[ 65.554508][ T27] audit: type=1800 audit(1565986687.138:26): pid=8723 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 66.552380][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 66.552392][ T27] audit: type=1800 audit(1565986688.158:29): pid=8723 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 66.584964][ T27] audit: type=1800 audit(1565986688.168:30): pid=8723 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.75' (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: [ 77.396739][ T8876] IPVS: ftp: loaded support on port[0] = 21 [ 77.458327][ T8884] ------------[ cut here ]------------ [ 77.463862][ T8884] kernel BUG at include/linux/skbuff.h:2233! [ 77.469883][ T8884] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 77.475941][ T8884] CPU: 1 PID: 8884 Comm: syz-executor757 Not tainted 5.3.0-rc4-next-20190816 #67 [ 77.485016][ T8884] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.495074][ T8884] RIP: 0010:skb_pull+0xea/0x110 [ 77.499916][ T8884] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 7c dc da fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 66 dc da fb <0f> 0b e8 6f b9 15 fc e9 44 ff ff ff e8 65 b9 15 fc eb 8a e8 7e b9 [ 77.519623][ T8884] RSP: 0018:ffff88809496ee50 EFLAGS: 00010293 [ 77.525664][ T8884] RAX: ffff8880a0fec400 RBX: 0000000000000004 RCX: ffffffff859753c6 [ 77.533611][ T8884] RDX: 0000000000000000 RSI: ffffffff8597541a RDI: 0000000000000004 [ 77.541569][ T8884] RBP: ffff88809496ee70 R08: ffff8880a0fec400 R09: fffffbfff14ee933 [ 77.549518][ T8884] R10: fffffbfff14ee932 R11: ffffffff8a774997 R12: 000000008a8622cc [ 77.557466][ T8884] R13: ffff88809496f4c0 R14: 00000000ffff8880 R15: ffff88809496f4c0 [ 77.565427][ T8884] FS: 000055555600e880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 77.574431][ T8884] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.580992][ T8884] CR2: 0000000020000100 CR3: 00000000a006f000 CR4: 00000000001406e0 [ 77.588939][ T8884] Call Trace: [ 77.592213][ T8884] ? __kasan_check_read+0x11/0x20 [ 77.597220][ T8884] sctp_inq_pop+0x2f1/0xd80 [ 77.601720][ T8884] sctp_endpoint_bh_rcv+0x184/0x8d0 [ 77.606905][ T8884] ? sctp_endpoint_lookup_assoc+0x290/0x290 [ 77.612777][ T8884] ? rwlock_bug.part.0+0x90/0x90 [ 77.617692][ T8884] ? lock_acquire+0x190/0x410 [ 77.622352][ T8884] sctp_inq_push+0x1e4/0x280 [ 77.626936][ T8884] sctp_rcv+0x2807/0x3590 [ 77.631259][ T8884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.637480][ T8884] ? sctp_addrs_lookup_transport+0x7a0/0x7a0 [ 77.643466][ T8884] ? __kasan_check_read+0x11/0x20 [ 77.648472][ T8884] ? mark_lock+0xc2/0x1220 [ 77.652871][ T8884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.659091][ T8884] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 77.665223][ T8884] ? rcu_read_lock_held+0x9c/0xb0 [ 77.670233][ T8884] sctp6_rcv+0x17/0x30 [ 77.674288][ T8884] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 77.679903][ T8884] ip6_input_finish+0x84/0x170 [ 77.684658][ T8884] ip6_input+0xe4/0x3f0 [ 77.688792][ T8884] ? ip6_input_finish+0x170/0x170 [ 77.693793][ T8884] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 77.699930][ T8884] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 77.705811][ T8884] ? rcu_read_lock_held_common+0x130/0x130 [ 77.711606][ T8884] ip6_sublist_rcv_finish+0x98/0x1e0 [ 77.716881][ T8884] ip6_sublist_rcv+0x80c/0xcf0 [ 77.721623][ T8884] ? ip6_rcv_finish+0x2f0/0x2f0 [ 77.726452][ T8884] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 77.732331][ T8884] ? ip6_rcv_core.isra.0+0x1011/0x1bb0 [ 77.737779][ T8884] ipv6_list_rcv+0x373/0x4b0 [ 77.742351][ T8884] ? __kasan_check_read+0x11/0x20 [ 77.747353][ T8884] ? ipv6_rcv+0x420/0x420 [ 77.751659][ T8884] ? __lock_acquire+0x8a1/0x4e70 [ 77.756575][ T8884] ? __kasan_check_read+0x11/0x20 [ 77.761575][ T8884] ? ipv6_rcv+0x420/0x420 [ 77.765902][ T8884] __netif_receive_skb_list_core+0x5fc/0x9d0 [ 77.771868][ T8884] ? ktime_get_with_offset+0x13a/0x350 [ 77.777306][ T8884] ? ktime_get_with_offset+0x13a/0x350 [ 77.782742][ T8884] ? process_backlog+0x750/0x750 [ 77.787659][ T8884] ? lock_acquire+0x190/0x410 [ 77.792315][ T8884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.798542][ T8884] ? __kasan_check_read+0x11/0x20 [ 77.803567][ T8884] netif_receive_skb_list_internal+0x7eb/0xe60 [ 77.809717][ T8884] ? __netif_receive_skb_list_core+0x9d0/0x9d0 [ 77.815905][ T8884] ? __kasan_check_read+0x11/0x20 [ 77.820914][ T8884] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 77.827169][ T8884] ? eth_gro_receive+0x890/0x890 [ 77.832102][ T8884] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 77.838060][ T8884] gro_normal_list.part.0+0x1e/0xb0 [ 77.843236][ T8884] napi_gro_frags+0xa6a/0xea0 [ 77.847894][ T8884] tun_get_user+0x2e98/0x3fa0 [ 77.852554][ T8884] ? __kasan_check_read+0x11/0x20 [ 77.857557][ T8884] ? __lock_acquire+0x8a1/0x4e70 [ 77.862479][ T8884] ? tun_build_skb.isra.0+0x1390/0x1390 [ 77.868020][ T8884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.874241][ T8884] ? __kasan_check_read+0x11/0x20 [ 77.879246][ T8884] tun_chr_write_iter+0xbd/0x156 [ 77.884165][ T8884] do_iter_readv_writev+0x5f8/0x8f0 [ 77.889345][ T8884] ? no_seek_end_llseek_size+0x70/0x70 [ 77.894783][ T8884] ? apparmor_file_permission+0x25/0x30 [ 77.900313][ T8884] ? rw_verify_area+0x126/0x360 [ 77.905142][ T8884] do_iter_write+0x17b/0x380 [ 77.909717][ T8884] vfs_writev+0x1b3/0x2f0 [ 77.914034][ T8884] ? vfs_iter_write+0xb0/0xb0 [ 77.918702][ T8884] ? find_held_lock+0x35/0x130 [ 77.923451][ T8884] ? __do_page_fault+0x56a/0xdd0 [ 77.928382][ T8884] ? lock_downgrade+0x920/0x920 [ 77.933224][ T8884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.939463][ T8884] ? __fget_light+0x1a9/0x230 [ 77.944118][ T8884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.950346][ T8884] do_writev+0x15b/0x330 [ 77.954597][ T8884] ? vfs_writev+0x2f0/0x2f0 [ 77.959083][ T8884] ? do_syscall_64+0x26/0x760 [ 77.963752][ T8884] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.969796][ T8884] ? do_syscall_64+0x26/0x760 [ 77.974456][ T8884] __x64_sys_writev+0x75/0xb0 [ 77.979116][ T8884] do_syscall_64+0xfa/0x760 [ 77.983601][ T8884] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.989467][ T8884] RIP: 0033:0x441b10 [ 77.993340][ T8884] 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 [ 78.012934][ T8884] RSP: 002b:00007ffcaf570628 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 78.021322][ T8884] RAX: ffffffffffffffda RBX: 00007ffcaf570640 RCX: 0000000000441b10 [ 78.029269][ T8884] RDX: 0000000000000001 RSI: 00007ffcaf570670 RDI: 00000000000000f0 [ 78.037221][ T8884] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 78.045187][ T8884] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000012e55 [ 78.053144][ T8884] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000 [ 78.061096][ T8884] Modules linked in: [ 78.065018][ T8884] ---[ end trace 88b472ddc12f7b70 ]--- [ 78.070474][ T8884] RIP: 0010:skb_pull+0xea/0x110 [ 78.075337][ T8884] Code: 9d c8 00 00 00 49 89 dc 49 89 9d c8 00 00 00 e8 7c dc da fb 4c 89 e0 5b 41 5c 41 5d 41 5e 5d c3 45 31 e4 eb ea e8 66 dc da fb <0f> 0b e8 6f b9 15 fc e9 44 ff ff ff e8 65 b9 15 fc eb 8a e8 7e b9 [ 78.094954][ T8884] RSP: 0018:ffff88809496ee50 EFLAGS: 00010293 [ 78.100999][ T8884] RAX: ffff8880a0fec400 RBX: 0000000000000004 RCX: ffffffff859753c6 [ 78.108979][ T8884] RDX: 0000000000000000 RSI: ffffffff8597541a RDI: 0000000000000004 [ 78.116960][ T8884] RBP: ffff88809496ee70 R08: ffff8880a0fec400 R09: fffffbfff14ee933 [ 78.125032][ T8884] R10: fffffbfff14ee932 R11: ffffffff8a774997 R12: 000000008a8622cc [ 78.133028][ T8884] R13: ffff88809496f4c0 R14: 00000000ffff8880 R15: ffff88809496f4c0 [ 78.141007][ T8884] FS: 000055555600e880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 78.149974][ T8884] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.156585][ T8884] CR2: 0000000020000100 CR3: 00000000a006f000 CR4: 00000000001406e0 [ 78.164576][ T8884] Kernel panic - not syncing: Fatal exception in interrupt [ 78.172742][ T8884] Kernel Offset: disabled [ 78.177060][ T8884] Rebooting in 86400 seconds..