=8714 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 [ 952.163338][ T27] audit: type=1804 audit(1561949239.792:32): pid=8709 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 executing program [ 952.197626][ T27] audit: type=1804 audit(1561949239.852:33): pid=8715 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 [ 952.219510][ T27] audit: type=1804 audit(1561949239.872:34): pid=8718 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 executing program executing program executing program executing program executing program [ 952.242252][ T27] audit: type=1804 audit(1561949239.872:35): pid=8716 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 [ 952.277156][ T27] audit: type=1804 audit(1561949239.872:36): pid=8717 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 executing program executing program [ 952.297228][ T27] audit: type=1804 audit(1561949239.892:37): pid=8716 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 [ 952.317947][ T27] audit: type=1804 audit(1561949239.892:38): pid=8717 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 executing program [ 952.338631][ T27] audit: type=1804 audit(1561949239.892:39): pid=8720 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 [ 952.358813][ T27] audit: type=1804 audit(1561949239.892:40): pid=8719 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor491" name="/root/bus" dev="sda1" ino=2339 res=1 executing program executing program executing program executing program executing program executing program executing program executing program [ 952.389120][ T8728] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 952.402194][ T8728] File: /root/bus PID: 8728 Comm: syz-executor491 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 952.492600][ T8763] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 952.505078][ T8763] File: /root/bus PID: 8763 Comm: syz-executor491 [ 952.518434][ T8769] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 952.533083][ T8769] File: /root/bus PID: 8769 Comm: syz-executor491 executing program executing program [ 952.560872][ T8780] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 952.573188][ T8780] File: /root/bus PID: 8780 Comm: syz-executor491 executing program [ 952.610192][ T8790] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 952.622086][ T8790] File: /root/bus PID: 8790 Comm: syz-executor491 [ 952.634202][ T8790] WARNING: CPU: 1 PID: 8790 at fs/ext4/inode.c:3936 ext4_set_page_dirty+0x34d/0x480 [ 952.643718][ T8790] Kernel panic - not syncing: panic_on_warn set ... [ 952.650305][ T8790] CPU: 1 PID: 8790 Comm: syz-executor491 Not tainted 5.2.0-rc6-next-20190628 #25 [ 952.659580][ T8790] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 952.669620][ T8790] Call Trace: [ 952.672959][ T8790] dump_stack+0x172/0x1f0 [ 952.677499][ T8790] ? ext4_set_page_dirty+0x250/0x480 [ 952.682787][ T8790] panic+0x2dc/0x755 [ 952.686761][ T8790] ? add_taint.cold+0x16/0x16 [ 952.691448][ T8790] ? kasan_check_write+0x14/0x20 [ 952.696497][ T8790] ? __warn.cold+0x5/0x4c [ 952.700913][ T8790] ? __warn+0xe7/0x1e0 [ 952.704963][ T8790] ? ext4_set_page_dirty+0x34d/0x480 [ 952.710413][ T8790] __warn.cold+0x20/0x4c [ 952.714649][ T8790] ? __lock_acquire+0x1700/0x4c20 [ 952.719677][ T8790] ? ext4_set_page_dirty+0x34d/0x480 [ 952.724960][ T8790] report_bug+0x263/0x2b0 [ 952.729413][ T8790] do_error_trap+0x11b/0x200 [ 952.733991][ T8790] do_invalid_op+0x37/0x50 [ 952.738390][ T8790] ? ext4_set_page_dirty+0x34d/0x480 [ 952.743912][ T8790] invalid_op+0x14/0x20 [ 952.749117][ T8790] RIP: 0010:ext4_set_page_dirty+0x34d/0x480 [ 952.755010][ T8790] Code: ff e8 67 d8 7b ff 49 8d 5f ff e9 a3 fd ff ff e8 59 d8 7b ff 48 c7 c6 e0 36 9c 87 4c 89 e7 e8 7a 47 a5 ff 0f 0b e8 43 d8 7b ff <0f> 0b e9 56 ff ff ff e8 37 d8 7b ff 4c 89 ea 48 b8 00 00 00 00 00 [ 952.775057][ T8790] RSP: 0018:ffff88808cd579e0 EFLAGS: 00010293 [ 952.781328][ T8790] RAX: ffff88808d24e640 RBX: 0000000000000000 RCX: ffffffff81f68452 [ 952.789288][ T8790] RDX: 0000000000000000 RSI: ffffffff81f684fd RDI: 0000000000000001 [ 952.797512][ T8790] RBP: ffff88808cd57a08 R08: ffff88808d24e640 R09: fffff94000442651 [ 952.805472][ T8790] R10: fffff94000442650 R11: ffffea0002213287 R12: ffffea0002213280 [ 952.813962][ T8790] R13: ffffea0002213288 R14: 0000000000000000 R15: ffffea0002140048 [ 952.821948][ T8790] ? ext4_set_page_dirty+0x2a2/0x480 [ 952.827236][ T8790] ? ext4_set_page_dirty+0x34d/0x480 [ 952.832681][ T8790] ? ext4_update_bh_state+0x110/0x110 [ 952.838159][ T8790] set_page_dirty+0x301/0x850 [ 952.842994][ T8790] set_page_dirty_lock+0x99/0xe0 [ 952.847934][ T8790] process_vm_rw_core.isra.0+0x527/0xb10 [ 952.853579][ T8790] ? __vmalloc_node_range.cold+0x26/0x26 [ 952.859458][ T8790] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 952.865698][ T8790] ? _copy_from_user+0x12c/0x1a0 [ 952.870625][ T8790] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 952.876420][ T8790] ? rw_copy_check_uvector+0x2ce/0x390 [ 952.881876][ T8790] ? do_futex+0x17d/0x1dc0 [ 952.886292][ T8790] process_vm_rw+0x21f/0x240 [ 952.890882][ T8790] ? process_vm_rw_core.isra.0+0xb10/0xb10 [ 952.896960][ T8790] ? exit_robust_list+0x2c0/0x2c0 [ 952.901983][ T8790] ? kasan_check_read+0x11/0x20 [ 952.906885][ T8790] ? __lock_acquire+0x8a2/0x4c20 [ 952.911828][ T8790] ? __task_pid_nr_ns+0x1b1/0x540 [ 952.916836][ T8790] ? find_held_lock+0x35/0x130 [ 952.921583][ T8790] ? __task_pid_nr_ns+0x1b1/0x540 [ 952.926629][ T8790] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 952.932909][ T8790] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 952.938366][ T8790] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 952.943873][ T8790] ? do_syscall_64+0x26/0x6a0 [ 952.948678][ T8790] __x64_sys_process_vm_writev+0xe3/0x1a0 [ 952.954406][ T8790] do_syscall_64+0xfd/0x6a0 [ 952.958960][ T8790] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 952.964849][ T8790] RIP: 0033:0x4468b9 [ 952.968736][ T8790] Code: e8 0c e8 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 952.988726][ T8790] RSP: 002b:00007f7764294da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000137 [ 952.997271][ T8790] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 00000000004468b9 [ 953.005323][ T8790] RDX: 0000000000000001 RSI: 0000000020000540 RDI: 0000000000002255 [ 953.013471][ T8790] RBP: 00000000006dbc40 R08: 0000000000000001 R09: 0000000000000000 [ 953.021448][ T8790] R10: 00000000200003c0 R11: 0000000000000246 R12: 00000000006dbc4c [ 953.029560][ T8790] R13: 00007fff727e14ff R14: 00007f77642959c0 R15: 0000000000000000 [ 953.039187][ T8790] Kernel Offset: disabled [ 953.043589][ T8790] Rebooting in 86400 seconds..