[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.422202][ T7110] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 59.434028][ T7110] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 59.443124][ T7110] CPU: 0 PID: 7110 Comm: syz-executor974 Not tainted 5.7.0-rc2-syzkaller #0 [ 59.451762][ T7110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.461800][ T7110] RIP: 0010:fq_codel_enqueue+0xa75/0x11b0 [ 59.467590][ T7110] Code: 28 fb 44 3b 64 24 70 0f 83 dd 00 00 00 e8 b3 58 28 fb 48 8b 44 24 40 80 38 00 0f 85 5a 05 00 00 49 8b 06 48 89 c2 48 c1 ea 03 <42> 80 3c 2a 00 0f 85 52 05 00 00 48 8b 10 49 89 16 48 89 c2 48 c1 [ 59.487181][ T7110] RSP: 0018:ffffc90000f877f0 EFLAGS: 00010246 [ 59.493218][ T7110] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90000f879d0 [ 59.501171][ T7110] RDX: 0000000000000000 RSI: ffffffff864ad5fd RDI: 0000000000000000 [ 59.509126][ T7110] RBP: ffffc90000f87900 R08: ffff888091ad44c0 R09: fffffbfff185cd54 [ 59.517112][ T7110] R10: ffffffff8c2e6a9f R11: fffffbfff185cd53 R12: 0000000000000400 [ 59.525101][ T7110] R13: dffffc0000000000 R14: ffff88808d480000 R15: ffffc90000f879d0 [ 59.533052][ T7110] FS: 00000000018fe880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 59.542071][ T7110] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.548675][ T7110] CR2: 0000000020000080 CR3: 000000009f4a1000 CR4: 00000000001406f0 [ 59.556632][ T7110] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.564588][ T7110] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.573102][ T7110] Call Trace: [ 59.576371][ T7110] ? drop_func+0x60/0x60 [ 59.580585][ T7110] ? rwlock_bug.part.0+0x90/0x90 [ 59.585526][ T7110] ? rcu_read_lock_bh_held+0x5a/0xb0 [ 59.590957][ T7110] ? rcu_read_lock_sched_held+0xd0/0xd0 [ 59.596498][ T7110] __dev_queue_xmit+0x154a/0x30a0 [ 59.601584][ T7110] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 59.606863][ T7110] ? _copy_from_iter+0x300/0xb60 [ 59.611772][ T7110] ? __phys_addr_symbol+0x2c/0x70 [ 59.616769][ T7110] ? __check_object_size+0x171/0x437 [ 59.622044][ T7110] ? packet_parse_headers.isra.0+0x117/0x470 [ 59.627996][ T7110] ? __unregister_prot_hook+0x320/0x320 [ 59.633526][ T7110] ? packet_sendmsg+0x23cc/0x5ce0 [ 59.638520][ T7110] packet_sendmsg+0x23cc/0x5ce0 [ 59.643620][ T7110] ? mark_held_locks+0xe0/0xe0 [ 59.648380][ T7110] ? aa_label_sk_perm+0x89/0xe0 [ 59.653222][ T7110] ? aa_sk_perm+0x319/0xab0 [ 59.657722][ T7110] ? packet_notifier+0x860/0x860 [ 59.662664][ T7110] ? aa_af_perm+0x260/0x260 [ 59.667145][ T7110] ? packet_do_bind+0x452/0xc00 [ 59.672150][ T7110] ? packet_notifier+0x860/0x860 [ 59.677167][ T7110] sock_sendmsg+0xcf/0x120 [ 59.681867][ T7110] __sys_sendto+0x220/0x330 [ 59.686366][ T7110] ? __ia32_sys_getpeername+0xb0/0xb0 [ 59.691718][ T7110] ? packet_do_bind+0x452/0xc00 [ 59.696549][ T7110] ? __sys_bind+0x13e/0x250 [ 59.701067][ T7110] ? __ia32_sys_socketpair+0xf0/0xf0 [ 59.706327][ T7110] ? sock_create_kern+0x40/0x40 [ 59.711250][ T7110] ? fpregs_mark_activate+0x320/0x320 [ 59.716600][ T7110] __x64_sys_sendto+0xdd/0x1b0 [ 59.721405][ T7110] ? lockdep_hardirqs_on+0x463/0x620 [ 59.726734][ T7110] do_syscall_64+0xf6/0x7d0 [ 59.731233][ T7110] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.737138][ T7110] RIP: 0033:0x4404e9 [ 59.741042][ T7110] 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 [ 59.760642][ T7110] RSP: 002b:00007ffc64e48a98 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 59.769112][ T7110] RAX: ffffffffffffffda RBX: 00000000004a167e RCX: 00000000004404e9 [ 59.777068][ T7110] RDX: 00000000000001e8 RSI: 0000000020000480 RDI: 0000000000000005 [ 59.785026][ T7110] RBP: 54c6c2ff093a6d32 R08: 0000000000000000 R09: 0000000000000000 [ 59.792968][ T7110] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000010000 [ 59.800914][ T7110] R13: 0000000000401e00 R14: 0000000000000000 R15: 0000000000000000 [ 59.808872][ T7110] Modules linked in: [ 59.812816][ T7110] ---[ end trace 6f34999d014f3539 ]--- [ 59.818307][ T7110] RIP: 0010:fq_codel_enqueue+0xa75/0x11b0 [ 59.824164][ T7110] Code: 28 fb 44 3b 64 24 70 0f 83 dd 00 00 00 e8 b3 58 28 fb 48 8b 44 24 40 80 38 00 0f 85 5a 05 00 00 49 8b 06 48 89 c2 48 c1 ea 03 <42> 80 3c 2a 00 0f 85 52 05 00 00 48 8b 10 49 89 16 48 89 c2 48 c1 [ 59.844698][ T7110] RSP: 0018:ffffc90000f877f0 EFLAGS: 00010246 [ 59.850797][ T7110] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90000f879d0 [ 59.858799][ T7110] RDX: 0000000000000000 RSI: ffffffff864ad5fd RDI: 0000000000000000 [ 59.866812][ T7110] RBP: ffffc90000f87900 R08: ffff888091ad44c0 R09: fffffbfff185cd54 [ 59.874814][ T7110] R10: ffffffff8c2e6a9f R11: fffffbfff185cd53 R12: 0000000000000400 [ 59.882834][ T7110] R13: dffffc0000000000 R14: ffff88808d480000 R15: ffffc90000f879d0 [ 59.890805][ T7110] FS: 00000000018fe880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 59.899774][ T7110] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.906494][ T7110] CR2: 0000000020000080 CR3: 000000009f4a1000 CR4: 00000000001406f0 [ 59.914676][ T7110] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.922694][ T7110] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.930661][ T7110] Kernel panic - not syncing: Fatal exception in interrupt [ 59.939262][ T7110] Kernel Offset: disabled [ 59.943579][ T7110] Rebooting in 86400 seconds..