1# Copyright (c) 2012 The Chromium OS Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5AUTHOR = "Chromium OS Team" 6NAME = "platform_OSLimits" 7PURPOSE = "Verify some kernel settings." 8CRITERIA = """ 9Fail if we find unexpected values for resource limits: 10 - Max open files 11 - Max processes 12or unexpected values for sysctls: 13 - fs/file-max 14 - fs/leases-enable 15 - fs/nr_open 16 - kernel/kptr_restrict 17 - kernel/ngroups_max 18 - kernel/panic 19 - kernel/pid_max 20 - kernel/randomize_va_space 21 - kernel/suid_dumpable 22 - kernel/sysrq 23 - kernel/threads-max 24 - net/ipv4/tcp_syncookies 25 - vm/mmap_min_addr 26""" 27ATTRIBUTES = "suite:bvt-inline, suite:smoke" 28SUITE = "bvt-inline, smoke" 29TIME = "SHORT" 30TEST_CATEGORY = "Functional" 31TEST_CLASS = "platform" 32TEST_TYPE = "client" 33JOB_RETRIES = 2 34DOC = """ 35Verifies various system level limits and settings. 36 37The resources being verified are: 38 - Max open files: the maximum number of file descriptors a process can open. 39 - Max processes: the maximum number of processes that can be created for 40 the real user id of the calling process. 41 42The sysctls being verified are: 43 - fs/file-max: maximum number of file handles that the kernel will allocate. 44 The default value is usually about 10% of RAM in kilobytes. 45 - fs/leases-enable: 46 - 0: no leases on files allowed. 47 - 1: leases are allowed to be established on a file. 48 - fs/nr_open: the maximum number of file handles a process can allocate. 49 file-max cannot exceed this value. 50 - kernel/kptr_restrict: do not expose kernel addresses to userspace. 51 - kernel/ngroups_max: the number a groups a user may belong to. 52 - kernel/panic: number of seconds the kernel postpones rebooting when the 53 system experiences a kernel panic. 0 disables automatic rebooting. 54 - kernel/pid_max: the maximum value of a pid before it wraps. 55 - kernel/randomize_va_space: 56 - 0: no ASLR for userspace processes. 57 - 1: ASLR for stack and mmap (and exec if built PIE). 58 - 2: same as above except also randomize brk location. 59 - kernel/suid_dumpable: 60 - 0: core dump not produced for a process with changed cred. 61 - 1: all processes core dump when possible. 62 - 2: binary which is not normally dumped is dumped ro by root. 63 - kernel/sysrq: Activates the System Request Key when anything other than 0. 64 - kernel/threads-max: Maximum threads on system. 65 - net/ipv4/tcp_syncookies: make sure weird inbound TCP flooding is safe. 66 - vm/mmap_min_addr: make sure low memory cannot be allocated. 67""" 68 69job.run_test('platform_OSLimits') 70