[  OK  ] Started Serial Getty on ttyS0.
[  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 '10.128.0.229' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   40.872058][ T6810] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
[   40.883899][ T6810] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
[   40.892326][ T6810] CPU: 1 PID: 6810 Comm: syz-executor018 Not tainted 5.8.0-rc2-syzkaller #0
[   40.901081][ T6810] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.911111][ T6810] RIP: 0010:qrtr_endpoint_post+0x8f/0x1110
[   40.916886][ T6810] Code: 44 89 ee ba 20 0a 00 00 e8 0e d9 4f 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
[   40.936509][ T6810] RSP: 0018:ffffc900023efd20 EFLAGS: 00010202
[   40.942547][ T6810] RAX: 0000000000000002 RBX: ffff8880a73efd08 RCX: dffffc0000000000
[   40.950538][ T6810] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a1cdac38
[   40.958531][ T6810] RBP: ffff8880a2805800 R08: ffffffff866434bc R09: ffffed1010b32c1d
[   40.966470][ T6810] R10: ffffed1010b32c1d R11: 0000000000000000 R12: 0000000000000010
[   40.974411][ T6810] R13: 0000000000000000 R14: ffffc900023efdd8 R15: ffff8880a1cdab80
[   40.982353][ T6810] FS:  00000000008a2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
[   40.991252][ T6810] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.997802][ T6810] CR2: 00000000004551b0 CR3: 0000000093caa000 CR4: 00000000001406e0
[   41.005744][ T6810] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   41.013683][ T6810] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   41.021620][ T6810] Call Trace:
[   41.024880][ T6810]  ? __kmalloc+0x2b/0x330
[   41.029180][ T6810]  ? __check_object_size+0x2fd/0x3f0
[   41.034441][ T6810]  ? _raw_spin_unlock_irqrestore+0x68/0xd0
[   41.040216][ T6810]  qrtr_tun_write_iter+0xc6/0x120
[   41.045208][ T6810]  __vfs_write+0x52f/0x6e0
[   41.049596][ T6810]  vfs_write+0x274/0x580
[   41.053806][ T6810]  ksys_write+0x11b/0x220
[   41.058105][ T6810]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   41.064137][ T6810]  do_syscall_64+0x73/0xe0
[   41.068524][ T6810]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   41.074427][ T6810] RIP: 0033:0x440249
[   41.078285][ T6810] Code: Bad RIP value.
[   41.082370][ T6810] RSP: 002b:00007ffde0e93aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   41.090786][ T6810] RAX: ffffffffffffffda RBX: 00007ffde0e93ab0 RCX: 0000000000440249
[   41.098768][ T6810] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
[   41.106720][ T6810] RBP: 00000000006ca018 R08: 000000000000000f R09: 65732f636f72702f
[   41.114658][ T6810] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b30
[   41.122594][ T6810] R13: 0000000000401bc0 R14: 0000000000000000 R15: 0000000000000000
[   41.130536][ T6810] Modules linked in:
[   41.135706][ T6810] ---[ end trace fb0bc1429785a12d ]---
[   41.141199][ T6810] RIP: 0010:qrtr_endpoint_post+0x8f/0x1110
[   41.147007][ T6810] Code: 44 89 ee ba 20 0a 00 00 e8 0e d9 4f 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
[   41.166838][ T6810] RSP: 0018:ffffc900023efd20 EFLAGS: 00010202
[   41.172996][ T6810] RAX: 0000000000000002 RBX: ffff8880a73efd08 RCX: dffffc0000000000
[   41.180987][ T6810] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a1cdac38
[   41.188971][ T6810] RBP: ffff8880a2805800 R08: ffffffff866434bc R09: ffffed1010b32c1d
[   41.196922][ T6810] R10: ffffed1010b32c1d R11: 0000000000000000 R12: 0000000000000010
[   41.204916][ T6810] R13: 0000000000000000 R14: ffffc900023efdd8 R15: ffff8880a1cdab80
[   41.212906][ T6810] FS:  00000000008a2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
[   41.221850][ T6810] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   41.228452][ T6810] CR2: 00000000004551b0 CR3: 0000000093caa000 CR4: 00000000001406e0
[   41.236412][ T6810] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   41.244390][ T6810] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   41.252379][ T6810] Kernel panic - not syncing: Fatal exception
[   41.259671][ T6810] Kernel Offset: disabled
[   41.263975][ T6810] Rebooting in 86400 seconds..