[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.181487][ T27] audit: type=1800 audit(1565970199.171:25): pid=8747 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.226497][ T27] audit: type=1800 audit(1565970199.171:26): pid=8747 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.273890][ T27] audit: type=1800 audit(1565970199.171:27): pid=8747 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 '10.128.0.151' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 69.121845][ T8900] IPVS: ftp: loaded support on port[0] = 21 executing program [ 69.186608][ T8908] ------------[ cut here ]------------ [ 69.192274][ T8908] kernel BUG at include/linux/skbuff.h:2233! [ 69.198303][ T8908] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 69.204447][ T8908] CPU: 1 PID: 8908 Comm: syz-executor079 Not tainted 5.3.0-rc4-next-20190814 #66 [ 69.213671][ T8908] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.223726][ T8908] RIP: 0010:skb_pull+0xea/0x110 [ 69.228555][ T8908] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 4c 7c db fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 36 7c db fb <0f> 0b e8 3f 59 16 fc e9 44 ff ff ff e8 35 59 16 fc eb 8a e8 4e 59 [ 69.248224][ T8908] RSP: 0018:ffff888091b06e50 EFLAGS: 00010293 [ 69.254910][ T8908] RAX: ffff88809334a640 RBX: 0000000000000004 RCX: ffffffff8596b3c6 [ 69.263253][ T8908] RDX: 0000000000000000 RSI: ffffffff8596b41a RDI: 0000000000000004 [ 69.271313][ T8908] RBP: ffff888091b06e70 R08: ffff88809334a640 R09: fffffbfff14ee533 [ 69.279624][ T8908] R10: fffffbfff14ee532 R11: ffffffff8a772997 R12: 00000000a0c44c0c [ 69.288099][ T8908] R13: ffff888091b074c0 R14: 00000000ffff8880 R15: ffff888091b074c0 [ 69.296137][ T8908] FS: 0000555555f24880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 69.305274][ T8908] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.312217][ T8908] CR2: 0000000020000100 CR3: 000000009f9b4000 CR4: 00000000001406e0 [ 69.320207][ T8908] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.328161][ T8908] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.336415][ T8908] Call Trace: [ 69.339719][ T8908] ? __kasan_check_read+0x11/0x20 [ 69.344736][ T8908] sctp_inq_pop+0x2f1/0xd80 [ 69.349220][ T8908] sctp_endpoint_bh_rcv+0x184/0x8d0 [ 69.355186][ T8908] ? sctp_endpoint_lookup_assoc+0x290/0x290 [ 69.364078][ T8908] ? rwlock_bug.part.0+0x90/0x90 [ 69.369356][ T8908] ? lock_acquire+0x190/0x410 [ 69.374111][ T8908] sctp_inq_push+0x1e4/0x280 [ 69.378818][ T8908] sctp_rcv+0x2807/0x3590 [ 69.383399][ T8908] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.390797][ T8908] ? sctp_addrs_lookup_transport+0x7a0/0x7a0 [ 69.396969][ T8908] ? __kasan_check_read+0x11/0x20 [ 69.402087][ T8908] ? mark_lock+0xc2/0x1220 [ 69.406870][ T8908] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.413426][ T8908] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 69.420479][ T8908] ? rcu_read_lock_held+0x9c/0xb0 [ 69.425890][ T8908] sctp6_rcv+0x17/0x30 [ 69.430299][ T8908] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 69.436810][ T8908] ip6_input_finish+0x84/0x170 [ 69.444512][ T8908] ip6_input+0xe4/0x3f0 [ 69.449132][ T8908] ? ip6_input_finish+0x170/0x170 [ 69.454435][ T8908] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 69.461109][ T8908] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 69.467348][ T8908] ? rcu_read_lock_held_common+0x130/0x130 [ 69.476082][ T8908] ip6_sublist_rcv_finish+0x98/0x1e0 [ 69.482083][ T8908] ip6_sublist_rcv+0x80c/0xcf0 [ 69.487472][ T8908] ? ip6_rcv_finish+0x2f0/0x2f0 [ 69.492326][ T8908] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 69.498767][ T8908] ? ip6_rcv_core.isra.0+0x1011/0x1bb0 [ 69.504572][ T8908] ipv6_list_rcv+0x373/0x4b0 [ 69.509439][ T8908] ? __kasan_check_read+0x11/0x20 [ 69.522658][ T8908] ? ipv6_rcv+0x420/0x420 [ 69.526983][ T8908] ? __lock_acquire+0x8a1/0x4e70 [ 69.532082][ T8908] ? __kasan_check_read+0x11/0x20 [ 69.537091][ T8908] ? ipv6_rcv+0x420/0x420 [ 69.541599][ T8908] __netif_receive_skb_list_core+0x5fc/0x9d0 [ 69.547562][ T8908] ? ktime_get_with_offset+0x13a/0x350 [ 69.553402][ T8908] ? ktime_get_with_offset+0x13a/0x350 [ 69.559121][ T8908] ? process_backlog+0x750/0x750 [ 69.564950][ T8908] ? lock_acquire+0x190/0x410 [ 69.570314][ T8908] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.577733][ T8908] ? __kasan_check_read+0x11/0x20 [ 69.582847][ T8908] netif_receive_skb_list_internal+0x7eb/0xe60 [ 69.589357][ T8908] ? __netif_receive_skb_list_core+0x9d0/0x9d0 [ 69.595502][ T8908] ? __kasan_check_read+0x11/0x20 [ 69.601454][ T8908] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 69.608665][ T8908] ? eth_gro_receive+0x890/0x890 [ 69.614156][ T8908] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.624837][ T8908] gro_normal_list.part.0+0x1e/0xb0 [ 69.630794][ T8908] napi_gro_frags+0xa6a/0xea0 [ 69.637119][ T8908] tun_get_user+0x2e98/0x3fa0 [ 69.642145][ T8908] ? __kasan_check_read+0x11/0x20 [ 69.647250][ T8908] ? __lock_acquire+0x8a1/0x4e70 [ 69.658316][ T8908] ? tun_build_skb.isra.0+0x1390/0x1390 [ 69.664417][ T8908] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.672173][ T8908] ? __kasan_check_read+0x11/0x20 [ 69.677826][ T8908] tun_chr_write_iter+0xbd/0x156 [ 69.683461][ T8908] do_iter_readv_writev+0x5f8/0x8f0 [ 69.688998][ T8908] ? no_seek_end_llseek_size+0x70/0x70 [ 69.694741][ T8908] ? apparmor_file_permission+0x25/0x30 [ 69.700680][ T8908] ? rw_verify_area+0x126/0x360 [ 69.705512][ T8908] do_iter_write+0x17b/0x380 [ 69.712191][ T8908] vfs_writev+0x1b3/0x2f0 [ 69.718216][ T8908] ? vfs_iter_write+0xb0/0xb0 [ 69.723072][ T8908] ? find_held_lock+0x35/0x130 [ 69.727878][ T8908] ? __do_page_fault+0x56a/0xdd0 [ 69.733369][ T8908] ? lock_downgrade+0x920/0x920 [ 69.739189][ T8908] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.746131][ T8908] ? __fget_light+0x1a9/0x230 [ 69.751144][ T8908] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.757662][ T8908] do_writev+0x15b/0x330 [ 69.761917][ T8908] ? vfs_writev+0x2f0/0x2f0 [ 69.766422][ T8908] ? do_syscall_64+0x26/0x760 [ 69.771084][ T8908] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.779149][ T8908] ? do_syscall_64+0x26/0x760 [ 69.783809][ T8908] __x64_sys_writev+0x75/0xb0 [ 69.788467][ T8908] do_syscall_64+0xfa/0x760 [ 69.792950][ T8908] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.798816][ T8908] RIP: 0033:0x441b10 [ 69.802687][ T8908] 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 [ 69.822813][ T8908] RSP: 002b:00007ffebe221be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 69.831623][ T8908] RAX: ffffffffffffffda RBX: 00007ffebe221c00 RCX: 0000000000441b10 [ 69.840279][ T8908] RDX: 0000000000000001 RSI: 00007ffebe221c30 RDI: 00000000000000f0 [ 69.848227][ T8908] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 69.856552][ T8908] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000010e27 [ 69.866420][ T8908] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000 [ 69.875173][ T8908] Modules linked in: [ 69.879108][ T8908] ---[ end trace fb408ae2bfaaf984 ]--- [ 69.884568][ T8908] RIP: 0010:skb_pull+0xea/0x110 [ 69.889527][ T8908] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 4c 7c db fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 36 7c db fb <0f> 0b e8 3f 59 16 fc e9 44 ff ff ff e8 35 59 16 fc eb 8a e8 4e 59 [ 69.909806][ T8908] RSP: 0018:ffff888091b06e50 EFLAGS: 00010293 [ 69.916510][ T8908] RAX: ffff88809334a640 RBX: 0000000000000004 RCX: ffffffff8596b3c6 [ 69.924907][ T8908] RDX: 0000000000000000 RSI: ffffffff8596b41a RDI: 0000000000000004 [ 69.932912][ T8908] RBP: ffff888091b06e70 R08: ffff88809334a640 R09: fffffbfff14ee533 [ 69.940903][ T8908] R10: fffffbfff14ee532 R11: ffffffff8a772997 R12: 00000000a0c44c0c [ 69.949319][ T8908] R13: ffff888091b074c0 R14: 00000000ffff8880 R15: ffff888091b074c0 [ 69.957594][ T8908] FS: 0000555555f24880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 69.966537][ T8908] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.973790][ T8908] CR2: 0000000020000100 CR3: 000000009f9b4000 CR4: 00000000001406e0 [ 69.982947][ T8908] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.991074][ T8908] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.999727][ T8908] Kernel panic - not syncing: Fatal exception in interrupt [ 70.008988][ T8908] Kernel Offset: disabled [ 70.015891][ T8908] Rebooting in 86400 seconds..