Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.250' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.764105][ T8478] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 73.775952][ T8478] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 73.784541][ T8478] CPU: 1 PID: 8478 Comm: syz-executor833 Not tainted 5.11.0-rc6-syzkaller #0 [ 73.794182][ T8478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.804258][ T8478] RIP: 0010:fq_codel_enqueue+0x8a3/0x10c0 [ 73.810001][ T8478] Code: 33 81 4d fa 45 39 ec 0f 83 cb 00 00 00 e8 85 7b 4d fa 48 8b 44 24 10 80 38 00 0f 85 32 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 06 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48 [ 73.829625][ T8478] RSP: 0018:ffffc9000173f600 EFLAGS: 00010246 [ 73.835704][ T8478] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 73.843818][ T8478] RDX: 0000000000000000 RSI: ffffffff8725426b RDI: 0000000000000003 [ 73.851959][ T8478] RBP: ffffc9000173f798 R08: 0000000000000400 R09: 0000000000000001 [ 73.859985][ T8478] R10: ffffffff872541cb R11: 0000000000000000 R12: 0000000000000400 [ 73.868049][ T8478] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880268e0000 [ 73.876903][ T8478] FS: 0000000001464300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 73.887760][ T8478] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.894394][ T8478] CR2: 0000000020000080 CR3: 0000000027ef8000 CR4: 00000000001506e0 [ 73.902396][ T8478] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.910401][ T8478] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.918583][ T8478] Call Trace: [ 73.922221][ T8478] ? do_raw_spin_lock+0x120/0x2b0 [ 73.927431][ T8478] ? INET_ECN_set_ce+0x780/0x780 [ 73.932389][ T8478] ? rwlock_bug.part.0+0x90/0x90 [ 73.937795][ T8478] __dev_queue_xmit+0x1913/0x2dd0 [ 73.942911][ T8478] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 73.948207][ T8478] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 73.953922][ T8478] ? skb_release_data+0x90/0x910 [ 73.958856][ T8478] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.965141][ T8478] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 73.971419][ T8478] ? skb_headers_offset_update+0x12e/0x260 [ 73.977238][ T8478] ? pskb_expand_head+0x58a/0x1040 [ 73.982472][ T8478] __bpf_redirect+0x52e/0xc60 [ 73.987186][ T8478] ? skb_ensure_writable+0xdc/0x450 [ 73.992382][ T8478] bpf_clone_redirect+0x2ae/0x420 [ 73.997448][ T8478] bpf_prog_cc75667d52cf7bb0+0x56/0xfdc [ 74.002986][ T8478] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 74.009079][ T8478] ? __build_skb+0x21/0x60 [ 74.013500][ T8478] ? build_skb+0x1c/0x190 [ 74.017828][ T8478] ? bpf_prog_test_run_skb+0x347/0x1c50 [ 74.023983][ T8478] ? find_held_lock+0x2d/0x110 [ 74.028764][ T8478] ? bpf_test_run+0x18c/0xcc0 [ 74.033541][ T8478] ? lock_downgrade+0x6d0/0x6d0 [ 74.038386][ T8478] ? lock_release+0x710/0x710 [ 74.043074][ T8478] ? ktime_get+0x1bf/0x1e0 [ 74.047591][ T8478] ? lockdep_hardirqs_on+0x79/0x100 [ 74.052799][ T8478] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 74.058625][ T8478] ? ktime_get+0x167/0x1e0 [ 74.063069][ T8478] bpf_test_run+0x3f2/0xcc0 [ 74.067928][ T8478] ? eth_type_trans+0x360/0x690 [ 74.072781][ T8478] ? __bpf_prog_test_run_raw_tp+0x460/0x460 [ 74.079046][ T8478] ? __build_skb+0x53/0x60 [ 74.083475][ T8478] bpf_prog_test_run_skb+0xabc/0x1c50 [ 74.089239][ T8478] ? bpf_prog_test_run_raw_tp+0x640/0x640 [ 74.094962][ T8478] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.101486][ T8478] ? __fget_light+0x215/0x280 [ 74.106165][ T8478] ? __do_sys_bpf+0x1e10/0x4f10 [ 74.111371][ T8478] ? bpf_prog_test_run_raw_tp+0x640/0x640 [ 74.117132][ T8478] __do_sys_bpf+0x1ea9/0x4f10 [ 74.121826][ T8478] ? bpf_link_get_from_fd+0x110/0x110 [ 74.127207][ T8478] ? lock_downgrade+0x6d0/0x6d0 [ 74.132059][ T8478] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.138428][ T8478] ? __fget_light+0x215/0x280 [ 74.143198][ T8478] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.149443][ T8478] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.155780][ T8478] ? __sys_sendmsg+0x10c/0x1b0 [ 74.160580][ T8478] ? __sys_sendmsg_sock+0xb0/0xb0 [ 74.165795][ T8478] ? syscall_enter_from_user_mode+0x1d/0x50 [ 74.171684][ T8478] do_syscall_64+0x2d/0x70 [ 74.176094][ T8478] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.182007][ T8478] RIP: 0033:0x43f3b9 [ 74.186417][ T8478] 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 [ 74.206902][ T8478] RSP: 002b:00007ffef432cdc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 74.215418][ T8478] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043f3b9 [ 74.223491][ T8478] RDX: 0000000000000048 RSI: 0000000020000140 RDI: 000000000000000a [ 74.231587][ T8478] RBP: 00000000004033a0 R08: 0000000000400488 R09: 0000000000400488 [ 74.239561][ T8478] R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000403430 [ 74.247793][ T8478] R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488 [ 74.255793][ T8478] Modules linked in: [ 74.259825][ T8478] ---[ end trace 05d1fb44d043e92f ]--- [ 74.265405][ T8478] RIP: 0010:fq_codel_enqueue+0x8a3/0x10c0 [ 74.271280][ T8478] Code: 33 81 4d fa 45 39 ec 0f 83 cb 00 00 00 e8 85 7b 4d fa 48 8b 44 24 10 80 38 00 0f 85 32 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 06 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48 [ 74.291523][ T8478] RSP: 0018:ffffc9000173f600 EFLAGS: 00010246 [ 74.297695][ T8478] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 74.305891][ T8478] RDX: 0000000000000000 RSI: ffffffff8725426b RDI: 0000000000000003 [ 74.314001][ T8478] RBP: ffffc9000173f798 R08: 0000000000000400 R09: 0000000000000001 [ 74.322022][ T8478] R10: ffffffff872541cb R11: 0000000000000000 R12: 0000000000000400 [ 74.330211][ T8478] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880268e0000 [ 74.338383][ T8478] FS: 0000000001464300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 74.347375][ T8478] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.354039][ T8478] CR2: 0000000020000080 CR3: 0000000027ef8000 CR4: 00000000001506e0 [ 74.362971][ T8478] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.372078][ T8478] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.380232][ T8478] Kernel panic - not syncing: Fatal exception in interrupt [ 74.388202][ T8478] Kernel Offset: disabled [ 74.392540][ T8478] Rebooting in 86400 seconds..