[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 56.493644][ T7101] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 56.505382][ T7101] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 56.513867][ T7101] CPU: 1 PID: 7101 Comm: syz-executor203 Not tainted 5.7.0-rc1-syzkaller #0 [ 56.522507][ T7101] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.532749][ T7101] RIP: 0010:fq_codel_enqueue+0xa75/0x11b0 [ 56.538444][ T7101] Code: 28 fb 44 3b 64 24 70 0f 83 dd 00 00 00 e8 13 5e 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 [ 56.558021][ T7101] RSP: 0018:ffffc900018377f0 EFLAGS: 00010246 [ 56.564085][ T7101] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900018379d0 [ 56.572053][ T7101] RDX: 0000000000000000 RSI: ffffffff864ad5ed RDI: 0000000000000000 [ 56.580027][ T7101] RBP: ffffc90001837900 R08: ffff88808ddb8300 R09: fffffbfff185cd54 [ 56.587971][ T7101] R10: ffffffff8c2e6a9f R11: fffffbfff185cd53 R12: 0000000000000400 [ 56.596870][ T7101] R13: dffffc0000000000 R14: ffff888089560000 R15: ffffc900018379d0 [ 56.604828][ T7101] FS: 0000000001aef880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 56.613740][ T7101] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.620297][ T7101] CR2: 0000000020000080 CR3: 0000000094d97000 CR4: 00000000001406e0 [ 56.628263][ T7101] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.636219][ T7101] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.644161][ T7101] Call Trace: [ 56.647429][ T7101] ? drop_func+0x60/0x60 [ 56.651645][ T7101] ? rwlock_bug.part.0+0x90/0x90 [ 56.656666][ T7101] ? rcu_read_lock_bh_held+0x5a/0xb0 [ 56.661945][ T7101] ? rcu_read_lock_sched_held+0xd0/0xd0 [ 56.667485][ T7101] __dev_queue_xmit+0x154a/0x30a0 [ 56.672514][ T7101] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 56.678727][ T7101] ? _copy_from_iter+0x2a0/0xb60 [ 56.683640][ T7101] ? __phys_addr_symbol+0x2c/0x70 [ 56.688641][ T7101] ? __check_object_size+0x171/0x437 [ 56.693904][ T7101] ? packet_parse_headers.isra.0+0x117/0x470 [ 56.699859][ T7101] ? __unregister_prot_hook+0x320/0x320 [ 56.705379][ T7101] ? packet_sendmsg+0x23cc/0x5ce0 [ 56.710394][ T7101] packet_sendmsg+0x23cc/0x5ce0 [ 56.715225][ T7101] ? mark_held_locks+0xe0/0xe0 [ 56.719977][ T7101] ? aa_label_sk_perm+0x89/0xe0 [ 56.724812][ T7101] ? aa_sk_perm+0x319/0xab0 [ 56.729290][ T7101] ? packet_notifier+0x860/0x860 [ 56.734200][ T7101] ? aa_af_perm+0x260/0x260 [ 56.738675][ T7101] ? packet_do_bind+0x452/0xc00 [ 56.743500][ T7101] ? packet_notifier+0x860/0x860 [ 56.748417][ T7101] sock_sendmsg+0xcf/0x120 [ 56.752806][ T7101] __sys_sendto+0x220/0x330 [ 56.757281][ T7101] ? __ia32_sys_getpeername+0xb0/0xb0 [ 56.762625][ T7101] ? packet_do_bind+0x452/0xc00 [ 56.767456][ T7101] ? __sys_bind+0x13e/0x250 [ 56.771942][ T7101] ? __ia32_sys_socketpair+0xf0/0xf0 [ 56.777205][ T7101] ? sock_create_kern+0x40/0x40 [ 56.782033][ T7101] ? fpregs_mark_activate+0x320/0x320 [ 56.787399][ T7101] __x64_sys_sendto+0xdd/0x1b0 [ 56.792160][ T7101] ? lockdep_hardirqs_on+0x463/0x620 [ 56.797433][ T7101] do_syscall_64+0xf6/0x7d0 [ 56.801992][ T7101] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 56.807873][ T7101] RIP: 0033:0x4404e9 [ 56.811746][ T7101] 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 [ 56.831329][ T7101] RSP: 002b:00007fff7b5e18b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 56.839736][ T7101] RAX: ffffffffffffffda RBX: 00000000004a167e RCX: 00000000004404e9 [ 56.847682][ T7101] RDX: 00000000000001e8 RSI: 0000000020000480 RDI: 0000000000000005 [ 56.855661][ T7101] RBP: 54c6c2ff093a6d32 R08: 0000000000000000 R09: 0000000000000000 [ 56.863617][ T7101] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000010000 [ 56.871579][ T7101] R13: 0000000000401e00 R14: 0000000000000000 R15: 0000000000000000 [ 56.879665][ T7101] Modules linked in: [ 56.883626][ T7101] ---[ end trace 61478c13c5e6e949 ]--- [ 56.889119][ T7101] RIP: 0010:fq_codel_enqueue+0xa75/0x11b0 [ 56.894832][ T7101] Code: 28 fb 44 3b 64 24 70 0f 83 dd 00 00 00 e8 13 5e 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 [ 56.915441][ T7101] RSP: 0018:ffffc900018377f0 EFLAGS: 00010246 [ 56.921560][ T7101] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900018379d0 [ 56.929581][ T7101] RDX: 0000000000000000 RSI: ffffffff864ad5ed RDI: 0000000000000000 [ 56.937586][ T7101] RBP: ffffc90001837900 R08: ffff88808ddb8300 R09: fffffbfff185cd54 [ 56.945606][ T7101] R10: ffffffff8c2e6a9f R11: fffffbfff185cd53 R12: 0000000000000400 [ 56.953638][ T7101] R13: dffffc0000000000 R14: ffff888089560000 R15: ffffc900018379d0 [ 56.961660][ T7101] FS: 0000000001aef880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 56.970638][ T7101] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.977213][ T7101] CR2: 0000000020000080 CR3: 0000000094d97000 CR4: 00000000001406e0 [ 56.985208][ T7101] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.993210][ T7101] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.001306][ T7101] Kernel panic - not syncing: Fatal exception in interrupt [ 57.009717][ T7101] Kernel Offset: disabled [ 57.014040][ T7101] Rebooting in 86400 seconds..