1#!/usr/bin/python3 2# 3# Copyright 2019 The Android Open Source Project 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17# ---------------------------------------------------------------------- 18 19# This triggers a kernel panic on 4.9.114+ which is fixed in 4.9.136 20# 21# Crash was introduced by ad8b1ffc3efae2f65080bdb11145c87d299b8f9a 22# and reverted in 2edec22d18758c9b29301ded2291f051d65422e9 23 24# ---------------------------------------------------------------------- 25 26# Modules linked in: 27# Pid: 305, comm: python Not tainted 4.9.114 28# RIP: 0033:[<0000000060272d73>] 29# RSP: 000000007fd09a10 EFLAGS: 00010246 30# RAX: 0000000060492fa8 RBX: 0000000060272b18 RCX: 000000007ff412a8 31# RDX: 000000007ff41288 RSI: 000000007fd09a98 RDI: 000000007ff14a00 32# RBP: 000000007fd09a40 R08: 0000000000000001 R09: 0100000000000000 33# R10: 0000000000000000 R11: 000000007ff412a8 R12: 0000000000010002 34# R13: 000000000000000a R14: 0000000000000000 R15: 0000000000000000 35# Kernel panic - not syncing: Kernel mode fault at addr 0x48, ip 0x60272d73 36# CPU: 0 PID: 305 Comm: python Not tainted 4.9.114 #7 37# Stack: 38# 7fcd5000 7ff411e0 7ff14a00 7ff41000 39# 00000000 00000000 7fd09b00 6031acd9 40# 00000000 7ff41288 7ff4100c 100000003 41# Call Trace: 42# [<6031acd9>] ip6t_do_table+0x2a3/0x3d4 43# [<6026d300>] ? netfilter_net_init+0xd5/0x14f 44# [<6026d37a>] ? nf_iterate+0x0/0x5c 45# [<6031c99d>] ip6table_filter_hook+0x21/0x23 46# [<6026d3b2>] nf_iterate+0x38/0x5c 47# [<6026d40a>] nf_hook_slow+0x34/0xa2 48# [<6003166c>] ? set_signals+0x0/0x3f 49# [<6003165d>] ? get_signals+0x0/0xf 50# [<603045d4>] rawv6_sendmsg+0x842/0xc4b 51# [<60033d15>] ? wait_stub_done+0x40/0x10a 52# [<60021176>] ? copy_chunk_from_user+0x23/0x2e 53# [<60021153>] ? copy_chunk_from_user+0x0/0x2e 54# [<60302da3>] ? dst_output+0x0/0x11 55# [<602b063a>] inet_sendmsg+0x1e/0x5c 56# [<600fe142>] ? __fdget+0x15/0x17 57# [<6022636c>] sock_sendmsg+0xf/0x62 58# [<6022785d>] SyS_sendto+0x108/0x140 59# [<600389c2>] ? arch_switch_to+0x2b/0x2e 60# [<60367ce4>] ? __schedule+0x428/0x44f 61# [<603678bc>] ? __schedule+0x0/0x44f 62# [<60021125>] handle_syscall+0x79/0xa7 63# [<6003445c>] userspace+0x3bb/0x453 64# [<6001dd92>] ? interrupt_end+0x0/0x94 65# [<6001dc42>] fork_handler+0x85/0x87 66# 67# /android/kernel/tests/net/test/run_net_test.sh: line 397: 50828 Aborted 68# $KERNEL_BINARY umid=net_test mem=512M $blockdevice=$SCRIPT_DIR/$ROOTFS $netconfig $consolemode $cmdline 1>&2 69# Returning exit code 134. 70 71# ---------------------------------------------------------------------- 72 73import binascii 74import os 75import socket 76import unittest 77 78import net_test 79 80class RemovedFeatureTest(net_test.NetworkTest): 81 82 def setUp(self): 83 net_test.RunIptablesCommand(6, "-I OUTPUT 1 -m policy --dir out --pol ipsec") 84 85 def tearDown(self): 86 net_test.RunIptablesCommand(6, "-D OUTPUT -m policy --dir out --pol ipsec") 87 88 def testPolicyNetfilterFragPanic(self): 89 ipv6_min_mtu = 1280 90 ipv6_header_size = 40 91 ipv6_frag_header_size = 8 92 93 pkt1_frag_len = ipv6_min_mtu - ipv6_header_size - ipv6_frag_header_size 94 pkt2_frag_len = 1 95 96 ip6loopback = '00000000000000000000000000000001' # ::1 97 98 # 40 byte IPv6 header 99 ver6 = '6' 100 tclass = '00' 101 flowlbl = '00000' 102 # (uint16) payload length - of rest of packets in octets 103 pkt1_plen = '%04x' % (ipv6_frag_header_size + pkt1_frag_len) 104 pkt2_plen = '%04x' % (ipv6_frag_header_size + pkt2_frag_len) 105 nexthdr = '2c' # = 44 IPv6-Frag 106 hoplimit = '00' 107 src = ip6loopback 108 dst = ip6loopback 109 110 # 8 byte IPv6 fragmentation header 111 frag_nexthdr = '3b' 112 frag_reserved = '00' 113 # 13-bit offset, 2-bit reserved, 1-bit M[ore] flag 114 pkt1_frag_offset = '0001' 115 pkt2_frag_offset = '%04x' % pkt1_frag_len 116 frag_identification = '00000000' 117 118 # Fragmentation payload 119 pkt1_frag_payload = '00' * pkt1_frag_len 120 pkt2_frag_payload = '00' * pkt2_frag_len 121 122 pkt1 = (ver6 + tclass + flowlbl + pkt1_plen + nexthdr + hoplimit + src + dst 123 + frag_nexthdr + frag_reserved + pkt1_frag_offset + frag_identification 124 + pkt1_frag_payload) 125 pkt2 = (ver6 + tclass + flowlbl + pkt2_plen + nexthdr + hoplimit + src + dst 126 + frag_nexthdr + frag_reserved + pkt2_frag_offset + frag_identification 127 + pkt2_frag_payload) 128 129 s = socket.socket(socket.AF_INET6, socket.SOCK_RAW, socket.IPPROTO_RAW) 130 s.sendto(binascii.unhexlify(pkt1), ('::1', 0)) 131 s.sendto(binascii.unhexlify(pkt2), ('::1', 0)) 132 s.close() 133 134 135if __name__ == "__main__": 136 unittest.main() 137