[ 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 '10.128.0.243' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.004313][ T8452] general protection fault, probably for non-canonical address 0xdffffc00000000b3: 0000 [#1] PREEMPT SMP KASAN [ 77.016443][ T8452] KASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f] [ 77.024851][ T8452] CPU: 1 PID: 8452 Comm: syz-executor232 Not tainted 5.14.0-rc2-syzkaller #0 [ 77.033623][ T8452] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.043689][ T8452] RIP: 0010:add_del_if+0x57/0x140 [ 77.048732][ T8452] Code: 03 80 3c 02 00 0f 85 fd 00 00 00 48 8b 9d 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 98 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ca 00 00 00 4c 8b ab 98 05 00 00 48 b8 00 00 00 [ 77.068331][ T8452] RSP: 0018:ffffc9000131fa80 EFLAGS: 00010202 [ 77.074388][ T8452] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 77.082336][ T8452] RDX: 00000000000000b3 RSI: ffffffff87f667b6 RDI: 0000000000000598 [ 77.090288][ T8452] RBP: ffff888027c12c00 R08: 00000000000089a2 R09: ffffffff87f67f36 [ 77.098241][ T8452] R10: ffffffff87f68031 R11: 00000000000089a2 R12: 0000000000000001 [ 77.106191][ T8452] R13: ffffc9000131fd60 R14: 0000000000000000 R15: dffffc0000000000 [ 77.114249][ T8452] FS: 0000000001a93300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 77.123160][ T8452] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.129753][ T8452] CR2: 0000000020000080 CR3: 000000001d70b000 CR4: 00000000001506e0 [ 77.137705][ T8452] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.145655][ T8452] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.153615][ T8452] Call Trace: [ 77.157055][ T8452] br_ioctl_stub+0x1c6/0x7f0 [ 77.161808][ T8452] ? br_dev_siocdevprivate+0x15c0/0x15c0 [ 77.167456][ T8452] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 77.173834][ T8452] ? full_name_hash+0xb5/0xf0 [ 77.178524][ T8452] ? br_dev_siocdevprivate+0x15c0/0x15c0 [ 77.184155][ T8452] br_ioctl_call+0x5e/0xa0 [ 77.188605][ T8452] dev_ifsioc+0xc1f/0xf60 [ 77.192926][ T8452] ? dev_load+0x79/0x200 [ 77.197157][ T8452] ? sock_diag_broadcast_destroy+0x1a0/0x1a0 [ 77.203271][ T8452] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 77.209542][ T8452] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 77.215800][ T8452] ? netdev_name_node_lookup_rcu+0x108/0x150 [ 77.222398][ T8452] dev_ioctl+0x1b9/0xee0 [ 77.226642][ T8452] sock_do_ioctl+0x18b/0x210 [ 77.231232][ T8452] ? put_user_ifreq+0x140/0x140 [ 77.236095][ T8452] sock_ioctl+0x2f1/0x640 [ 77.240445][ T8452] ? br_ioctl_call+0xa0/0xa0 [ 77.245031][ T8452] ? lock_downgrade+0x6e0/0x6e0 [ 77.249957][ T8452] ? lock_downgrade+0x6e0/0x6e0 [ 77.254800][ T8452] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 77.261217][ T8452] ? br_ioctl_call+0xa0/0xa0 [ 77.265924][ T8452] __x64_sys_ioctl+0x193/0x200 [ 77.270800][ T8452] do_syscall_64+0x35/0xb0 [ 77.275563][ T8452] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 77.281629][ T8452] RIP: 0033:0x43ee49 [ 77.285787][ T8452] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 77.305556][ T8452] RSP: 002b:00007ffe1a0390d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 77.313959][ T8452] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee49 [ 77.321925][ T8452] RDX: 0000000020000080 RSI: 00000000000089a2 RDI: 0000000000000003 [ 77.329880][ T8452] RBP: 0000000000402e30 R08: 0000000000000000 R09: 0000000000400488 [ 77.337837][ T8452] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ec0 [ 77.345980][ T8452] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 [ 77.353963][ T8452] Modules linked in: [ 77.359527][ T8452] ---[ end trace 553995ce747437a4 ]--- [ 77.365015][ T8452] RIP: 0010:add_del_if+0x57/0x140 [ 77.370848][ T8452] Code: 03 80 3c 02 00 0f 85 fd 00 00 00 48 8b 9d 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 98 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ca 00 00 00 4c 8b ab 98 05 00 00 48 b8 00 00 00 [ 77.390832][ T8452] RSP: 0018:ffffc9000131fa80 EFLAGS: 00010202 [ 77.397608][ T8452] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 77.406448][ T8452] RDX: 00000000000000b3 RSI: ffffffff87f667b6 RDI: 0000000000000598 [ 77.414731][ T8452] RBP: ffff888027c12c00 R08: 00000000000089a2 R09: ffffffff87f67f36 [ 77.423292][ T8452] R10: ffffffff87f68031 R11: 00000000000089a2 R12: 0000000000000001 [ 77.431335][ T8452] R13: ffffc9000131fd60 R14: 0000000000000000 R15: dffffc0000000000 [ 77.439450][ T8452] FS: 0000000001a93300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 77.448425][ T8452] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.455103][ T8452] CR2: 00007f2e8eae1000 CR3: 000000001d70b000 CR4: 00000000001506f0 [ 77.463398][ T8452] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.471424][ T8452] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.482093][ T8452] Kernel panic - not syncing: Fatal exception [ 77.488212][ T8452] Kernel Offset: disabled [ 77.492528][ T8452] Rebooting in 86400 seconds..