[ 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. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.649784][ T6812] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 55.661520][ T6812] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 55.669938][ T6812] CPU: 1 PID: 6812 Comm: syz-executor860 Not tainted 5.7.0-syzkaller #0 [ 55.678233][ T6812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.688283][ T6812] RIP: 0010:qrtr_endpoint_post+0x92/0xfa0 [ 55.693978][ T6812] 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 [ 55.713668][ T6812] RSP: 0018:ffffc90001e67c48 EFLAGS: 00010202 [ 55.719710][ T6812] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffffff86237e4b [ 55.727666][ T6812] RDX: 0000000000000002 RSI: ffffffff87d55471 RDI: ffff888096e1a050 [ 55.735611][ T6812] RBP: ffff888096e1a040 R08: ffff8880a26dc440 R09: ffffed101214bb9d [ 55.743568][ T6812] R10: ffff888090a5dce3 R11: ffffed101214bb9c R12: 0000000000000000 [ 55.751525][ T6812] R13: ffff88809a7a6600 R14: ffffc90001e67eb0 R15: 0000000000000000 [ 55.759478][ T6812] FS: 00000000018be880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 55.768422][ T6812] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.774982][ T6812] CR2: 00000000006cb090 CR3: 00000000a26f7000 CR4: 00000000001406e0 [ 55.782937][ T6812] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.790885][ T6812] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.798835][ T6812] Call Trace: [ 55.802108][ T6812] qrtr_tun_write_iter+0xf5/0x180 [ 55.807116][ T6812] new_sync_write+0x426/0x650 [ 55.811771][ T6812] ? new_sync_read+0x6d0/0x6d0 [ 55.816518][ T6812] ? apparmor_path_rmdir+0x30/0x30 [ 55.821613][ T6812] ? security_file_permission+0x8c/0x470 [ 55.827260][ T6812] __vfs_write+0xc9/0x100 [ 55.831567][ T6812] vfs_write+0x268/0x5d0 [ 55.835936][ T6812] ksys_write+0x12d/0x250 [ 55.840292][ T6812] ? __ia32_sys_read+0xb0/0xb0 [ 55.845055][ T6812] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 55.851008][ T6812] ? do_syscall_64+0x21/0x7d0 [ 55.855683][ T6812] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 55.861642][ T6812] do_syscall_64+0xf6/0x7d0 [ 55.866135][ T6812] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 55.872013][ T6812] RIP: 0033:0x4411a9 [ 55.875882][ T6812] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 55.895458][ T6812] RSP: 002b:00007ffede424498 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 55.903858][ T6812] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004411a9 [ 55.911819][ T6812] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 55.919778][ T6812] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 55.927722][ T6812] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401fd0 [ 55.935665][ T6812] R13: 0000000000402060 R14: 0000000000000000 R15: 0000000000000000 [ 55.943612][ T6812] Modules linked in: [ 55.948794][ T6812] ---[ end trace 14a0c5691a2d76af ]--- [ 55.954327][ T6812] RIP: 0010:qrtr_endpoint_post+0x92/0xfa0 [ 55.960364][ T6812] 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 [ 55.980021][ T6812] RSP: 0018:ffffc90001e67c48 EFLAGS: 00010202 [ 55.986072][ T6812] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffffff86237e4b [ 55.994353][ T6812] RDX: 0000000000000002 RSI: ffffffff87d55471 RDI: ffff888096e1a050 [ 56.002380][ T6812] RBP: ffff888096e1a040 R08: ffff8880a26dc440 R09: ffffed101214bb9d [ 56.010439][ T6812] R10: ffff888090a5dce3 R11: ffffed101214bb9c R12: 0000000000000000 [ 56.018392][ T6812] R13: ffff88809a7a6600 R14: ffffc90001e67eb0 R15: 0000000000000000 [ 56.026401][ T6812] FS: 00000000018be880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 56.035573][ T6812] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.042186][ T6812] CR2: 00007f5ea403c168 CR3: 00000000a26f7000 CR4: 00000000001406e0 [ 56.050185][ T6812] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.058137][ T6812] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.066154][ T6812] Kernel panic - not syncing: Fatal exception [ 56.073497][ T6812] Kernel Offset: disabled [ 56.077821][ T6812] Rebooting in 86400 seconds..