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![Andrew Morgan](/assets/img/avatar_default.png)
The non-filesystem capability meaning of CAP_SETPCAP is that a process, p1, can change the capabilities of another process, p2. This is not the meaning that was intended for this capability at all, and this implementation came about purely because, without filesystem capabilities, there was no way to use capabilities without one process bestowing them on another. Since we now have a filesystem support for capabilities we can fix the implementation of CAP_SETPCAP. The most significant thing about this change is that, with it in effect, no process can set the capabilities of another process. The capabilities of a program are set via the capability convolution rules: pI(post-exec) = pI(pre-exec) pP(post-exec) = (X(aka cap_bset) & fP) | (pI(post-exec) & fI) pE(post-exec) = fE ? pP(post-exec) : 0 at exec() time. As such, the only influence the pre-exec() program can have on the post-exec() program's capabilities are through the pI capability set. The correct implementation for CAP_SETPCAP (and that enabled by this patch) is that it can be used to add extra pI capabilities to the current process - to be picked up by subsequent exec()s when the above convolution rules are applied. Here is how it works: Let's say we have a process, p. It has capability sets, pE, pP and pI. Generally, p, can change the value of its own pI to pI' where (pI' & ~pI) & ~pP = 0. That is, the only new things in pI' that were not present in pI need to be present in pP. The role of CAP_SETPCAP is basically to permit changes to pI beyond the above: if (pE & CAP_SETPCAP) { pI' = anything; /* ie., even (pI' & ~pI) & ~pP != 0 */ } This capability is useful for things like login, which (say, via pam_cap) might want to raise certain inheritable capabilities for use by the children of the logged-in user's shell, but those capabilities are not useful to or needed by the login program itself. One such use might be to limit who can run ping. You set the capabilities of the 'ping' program to be "= cap_net_raw+i", and then only shells that have (pI & CAP_NET_RAW) will be able to run it. Without CAP_SETPCAP implemented as described above, login(pam_cap) would have to also have (pP & CAP_NET_RAW) in order to raise this capability and pass it on through the inheritable set. Signed-off-by: Andrew Morgan <morgan@kernel.org> Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: James Morris <jmorris@namei.org> Cc: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1139 lines
26 KiB
C
1139 lines
26 KiB
C
/*
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* Stub functions for the default security function pointers in case no
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* security model is loaded.
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*
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* Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
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* Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#undef DEBUG
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#include <linux/capability.h>
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#include <linux/kernel.h>
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#include <linux/mman.h>
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#include <linux/pagemap.h>
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#include <linux/swap.h>
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#include <linux/security.h>
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#include <linux/skbuff.h>
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#include <linux/netlink.h>
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#include <net/sock.h>
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#include <linux/xattr.h>
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#include <linux/hugetlb.h>
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#include <linux/ptrace.h>
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#include <linux/file.h>
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static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
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{
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return 0;
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}
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static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
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kernel_cap_t * inheritable, kernel_cap_t * permitted)
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{
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*effective = *inheritable = *permitted = 0;
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if (target->euid == 0) {
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*permitted |= (~0 & ~CAP_FS_MASK);
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*effective |= (~0 & ~CAP_TO_MASK(CAP_SETPCAP) & ~CAP_FS_MASK);
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}
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if (target->fsuid == 0) {
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*permitted |= CAP_FS_MASK;
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*effective |= CAP_FS_MASK;
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}
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return 0;
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}
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static int dummy_capset_check (struct task_struct *target,
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kernel_cap_t * effective,
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kernel_cap_t * inheritable,
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kernel_cap_t * permitted)
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{
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return -EPERM;
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}
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static void dummy_capset_set (struct task_struct *target,
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kernel_cap_t * effective,
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kernel_cap_t * inheritable,
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kernel_cap_t * permitted)
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{
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return;
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}
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static int dummy_acct (struct file *file)
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{
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return 0;
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}
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static int dummy_capable (struct task_struct *tsk, int cap)
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{
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if (cap_raised (tsk->cap_effective, cap))
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return 0;
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return -EPERM;
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}
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static int dummy_sysctl (ctl_table * table, int op)
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{
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return 0;
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}
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static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
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{
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return 0;
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}
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static int dummy_quota_on (struct dentry *dentry)
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{
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return 0;
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}
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static int dummy_syslog (int type)
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{
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if ((type != 3 && type != 10) && current->euid)
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return -EPERM;
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return 0;
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}
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static int dummy_settime(struct timespec *ts, struct timezone *tz)
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{
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if (!capable(CAP_SYS_TIME))
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return -EPERM;
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return 0;
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}
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static int dummy_vm_enough_memory(struct mm_struct *mm, long pages)
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{
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int cap_sys_admin = 0;
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if (dummy_capable(current, CAP_SYS_ADMIN) == 0)
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cap_sys_admin = 1;
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return __vm_enough_memory(mm, pages, cap_sys_admin);
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}
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static int dummy_bprm_alloc_security (struct linux_binprm *bprm)
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{
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return 0;
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}
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static void dummy_bprm_free_security (struct linux_binprm *bprm)
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{
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return;
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}
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static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
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{
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if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
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set_dumpable(current->mm, suid_dumpable);
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if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
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bprm->e_uid = current->uid;
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bprm->e_gid = current->gid;
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}
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}
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current->suid = current->euid = current->fsuid = bprm->e_uid;
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current->sgid = current->egid = current->fsgid = bprm->e_gid;
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dummy_capget(current, ¤t->cap_effective, ¤t->cap_inheritable, ¤t->cap_permitted);
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}
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static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm)
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{
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return;
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}
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static int dummy_bprm_set_security (struct linux_binprm *bprm)
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{
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return 0;
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}
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static int dummy_bprm_check_security (struct linux_binprm *bprm)
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{
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return 0;
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}
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static int dummy_bprm_secureexec (struct linux_binprm *bprm)
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{
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/* The new userland will simply use the value provided
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in the AT_SECURE field to decide whether secure mode
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is required. Hence, this logic is required to preserve
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the legacy decision algorithm used by the old userland. */
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return (current->euid != current->uid ||
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current->egid != current->gid);
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}
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static int dummy_sb_alloc_security (struct super_block *sb)
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{
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return 0;
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}
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static void dummy_sb_free_security (struct super_block *sb)
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{
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return;
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}
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static int dummy_sb_copy_data (struct file_system_type *type,
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void *orig, void *copy)
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{
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return 0;
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}
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static int dummy_sb_kern_mount (struct super_block *sb, void *data)
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{
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return 0;
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}
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static int dummy_sb_statfs (struct dentry *dentry)
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{
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return 0;
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}
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static int dummy_sb_mount (char *dev_name, struct nameidata *nd, char *type,
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unsigned long flags, void *data)
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{
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return 0;
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}
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static int dummy_sb_check_sb (struct vfsmount *mnt, struct nameidata *nd)
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{
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return 0;
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}
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static int dummy_sb_umount (struct vfsmount *mnt, int flags)
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{
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return 0;
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}
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static void dummy_sb_umount_close (struct vfsmount *mnt)
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{
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return;
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}
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static void dummy_sb_umount_busy (struct vfsmount *mnt)
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{
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return;
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}
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static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
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void *data)
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{
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return;
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}
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static void dummy_sb_post_mountroot (void)
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{
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return;
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}
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static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd)
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{
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return;
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}
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static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
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{
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return 0;
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}
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static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
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{
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return;
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}
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static int dummy_inode_alloc_security (struct inode *inode)
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{
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return 0;
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}
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static void dummy_inode_free_security (struct inode *inode)
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{
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return;
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}
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static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
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char **name, void **value, size_t *len)
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{
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return -EOPNOTSUPP;
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}
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static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
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int mask)
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{
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return 0;
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}
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static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
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struct dentry *new_dentry)
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{
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return 0;
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}
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static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
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{
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return 0;
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}
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static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
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const char *name)
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{
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return 0;
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}
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static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
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int mask)
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{
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return 0;
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}
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static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
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{
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return 0;
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}
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static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
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int mode, dev_t dev)
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{
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return 0;
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}
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static int dummy_inode_rename (struct inode *old_inode,
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struct dentry *old_dentry,
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struct inode *new_inode,
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struct dentry *new_dentry)
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{
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return 0;
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}
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static int dummy_inode_readlink (struct dentry *dentry)
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{
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return 0;
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}
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static int dummy_inode_follow_link (struct dentry *dentry,
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struct nameidata *nameidata)
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{
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return 0;
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}
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static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
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{
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return 0;
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}
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static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
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{
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return 0;
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}
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static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
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{
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return 0;
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}
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static void dummy_inode_delete (struct inode *ino)
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{
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return;
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}
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static int dummy_inode_setxattr (struct dentry *dentry, char *name, void *value,
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size_t size, int flags)
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{
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if (!strncmp(name, XATTR_SECURITY_PREFIX,
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sizeof(XATTR_SECURITY_PREFIX) - 1) &&
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!capable(CAP_SYS_ADMIN))
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return -EPERM;
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return 0;
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}
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static void dummy_inode_post_setxattr (struct dentry *dentry, char *name, void *value,
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size_t size, int flags)
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{
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}
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static int dummy_inode_getxattr (struct dentry *dentry, char *name)
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{
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return 0;
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}
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static int dummy_inode_listxattr (struct dentry *dentry)
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{
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return 0;
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}
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static int dummy_inode_removexattr (struct dentry *dentry, char *name)
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{
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if (!strncmp(name, XATTR_SECURITY_PREFIX,
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sizeof(XATTR_SECURITY_PREFIX) - 1) &&
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!capable(CAP_SYS_ADMIN))
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return -EPERM;
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return 0;
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}
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static int dummy_inode_need_killpriv(struct dentry *dentry)
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{
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return 0;
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}
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static int dummy_inode_killpriv(struct dentry *dentry)
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{
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return 0;
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}
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static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
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{
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return -EOPNOTSUPP;
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}
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static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
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{
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return -EOPNOTSUPP;
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}
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static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
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{
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return 0;
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}
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static int dummy_file_permission (struct file *file, int mask)
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{
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return 0;
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}
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static int dummy_file_alloc_security (struct file *file)
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{
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return 0;
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}
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static void dummy_file_free_security (struct file *file)
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{
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return;
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}
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static int dummy_file_ioctl (struct file *file, unsigned int command,
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unsigned long arg)
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{
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return 0;
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}
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static int dummy_file_mmap (struct file *file, unsigned long reqprot,
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unsigned long prot,
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unsigned long flags,
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unsigned long addr,
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unsigned long addr_only)
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{
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if (addr < mmap_min_addr)
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return -EACCES;
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return 0;
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}
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static int dummy_file_mprotect (struct vm_area_struct *vma,
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unsigned long reqprot,
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unsigned long prot)
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{
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return 0;
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}
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static int dummy_file_lock (struct file *file, unsigned int cmd)
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{
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return 0;
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}
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static int dummy_file_fcntl (struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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return 0;
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}
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static int dummy_file_set_fowner (struct file *file)
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{
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return 0;
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}
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static int dummy_file_send_sigiotask (struct task_struct *tsk,
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struct fown_struct *fown, int sig)
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{
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return 0;
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}
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static int dummy_file_receive (struct file *file)
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{
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return 0;
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}
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static int dummy_dentry_open (struct file *file)
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{
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return 0;
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}
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static int dummy_task_create (unsigned long clone_flags)
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{
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return 0;
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}
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static int dummy_task_alloc_security (struct task_struct *p)
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{
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return 0;
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}
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static void dummy_task_free_security (struct task_struct *p)
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{
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return;
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}
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static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
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{
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return 0;
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}
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static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
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{
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dummy_capget(current, ¤t->cap_effective, ¤t->cap_inheritable, ¤t->cap_permitted);
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return 0;
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}
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static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
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{
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return 0;
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}
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static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
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{
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return 0;
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}
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static int dummy_task_getpgid (struct task_struct *p)
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{
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return 0;
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}
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static int dummy_task_getsid (struct task_struct *p)
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{
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return 0;
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}
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|
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static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
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{ }
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static int dummy_task_setgroups (struct group_info *group_info)
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{
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return 0;
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}
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|
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static int dummy_task_setnice (struct task_struct *p, int nice)
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{
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return 0;
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}
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static int dummy_task_setioprio (struct task_struct *p, int ioprio)
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{
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return 0;
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}
|
|
|
|
static int dummy_task_getioprio (struct task_struct *p)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_task_setscheduler (struct task_struct *p, int policy,
|
|
struct sched_param *lp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_task_getscheduler (struct task_struct *p)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_task_movememory (struct task_struct *p)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_task_wait (struct task_struct *p)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
|
|
int sig, u32 secid)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
|
|
unsigned long arg4, unsigned long arg5)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_task_reparent_to_init (struct task_struct *p)
|
|
{
|
|
p->euid = p->fsuid = 0;
|
|
return;
|
|
}
|
|
|
|
static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
|
|
{ }
|
|
|
|
static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_msg_msg_free_security (struct msg_msg *msg)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_msg_queue_free_security (struct msg_queue *msq)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int dummy_msg_queue_associate (struct msg_queue *msq,
|
|
int msqflg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
|
|
int msgflg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
|
|
struct task_struct *target, long type,
|
|
int mode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_shm_alloc_security (struct shmid_kernel *shp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_shm_free_security (struct shmid_kernel *shp)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
|
|
int shmflg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_sem_alloc_security (struct sem_array *sma)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_sem_free_security (struct sem_array *sma)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int dummy_sem_associate (struct sem_array *sma, int semflg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_sem_semctl (struct sem_array *sma, int cmd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_sem_semop (struct sem_array *sma,
|
|
struct sembuf *sops, unsigned nsops, int alter)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
NETLINK_CB(skb).eff_cap = current->cap_effective;
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_netlink_recv (struct sk_buff *skb, int cap)
|
|
{
|
|
if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
|
|
return -EPERM;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_SECURITY_NETWORK
|
|
static int dummy_unix_stream_connect (struct socket *sock,
|
|
struct socket *other,
|
|
struct sock *newsk)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_unix_may_send (struct socket *sock,
|
|
struct socket *other)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_create (int family, int type,
|
|
int protocol, int kern)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_post_create (struct socket *sock, int family, int type,
|
|
int protocol, int kern)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
|
|
int addrlen)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
|
|
int addrlen)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_listen (struct socket *sock, int backlog)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_socket_post_accept (struct socket *sock,
|
|
struct socket *newsock)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
|
|
int size)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
|
|
int size, int flags)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_getsockname (struct socket *sock)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_getpeername (struct socket *sock)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_shutdown (struct socket *sock, int how)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
|
|
int __user *optlen, unsigned len)
|
|
{
|
|
return -ENOPROTOOPT;
|
|
}
|
|
|
|
static int dummy_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
|
|
{
|
|
return -ENOPROTOOPT;
|
|
}
|
|
|
|
static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void dummy_sk_free_security (struct sock *sk)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_sk_clone_security (const struct sock *sk, struct sock *newsk)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_sk_getsecid(struct sock *sk, u32 *secid)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_sock_graft(struct sock* sk, struct socket *parent)
|
|
{
|
|
}
|
|
|
|
static inline int dummy_inet_conn_request(struct sock *sk,
|
|
struct sk_buff *skb, struct request_sock *req)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void dummy_inet_csk_clone(struct sock *newsk,
|
|
const struct request_sock *req)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_inet_conn_established(struct sock *sk,
|
|
struct sk_buff *skb)
|
|
{
|
|
}
|
|
|
|
static inline void dummy_req_classify_flow(const struct request_sock *req,
|
|
struct flowi *fl)
|
|
{
|
|
}
|
|
#endif /* CONFIG_SECURITY_NETWORK */
|
|
|
|
#ifdef CONFIG_SECURITY_NETWORK_XFRM
|
|
static int dummy_xfrm_policy_alloc_security(struct xfrm_policy *xp,
|
|
struct xfrm_user_sec_ctx *sec_ctx)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int dummy_xfrm_policy_clone_security(struct xfrm_policy *old, struct xfrm_policy *new)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_xfrm_policy_free_security(struct xfrm_policy *xp)
|
|
{
|
|
}
|
|
|
|
static int dummy_xfrm_policy_delete_security(struct xfrm_policy *xp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_xfrm_state_alloc_security(struct xfrm_state *x,
|
|
struct xfrm_user_sec_ctx *sec_ctx, u32 secid)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_xfrm_state_free_security(struct xfrm_state *x)
|
|
{
|
|
}
|
|
|
|
static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_xfrm_policy_lookup(struct xfrm_policy *xp, u32 sk_sid, u8 dir)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_xfrm_state_pol_flow_match(struct xfrm_state *x,
|
|
struct xfrm_policy *xp, struct flowi *fl)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int dummy_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_SECURITY_NETWORK_XFRM */
|
|
static int dummy_register_security (const char *name, struct security_operations *ops)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int dummy_getprocattr(struct task_struct *p, char *name, char **value)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static void dummy_release_secctx(char *secdata, u32 seclen)
|
|
{
|
|
}
|
|
|
|
#ifdef CONFIG_KEYS
|
|
static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
|
|
unsigned long flags)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void dummy_key_free(struct key *key)
|
|
{
|
|
}
|
|
|
|
static inline int dummy_key_permission(key_ref_t key_ref,
|
|
struct task_struct *context,
|
|
key_perm_t perm)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_KEYS */
|
|
|
|
struct security_operations dummy_security_ops;
|
|
|
|
#define set_to_dummy_if_null(ops, function) \
|
|
do { \
|
|
if (!ops->function) { \
|
|
ops->function = dummy_##function; \
|
|
pr_debug("Had to override the " #function \
|
|
" security operation with the dummy one.\n");\
|
|
} \
|
|
} while (0)
|
|
|
|
void security_fixup_ops (struct security_operations *ops)
|
|
{
|
|
set_to_dummy_if_null(ops, ptrace);
|
|
set_to_dummy_if_null(ops, capget);
|
|
set_to_dummy_if_null(ops, capset_check);
|
|
set_to_dummy_if_null(ops, capset_set);
|
|
set_to_dummy_if_null(ops, acct);
|
|
set_to_dummy_if_null(ops, capable);
|
|
set_to_dummy_if_null(ops, quotactl);
|
|
set_to_dummy_if_null(ops, quota_on);
|
|
set_to_dummy_if_null(ops, sysctl);
|
|
set_to_dummy_if_null(ops, syslog);
|
|
set_to_dummy_if_null(ops, settime);
|
|
set_to_dummy_if_null(ops, vm_enough_memory);
|
|
set_to_dummy_if_null(ops, bprm_alloc_security);
|
|
set_to_dummy_if_null(ops, bprm_free_security);
|
|
set_to_dummy_if_null(ops, bprm_apply_creds);
|
|
set_to_dummy_if_null(ops, bprm_post_apply_creds);
|
|
set_to_dummy_if_null(ops, bprm_set_security);
|
|
set_to_dummy_if_null(ops, bprm_check_security);
|
|
set_to_dummy_if_null(ops, bprm_secureexec);
|
|
set_to_dummy_if_null(ops, sb_alloc_security);
|
|
set_to_dummy_if_null(ops, sb_free_security);
|
|
set_to_dummy_if_null(ops, sb_copy_data);
|
|
set_to_dummy_if_null(ops, sb_kern_mount);
|
|
set_to_dummy_if_null(ops, sb_statfs);
|
|
set_to_dummy_if_null(ops, sb_mount);
|
|
set_to_dummy_if_null(ops, sb_check_sb);
|
|
set_to_dummy_if_null(ops, sb_umount);
|
|
set_to_dummy_if_null(ops, sb_umount_close);
|
|
set_to_dummy_if_null(ops, sb_umount_busy);
|
|
set_to_dummy_if_null(ops, sb_post_remount);
|
|
set_to_dummy_if_null(ops, sb_post_mountroot);
|
|
set_to_dummy_if_null(ops, sb_post_addmount);
|
|
set_to_dummy_if_null(ops, sb_pivotroot);
|
|
set_to_dummy_if_null(ops, sb_post_pivotroot);
|
|
set_to_dummy_if_null(ops, inode_alloc_security);
|
|
set_to_dummy_if_null(ops, inode_free_security);
|
|
set_to_dummy_if_null(ops, inode_init_security);
|
|
set_to_dummy_if_null(ops, inode_create);
|
|
set_to_dummy_if_null(ops, inode_link);
|
|
set_to_dummy_if_null(ops, inode_unlink);
|
|
set_to_dummy_if_null(ops, inode_symlink);
|
|
set_to_dummy_if_null(ops, inode_mkdir);
|
|
set_to_dummy_if_null(ops, inode_rmdir);
|
|
set_to_dummy_if_null(ops, inode_mknod);
|
|
set_to_dummy_if_null(ops, inode_rename);
|
|
set_to_dummy_if_null(ops, inode_readlink);
|
|
set_to_dummy_if_null(ops, inode_follow_link);
|
|
set_to_dummy_if_null(ops, inode_permission);
|
|
set_to_dummy_if_null(ops, inode_setattr);
|
|
set_to_dummy_if_null(ops, inode_getattr);
|
|
set_to_dummy_if_null(ops, inode_delete);
|
|
set_to_dummy_if_null(ops, inode_setxattr);
|
|
set_to_dummy_if_null(ops, inode_post_setxattr);
|
|
set_to_dummy_if_null(ops, inode_getxattr);
|
|
set_to_dummy_if_null(ops, inode_listxattr);
|
|
set_to_dummy_if_null(ops, inode_removexattr);
|
|
set_to_dummy_if_null(ops, inode_need_killpriv);
|
|
set_to_dummy_if_null(ops, inode_killpriv);
|
|
set_to_dummy_if_null(ops, inode_getsecurity);
|
|
set_to_dummy_if_null(ops, inode_setsecurity);
|
|
set_to_dummy_if_null(ops, inode_listsecurity);
|
|
set_to_dummy_if_null(ops, file_permission);
|
|
set_to_dummy_if_null(ops, file_alloc_security);
|
|
set_to_dummy_if_null(ops, file_free_security);
|
|
set_to_dummy_if_null(ops, file_ioctl);
|
|
set_to_dummy_if_null(ops, file_mmap);
|
|
set_to_dummy_if_null(ops, file_mprotect);
|
|
set_to_dummy_if_null(ops, file_lock);
|
|
set_to_dummy_if_null(ops, file_fcntl);
|
|
set_to_dummy_if_null(ops, file_set_fowner);
|
|
set_to_dummy_if_null(ops, file_send_sigiotask);
|
|
set_to_dummy_if_null(ops, file_receive);
|
|
set_to_dummy_if_null(ops, dentry_open);
|
|
set_to_dummy_if_null(ops, task_create);
|
|
set_to_dummy_if_null(ops, task_alloc_security);
|
|
set_to_dummy_if_null(ops, task_free_security);
|
|
set_to_dummy_if_null(ops, task_setuid);
|
|
set_to_dummy_if_null(ops, task_post_setuid);
|
|
set_to_dummy_if_null(ops, task_setgid);
|
|
set_to_dummy_if_null(ops, task_setpgid);
|
|
set_to_dummy_if_null(ops, task_getpgid);
|
|
set_to_dummy_if_null(ops, task_getsid);
|
|
set_to_dummy_if_null(ops, task_getsecid);
|
|
set_to_dummy_if_null(ops, task_setgroups);
|
|
set_to_dummy_if_null(ops, task_setnice);
|
|
set_to_dummy_if_null(ops, task_setioprio);
|
|
set_to_dummy_if_null(ops, task_getioprio);
|
|
set_to_dummy_if_null(ops, task_setrlimit);
|
|
set_to_dummy_if_null(ops, task_setscheduler);
|
|
set_to_dummy_if_null(ops, task_getscheduler);
|
|
set_to_dummy_if_null(ops, task_movememory);
|
|
set_to_dummy_if_null(ops, task_wait);
|
|
set_to_dummy_if_null(ops, task_kill);
|
|
set_to_dummy_if_null(ops, task_prctl);
|
|
set_to_dummy_if_null(ops, task_reparent_to_init);
|
|
set_to_dummy_if_null(ops, task_to_inode);
|
|
set_to_dummy_if_null(ops, ipc_permission);
|
|
set_to_dummy_if_null(ops, msg_msg_alloc_security);
|
|
set_to_dummy_if_null(ops, msg_msg_free_security);
|
|
set_to_dummy_if_null(ops, msg_queue_alloc_security);
|
|
set_to_dummy_if_null(ops, msg_queue_free_security);
|
|
set_to_dummy_if_null(ops, msg_queue_associate);
|
|
set_to_dummy_if_null(ops, msg_queue_msgctl);
|
|
set_to_dummy_if_null(ops, msg_queue_msgsnd);
|
|
set_to_dummy_if_null(ops, msg_queue_msgrcv);
|
|
set_to_dummy_if_null(ops, shm_alloc_security);
|
|
set_to_dummy_if_null(ops, shm_free_security);
|
|
set_to_dummy_if_null(ops, shm_associate);
|
|
set_to_dummy_if_null(ops, shm_shmctl);
|
|
set_to_dummy_if_null(ops, shm_shmat);
|
|
set_to_dummy_if_null(ops, sem_alloc_security);
|
|
set_to_dummy_if_null(ops, sem_free_security);
|
|
set_to_dummy_if_null(ops, sem_associate);
|
|
set_to_dummy_if_null(ops, sem_semctl);
|
|
set_to_dummy_if_null(ops, sem_semop);
|
|
set_to_dummy_if_null(ops, netlink_send);
|
|
set_to_dummy_if_null(ops, netlink_recv);
|
|
set_to_dummy_if_null(ops, register_security);
|
|
set_to_dummy_if_null(ops, d_instantiate);
|
|
set_to_dummy_if_null(ops, getprocattr);
|
|
set_to_dummy_if_null(ops, setprocattr);
|
|
set_to_dummy_if_null(ops, secid_to_secctx);
|
|
set_to_dummy_if_null(ops, release_secctx);
|
|
#ifdef CONFIG_SECURITY_NETWORK
|
|
set_to_dummy_if_null(ops, unix_stream_connect);
|
|
set_to_dummy_if_null(ops, unix_may_send);
|
|
set_to_dummy_if_null(ops, socket_create);
|
|
set_to_dummy_if_null(ops, socket_post_create);
|
|
set_to_dummy_if_null(ops, socket_bind);
|
|
set_to_dummy_if_null(ops, socket_connect);
|
|
set_to_dummy_if_null(ops, socket_listen);
|
|
set_to_dummy_if_null(ops, socket_accept);
|
|
set_to_dummy_if_null(ops, socket_post_accept);
|
|
set_to_dummy_if_null(ops, socket_sendmsg);
|
|
set_to_dummy_if_null(ops, socket_recvmsg);
|
|
set_to_dummy_if_null(ops, socket_getsockname);
|
|
set_to_dummy_if_null(ops, socket_getpeername);
|
|
set_to_dummy_if_null(ops, socket_setsockopt);
|
|
set_to_dummy_if_null(ops, socket_getsockopt);
|
|
set_to_dummy_if_null(ops, socket_shutdown);
|
|
set_to_dummy_if_null(ops, socket_sock_rcv_skb);
|
|
set_to_dummy_if_null(ops, socket_getpeersec_stream);
|
|
set_to_dummy_if_null(ops, socket_getpeersec_dgram);
|
|
set_to_dummy_if_null(ops, sk_alloc_security);
|
|
set_to_dummy_if_null(ops, sk_free_security);
|
|
set_to_dummy_if_null(ops, sk_clone_security);
|
|
set_to_dummy_if_null(ops, sk_getsecid);
|
|
set_to_dummy_if_null(ops, sock_graft);
|
|
set_to_dummy_if_null(ops, inet_conn_request);
|
|
set_to_dummy_if_null(ops, inet_csk_clone);
|
|
set_to_dummy_if_null(ops, inet_conn_established);
|
|
set_to_dummy_if_null(ops, req_classify_flow);
|
|
#endif /* CONFIG_SECURITY_NETWORK */
|
|
#ifdef CONFIG_SECURITY_NETWORK_XFRM
|
|
set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
|
|
set_to_dummy_if_null(ops, xfrm_policy_clone_security);
|
|
set_to_dummy_if_null(ops, xfrm_policy_free_security);
|
|
set_to_dummy_if_null(ops, xfrm_policy_delete_security);
|
|
set_to_dummy_if_null(ops, xfrm_state_alloc_security);
|
|
set_to_dummy_if_null(ops, xfrm_state_free_security);
|
|
set_to_dummy_if_null(ops, xfrm_state_delete_security);
|
|
set_to_dummy_if_null(ops, xfrm_policy_lookup);
|
|
set_to_dummy_if_null(ops, xfrm_state_pol_flow_match);
|
|
set_to_dummy_if_null(ops, xfrm_decode_session);
|
|
#endif /* CONFIG_SECURITY_NETWORK_XFRM */
|
|
#ifdef CONFIG_KEYS
|
|
set_to_dummy_if_null(ops, key_alloc);
|
|
set_to_dummy_if_null(ops, key_free);
|
|
set_to_dummy_if_null(ops, key_permission);
|
|
#endif /* CONFIG_KEYS */
|
|
|
|
}
|
|
|