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Commit 9f9310bf authored by Linus Torvalds's avatar Linus Torvalds
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Merge tag 'selinux-pr-20240105' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux 

Pull selinux updates from Paul Moore:

 - Add a new SELinux initial SID, SECINITSID_INIT, to represent
   userspace processes started before the SELinux policy is loaded in
   early boot.

   Prior to this patch all processes were marked as SECINITSID_KERNEL
   before the SELinux policy was loaded, making it difficult to
   distinquish early boot userspace processes from the kernel in the
   SELinux policy.

   For most users this will be a non-issue as the policy is loaded early
   enough during boot, but for users who load their SELinux policy
   relatively late, this should make it easier to construct meaningful
   security policies.

 - Cleanups to the selinuxfs code by Al, mostly on VFS related issues
   during a policy reload.

   The commit description has more detail, but the quick summary is that
   we are replacing a disconnected directory approach with a temporary
   directory that we swapover at the end of the reload.

 - Fix an issue where the input sanity checking on socket bind()
   operations was slightly different depending on the presence of
   SELinux.

   This is caused by the placement of the LSM hooks in the generic
   socket layer as opposed to the protocol specific bind() handler where
   the protocol specific sanity checks are performed. Mickaël has
   mentioned that he is working to fix this, but in the meantime we just
   ensure that we are replicating the checks properly.

   We need to balance the placement of the LSM hooks with the number of
   LSM hooks; pushing the hooks down into the protocol layers is likely
   not the right answer.

 - Update the avc_has_perm_noaudit() prototype to better match the
   function definition.

 - Migrate from using partial_name_hash() to full_name_hash() the
   filename transition hash table.

   This improves the quality of the code and has the potential for a
   minor performance bump.

 - Consolidate some open coded SELinux access vector comparisions into a
   single new function, avtab_node_cmp(), and use that instead.

   A small, but nice win for code quality and maintainability.

 - Updated the SELinux MAINTAINERS entry with additional information
   around process, bug reporting, etc.

   We're also updating some of our "official" roles: dropping Eric Paris
   and adding Ondrej as a reviewer.

 - Cleanup the coding style crimes in security/selinux/include.

   While I'm not a fan of code churn, I am pushing for more automated
   code checks that can be done at the developer level and one of the
   obvious things to check for is coding style.

   In an effort to start from a "good" base I'm slowly working through
   our source files cleaning them up with the help of clang-format and
   good ol' fashioned human eyeballs; this has the first batch of these
   changes.

   I've been splitting the changes up per-file to help reduce the impact
   if backports are required (either for LTS or distro kernels), and I
   expect the some of the larger files, e.g. hooks.c and ss/services.c,
   will likely need to be split even further.

 - Cleanup old, outdated comments.

* tag 'selinux-pr-20240105' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux: (24 commits)
  selinux: Fix error priority for bind with AF_UNSPEC on PF_INET6 socket
  selinux: fix style issues in security/selinux/include/initial_sid_to_string.h
  selinux: fix style issues in security/selinux/include/xfrm.h
  selinux: fix style issues in security/selinux/include/security.h
  selinux: fix style issues with security/selinux/include/policycap_names.h
  selinux: fix style issues in security/selinux/include/policycap.h
  selinux: fix style issues in security/selinux/include/objsec.h
  selinux: fix style issues with security/selinux/include/netlabel.h
  selinux: fix style issues in security/selinux/include/netif.h
  selinux: fix style issues in security/selinux/include/ima.h
  selinux: fix style issues in security/selinux/include/conditional.h
  selinux: fix style issues in security/selinux/include/classmap.h
  selinux: fix style issues in security/selinux/include/avc_ss.h
  selinux: align avc_has_perm_noaudit() prototype with definition
  selinux: fix style issues in security/selinux/include/avc.h
  selinux: fix style issues in security/selinux/include/audit.h
  MAINTAINERS: drop Eric Paris from his SELinux role
  MAINTAINERS: add Ondrej Mosnacek as a SELinux reviewer
  selinux: remove the wrong comment about multithreaded process handling
  selinux: introduce an initial SID for early boot processes
  ...
parents eab23bc8 bbf5a1d0
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MAINTAINERS
View file @ 9f9310bf
......@@ -19465,12 +19465,14 @@ X: security/selinux/
SELINUX SECURITY MODULE
M: Paul Moore <paul@paul-moore.com>
M: Stephen Smalley <stephen.smalley.work@gmail.com>
M: Eric Paris <eparis@parisplace.org>
R: Ondrej Mosnacek <omosnace@redhat.com>
L: selinux@vger.kernel.org
S: Supported
W: https://selinuxproject.org
W: https://github.com/SELinuxProject
T: git git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git
Q: https://patchwork.kernel.org/project/selinux/list
B: mailto:selinux@vger.kernel.org
P: https://github.com/SELinuxProject/selinux-kernel/blob/main/README.md
T: git https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git
F: Documentation/ABI/removed/sysfs-selinux-checkreqprot
F: Documentation/ABI/removed/sysfs-selinux-disable
F: Documentation/admin-guide/LSM/SELinux.rst
......
security/selinux/hooks.c
View file @ 9f9310bf
......@@ -2313,6 +2313,19 @@ static int selinux_bprm_creds_for_exec(struct linux_binprm *bprm)
new_tsec->keycreate_sid = 0;
new_tsec->sockcreate_sid = 0;
/*
* Before policy is loaded, label any task outside kernel space
* as SECINITSID_INIT, so that any userspace tasks surviving from
* early boot end up with a label different from SECINITSID_KERNEL
* (if the policy chooses to set SECINITSID_INIT != SECINITSID_KERNEL).
*/
if (!selinux_initialized()) {
new_tsec->sid = SECINITSID_INIT;
/* also clear the exec_sid just in case */
new_tsec->exec_sid = 0;
return 0;
}
if (old_tsec->exec_sid) {
new_tsec->sid = old_tsec->exec_sid;
/* Reset exec SID on execve. */
......@@ -4547,6 +4560,21 @@ static int sock_has_perm(struct sock *sk, u32 perms)
if (sksec->sid == SECINITSID_KERNEL)
return 0;
/*
* Before POLICYDB_CAP_USERSPACE_INITIAL_CONTEXT, sockets that
* inherited the kernel context from early boot used to be skipped
* here, so preserve that behavior unless the capability is set.
*
* By setting the capability the policy signals that it is ready
* for this quirk to be fixed. Note that sockets created by a kernel
* thread or a usermode helper executed without a transition will
* still be skipped in this check regardless of the policycap
* setting.
*/
if (!selinux_policycap_userspace_initial_context() &&
sksec->sid == SECINITSID_INIT)
return 0;
ad_net_init_from_sk(&ad, &net, sk);
return avc_has_perm(current_sid(), sksec->sid, sksec->sclass, perms,
......@@ -4661,6 +4689,13 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
return -EINVAL;
addr4 = (struct sockaddr_in *)address;
if (family_sa == AF_UNSPEC) {
if (family == PF_INET6) {
/* Length check from inet6_bind_sk() */
if (addrlen < SIN6_LEN_RFC2133)
return -EINVAL;
/* Family check from __inet6_bind() */
goto err_af;
}
/* see __inet_bind(), we only want to allow
* AF_UNSPEC if the address is INADDR_ANY
*/
......@@ -6425,7 +6460,6 @@ static int selinux_setprocattr(const char *name, void *value, size_t size)
if (sid == 0)
goto abort_change;
/* Only allow single threaded processes to change context */
if (!current_is_single_threaded()) {
error = security_bounded_transition(tsec->sid, sid);
if (error)
......
security/selinux/include/audit.h
View file @ 9f9310bf
......@@ -57,4 +57,3 @@ int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *rule);
int selinux_audit_rule_known(struct audit_krule *rule);
#endif /* _SELINUX_AUDIT_H */
security/selinux/include/avc.h
View file @ 9f9310bf
......@@ -4,6 +4,7 @@
*
* Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
*/
#ifndef _SELINUX_AVC_H_
#define _SELINUX_AVC_H_
......@@ -60,11 +61,8 @@ struct selinux_audit_data {
void __init avc_init(void);
static inline u32 avc_audit_required(u32 requested,
struct av_decision *avd,
int result,
u32 auditdeny,
u32 *deniedp)
static inline u32 avc_audit_required(u32 requested, struct av_decision *avd,
int result, u32 auditdeny, u32 *deniedp)
{
u32 denied, audited;
denied = requested & ~avd->allowed;
......@@ -96,9 +94,8 @@ static inline u32 avc_audit_required(u32 requested,
return audited;
}
int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
u32 requested, u32 audited, u32 denied, int result,
struct common_audit_data *a);
int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass, u32 requested, u32 audited,
u32 denied, int result, struct common_audit_data *a);
/**
* avc_audit - Audit the granting or denial of permissions.
......@@ -119,36 +116,29 @@ int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
* be performed under a lock, to allow the lock to be released
* before calling the auditing code.
*/
static inline int avc_audit(u32 ssid, u32 tsid,
u16 tclass, u32 requested,
struct av_decision *avd,
int result,
static inline int avc_audit(u32 ssid, u32 tsid, u16 tclass, u32 requested,
struct av_decision *avd, int result,
struct common_audit_data *a)
{
u32 audited, denied;
audited = avc_audit_required(requested, avd, result, 0, &denied);
if (likely(!audited))
return 0;
return slow_avc_audit(ssid, tsid, tclass,
requested, audited, denied, result,
a);
return slow_avc_audit(ssid, tsid, tclass, requested, audited, denied,
result, a);
}
#define AVC_STRICT 1 /* Ignore permissive mode. */
#define AVC_EXTENDED_PERMS 2 /* update extended permissions */
int avc_has_perm_noaudit(u32 ssid, u32 tsid,
u16 tclass, u32 requested,
unsigned flags,
struct av_decision *avd);
int avc_has_perm_noaudit(u32 ssid, u32 tsid, u16 tclass, u32 requested,
unsigned int flags, struct av_decision *avd);
int avc_has_perm(u32 ssid, u32 tsid,
u16 tclass, u32 requested,
int avc_has_perm(u32 ssid, u32 tsid, u16 tclass, u32 requested,
struct common_audit_data *auditdata);
int avc_has_extended_perms(u32 ssid, u32 tsid, u16 tclass, u32 requested,
u8 driver, u8 perm, struct common_audit_data *ad);
u32 avc_policy_seqno(void);
#define AVC_CALLBACK_GRANT 1
......@@ -173,4 +163,3 @@ DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
#endif
#endif /* _SELINUX_AVC_H_ */
security/selinux/include/avc_ss.h
View file @ 9f9310bf
......@@ -4,6 +4,7 @@
*
* Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
*/
#ifndef _SELINUX_AVC_SS_H_
#define _SELINUX_AVC_SS_H_
......@@ -20,4 +21,3 @@ struct security_class_mapping {
extern const struct security_class_mapping secclass_map[];
#endif /* _SELINUX_AVC_SS_H_ */
security/selinux/include/classmap.h
View file @ 9f9310bf
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/capability.h>
#include <linux/socket.h>
#define COMMON_FILE_SOCK_PERMS "ioctl", "read", "write", "create", \
"getattr", "setattr", "lock", "relabelfrom", "relabelto", "append", "map"
#define COMMON_FILE_SOCK_PERMS \
"ioctl", "read", "write", "create", "getattr", "setattr", "lock", \
"relabelfrom", "relabelto", "append", "map"
#define COMMON_FILE_PERMS COMMON_FILE_SOCK_PERMS, "unlink", "link", \
"rename", "execute", "quotaon", "mounton", "audit_access", \
"open", "execmod", "watch", "watch_mount", "watch_sb", \
"watch_with_perm", "watch_reads"
#define COMMON_FILE_PERMS \
COMMON_FILE_SOCK_PERMS, "unlink", "link", "rename", "execute", \
"quotaon", "mounton", "audit_access", "open", "execmod", \
"watch", "watch_mount", "watch_sb", "watch_with_perm", \
"watch_reads"
#define COMMON_SOCK_PERMS COMMON_FILE_SOCK_PERMS, "bind", "connect", \
"listen", "accept", "getopt", "setopt", "shutdown", "recvfrom", \
"sendto", "name_bind"
#define COMMON_SOCK_PERMS \
COMMON_FILE_SOCK_PERMS, "bind", "connect", "listen", "accept", \
"getopt", "setopt", "shutdown", "recvfrom", "sendto", \
"name_bind"
#define COMMON_IPC_PERMS "create", "destroy", "getattr", "setattr", "read", \
"write", "associate", "unix_read", "unix_write"
#define COMMON_IPC_PERMS \
"create", "destroy", "getattr", "setattr", "read", "write", \
"associate", "unix_read", "unix_write"
#define COMMON_CAP_PERMS "chown", "dac_override", "dac_read_search", \
"fowner", "fsetid", "kill", "setgid", "setuid", "setpcap", \
"linux_immutable", "net_bind_service", "net_broadcast", \
"net_admin", "net_raw", "ipc_lock", "ipc_owner", "sys_module", \
"sys_rawio", "sys_chroot", "sys_ptrace", "sys_pacct", "sys_admin", \
#define COMMON_CAP_PERMS \
"chown", "dac_override", "dac_read_search", "fowner", "fsetid", \
"kill", "setgid", "setuid", "setpcap", "linux_immutable", \
"net_bind_service", "net_broadcast", "net_admin", "net_raw", \
"ipc_lock", "ipc_owner", "sys_module", "sys_rawio", \
"sys_chroot", "sys_ptrace", "sys_pacct", "sys_admin", \
"sys_boot", "sys_nice", "sys_resource", "sys_time", \
"sys_tty_config", "mknod", "lease", "audit_write", \
"audit_control", "setfcap"
#define COMMON_CAP2_PERMS "mac_override", "mac_admin", "syslog", \
"wake_alarm", "block_suspend", "audit_read", "perfmon", "bpf", \
"checkpoint_restore"
#define COMMON_CAP2_PERMS \
"mac_override", "mac_admin", "syslog", "wake_alarm", "block_suspend", \
"audit_read", "perfmon", "bpf", "checkpoint_restore"
#if CAP_LAST_CAP > CAP_CHECKPOINT_RESTORE
#error New capability defined, please update COMMON_CAP2_PERMS.
......@@ -40,224 +46,140 @@
*/
const struct security_class_mapping secclass_map[] = {
{ "security",
{ "compute_av", "compute_create", "compute_member",
"check_context", "load_policy", "compute_relabel",
"compute_user", "setenforce", "setbool", "setsecparam",
"setcheckreqprot", "read_policy", "validate_trans", NULL } },
{ "compute_av", "compute_create", "compute_member", "check_context",
"load_policy", "compute_relabel", "compute_user", "setenforce",
"setbool", "setsecparam", "setcheckreqprot", "read_policy",
"validate_trans", NULL } },
{ "process",
{ "fork", "transition", "sigchld", "sigkill",
"sigstop", "signull", "signal", "ptrace", "getsched", "setsched",
"getsession", "getpgid", "setpgid", "getcap", "setcap", "share",
"getattr", "setexec", "setfscreate", "noatsecure", "siginh",
"setrlimit", "rlimitinh", "dyntransition", "setcurrent",
"execmem", "execstack", "execheap", "setkeycreate",
"setsockcreate", "getrlimit", NULL } },
{ "process2",
{ "nnp_transition", "nosuid_transition", NULL } },
"sigstop", "signull", "signal", "ptrace",
"getsched", "setsched", "getsession", "getpgid",
"setpgid", "getcap", "setcap", "share",
"getattr", "setexec", "setfscreate", "noatsecure",
"siginh", "setrlimit", "rlimitinh", "dyntransition",
"setcurrent", "execmem", "execstack", "execheap",
"setkeycreate", "setsockcreate", "getrlimit", NULL } },
{ "process2", { "nnp_transition", "nosuid_transition", NULL } },
{ "system",
{ "ipc_info", "syslog_read", "syslog_mod",
"syslog_console", "module_request", "module_load", NULL } },
{ "capability",
{ COMMON_CAP_PERMS, NULL } },
{ "ipc_info", "syslog_read", "syslog_mod", "syslog_console",
"module_request", "module_load", NULL } },
{ "capability", { COMMON_CAP_PERMS, NULL } },
{ "filesystem",
{ "mount", "remount", "unmount", "getattr",
"relabelfrom", "relabelto", "associate", "quotamod",
"quotaget", "watch", NULL } },
{ "mount", "remount", "unmount", "getattr", "relabelfrom",
"relabelto", "associate", "quotamod", "quotaget", "watch", NULL } },
{ "file",
{ COMMON_FILE_PERMS,
"execute_no_trans", "entrypoint", NULL } },
{ COMMON_FILE_PERMS, "execute_no_trans", "entrypoint", NULL } },
{ "dir",
{ COMMON_FILE_PERMS, "add_name", "remove_name",
"reparent", "search", "rmdir", NULL } },
{ COMMON_FILE_PERMS, "add_name", "remove_name", "reparent", "search",
"rmdir", NULL } },
{ "fd", { "use", NULL } },
{ "lnk_file",
{ COMMON_FILE_PERMS, NULL } },
{ "chr_file",
{ COMMON_FILE_PERMS, NULL } },
{ "blk_file",
{ COMMON_FILE_PERMS, NULL } },
{ "sock_file",
{ COMMON_FILE_PERMS, NULL } },
{ "fifo_file",
{ COMMON_FILE_PERMS, NULL } },
{ "socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "lnk_file", { COMMON_FILE_PERMS, NULL } },
{ "chr_file", { COMMON_FILE_PERMS, NULL } },
{ "blk_file", { COMMON_FILE_PERMS, NULL } },
{ "sock_file", { COMMON_FILE_PERMS, NULL } },
{ "fifo_file", { COMMON_FILE_PERMS, NULL } },
{ "socket", { COMMON_SOCK_PERMS, NULL } },
{ "tcp_socket",
{ COMMON_SOCK_PERMS,
"node_bind", "name_connect",
NULL } },
{ "udp_socket",
{ COMMON_SOCK_PERMS,
"node_bind", NULL } },
{ "rawip_socket",
{ COMMON_SOCK_PERMS,
"node_bind", NULL } },
{ "node",
{ "recvfrom", "sendto", NULL } },
{ "netif",
{ "ingress", "egress", NULL } },
{ "netlink_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "packet_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "key_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "unix_stream_socket",
{ COMMON_SOCK_PERMS, "connectto", NULL } },
{ "unix_dgram_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "sem",
{ COMMON_IPC_PERMS, NULL } },
{ COMMON_SOCK_PERMS, "node_bind", "name_connect", NULL } },
{ "udp_socket", { COMMON_SOCK_PERMS, "node_bind", NULL } },
{ "rawip_socket", { COMMON_SOCK_PERMS, "node_bind", NULL } },
{ "node", { "recvfrom", "sendto", NULL } },
{ "netif", { "ingress", "egress", NULL } },
{ "netlink_socket", { COMMON_SOCK_PERMS, NULL } },
{ "packet_socket", { COMMON_SOCK_PERMS, NULL } },
{ "key_socket", { COMMON_SOCK_PERMS, NULL } },
{ "unix_stream_socket", { COMMON_SOCK_PERMS, "connectto", NULL } },
{ "unix_dgram_socket", { COMMON_SOCK_PERMS, NULL } },
{ "sem", { COMMON_IPC_PERMS, NULL } },
{ "msg", { "send", "receive", NULL } },
{ "msgq",
{ COMMON_IPC_PERMS, "enqueue", NULL } },
{ "shm",
{ COMMON_IPC_PERMS, "lock", NULL } },
{ "ipc",
{ COMMON_IPC_PERMS, NULL } },
{ "msgq", { COMMON_IPC_PERMS, "enqueue", NULL } },
{ "shm", { COMMON_IPC_PERMS, "lock", NULL } },
{ "ipc", { COMMON_IPC_PERMS, NULL } },
{ "netlink_route_socket",
{ COMMON_SOCK_PERMS,
"nlmsg_read", "nlmsg_write", NULL } },
{ COMMON_SOCK_PERMS, "nlmsg_read", "nlmsg_write", NULL } },
{ "netlink_tcpdiag_socket",
{ COMMON_SOCK_PERMS,
"nlmsg_read", "nlmsg_write", NULL } },
{ "netlink_nflog_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ COMMON_SOCK_PERMS, "nlmsg_read", "nlmsg_write", NULL } },
{ "netlink_nflog_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_xfrm_socket",
{ COMMON_SOCK_PERMS,
"nlmsg_read", "nlmsg_write", NULL } },
{ "netlink_selinux_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_iscsi_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ COMMON_SOCK_PERMS, "nlmsg_read", "nlmsg_write", NULL } },
{ "netlink_selinux_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_iscsi_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_audit_socket",
{ COMMON_SOCK_PERMS,
"nlmsg_read", "nlmsg_write", "nlmsg_relay", "nlmsg_readpriv",
"nlmsg_tty_audit", NULL } },
{ "netlink_fib_lookup_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_connector_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_netfilter_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_dnrt_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ COMMON_SOCK_PERMS, "nlmsg_read", "nlmsg_write", "nlmsg_relay",
"nlmsg_readpriv", "nlmsg_tty_audit", NULL } },
{ "netlink_fib_lookup_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_connector_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_netfilter_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_dnrt_socket", { COMMON_SOCK_PERMS, NULL } },
{ "association",
{ "sendto", "recvfrom", "setcontext", "polmatch", NULL } },
{ "netlink_kobject_uevent_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_generic_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_scsitransport_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_rdma_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_crypto_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "appletalk_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netlink_kobject_uevent_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_generic_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_scsitransport_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_rdma_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netlink_crypto_socket", { COMMON_SOCK_PERMS, NULL } },
{ "appletalk_socket", { COMMON_SOCK_PERMS, NULL } },
{ "packet",
{ "send", "recv", "relabelto", "forward_in", "forward_out", NULL } },
{ "key",
{ "view", "read", "write", "search", "link", "setattr", "create",
NULL } },
{ "dccp_socket",
{ COMMON_SOCK_PERMS,
"node_bind", "name_connect", NULL } },
{ COMMON_SOCK_PERMS, "node_bind", "name_connect", NULL } },
{ "memprotect", { "mmap_zero", NULL } },
{ "peer", { "recv", NULL } },
{ "capability2",
{ COMMON_CAP2_PERMS, NULL } },
{ "capability2", { COMMON_CAP2_PERMS, NULL } },
{ "kernel_service", { "use_as_override", "create_files_as", NULL } },
{ "tun_socket",
{ COMMON_SOCK_PERMS, "attach_queue", NULL } },
{ "binder", { "impersonate", "call", "set_context_mgr", "transfer",
NULL } },
{ "cap_userns",
{ COMMON_CAP_PERMS, NULL } },
{ "cap2_userns",
{ COMMON_CAP2_PERMS, NULL } },
{ "tun_socket", { COMMON_SOCK_PERMS, "attach_queue", NULL } },
{ "binder",
{ "impersonate", "call", "set_context_mgr", "transfer", NULL } },
{ "cap_userns", { COMMON_CAP_PERMS, NULL } },
{ "cap2_userns", { COMMON_CAP2_PERMS, NULL } },
{ "sctp_socket",
{ COMMON_SOCK_PERMS,
"node_bind", "name_connect", "association", NULL } },
{ "icmp_socket",
{ COMMON_SOCK_PERMS,
"node_bind", NULL } },
{ "ax25_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "ipx_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "netrom_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "atmpvc_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "x25_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "rose_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "decnet_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "atmsvc_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "rds_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "irda_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "pppox_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "llc_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "can_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "tipc_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "bluetooth_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "iucv_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "rxrpc_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "isdn_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "phonet_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "ieee802154_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "caif_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "alg_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "nfc_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "vsock_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "kcm_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "qipcrtr_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "smc_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "infiniband_pkey",
{ "access", NULL } },
{ "infiniband_endport",
{ "manage_subnet", NULL } },
{ COMMON_SOCK_PERMS, "node_bind", "name_connect", "association",
NULL } },
{ "icmp_socket", { COMMON_SOCK_PERMS, "node_bind", NULL } },
{ "ax25_socket", { COMMON_SOCK_PERMS, NULL } },
{ "ipx_socket", { COMMON_SOCK_PERMS, NULL } },
{ "netrom_socket", { COMMON_SOCK_PERMS, NULL } },
{ "atmpvc_socket", { COMMON_SOCK_PERMS, NULL } },
{ "x25_socket", { COMMON_SOCK_PERMS, NULL } },
{ "rose_socket", { COMMON_SOCK_PERMS, NULL } },
{ "decnet_socket", { COMMON_SOCK_PERMS, NULL } },
{ "atmsvc_socket", { COMMON_SOCK_PERMS, NULL } },
{ "rds_socket", { COMMON_SOCK_PERMS, NULL } },
{ "irda_socket", { COMMON_SOCK_PERMS, NULL } },
{ "pppox_socket", { COMMON_SOCK_PERMS, NULL } },
{ "llc_socket", { COMMON_SOCK_PERMS, NULL } },
{ "can_socket", { COMMON_SOCK_PERMS, NULL } },
{ "tipc_socket", { COMMON_SOCK_PERMS, NULL } },
{ "bluetooth_socket", { COMMON_SOCK_PERMS, NULL } },
{ "iucv_socket", { COMMON_SOCK_PERMS, NULL } },
{ "rxrpc_socket", { COMMON_SOCK_PERMS, NULL } },
{ "isdn_socket", { COMMON_SOCK_PERMS, NULL } },
{ "phonet_socket", { COMMON_SOCK_PERMS, NULL } },
{ "ieee802154_socket", { COMMON_SOCK_PERMS, NULL } },
{ "caif_socket", { COMMON_SOCK_PERMS, NULL } },
{ "alg_socket", { COMMON_SOCK_PERMS, NULL } },
{ "nfc_socket", { COMMON_SOCK_PERMS, NULL } },
{ "vsock_socket", { COMMON_SOCK_PERMS, NULL } },
{ "kcm_socket", { COMMON_SOCK_PERMS, NULL } },
{ "qipcrtr_socket", { COMMON_SOCK_PERMS, NULL } },
{ "smc_socket", { COMMON_SOCK_PERMS, NULL } },
{ "infiniband_pkey", { "access", NULL } },
{ "infiniband_endport", { "manage_subnet", NULL } },
{ "bpf",
{ "map_create", "map_read", "map_write", "prog_load", "prog_run",
NULL } },
{ "xdp_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "mctp_socket",
{ COMMON_SOCK_PERMS, NULL } },
{ "xdp_socket", { COMMON_SOCK_PERMS, NULL } },
{ "mctp_socket", { COMMON_SOCK_PERMS, NULL } },
{ "perf_event",
{ "open", "cpu", "kernel", "tracepoint", "read", "write", NULL } },
{ "anon_inode",
{ COMMON_FILE_PERMS, NULL } },
{ "io_uring",
{ "override_creds", "sqpoll", "cmd", NULL } },
{ "user_namespace",
{ "create", NULL } },
{ "anon_inode", { COMMON_FILE_PERMS, NULL } },
{ "io_uring", { "override_creds", "sqpoll", "cmd", NULL } },
{ "user_namespace", { "create", NULL } },
{ NULL }
};
};
#if PF_MAX > 46
#error New address family defined, please update secclass_map.
......
security/selinux/include/conditional.h
View file @ 9f9310bf
......@@ -13,8 +13,8 @@
#include "security.h"
int security_get_bools(struct selinux_policy *policy,
u32 *len, char ***names, int **values);
int security_get_bools(struct selinux_policy *policy, u32 *len, char ***names,
int **values);
int security_set_bools(u32 len, int *values);
......
security/selinux/include/initial_sid_to_string.h
View file @ 9f9310bf
......@@ -3,33 +3,32 @@
#include <linux/stddef.h>
static const char *const initial_sid_to_string[] = {
NULL,
"kernel",
"security",
"unlabeled",
NULL,
"file",
NULL,
NULL,
"any_socket",
"port",
"netif",
"netmsg",
"node",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
"devnull",
NULL, /* zero placeholder, not used */
"kernel", /* kernel / SECINITSID_KERNEL */
"security", /* security / SECINITSID_SECURITY */
"unlabeled", /* unlabeled / SECINITSID_UNLABELED */
NULL, /* fs */
"file", /* file / SECINITSID_FILE */
NULL, /* file_labels */
"init", /* init / SECINITSID_INIT */
"any_socket", /* any_socket / SECINITSID_ANY_SOCKET */
"port", /* port / SECINITSID_PORT */
"netif", /* netif / SECINITSID_NETIF */
"netmsg", /* netmsg / SECINITSID_NETMSG */
"node", /* node / SECINITSID_NODE */
NULL, /* igmp_packet */
NULL, /* icmp_socket */
NULL, /* tcp_socket */
NULL, /* sysctl_modprobe */
NULL, /* sysctl */
NULL, /* sysctl_fs */
NULL, /* sysctl_kernel */
NULL, /* sysctl_net */
NULL, /* sysctl_net_unix */
NULL, /* sysctl_vm */
NULL, /* sysctl_dev */
NULL, /* kmod */
NULL, /* policy */
NULL, /* scmp_packet */
"devnull", /* devnull / SECINITSID_DEVNULL */
};
security/selinux/include/netif.h
View file @ 9f9310bf
......@@ -11,6 +11,7 @@
* Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
* Paul Moore <paul@paul-moore.com>
*/
#ifndef _SELINUX_NETIF_H_
#define _SELINUX_NETIF_H_
......@@ -21,4 +22,3 @@ void sel_netif_flush(void);
int sel_netif_sid(struct net *ns, int ifindex, u32 *sid);
#endif /* _SELINUX_NETIF_H_ */
security/selinux/include/netlabel.h
View file @ 9f9310bf
......@@ -32,13 +32,9 @@ void selinux_netlbl_err(struct sk_buff *skb, u16 family, int error,
void selinux_netlbl_sk_security_free(struct sk_security_struct *sksec);
void selinux_netlbl_sk_security_reset(struct sk_security_struct *sksec);
int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
u16 family,
u32 *type,
int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, u16 family, u32 *type,
u32 *sid);
int selinux_netlbl_skbuff_setsid(struct sk_buff *skb,
u16 family,
u32 sid);
int selinux_netlbl_skbuff_setsid(struct sk_buff *skb, u16 family, u32 sid);
int selinux_netlbl_sctp_assoc_request(struct sctp_association *asoc,
struct sk_buff *skb);
int selinux_netlbl_inet_conn_request(struct request_sock *req, u16 family);
......@@ -46,11 +42,9 @@ void selinux_netlbl_inet_csk_clone(struct sock *sk, u16 family);
void selinux_netlbl_sctp_sk_clone(struct sock *sk, struct sock *newsk);
int selinux_netlbl_socket_post_create(struct sock *sk, u16 family);
int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
struct sk_buff *skb,
u16 family,
struct sk_buff *skb, u16 family,
struct common_audit_data *ad);
int selinux_netlbl_socket_setsockopt(struct socket *sock,
int level,
int selinux_netlbl_socket_setsockopt(struct socket *sock, int level,
int optname);
int selinux_netlbl_socket_connect(struct sock *sk, struct sockaddr *addr);
int selinux_netlbl_socket_connect_locked(struct sock *sk,
......@@ -62,43 +56,39 @@ static inline void selinux_netlbl_cache_invalidate(void)
return;
}
static inline void selinux_netlbl_err(struct sk_buff *skb,
u16 family,
int error,
int gateway)
static inline void selinux_netlbl_err(struct sk_buff *skb, u16 family,
int error, int gateway)
{
return;
}
static inline void selinux_netlbl_sk_security_free(
struct sk_security_struct *sksec)
static inline void
selinux_netlbl_sk_security_free(struct sk_security_struct *sksec)
{
return;
}
static inline void selinux_netlbl_sk_security_reset(
struct sk_security_struct *sksec)
static inline void
selinux_netlbl_sk_security_reset(struct sk_security_struct *sksec)
{
return;
}
static inline int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
u16 family,
u32 *type,
u32 *sid)
static inline int selinux_netlbl_skbuff_getsid(struct sk_buff *skb, u16 family,
u32 *type, u32 *sid)
{
*type = NETLBL_NLTYPE_NONE;
*sid = SECSID_NULL;
return 0;
}
static inline int selinux_netlbl_skbuff_setsid(struct sk_buff *skb,
u16 family,
static inline int selinux_netlbl_skbuff_setsid(struct sk_buff *skb, u16 family,
u32 sid)
{
return 0;
}
static inline int selinux_netlbl_sctp_assoc_request(struct sctp_association *asoc,
static inline int
selinux_netlbl_sctp_assoc_request(struct sctp_association *asoc,
struct sk_buff *skb)
{
return 0;
......@@ -117,21 +107,18 @@ static inline void selinux_netlbl_sctp_sk_clone(struct sock *sk,
{
return;
}
static inline int selinux_netlbl_socket_post_create(struct sock *sk,
u16 family)
static inline int selinux_netlbl_socket_post_create(struct sock *sk, u16 family)
{
return 0;
}
static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
struct sk_buff *skb,
u16 family,
struct sk_buff *skb, u16 family,
struct common_audit_data *ad)
{
return 0;
}
static inline int selinux_netlbl_socket_setsockopt(struct socket *sock,
int level,
int optname)
int level, int optname)
{
return 0;
}
......
security/selinux/include/objsec.h
View file @ 9f9310bf
......@@ -13,6 +13,7 @@
* Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
* Copyright (C) 2016 Mellanox Technologies
*/
#ifndef _SELINUX_OBJSEC_H_
#define _SELINUX_OBJSEC_H_
......@@ -158,22 +159,22 @@ static inline struct file_security_struct *selinux_file(const struct file *file)
return file->f_security + selinux_blob_sizes.lbs_file;
}
static inline struct inode_security_struct *selinux_inode(
const struct inode *inode)
static inline struct inode_security_struct *
selinux_inode(const struct inode *inode)
{
if (unlikely(!inode->i_security))
return NULL;
return inode->i_security + selinux_blob_sizes.lbs_inode;
}
static inline struct msg_security_struct *selinux_msg_msg(
const struct msg_msg *msg_msg)
static inline struct msg_security_struct *
selinux_msg_msg(const struct msg_msg *msg_msg)
{
return msg_msg->security + selinux_blob_sizes.lbs_msg_msg;
}
static inline struct ipc_security_struct *selinux_ipc(
const struct kern_ipc_perm *ipc)
static inline struct ipc_security_struct *
selinux_ipc(const struct kern_ipc_perm *ipc)
{
return ipc->security + selinux_blob_sizes.lbs_ipc;
}
......@@ -188,8 +189,8 @@ static inline u32 current_sid(void)
return tsec->sid;
}
static inline struct superblock_security_struct *selinux_superblock(
const struct super_block *superblock)
static inline struct superblock_security_struct *
selinux_superblock(const struct super_block *superblock)
{
return superblock->s_security + selinux_blob_sizes.lbs_superblock;
}
......
security/selinux/include/policycap.h
View file @ 9f9310bf
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SELINUX_POLICYCAP_H_
#define _SELINUX_POLICYCAP_H_
......@@ -12,6 +13,7 @@ enum {
POLICYDB_CAP_NNP_NOSUID_TRANSITION,
POLICYDB_CAP_GENFS_SECLABEL_SYMLINKS,
POLICYDB_CAP_IOCTL_SKIP_CLOEXEC,
POLICYDB_CAP_USERSPACE_INITIAL_CONTEXT,
__POLICYDB_CAP_MAX
};
#define POLICYDB_CAP_MAX (__POLICYDB_CAP_MAX - 1)
......
security/selinux/include/policycap_names.h
View file @ 9f9310bf
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SELINUX_POLICYCAP_NAMES_H_
#define _SELINUX_POLICYCAP_NAMES_H_
#include "policycap.h"
/* clang-format off */
/* Policy capability names */
const char *const selinux_policycap_names[__POLICYDB_CAP_MAX] = {
"network_peer_controls",
......@@ -14,6 +16,8 @@ const char *const selinux_policycap_names[__POLICYDB_CAP_MAX] = {
"nnp_nosuid_transition",
"genfs_seclabel_symlinks",
"ioctl_skip_cloexec",
"userspace_initial_context",
};
/* clang-format on */
#endif /* _SELINUX_POLICYCAP_NAMES_H_ */
security/selinux/include/security.h
View file @ 9f9310bf
......@@ -189,6 +189,12 @@ static inline bool selinux_policycap_ioctl_skip_cloexec(void)
selinux_state.policycap[POLICYDB_CAP_IOCTL_SKIP_CLOEXEC]);
}
static inline bool selinux_policycap_userspace_initial_context(void)
{
return READ_ONCE(
selinux_state.policycap[POLICYDB_CAP_USERSPACE_INITIAL_CONTEXT]);
}
struct selinux_policy_convert_data;
struct selinux_load_state {
......@@ -218,8 +224,8 @@ struct av_decision {
#define XPERMS_AUDITALLOW 2
#define XPERMS_DONTAUDIT 4
#define security_xperm_set(perms, x) ((perms)[(x) >> 5] |= 1 << ((x) & 0x1f))
#define security_xperm_test(perms, x) (1 & ((perms)[(x) >> 5] >> ((x) & 0x1f)))
#define security_xperm_set(perms, x) ((perms)[(x) >> 5] |= 1 << ((x)&0x1f))
#define security_xperm_test(perms, x) (1 & ((perms)[(x) >> 5] >> ((x)&0x1f)))
struct extended_perms_data {
u32 p[8];
};
......@@ -240,16 +246,15 @@ struct extended_perms {
/* definitions of av_decision.flags */
#define AVD_FLAGS_PERMISSIVE 0x0001
void security_compute_av(u32 ssid, u32 tsid,
u16 tclass, struct av_decision *avd,
void security_compute_av(u32 ssid, u32 tsid, u16 tclass,
struct av_decision *avd,
struct extended_perms *xperms);
void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
u8 driver,
void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass, u8 driver,
struct extended_perms_decision *xpermd);
void security_compute_av_user(u32 ssid, u32 tsid,
u16 tclass, struct av_decision *avd);
void security_compute_av_user(u32 ssid, u32 tsid, u16 tclass,
struct av_decision *avd);
int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
const struct qstr *qstr, u32 *out_sid);
......@@ -288,8 +293,7 @@ int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid);
int security_netif_sid(char *name, u32 *if_sid);
int security_node_sid(u16 domain, void *addr, u32 addrlen,
u32 *out_sid);
int security_node_sid(u16 domain, void *addr, u32 addrlen, u32 *out_sid);
int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
u16 tclass);
......@@ -301,14 +305,13 @@ int security_bounded_transition(u32 oldsid, u32 newsid);
int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
u32 xfrm_sid,
int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, u32 xfrm_sid,
u32 *peer_sid);
int security_get_classes(struct selinux_policy *policy,
char ***classes, u32 *nclasses);
int security_get_permissions(struct selinux_policy *policy,
const char *class, char ***perms, u32 *nperms);
int security_get_classes(struct selinux_policy *policy, char ***classes,
u32 *nclasses);
int security_get_permissions(struct selinux_policy *policy, const char *class,
char ***perms, u32 *nperms);
int security_get_reject_unknown(void);
int security_get_allow_unknown(void);
......@@ -326,25 +329,23 @@ int security_fs_use(struct super_block *sb);
int security_genfs_sid(const char *fstype, const char *path, u16 sclass,
u32 *sid);
int selinux_policy_genfs_sid(struct selinux_policy *policy,
const char *fstype, const char *path, u16 sclass,
u32 *sid);
int selinux_policy_genfs_sid(struct selinux_policy *policy, const char *fstype,
const char *path, u16 sclass, u32 *sid);
#ifdef CONFIG_NETLABEL
int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
u32 *sid);
int security_netlbl_sid_to_secattr(u32 sid,
struct netlbl_lsm_secattr *secattr);
int security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr);
#else
static inline int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
u32 *sid)
static inline int
security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, u32 *sid)
{
return -EIDRM;
}
static inline int security_netlbl_sid_to_secattr(u32 sid,
struct netlbl_lsm_secattr *secattr)
static inline int
security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr)
{
return -ENOENT;
}
......
security/selinux/include/xfrm.h
View file @ 9f9310bf
......@@ -5,6 +5,7 @@
* Author : Trent Jaeger, <jaegert@us.ibm.com>
* Updated : Venkat Yekkirala, <vyekkirala@TrustedCS.com>
*/
#ifndef _SELINUX_XFRM_H_
#define _SELINUX_XFRM_H_
......@@ -13,8 +14,7 @@
#include <net/xfrm.h>
int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
struct xfrm_user_sec_ctx *uctx,
gfp_t gfp);
struct xfrm_user_sec_ctx *uctx, gfp_t gfp);
int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
struct xfrm_sec_ctx **new_ctxp);
void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
......
security/selinux/selinuxfs.c
View file @ 9f9310bf
......@@ -336,12 +336,9 @@ static struct dentry *sel_make_dir(struct dentry *dir, const char *name,
unsigned long *ino);
/* declaration for sel_make_policy_nodes */
static struct dentry *sel_make_disconnected_dir(struct super_block *sb,
static struct dentry *sel_make_swapover_dir(struct super_block *sb,
unsigned long *ino);
/* declaration for sel_make_policy_nodes */
static void sel_remove_entries(struct dentry *de);
static ssize_t sel_read_mls(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
......@@ -508,13 +505,13 @@ static int sel_make_policy_nodes(struct selinux_fs_info *fsi,
struct selinux_policy *newpolicy)
{
int ret = 0;
struct dentry *tmp_parent, *tmp_bool_dir, *tmp_class_dir, *old_dentry;
unsigned int tmp_bool_num, old_bool_num;
char **tmp_bool_names, **old_bool_names;
int *tmp_bool_values, *old_bool_values;
struct dentry *tmp_parent, *tmp_bool_dir, *tmp_class_dir;
unsigned int bool_num = 0;
char **bool_names = NULL;
int *bool_values = NULL;
unsigned long tmp_ino = fsi->last_ino; /* Don't increment last_ino in this function */
tmp_parent = sel_make_disconnected_dir(fsi->sb, &tmp_ino);
tmp_parent = sel_make_swapover_dir(fsi->sb, &tmp_ino);
if (IS_ERR(tmp_parent))
return PTR_ERR(tmp_parent);
......@@ -532,8 +529,8 @@ static int sel_make_policy_nodes(struct selinux_fs_info *fsi,
goto out;
}
ret = sel_make_bools(newpolicy, tmp_bool_dir, &tmp_bool_num,
&tmp_bool_names, &tmp_bool_values);
ret = sel_make_bools(newpolicy, tmp_bool_dir, &bool_num,
&bool_names, &bool_values);
if (ret)
goto out;
......@@ -542,38 +539,30 @@ static int sel_make_policy_nodes(struct selinux_fs_info *fsi,
if (ret)
goto out;
lock_rename(tmp_parent, fsi->sb->s_root);
/* booleans */
old_dentry = fsi->bool_dir;
lock_rename(tmp_bool_dir, old_dentry);
d_exchange(tmp_bool_dir, fsi->bool_dir);
old_bool_num = fsi->bool_num;
old_bool_names = fsi->bool_pending_names;
old_bool_values = fsi->bool_pending_values;
fsi->bool_num = tmp_bool_num;
fsi->bool_pending_names = tmp_bool_names;
fsi->bool_pending_values = tmp_bool_values;
sel_remove_old_bool_data(old_bool_num, old_bool_names, old_bool_values);
swap(fsi->bool_num, bool_num);
swap(fsi->bool_pending_names, bool_names);
swap(fsi->bool_pending_values, bool_values);
fsi->bool_dir = tmp_bool_dir;
unlock_rename(tmp_bool_dir, old_dentry);
/* classes */
old_dentry = fsi->class_dir;
lock_rename(tmp_class_dir, old_dentry);
d_exchange(tmp_class_dir, fsi->class_dir);
fsi->class_dir = tmp_class_dir;
unlock_rename(tmp_class_dir, old_dentry);
unlock_rename(tmp_parent, fsi->sb->s_root);
out:
sel_remove_old_bool_data(bool_num, bool_names, bool_values);
/* Since the other temporary dirs are children of tmp_parent
* this will handle all the cleanup in the case of a failure before
* the swapover
*/
sel_remove_entries(tmp_parent);
dput(tmp_parent); /* d_genocide() only handles the children */
simple_recursive_removal(tmp_parent, NULL);
return ret;
}
......@@ -1351,54 +1340,48 @@ static const struct file_operations sel_commit_bools_ops = {
.llseek = generic_file_llseek,
};
static void sel_remove_entries(struct dentry *de)
{
d_genocide(de);
shrink_dcache_parent(de);
}
static int sel_make_bools(struct selinux_policy *newpolicy, struct dentry *bool_dir,
unsigned int *bool_num, char ***bool_pending_names,
int **bool_pending_values)
{
int ret;
ssize_t len;
struct dentry *dentry = NULL;
struct inode *inode = NULL;
struct inode_security_struct *isec;
char **names = NULL, *page;
char **names, *page;
u32 i, num;
int *values = NULL;
u32 sid;
ret = -ENOMEM;
page = (char *)get_zeroed_page(GFP_KERNEL);
if (!page)
goto out;
return -ENOMEM;
ret = security_get_bools(newpolicy, &num, &names, &values);
ret = security_get_bools(newpolicy, &num, &names, bool_pending_values);
if (ret)
goto out;
*bool_num = num;
*bool_pending_names = names;
for (i = 0; i < num; i++) {
ret = -ENOMEM;
dentry = d_alloc_name(bool_dir, names[i]);
if (!dentry)
goto out;
struct dentry *dentry;
struct inode *inode;
struct inode_security_struct *isec;
ssize_t len;
u32 sid;
len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]);
if (len >= PAGE_SIZE) {
ret = -ENAMETOOLONG;
break;
}
dentry = d_alloc_name(bool_dir, names[i]);
if (!dentry) {
ret = -ENOMEM;
inode = sel_make_inode(bool_dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR);
if (!inode) {
dput(dentry);
goto out;
break;
}
ret = -ENAMETOOLONG;
len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]);
if (len >= PAGE_SIZE) {
inode = sel_make_inode(bool_dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR);
if (!inode) {
dput(dentry);
iput(inode);
goto out;
ret = -ENOMEM;
break;
}
isec = selinux_inode(inode);
......@@ -1416,23 +1399,8 @@ static int sel_make_bools(struct selinux_policy *newpolicy, struct dentry *bool_
inode->i_ino = i|SEL_BOOL_INO_OFFSET;
d_add(dentry, inode);
}
*bool_num = num;
*bool_pending_names = names;
*bool_pending_values = values;
free_page((unsigned long)page);
return 0;
out:
free_page((unsigned long)page);
if (names) {
for (i = 0; i < num; i++)
kfree(names[i]);
kfree(names);
}
kfree(values);
sel_remove_entries(bool_dir);
return ret;
}
......@@ -1961,20 +1929,40 @@ static struct dentry *sel_make_dir(struct dentry *dir, const char *name,
return dentry;
}
static struct dentry *sel_make_disconnected_dir(struct super_block *sb,
static int reject_all(struct mnt_idmap *idmap, struct inode *inode, int mask)
{
return -EPERM; // no access for anyone, root or no root.
}
static const struct inode_operations swapover_dir_inode_operations = {
.lookup = simple_lookup,
.permission = reject_all,
};
static struct dentry *sel_make_swapover_dir(struct super_block *sb,
unsigned long *ino)
{
struct inode *inode = sel_make_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO);
struct dentry *dentry = d_alloc_name(sb->s_root, ".swapover");
struct inode *inode;
if (!inode)
if (!dentry)
return ERR_PTR(-ENOMEM);
inode->i_op = &simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
inode = sel_make_inode(sb, S_IFDIR);
if (!inode) {
dput(dentry);
return ERR_PTR(-ENOMEM);
}
inode->i_op = &swapover_dir_inode_operations;
inode->i_ino = ++(*ino);
/* directory inodes start off with i_nlink == 2 (for "." entry) */
inc_nlink(inode);
return d_obtain_alias(inode);
inode_lock(sb->s_root->d_inode);
d_add(dentry, inode);
inc_nlink(sb->s_root->d_inode);
inode_unlock(sb->s_root->d_inode);
return dentry;
}
#define NULL_FILE_NAME "null"
......
security/selinux/ss/avtab.c
View file @ 9f9310bf
......@@ -96,12 +96,34 @@ avtab_insert_node(struct avtab *h, struct avtab_node **dst,
return newnode;
}
static int avtab_node_cmp(const struct avtab_key *key1,
const struct avtab_key *key2)
{
u16 specified = key1->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
if (key1->source_type == key2->source_type &&
key1->target_type == key2->target_type &&
key1->target_class == key2->target_class &&
(specified & key2->specified))
return 0;
if (key1->source_type < key2->source_type)
return -1;
if (key1->source_type == key2->source_type &&
key1->target_type < key2->target_type)
return -1;
if (key1->source_type == key2->source_type &&
key1->target_type == key2->target_type &&
key1->target_class < key2->target_class)
return -1;
return 1;
}
static int avtab_insert(struct avtab *h, const struct avtab_key *key,
const struct avtab_datum *datum)
{
u32 hvalue;
struct avtab_node *prev, *cur, *newnode;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
int cmp;
if (!h || !h->nslot || h->nel == U32_MAX)
return -EINVAL;
......@@ -110,23 +132,11 @@ static int avtab_insert(struct avtab *h, const struct avtab_key *key,
for (prev = NULL, cur = h->htable[hvalue];
cur;
prev = cur, cur = cur->next) {
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
(specified & cur->key.specified)) {
cmp = avtab_node_cmp(key, &cur->key);
/* extended perms may not be unique */
if (specified & AVTAB_XPERMS)
break;
if (cmp == 0 && !(key->specified & AVTAB_XPERMS))
return -EEXIST;
}
if (key->source_type < cur->key.source_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type < cur->key.target_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class < cur->key.target_class)
if (cmp <= 0)
break;
}
......@@ -148,7 +158,7 @@ struct avtab_node *avtab_insert_nonunique(struct avtab *h,
{
u32 hvalue;
struct avtab_node *prev, *cur;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
int cmp;
if (!h || !h->nslot || h->nel == U32_MAX)
return NULL;
......@@ -156,19 +166,8 @@ struct avtab_node *avtab_insert_nonunique(struct avtab *h,
for (prev = NULL, cur = h->htable[hvalue];
cur;
prev = cur, cur = cur->next) {
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
(specified & cur->key.specified))
break;
if (key->source_type < cur->key.source_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type < cur->key.target_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class < cur->key.target_class)
cmp = avtab_node_cmp(key, &cur->key);
if (cmp <= 0)
break;
}
return avtab_insert_node(h, prev ? &prev->next : &h->htable[hvalue],
......@@ -183,7 +182,7 @@ struct avtab_node *avtab_search_node(struct avtab *h,
{
u32 hvalue;
struct avtab_node *cur;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
int cmp;
if (!h || !h->nslot)
return NULL;
......@@ -191,20 +190,10 @@ struct avtab_node *avtab_search_node(struct avtab *h,
hvalue = avtab_hash(key, h->mask);
for (cur = h->htable[hvalue]; cur;
cur = cur->next) {
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
(specified & cur->key.specified))
cmp = avtab_node_cmp(key, &cur->key);
if (cmp == 0)
return cur;
if (key->source_type < cur->key.source_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type < cur->key.target_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class < cur->key.target_class)
if (cmp < 0)
break;
}
return NULL;
......@@ -213,27 +202,19 @@ struct avtab_node *avtab_search_node(struct avtab *h,
struct avtab_node*
avtab_search_node_next(struct avtab_node *node, u16 specified)
{
struct avtab_key tmp_key;
struct avtab_node *cur;
int cmp;
if (!node)
return NULL;
specified &= ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
tmp_key = node->key;
tmp_key.specified = specified;
for (cur = node->next; cur; cur = cur->next) {
if (node->key.source_type == cur->key.source_type &&
node->key.target_type == cur->key.target_type &&
node->key.target_class == cur->key.target_class &&
(specified & cur->key.specified))
cmp = avtab_node_cmp(&tmp_key, &cur->key);
if (cmp == 0)
return cur;
if (node->key.source_type < cur->key.source_type)
break;
if (node->key.source_type == cur->key.source_type &&
node->key.target_type < cur->key.target_type)
break;
if (node->key.source_type == cur->key.source_type &&
node->key.target_type == cur->key.target_type &&
node->key.target_class < cur->key.target_class)
if (cmp < 0)
break;
}
return NULL;
......
security/selinux/ss/policydb.c
View file @ 9f9310bf
......@@ -409,16 +409,9 @@ static int roles_init(struct policydb *p)
static u32 filenametr_hash(const void *k)
{
const struct filename_trans_key *ft = k;
unsigned long hash;
unsigned int byte_num;
unsigned char focus;
unsigned long salt = ft->ttype ^ ft->tclass;
hash = ft->ttype ^ ft->tclass;
byte_num = 0;
while ((focus = ft->name[byte_num++]))
hash = partial_name_hash(focus, hash);
return hash;
return full_name_hash((void *)salt, ft->name, strlen(ft->name));
}
static int filenametr_cmp(const void *k1, const void *k2)
......@@ -864,6 +857,8 @@ void policydb_destroy(struct policydb *p)
int policydb_load_isids(struct policydb *p, struct sidtab *s)
{
struct ocontext *head, *c;
bool isid_init_supported = ebitmap_get_bit(&p->policycaps,
POLICYDB_CAP_USERSPACE_INITIAL_CONTEXT);
int rc;
rc = sidtab_init(s);
......@@ -887,6 +882,13 @@ int policydb_load_isids(struct policydb *p, struct sidtab *s)
if (!name)
continue;
/*
* Also ignore SECINITSID_INIT if the policy doesn't declare
* support for it
*/
if (sid == SECINITSID_INIT && !isid_init_supported)
continue;
rc = sidtab_set_initial(s, sid, &c->context[0]);
if (rc) {
pr_err("SELinux: unable to load initial SID %s.\n",
......@@ -894,6 +896,24 @@ int policydb_load_isids(struct policydb *p, struct sidtab *s)
sidtab_destroy(s);
return rc;
}
/*
* If the policy doesn't support the "userspace_initial_context"
* capability, set SECINITSID_INIT to the same context as
* SECINITSID_KERNEL. This ensures the same behavior as before
* the reintroduction of SECINITSID_INIT, where all tasks
* started before policy load would initially get the context
* corresponding to SECINITSID_KERNEL.
*/
if (sid == SECINITSID_KERNEL && !isid_init_supported) {
rc = sidtab_set_initial(s, SECINITSID_INIT, &c->context[0]);
if (rc) {
pr_err("SELinux: unable to load initial SID %s.\n",
name);
sidtab_destroy(s);
return rc;
}
}
}
return 0;
}
......
security/selinux/ss/services.c
View file @ 9f9310bf
......@@ -1322,8 +1322,19 @@ static int security_sid_to_context_core(u32 sid, char **scontext,
if (!selinux_initialized()) {
if (sid <= SECINITSID_NUM) {
char *scontextp;
const char *s = initial_sid_to_string[sid];
const char *s;
/*
* Before the policy is loaded, translate
* SECINITSID_INIT to "kernel", because systemd and
* libselinux < 2.6 take a getcon_raw() result that is
* both non-null and not "kernel" to mean that a policy
* is already loaded.
*/
if (sid == SECINITSID_INIT)
sid = SECINITSID_KERNEL;
s = initial_sid_to_string[sid];
if (!s)
return -EINVAL;
*scontext_len = strlen(s) + 1;
......
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