CtsSecurityTestCases#ListeningPortsTest定位tcp端口与pid

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【问题描述】

cts失败项

armeabi-v7a CtsSecurityTestCases

android.security.cts.ListeningPortsTest#testNoListeningLoopbackTcpPorts

工具：9.0_r11

05-06 17:11:28.649 17375 17391 E TestRunner: android.security.cts.ListeningPortsTest$ListeningPortsAssertionError: 05-06 17:11:28.649 17375 17391 E TestRunner: Found port listening on addr=127.0.0.1, port=10100, UID=1000 [com.android.keychain, com.itv.android.iptv, com.android.location.fused, com.android.providers.settings,com.launcher.idn, android, com.itv.android.iptv.tvclient,com.droidlogic, com.android.wallpaperbackup, com.droidlogic.BluetoothRemote, ] in /proc/net/tcp 05-06 17:11:28.649 17375 17391 E TestRunner: at android.security.cts.ListeningPortsTest.assertNoAccessibleListeningPorts(ListeningPortsTest.java:250) 05-06 17:11:28.649 17375 17391 E TestRunner: at android.security.cts.ListeningPortsTest.testNoListeningLoopbackTcpPorts(ListeningPortsTest.java:138)

【问题结论】

定位到subtitle端口监听某次提交，回退后测试pass

AuthBlog：秋城https://www.cnblogs.com/houser0323

【分析详细】

1.定位节点inode

port=10100是十进制，/proc/net/tcp中port是十六进制，做一下转换10110-->2774,见下面2:处，对应inode为32905。

console:/ # cat proc/net/tcp sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode 0: 7632A8C0:EA60 00000000:0000 0A 00000000:00000000 00:00000000 00000000 1000 0 58215 1 00000000 100 0 0 10 0 1: 00000000:1A85 00000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 33635 1 00000000 100 0 0 10 0 2: 0100007F:2774 00000000:0000 0A 00000000:00000000 00:00000000 00000000 1000 0 32905 1 00000000 100 0 0 10 0

2.根据inode查找pid

进入/proc/[pid]/fd/目录下ls -l 查看socket端口号，由于我们不知道在哪个pid目录下，所以遍历一下

sh脚本或者终端输入shell命令for循环遍历查找32905节点的pid：

# for dir in `find /proc -name "fd" 2>/dev/null` > do > ls -l $dir | grep "socket\:\[32905\]" && echo $dir > done

结果查找到pid为4085

lrwx------ 1 root root 64 2020-05-07 11:03 46 -> socket:[32905] /proc/4085/task/4085/fd lrwx------ 1 root root 64 2020-05-07 11:03 46 -> socket:[32905] /proc/4085/task/4094/fd ...... lrwx------ 1 root root 64 2020-05-07 10:47 46 -> socket:[32905] /proc/4085/fd

3.查看pid对应的程序

console:/ # ps 4085 USER PID PPID VSZ RSS WCHAN ADDR S NAME system 4085 3024 1124392 82892 SyS_epoll_wait 0 S com.droidlogic.SubTitleService

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