[  OK  ] Started Getty on tty2.
[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.10.31' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   67.045728][   T28] audit: type=1400 audit(1592973405.549:8): avc:  denied  { execmem } for  pid=6780 comm="syz-executor827" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   67.051176][ T6780] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
[   67.078409][ T6780] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
[   67.086815][ T6780] CPU: 0 PID: 6780 Comm: syz-executor827 Not tainted 5.7.0-syzkaller #0
[   67.095132][ T6780] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   67.105190][ T6780] RIP: 0010:qrtr_endpoint_post+0x92/0xfa0
[   67.110922][ T6780] Code: 44 89 e6 e8 80 27 4e fe 48 85 c0 48 89 c5 0f 84 57 0e 00 00 e8 4f 7a 9e f9 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 f7 0c 00 00
[   67.131637][ T6780] RSP: 0018:ffffc900016a7c48 EFLAGS: 00010202
[   67.137680][ T6780] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffffff86237e4b
[   67.145734][ T6780] RDX: 0000000000000002 RSI: ffffffff87d55471 RDI: ffff888090444150
[   67.153833][ T6780] RBP: ffff888090444140 R08: ffff8880954ca340 R09: ffffed1011e43c5d
[   67.161977][ T6780] R10: ffff88808f21e2e3 R11: ffffed1011e43c5c R12: 0000000000000000
[   67.170110][ T6780] R13: ffff88809a089100 R14: ffffc900016a7eb0 R15: 0000000000000000
[   67.178162][ T6780] FS:  0000000000a65880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
[   67.187613][ T6780] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.194171][ T6780] CR2: 0000000020000000 CR3: 0000000099699000 CR4: 00000000001406f0
[   67.202465][ T6780] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.211279][ T6780] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.219222][ T6780] Call Trace:
[   67.222492][ T6780]  ? find_held_lock+0x2d/0x110
[   67.227859][ T6780]  qrtr_tun_write_iter+0xf5/0x180
[   67.232873][ T6780]  new_sync_write+0x426/0x650
[   67.237529][ T6780]  ? new_sync_read+0x6d0/0x6d0
[   67.242276][ T6780]  ? __inode_security_revalidate+0xf0/0x140
[   67.248145][ T6780]  ? security_file_permission+0x8c/0x470
[   67.253771][ T6780]  ? file_open_root+0x400/0x400
[   67.258630][ T6780]  __vfs_write+0xc9/0x100
[   67.262967][ T6780]  vfs_write+0x268/0x5d0
[   67.267188][ T6780]  ksys_write+0x12d/0x250
[   67.271490][ T6780]  ? __ia32_sys_read+0xb0/0xb0
[   67.276237][ T6780]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   67.282729][ T6780]  ? do_syscall_64+0x21/0x7d0
[   67.287491][ T6780]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   67.294593][ T6780]  do_syscall_64+0xf6/0x7d0
[   67.299113][ T6780]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   67.304988][ T6780] RIP: 0033:0x4401b9
[   67.308871][ T6780] 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
[   67.328894][ T6780] RSP: 002b:00007fff99653dd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   67.337744][ T6780] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401b9
[   67.345784][ T6780] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[   67.354423][ T6780] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   67.362386][ T6780] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40
[   67.370777][ T6780] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000
[   67.380224][ T6780] Modules linked in:
[   67.384694][ T6780] ---[ end trace 5199d7949b247ba3 ]---
[   67.390217][ T6780] RIP: 0010:qrtr_endpoint_post+0x92/0xfa0
[   67.396030][ T6780] Code: 44 89 e6 e8 80 27 4e fe 48 85 c0 48 89 c5 0f 84 57 0e 00 00 e8 4f 7a 9e f9 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 f7 0c 00 00
[   67.415863][ T6780] RSP: 0018:ffffc900016a7c48 EFLAGS: 00010202
[   67.421976][ T6780] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffffff86237e4b
[   67.430000][ T6780] RDX: 0000000000000002 RSI: ffffffff87d55471 RDI: ffff888090444150
[   67.438019][ T6780] RBP: ffff888090444140 R08: ffff8880954ca340 R09: ffffed1011e43c5d
[   67.446320][ T6780] R10: ffff88808f21e2e3 R11: ffffed1011e43c5c R12: 0000000000000000
[   67.455149][ T6780] R13: ffff88809a089100 R14: ffffc900016a7eb0 R15: 0000000000000000
[   67.463250][ T6780] FS:  0000000000a65880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
[   67.472280][ T6780] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   67.479768][ T6780] CR2: 0000000020000000 CR3: 0000000099699000 CR4: 00000000001406f0
[   67.487828][ T6780] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   67.496038][ T6780] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   67.504063][ T6780] Kernel panic - not syncing: Fatal exception
[   67.511690][ T6780] Kernel Offset: disabled
[   67.516113][ T6780] Rebooting in 86400 seconds..