[ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started Regular background program processing daemon. Starting getty on tty2-tty6 if dbus and logind are not available... Starting OpenBSD Secure Shell server... [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Found device /dev/ttyS0. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ 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... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.123' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.070100][ T27] audit: type=1400 audit(1593248140.895:8): avc: denied { execmem } for pid=6812 comm="syz-executor171" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 70.073388][ T6812] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 70.104586][ T6812] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 70.113747][ T6812] CPU: 1 PID: 6812 Comm: syz-executor171 Not tainted 5.8.0-rc2-syzkaller #0 [ 70.122413][ T6812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.133038][ T6812] RIP: 0010:qrtr_endpoint_post+0x92/0x1010 [ 70.138970][ T6812] Code: 44 89 e6 e8 80 51 50 fe 48 85 c0 48 89 c5 0f 84 c4 0e 00 00 e8 ef 6b 96 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 4a 0d 00 00 [ 70.160205][ T6812] RSP: 0018:ffffc90001277c60 EFLAGS: 00010202 [ 70.166379][ T6812] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffffff862d38d2 [ 70.174762][ T6812] RDX: 0000000000000002 RSI: ffffffff87dce501 RDI: ffff888091a40e50 [ 70.183268][ T6812] RBP: ffff888091a40e40 R08: 0000000000000001 R09: ffff8880865698e3 [ 70.191816][ T6812] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 70.201791][ T6812] R13: ffff888097eb9f00 R14: ffffc90001277ec8 R15: 0000000000000000 [ 70.209892][ T6812] FS: 00000000009a7880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 70.219187][ T6812] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.226033][ T6812] CR2: 00000000004551b0 CR3: 000000008d4a6000 CR4: 00000000001406e0 [ 70.234160][ T6812] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.242301][ T6812] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.250708][ T6812] Call Trace: [ 70.254081][ T6812] ? __check_object_size+0x30/0x3e4 [ 70.259283][ T6812] qrtr_tun_write_iter+0xf5/0x180 [ 70.264305][ T6812] new_sync_write+0x422/0x650 [ 70.270067][ T6812] ? new_sync_read+0x6e0/0x6e0 [ 70.274862][ T6812] ? inode_security+0x102/0x130 [ 70.279698][ T6812] ? security_file_permission+0x239/0x470 [ 70.285535][ T6812] __vfs_write+0xc9/0x100 [ 70.289938][ T6812] vfs_write+0x268/0x5d0 [ 70.294348][ T6812] ksys_write+0x12d/0x250 [ 70.298746][ T6812] ? __ia32_sys_read+0xb0/0xb0 [ 70.303831][ T6812] ? do_syscall_64+0x1c/0xe0 [ 70.308411][ T6812] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 70.314382][ T6812] do_syscall_64+0x60/0xe0 [ 70.318901][ T6812] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 70.324790][ T6812] RIP: 0033:0x440249 [ 70.328802][ T6812] Code: Bad RIP value. [ 70.332851][ T6812] RSP: 002b:00007ffc183d4298 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 70.341436][ T6812] RAX: ffffffffffffffda RBX: 00007ffc183d42a0 RCX: 0000000000440249 [ 70.349497][ T6812] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 70.357466][ T6812] RBP: 00000000006ca018 R08: 000000000000000f R09: 65732f636f72702f [ 70.365667][ T6812] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b30 [ 70.373731][ T6812] R13: 0000000000401bc0 R14: 0000000000000000 R15: 0000000000000000 [ 70.381725][ T6812] Modules linked in: [ 70.386359][ T6812] ---[ end trace 2fdacdf0f2b20f4e ]--- [ 70.392382][ T6812] RIP: 0010:qrtr_endpoint_post+0x92/0x1010 [ 70.400908][ T6812] Code: 44 89 e6 e8 80 51 50 fe 48 85 c0 48 89 c5 0f 84 c4 0e 00 00 e8 ef 6b 96 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 4a 0d 00 00 [ 70.422923][ T6812] RSP: 0018:ffffc90001277c60 EFLAGS: 00010202 [ 70.429378][ T6812] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffffff862d38d2 [ 70.437667][ T6812] RDX: 0000000000000002 RSI: ffffffff87dce501 RDI: ffff888091a40e50 [ 70.445760][ T6812] RBP: ffff888091a40e40 R08: 0000000000000001 R09: ffff8880865698e3 [ 70.453869][ T6812] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 70.462556][ T6812] R13: ffff888097eb9f00 R14: ffffc90001277ec8 R15: 0000000000000000 [ 70.470773][ T6812] FS: 00000000009a7880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 70.479995][ T6812] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.486791][ T6812] CR2: 00000000004551b0 CR3: 000000008d4a6000 CR4: 00000000001406e0 [ 70.494782][ T6812] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.502942][ T6812] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.510984][ T6812] Kernel panic - not syncing: Fatal exception [ 70.519003][ T6812] Kernel Offset: disabled [ 70.523607][ T6812] Rebooting in 86400 seconds..