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


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.15.207' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   43.337443][ T6768] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
[   43.349246][ T6768] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
[   43.357643][ T6768] CPU: 0 PID: 6768 Comm: syz-executor006 Not tainted 5.7.0-syzkaller #0
[   43.366393][ T6768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   43.376708][ T6768] RIP: 0010:qrtr_endpoint_post+0x8f/0x1110
[   43.382598][ T6768] Code: 44 89 ee ba 20 0a 00 00 e8 ce 43 50 fe 48 85 c0 0f 84 5c 02 00 00 49 89 c7 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <8a> 04 08 84 c0 0f 85 7d 09 00 00 4d 8d 77 28 41 0f b6 1c 24 48 89
[   43.403366][ T6768] RSP: 0018:ffffc90001627d10 EFLAGS: 00010202
[   43.409407][ T6768] RAX: 0000000000000002 RBX: ffff8880a52d5508 RCX: dffffc0000000000
[   43.417359][ T6768] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880932f3df8
[   43.425301][ T6768] RBP: ffff888093bf7800 R08: ffffffff865f757c R09: ffffed1010da26dd
[   43.433246][ T6768] R10: ffffed1010da26dd R11: 0000000000000000 R12: 0000000000000010
[   43.441190][ T6768] R13: 0000000000000000 R14: ffffc90001627dc8 R15: ffff8880932f3d40
[   43.449149][ T6768] FS:  0000000001166880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   43.458063][ T6768] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.464614][ T6768] CR2: 0000000020000000 CR3: 00000000a845e000 CR4: 00000000001406f0
[   43.472654][ T6768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.480605][ T6768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.488549][ T6768] Call Trace:
[   43.491824][ T6768]  ? __kmalloc+0x2b/0x330
[   43.496126][ T6768]  ? __check_object_size+0x2fd/0x3f0
[   43.501385][ T6768]  qrtr_tun_write_iter+0xc6/0x120
[   43.506386][ T6768]  __vfs_write+0x52f/0x6e0
[   43.510777][ T6768]  vfs_write+0x274/0x580
[   43.515105][ T6768]  ksys_write+0x11b/0x220
[   43.519421][ T6768]  do_syscall_64+0xf3/0x1b0
[   43.523991][ T6768]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   43.529874][ T6768] RIP: 0033:0x4401b9
[   43.533750][ T6768] 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
[   43.553332][ T6768] RSP: 002b:00007ffe1d757c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   43.561716][ T6768] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401b9
[   43.572971][ T6768] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[   43.580915][ T6768] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   43.588858][ T6768] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40
[   43.596851][ T6768] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000
[   43.605156][ T6768] Modules linked in:
[   43.620999][ T6768] ---[ end trace b64a12e9d8a4669e ]---
[   43.626498][ T6768] RIP: 0010:qrtr_endpoint_post+0x8f/0x1110
[   43.633593][ T6768] Code: 44 89 ee ba 20 0a 00 00 e8 ce 43 50 fe 48 85 c0 0f 84 5c 02 00 00 49 89 c7 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <8a> 04 08 84 c0 0f 85 7d 09 00 00 4d 8d 77 28 41 0f b6 1c 24 48 89
[   43.654030][ T6768] RSP: 0018:ffffc90001627d10 EFLAGS: 00010202
[   43.660547][ T6768] RAX: 0000000000000002 RBX: ffff8880a52d5508 RCX: dffffc0000000000
[   43.668950][ T6768] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880932f3df8
[   43.677080][ T6768] RBP: ffff888093bf7800 R08: ffffffff865f757c R09: ffffed1010da26dd
[   43.685883][ T6768] R10: ffffed1010da26dd R11: 0000000000000000 R12: 0000000000000010
[   43.694326][ T6768] R13: 0000000000000000 R14: ffffc90001627dc8 R15: ffff8880932f3d40
[   43.702733][ T6768] FS:  0000000001166880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   43.712197][ T6768] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.719183][ T6768] CR2: 00007f42a2bf4000 CR3: 00000000a845e000 CR4: 00000000001406f0
[   43.727157][ T6768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   43.735757][ T6768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   43.744222][ T6768] Kernel panic - not syncing: Fatal exception
[   43.751532][ T6768] Kernel Offset: disabled
[   43.755855][ T6768] Rebooting in 86400 seconds..