/* * AppArmor security module * * This file contains AppArmor resource mediation and attachment * * Copyright (C) 1998-2008 Novell/SUSE * Copyright 2009-2010 Canonical Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation, version 2 of the * License. */ #include #include "include/audit.h" #include "include/context.h" #include "include/resource.h" #include "include/policy.h" /* * Table of rlimit names: we generate it from resource.h. */ #include "rlim_names.h" struct aa_fs_entry aa_fs_entry_rlimit[] = { AA_FS_FILE_STRING("mask", AA_FS_RLIMIT_MASK), { } }; /* audit callback for resource specific fields */ static void audit_cb(struct audit_buffer *ab, void *va) { struct common_audit_data *sa = va; audit_log_format(ab, " rlimit=%s value=%lu", rlim_names[sa->aad->rlim.rlim], sa->aad->rlim.max); } /** * audit_resource - audit setting resource limit * @profile: profile being enforced (NOT NULL) * @resoure: rlimit being auditing * @value: value being set * @error: error value * * Returns: 0 or sa->error else other error code on failure */ static int audit_resource(struct aa_profile *profile, unsigned int resource, unsigned long value, int error) { struct common_audit_data sa; struct apparmor_audit_data aad = {0,}; sa.type = LSM_AUDIT_DATA_NONE; sa.aad = &aad; aad.op = OP_SETRLIMIT, aad.rlim.rlim = resource; aad.rlim.max = value; aad.error = error; return aa_audit(AUDIT_APPARMOR_AUTO, profile, GFP_KERNEL, &sa, audit_cb); } /** * aa_map_resouce - map compiled policy resource to internal # * @resource: flattened policy resource number * * Returns: resource # for the current architecture. * * rlimit resource can vary based on architecture, map the compiled policy * resource # to the internal representation for the architecture. */ int aa_map_resource(int resource) { return rlim_map[resource]; } /** * aa_task_setrlimit - test permission to set an rlimit * @profile - profile confining the task (NOT NULL) * @task - task the resource is being set on * @resource - the resource being set * @new_rlim - the new resource limit (NOT NULL) * * Control raising the processes hard limit. * * Returns: 0 or error code if setting resource failed */ int aa_task_setrlimit(struct aa_profile *profile, struct task_struct *task, unsigned int resource, struct rlimit *new_rlim) { struct aa_profile *task_profile; int error = 0; rcu_read_lock(); task_profile = aa_get_profile(aa_cred_profile(__task_cred(task))); rcu_read_unlock(); /* TODO: extend resource control to handle other (non current) * profiles. AppArmor rules currently have the implicit assumption * that the task is setting the resource of a task confined with * the same profile or that the task setting the resource of another * task has CAP_SYS_RESOURCE. */ if ((profile != task_profile && aa_capable(profile, CAP_SYS_RESOURCE, 1)) || (profile->rlimits.mask & (1 << resource) && new_rlim->rlim_max > profile->rlimits.limits[resource].rlim_max)) error = -EACCES; aa_put_profile(task_profile); return audit_resource(profile, resource, new_rlim->rlim_max, error); } /** * __aa_transition_rlimits - apply new profile rlimits * @old: old profile on task (NOT NULL) * @new: new profile with rlimits to apply (NOT NULL) */ void __aa_transition_rlimits(struct aa_profile *old, struct aa_profile *new) { unsigned int mask = 0; struct rlimit *rlim, *initrlim; int i; /* for any rlimits the profile controlled reset the soft limit * to the less of the tasks hard limit and the init tasks soft limit */ if (old->rlimits.mask) { for (i = 0, mask = 1; i < RLIM_NLIMITS; i++, mask <<= 1) { if (old->rlimits.mask & mask) { rlim = current->signal->rlim + i; initrlim = init_task.signal->rlim + i; rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur); } } } /* set any new hard limits as dictated by the new profile */ if (!new->rlimits.mask) return; for (i = 0, mask = 1; i < RLIM_NLIMITS; i++, mask <<= 1) { if (!(new->rlimits.mask & mask)) continue; rlim = current->signal->rlim + i; rlim->rlim_max = min(rlim->rlim_max, new->rlimits.limits[i].rlim_max); /* soft limit should not exceed hard limit */ rlim->rlim_cur = min(rlim->rlim_cur, rlim->rlim_max); } } > 2017-02-02net: phy: Marvell: Add mv88e6390 internal PHYAndrew Lunn1-0/+6 2017-02-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller9-30/+40 2017-02-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds4-19/+26 2017-02-01Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vir...Linus Torvalds1-0/+1 2017-02-01Merge tag 'wireless-drivers-next-for-davem-2017-02-01' of git://git.kernel.or...David S. Miller2-1/+2 2017-02-01net: fix ndo_features_check/ndo_fix_features comment orderingDimitris Michailidis1-14/+15