[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.935381][ T26] audit: type=1800 audit(1574265945.307:25): pid=8815 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.970017][ T26] audit: type=1800 audit(1574265945.307:26): pid=8815 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.992187][ T26] audit: type=1800 audit(1574265945.307:27): pid=8815 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 '10.128.0.239' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.574499][ T8968] kasan: CONFIG_KASAN_INLINE enabled [ 72.579977][ T8968] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 72.588044][ T8968] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 72.594964][ T8968] CPU: 0 PID: 8968 Comm: syz-executor566 Not tainted 5.4.0-rc8-next-20191119-syzkaller #0 [ 72.604824][ T8968] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.615068][ T8968] RIP: 0010:tss_update_io_bitmap+0x138/0x590 [ 72.621027][ T8968] Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 9e 03 00 00 4c 89 ea 4c 8b 73 68 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 72 03 00 00 4d 3b 75 00 0f 85 35 02 00 00 48 8d [ 72.640629][ T8968] RSP: 0018:ffff8880a4effe80 EFLAGS: 00010046 [ 72.646690][ T8968] RAX: dffffc0000000000 RBX: ffff8880ae80a000 RCX: ffffffff812a3228 [ 72.654659][ T8968] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880ae80a068 [ 72.662620][ T8968] RBP: ffff8880a4efff10 R08: 1ffff110126f5020 R09: ffffed10126f5021 [ 72.670654][ T8968] R10: ffffed10126f5020 R11: ffff8880937a8107 R12: 1ffff110149dffd2 [ 72.678599][ T8968] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 72.686557][ T8968] FS: 0000000001e8f880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 72.695462][ T8968] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.702458][ T8968] CR2: 00007ffff01c2038 CR3: 0000000099c07000 CR4: 00000000001406f0 [ 72.710419][ T8968] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.718366][ T8968] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.726575][ T8968] Call Trace: [ 72.729858][ T8968] ? set_tsc_mode+0x330/0x330 [ 72.734692][ T8968] ? lockdown_is_locked_down+0x42/0xb4 [ 72.740488][ T8968] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.746531][ T8968] ? trace_hardirqs_off+0x62/0x240 [ 72.751627][ T8968] ? task_update_io_bitmap+0x78/0xe0 [ 72.756903][ T8968] do_syscall_64+0x685/0x790 [ 72.761557][ T8968] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.767523][ T8968] RIP: 0033:0x4400f9 [ 72.771418][ T8968] 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 [ 72.791007][ T8968] RSP: 002b:00007ffff000a2d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ac [ 72.799514][ T8968] RAX: 0000000000000000 RBX: 00000000004002c8 RCX: 00000000004400f9 [ 72.807471][ T8968] RDX: 0000000000400a20 RSI: 0000000000000012 RDI: 0000000000000003 [ 72.815424][ T8968] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 72.823385][ T8968] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401980 [ 72.831440][ T8968] R13: 0000000000401a10 R14: 0000000000000000 R15: 0000000000000000 [ 72.839405][ T8968] Modules linked in: [ 72.843288][ T8968] ---[ end trace 6bbd68071a8b58ba ]--- [ 72.848731][ T8968] RIP: 0010:tss_update_io_bitmap+0x138/0x590 [ 72.854691][ T8968] Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 9e 03 00 00 4c 89 ea 4c 8b 73 68 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 72 03 00 00 4d 3b 75 00 0f 85 35 02 00 00 48 8d [ 72.874968][ T8968] RSP: 0018:ffff8880a4effe80 EFLAGS: 00010046 [ 72.881007][ T8968] RAX: dffffc0000000000 RBX: ffff8880ae80a000 RCX: ffffffff812a3228 [ 72.888967][ T8968] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880ae80a068 [ 72.896921][ T8968] RBP: ffff8880a4efff10 R08: 1ffff110126f5020 R09: ffffed10126f5021 [ 72.904882][ T8968] R10: ffffed10126f5020 R11: ffff8880937a8107 R12: 1ffff110149dffd2 [ 72.912835][ T8968] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 72.920796][ T8968] FS: 0000000001e8f880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 72.929703][ T8968] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.936263][ T8968] CR2: 00007ffff01c2038 CR3: 0000000099c07000 CR4: 00000000001406f0 [ 72.944224][ T8968] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.952243][ T8968] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.960337][ T8968] Kernel panic - not syncing: Fatal exception [ 72.967963][ T8968] Kernel Offset: disabled [ 72.972287][ T8968] Rebooting in 86400 seconds..