[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 51.807225][ T27] audit: type=1800 audit(1566264509.650:25): pid=8348 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 51.850898][ T27] audit: type=1800 audit(1566264509.650:26): pid=8348 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 51.891109][ T27] audit: type=1800 audit(1566264509.650:27): pid=8348 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.17' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 63.502306][ T8502] IPVS: ftp: loaded support on port[0] = 21 [ 63.558121][ T8510] ------------[ cut here ]------------ [ 63.563655][ T8510] kernel BUG at include/linux/skbuff.h:2233! [ 63.569651][ T8510] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 63.575704][ T8510] CPU: 1 PID: 8510 Comm: syz-executor771 Not tainted 5.3.0-rc5-next-20190819 #68 [ 63.584772][ T8510] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.594822][ T8510] RIP: 0010:skb_pull+0xea/0x110 [ 63.599652][ T8510] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 4c ad d9 fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 36 ad d9 fb <0f> 0b e8 df 9c 14 fc e9 44 ff ff ff e8 d5 9c 14 fc eb 8a e8 ee 9c [ 63.619226][ T8510] RSP: 0018:ffff88808c996e50 EFLAGS: 00010293 [ 63.625261][ T8510] RAX: ffff888090858280 RBX: 0000000000000004 RCX: ffffffff859883e6 [ 63.633202][ T8510] RDX: 0000000000000000 RSI: ffffffff8598843a RDI: 0000000000000004 [ 63.641145][ T8510] RBP: ffff88808c996e70 R08: ffff888090858280 R09: fffffbfff14ef333 [ 63.649088][ T8510] R10: fffffbfff14ef332 R11: ffffffff8a779997 R12: 0000000090f73dcc [ 63.657027][ T8510] R13: ffff88808c9974c0 R14: 00000000ffff8880 R15: ffff88808c9974c0 [ 63.664972][ T8510] FS: 00005555564a0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 63.673871][ T8510] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.680422][ T8510] CR2: 0000000020000040 CR3: 000000008b2bd000 CR4: 00000000001406e0 [ 63.688388][ T8510] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.696330][ T8510] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.704267][ T8510] Call Trace: [ 63.707528][ T8510] ? __kasan_check_read+0x11/0x20 [ 63.712521][ T8510] sctp_inq_pop+0x2f1/0xd80 [ 63.717006][ T8510] sctp_endpoint_bh_rcv+0x184/0x8d0 [ 63.722175][ T8510] ? sctp_endpoint_lookup_assoc+0x290/0x290 [ 63.728038][ T8510] ? rwlock_bug.part.0+0x90/0x90 [ 63.732946][ T8510] ? lock_acquire+0x190/0x410 [ 63.737602][ T8510] sctp_inq_push+0x1e4/0x280 [ 63.742172][ T8510] sctp_rcv+0x2807/0x3590 [ 63.746473][ T8510] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.752771][ T8510] ? sctp_addrs_lookup_transport+0x7a0/0x7a0 [ 63.758718][ T8510] ? __kasan_check_read+0x11/0x20 [ 63.763712][ T8510] ? mark_lock+0xc2/0x1220 [ 63.768109][ T8510] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.774349][ T8510] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 63.780486][ T8510] ? rcu_read_lock_held+0x9c/0xb0 [ 63.785492][ T8510] sctp6_rcv+0x17/0x30 [ 63.789536][ T8510] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 63.795142][ T8510] ip6_input_finish+0x84/0x170 [ 63.799871][ T8510] ip6_input+0xe4/0x3f0 [ 63.803998][ T8510] ? ip6_input_finish+0x170/0x170 [ 63.808992][ T8510] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 63.815127][ T8510] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 63.821006][ T8510] ? rcu_read_lock_held_common+0x130/0x130 [ 63.826780][ T8510] ip6_sublist_rcv_finish+0x98/0x1e0 [ 63.832069][ T8510] ip6_sublist_rcv+0x80c/0xcf0 [ 63.836822][ T8510] ? ip6_rcv_finish+0x2f0/0x2f0 [ 63.841645][ T8510] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 63.847503][ T8510] ? ip6_rcv_core.isra.0+0x1011/0x1bb0 [ 63.852947][ T8510] ipv6_list_rcv+0x373/0x4b0 [ 63.857509][ T8510] ? __kasan_check_read+0x11/0x20 [ 63.862502][ T8510] ? ipv6_rcv+0x420/0x420 [ 63.866802][ T8510] ? __lock_acquire+0x8a1/0x4e70 [ 63.871722][ T8510] ? __kasan_check_read+0x11/0x20 [ 63.876722][ T8510] ? ipv6_rcv+0x420/0x420 [ 63.881026][ T8510] __netif_receive_skb_list_core+0x5fc/0x9d0 [ 63.886979][ T8510] ? ktime_get_with_offset+0x13a/0x350 [ 63.892403][ T8510] ? ktime_get_with_offset+0x13a/0x350 [ 63.897837][ T8510] ? process_backlog+0x750/0x750 [ 63.902744][ T8510] ? lock_acquire+0x190/0x410 [ 63.907396][ T8510] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.913615][ T8510] ? __kasan_check_read+0x11/0x20 [ 63.918615][ T8510] netif_receive_skb_list_internal+0x7eb/0xe60 [ 63.924751][ T8510] ? __netif_receive_skb_list_core+0x9d0/0x9d0 [ 63.930884][ T8510] ? __kasan_check_read+0x11/0x20 [ 63.935880][ T8510] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 63.942093][ T8510] ? eth_gro_receive+0x890/0x890 [ 63.946999][ T8510] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.952954][ T8510] gro_normal_list.part.0+0x1e/0xb0 [ 63.958296][ T8510] napi_gro_frags+0xa6a/0xea0 [ 63.962943][ T8510] tun_get_user+0x2e98/0x3fa0 [ 63.967590][ T8510] ? __kasan_check_read+0x11/0x20 [ 63.972584][ T8510] ? __lock_acquire+0x8a1/0x4e70 [ 63.977497][ T8510] ? tun_build_skb.isra.0+0x1390/0x1390 [ 63.983017][ T8510] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.989322][ T8510] ? __kasan_check_read+0x11/0x20 [ 63.994330][ T8510] tun_chr_write_iter+0xbd/0x156 [ 63.999237][ T8510] do_iter_readv_writev+0x5f8/0x8f0 [ 64.004400][ T8510] ? no_seek_end_llseek_size+0x70/0x70 [ 64.009829][ T8510] ? apparmor_file_permission+0x25/0x30 [ 64.015348][ T8510] ? rw_verify_area+0x126/0x360 [ 64.020170][ T8510] do_iter_write+0x17b/0x380 [ 64.024726][ T8510] vfs_writev+0x1b3/0x2f0 [ 64.029022][ T8510] ? vfs_iter_write+0xb0/0xb0 [ 64.033669][ T8510] ? find_held_lock+0x35/0x130 [ 64.038405][ T8510] ? __do_page_fault+0x56a/0xdd0 [ 64.043329][ T8510] ? lock_downgrade+0x920/0x920 [ 64.048152][ T8510] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.054361][ T8510] ? __fget_light+0x1a9/0x230 [ 64.059010][ T8510] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.065217][ T8510] do_writev+0x15b/0x330 [ 64.069441][ T8510] ? vfs_writev+0x2f0/0x2f0 [ 64.073917][ T8510] ? do_syscall_64+0x26/0x760 [ 64.078562][ T8510] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.084599][ T8510] ? do_syscall_64+0x26/0x760 [ 64.089250][ T8510] __x64_sys_writev+0x75/0xb0 [ 64.093899][ T8510] do_syscall_64+0xfa/0x760 [ 64.098380][ T8510] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.104242][ T8510] RIP: 0033:0x441b10 [ 64.108107][ T8510] Code: 05 48 3d 01 f0 ff ff 0f 83 5d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 01 95 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00 [ 64.127676][ T8510] RSP: 002b:00007ffeb0a03a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 64.136056][ T8510] RAX: ffffffffffffffda RBX: 00007ffeb0a03a50 RCX: 0000000000441b10 [ 64.144014][ T8510] RDX: 0000000000000001 RSI: 00007ffeb0a03a80 RDI: 00000000000000f0 [ 64.151973][ T8510] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 64.159943][ T8510] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000f836 [ 64.167888][ T8510] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000 [ 64.175847][ T8510] Modules linked in: [ 64.179762][ T8510] ---[ end trace 4e77b171b14ea1f1 ]--- [ 64.185224][ T8510] RIP: 0010:skb_pull+0xea/0x110 [ 64.190054][ T8510] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 4c ad d9 fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 36 ad d9 fb <0f> 0b e8 df 9c 14 fc e9 44 ff ff ff e8 d5 9c 14 fc eb 8a e8 ee 9c [ 64.209661][ T8510] RSP: 0018:ffff88808c996e50 EFLAGS: 00010293 [ 64.215720][ T8510] RAX: ffff888090858280 RBX: 0000000000000004 RCX: ffffffff859883e6 [ 64.223770][ T8510] RDX: 0000000000000000 RSI: ffffffff8598843a RDI: 0000000000000004 [ 64.231736][ T8510] RBP: ffff88808c996e70 R08: ffff888090858280 R09: fffffbfff14ef333 [ 64.239681][ T8510] R10: fffffbfff14ef332 R11: ffffffff8a779997 R12: 0000000090f73dcc [ 64.247647][ T8510] R13: ffff88808c9974c0 R14: 00000000ffff8880 R15: ffff88808c9974c0 [ 64.255618][ T8510] FS: 00005555564a0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 64.264545][ T8510] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.271124][ T8510] CR2: 0000000020000040 CR3: 000000008b2bd000 CR4: 00000000001406e0 [ 64.279175][ T8510] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.287157][ T8510] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.295124][ T8510] Kernel panic - not syncing: Fatal exception in interrupt [ 64.302974][ T8510] Kernel Offset: disabled [ 64.307289][ T8510] Rebooting in 86400 seconds..