[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.777733][ T26] audit: type=1800 audit(1565971647.586:25): pid=8866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.819040][ T26] audit: type=1800 audit(1565971647.586:26): pid=8866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.864038][ T26] audit: type=1800 audit(1565971647.586:27): pid=8866 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 '10.128.0.144' (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: [ 74.413502][ T9022] IPVS: ftp: loaded support on port[0] = 21 [ 74.476658][ T9030] ------------[ cut here ]------------ [ 74.482194][ T9030] kernel BUG at include/linux/skbuff.h:2225! [ 74.488239][ T9030] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 74.494309][ T9030] CPU: 0 PID: 9030 Comm: syz-executor649 Not tainted 5.3.0-rc3+ #134 [ 74.502457][ T9030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.512515][ T9030] RIP: 0010:skb_pull+0xea/0x110 [ 74.517355][ T9030] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 9c e5 dd fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 86 e5 dd fb <0f> 0b e8 df 13 18 fc e9 44 ff ff ff e8 d5 13 18 fc eb 8a e8 ee 13 [ 74.536963][ T9030] RSP: 0018:ffff88808ac96e10 EFLAGS: 00010293 [ 74.543019][ T9030] RAX: ffff88809c546000 RBX: 0000000000000004 RCX: ffffffff8594a3a6 [ 74.550977][ T9030] RDX: 0000000000000000 RSI: ffffffff8594a3fa RDI: 0000000000000004 [ 74.559481][ T9030] RBP: ffff88808ac96e30 R08: ffff88809c546000 R09: fffffbfff14a8f4f [ 74.567437][ T9030] R10: fffffbfff14a8f4e R11: ffffffff8a547a77 R12: 0000000095e28bcc [ 74.575393][ T9030] R13: ffff88808ac97478 R14: 00000000ffff8880 R15: ffff88808ac97478 [ 74.583353][ T9030] FS: 0000555556549880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 74.592265][ T9030] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.598831][ T9030] CR2: 0000000020000100 CR3: 0000000089c3c000 CR4: 00000000001406f0 [ 74.606800][ T9030] Call Trace: [ 74.610079][ T9030] sctp_inq_pop+0x2f1/0xd80 [ 74.614568][ T9030] sctp_endpoint_bh_rcv+0x184/0x8d0 [ 74.619746][ T9030] ? sctp_endpoint_lookup_assoc+0x290/0x290 [ 74.625622][ T9030] ? rwlock_bug.part.0+0x90/0x90 [ 74.630545][ T9030] ? lock_acquire+0x190/0x410 [ 74.635205][ T9030] sctp_inq_push+0x1e4/0x280 [ 74.639798][ T9030] sctp_rcv+0x2807/0x3590 [ 74.644121][ T9030] ? sctp_addrs_lookup_transport+0x7a0/0x7a0 [ 74.650082][ T9030] ? __kasan_check_read+0x11/0x20 [ 74.655121][ T9030] ? mark_lock+0xc0/0x11e0 [ 74.659521][ T9030] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 74.665745][ T9030] ? raw6_local_deliver+0x5f9/0xae0 [ 74.670933][ T9030] sctp6_rcv+0x17/0x30 [ 74.675003][ T9030] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 74.680623][ T9030] ip6_input_finish+0x84/0x170 [ 74.685368][ T9030] ip6_input+0xe4/0x3f0 [ 74.689523][ T9030] ? ip6_input_finish+0x170/0x170 [ 74.694540][ T9030] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 74.700505][ T9030] ip6_sublist_rcv_finish+0x98/0x1e0 [ 74.705804][ T9030] ip6_sublist_rcv+0x80c/0xcf0 [ 74.710651][ T9030] ? ip6_rcv_finish+0x2f0/0x2f0 [ 74.715489][ T9030] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 74.721376][ T9030] ? ip6_rcv_core.isra.0+0x1011/0x1bb0 [ 74.726819][ T9030] ipv6_list_rcv+0x373/0x4b0 [ 74.731403][ T9030] ? ipv6_rcv+0x420/0x420 [ 74.735713][ T9030] ? ipv6_rcv+0x420/0x420 [ 74.740025][ T9030] __netif_receive_skb_list_core+0x5fc/0x9d0 [ 74.746007][ T9030] ? ktime_get_with_offset+0x13a/0x350 [ 74.751491][ T9030] ? ktime_get_with_offset+0x13a/0x350 [ 74.756952][ T9030] ? process_backlog+0x750/0x750 [ 74.761899][ T9030] ? lock_acquire+0x190/0x410 [ 74.766559][ T9030] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.772781][ T9030] ? __kasan_check_read+0x11/0x20 [ 74.777788][ T9030] netif_receive_skb_list_internal+0x7eb/0xe60 [ 74.783940][ T9030] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.790167][ T9030] ? __netif_receive_skb_list_core+0x9d0/0x9d0 [ 74.796329][ T9030] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 74.802577][ T9030] ? eth_gro_receive+0x890/0x890 [ 74.807501][ T9030] gro_normal_list.part.0+0x1e/0xb0 [ 74.812680][ T9030] napi_gro_frags+0xa6a/0xea0 [ 74.817344][ T9030] tun_get_user+0x2e98/0x3fa0 [ 74.822005][ T9030] ? __kasan_check_read+0x11/0x20 [ 74.827025][ T9030] ? tun_build_skb.isra.0+0x1390/0x1390 [ 74.832571][ T9030] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.838803][ T9030] ? __kasan_check_read+0x11/0x20 [ 74.843822][ T9030] tun_chr_write_iter+0xbd/0x156 [ 74.848748][ T9030] do_iter_readv_writev+0x5f8/0x8f0 [ 74.853963][ T9030] ? no_seek_end_llseek_size+0x70/0x70 [ 74.859414][ T9030] ? apparmor_file_permission+0x25/0x30 [ 74.864970][ T9030] ? rw_verify_area+0x126/0x360 [ 74.869802][ T9030] do_iter_write+0x184/0x610 [ 74.874373][ T9030] ? dup_iter+0x250/0x250 [ 74.878687][ T9030] vfs_writev+0x1b3/0x2f0 [ 74.882997][ T9030] ? vfs_iter_write+0xb0/0xb0 [ 74.887653][ T9030] ? find_held_lock+0x35/0x130 [ 74.892419][ T9030] ? __do_page_fault+0x56a/0xdd0 [ 74.897352][ T9030] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.903572][ T9030] ? __fget_light+0x1a9/0x230 [ 74.908253][ T9030] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.914495][ T9030] do_writev+0x15b/0x330 [ 74.918717][ T9030] ? vfs_writev+0x2f0/0x2f0 [ 74.923238][ T9030] ? do_syscall_64+0x26/0x6a0 [ 74.927928][ T9030] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.933996][ T9030] ? do_syscall_64+0x26/0x6a0 [ 74.938661][ T9030] __x64_sys_writev+0x75/0xb0 [ 74.943325][ T9030] do_syscall_64+0xfd/0x6a0 [ 74.947815][ T9030] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.953687][ T9030] RIP: 0033:0x441b10 [ 74.957564][ T9030] 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 [ 74.977241][ T9030] RSP: 002b:00007ffe63706b88 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 74.986472][ T9030] RAX: ffffffffffffffda RBX: 00007ffe63706ba0 RCX: 0000000000441b10 [ 74.994433][ T9030] RDX: 0000000000000001 RSI: 00007ffe63706bd0 RDI: 00000000000000f0 [ 75.002397][ T9030] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 75.010360][ T9030] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000122cb [ 75.018334][ T9030] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000 [ 75.026382][ T9030] Modules linked in: [ 75.030310][ T9030] ---[ end trace c37566c1c02066db ]--- [ 75.035773][ T9030] RIP: 0010:skb_pull+0xea/0x110 [ 75.040840][ T9030] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 9c e5 dd fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 86 e5 dd fb <0f> 0b e8 df 13 18 fc e9 44 ff ff ff e8 d5 13 18 fc eb 8a e8 ee 13 [ 75.060477][ T9030] RSP: 0018:ffff88808ac96e10 EFLAGS: 00010293 [ 75.066527][ T9030] RAX: ffff88809c546000 RBX: 0000000000000004 RCX: ffffffff8594a3a6 [ 75.074551][ T9030] RDX: 0000000000000000 RSI: ffffffff8594a3fa RDI: 0000000000000004 [ 75.082544][ T9030] RBP: ffff88808ac96e30 R08: ffff88809c546000 R09: fffffbfff14a8f4f [ 75.090564][ T9030] R10: fffffbfff14a8f4e R11: ffffffff8a547a77 R12: 0000000095e28bcc [ 75.098541][ T9030] R13: ffff88808ac97478 R14: 00000000ffff8880 R15: ffff88808ac97478 [ 75.106659][ T9030] FS: 0000555556549880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 75.115672][ T9030] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.122313][ T9030] CR2: 0000000020000100 CR3: 0000000089c3c000 CR4: 00000000001406f0 [ 75.130339][ T9030] Kernel panic - not syncing: Fatal exception in interrupt [ 75.138738][ T9030] Kernel Offset: disabled [ 75.143070][ T9030] Rebooting in 86400 seconds..