* [PATCH ghau40 v2 3/5] auditctl: add support for containerid filter
2018-03-16 9:12 [PATCH ghau40 v2 0/5] add support for audit container ID Richard Guy Briggs
2018-03-16 9:12 ` [PATCH ghau40 v2 1/5] AUDIT_CONTAINER message type basic support Richard Guy Briggs
2018-03-16 9:12 ` [PATCH ghau40 v2 2/5] AUDIT_CONTAINER_INFO " Richard Guy Briggs
@ 2018-03-16 9:12 ` Richard Guy Briggs
2018-03-16 9:12 ` [PATCH ghau40 v2 4/5] add ausearch containerid support Richard Guy Briggs
2018-03-16 9:12 ` [PATCH ghau40 v2 5/5] start normalization " Richard Guy Briggs
4 siblings, 0 replies; 6+ messages in thread
From: Richard Guy Briggs @ 2018-03-16 9:12 UTC (permalink / raw)
To: cgroups, containers, linux-api, Linux-Audit Mailing List,
linux-fsdevel, LKML, netdev
Cc: luto, jlayton, carlos, viro, dhowells, simo, eparis, serge,
ebiederm, madzcar, Richard Guy Briggs
A u64 container identifier has been added to the kernel view of tasks.
This allows container orchestrators to label tasks with a unique
tamperproof identifier that gets inherited by its children to be able to
track the provenance of actions by a container.
Add support to libaudit and auditctl for the containerid field to filter
based on container identifier. Since it is a u64 and larger than any
other numeric field, send it as a string but do the appropriate
conversions on each end in each direction.
See: https://github.com/linux-audit/audit-userspace/issues/40
See: https://github.com/linux-audit/audit-kernel/issues/32
See: https://github.com/linux-audit/audit-testsuite/issues/64
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
---
docs/auditctl.8 | 3 +++
lib/fieldtab.h | 1 +
lib/libaudit.c | 36 ++++++++++++++++++++++++++++++++++++
lib/libaudit.h | 7 +++++++
src/auditctl-listing.c | 21 +++++++++++++++++++++
5 files changed, 68 insertions(+)
diff --git a/docs/auditctl.8 b/docs/auditctl.8
index 88466de..8bda43d 100644
--- a/docs/auditctl.8
+++ b/docs/auditctl.8
@@ -210,6 +210,9 @@ Parent's Process ID
.B sessionid
User's login session ID
.TP
+.B containerid
+Process' container ID
+.TP
.B subj_user
Program's SE Linux User
.TP
diff --git a/lib/fieldtab.h b/lib/fieldtab.h
index c425d5b..755800a 100644
--- a/lib/fieldtab.h
+++ b/lib/fieldtab.h
@@ -47,6 +47,7 @@ _S(AUDIT_OBJ_TYPE, "obj_type" )
_S(AUDIT_OBJ_LEV_LOW, "obj_lev_low" )
_S(AUDIT_OBJ_LEV_HIGH, "obj_lev_high" )
_S(AUDIT_SESSIONID, "sessionid" )
+_S(AUDIT_CONTAINERID, "containerid" )
_S(AUDIT_DEVMAJOR, "devmajor" )
_S(AUDIT_DEVMINOR, "devminor" )
diff --git a/lib/libaudit.c b/lib/libaudit.c
index 331cdde..c45f366 100644
--- a/lib/libaudit.c
+++ b/lib/libaudit.c
@@ -1737,6 +1737,42 @@ int audit_rule_fieldpair_data(struct audit_rule_data **rulep, const char *pair,
else if (strcmp(v, "unset") == 0)
rule->values[rule->field_count] = UINT_MAX;
break;
+ case AUDIT_CONTAINERID: {
+ unsigned long long val;
+
+ if ((audit_get_features() &
+ AUDIT_FEATURE_BITMAP_CONTAINERID_FILTER) == 0)
+ return -EAU_FIELDNOSUPPORT;
+ if (flags != AUDIT_FILTER_EXCLUDE &&
+ flags != AUDIT_FILTER_USER &&
+ flags != AUDIT_FILTER_EXIT)
+ return -EAU_FIELDNOFILTER;
+ if (isdigit((char)*(v)))
+ val = strtoull(v, NULL, 0);
+ else if (strlen(v) >= 2 && *(v)=='-' &&
+ (isdigit((char)*(v+1))))
+ val = strtoll(v, NULL, 0);
+ else if (strcmp(v, "unset") == 0)
+ val = ULLONG_MAX;
+ else
+ return -EAU_FIELDVALNUM;
+ if (errno)
+ return -EAU_FIELDVALNUM;
+ vlen = sizeof(unsigned long long);
+ rule->values[rule->field_count] = vlen;
+ offset = rule->buflen;
+ rule->buflen += vlen;
+ *rulep = realloc(rule, sizeof(*rule) + rule->buflen);
+ if (*rulep == NULL) {
+ free(rule);
+ audit_msg(LOG_ERR, "Cannot realloc memory!\n");
+ return -3;
+ } else {
+ rule = *rulep;
+ }
+ *(unsigned long long*)(&rule->buf[offset]) = val;
+ break;
+ }
case AUDIT_DEVMAJOR...AUDIT_INODE:
case AUDIT_SUCCESS:
if (flags != AUDIT_FILTER_EXIT)
diff --git a/lib/libaudit.h b/lib/libaudit.h
index 756a3b8..cefe71d 100644
--- a/lib/libaudit.h
+++ b/lib/libaudit.h
@@ -328,6 +328,9 @@ extern "C" {
#ifndef AUDIT_FEATURE_BITMAP_FILTER_FS
#define AUDIT_FEATURE_BITMAP_FILTER_FS 0x00000040
#endif
+#ifndef AUDIT_FEATURE_BITMAP_CONTAINERID_FILTER
+#define AUDIT_FEATURE_BITMAP_CONTAINERID_FILTER 0x00000080
+#endif
/* Defines for interfield comparison update */
#ifndef AUDIT_OBJ_UID
@@ -351,6 +354,10 @@ extern "C" {
#define AUDIT_FSTYPE 26
#endif
+#ifndef AUDIT_CONTAINERID
+#define AUDIT_CONTAINERID 27
+#endif
+
#ifndef AUDIT_COMPARE_UID_TO_OBJ_UID
#define AUDIT_COMPARE_UID_TO_OBJ_UID 1
#endif
diff --git a/src/auditctl-listing.c b/src/auditctl-listing.c
index f670ff9..974dcb4 100644
--- a/src/auditctl-listing.c
+++ b/src/auditctl-listing.c
@@ -25,6 +25,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <limits.h>
#include "auditctl-listing.h"
#include "private.h"
#include "auditctl-llist.h"
@@ -460,6 +461,26 @@ static void print_rule(const struct audit_rule_data *r)
audit_operator_to_symbol(op),
audit_fstype_to_name(
r->values[i]));
+ } else if (field == AUDIT_CONTAINERID) {
+ unsigned long long val;
+
+ if (r->values[i] == sizeof(unsigned long long)) {
+ val = *(unsigned long long*)(&r->buf[boffset]);
+
+ if (val != ULLONG_MAX)
+ printf(" -F %s%s%llu", name,
+ audit_operator_to_symbol(op),
+ val);
+ else
+ printf(" -F %s%s%s", name,
+ audit_operator_to_symbol(op),
+ "unset");
+ } else {
+ printf(" -F %s%s%s", name,
+ audit_operator_to_symbol(op),
+ "inval");
+ }
+ boffset += r->values[i];
} else {
// The default is signed decimal
printf(" -F %s%s%d", name,
--
1.8.3.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH ghau40 v2 4/5] add ausearch containerid support
2018-03-16 9:12 [PATCH ghau40 v2 0/5] add support for audit container ID Richard Guy Briggs
` (2 preceding siblings ...)
2018-03-16 9:12 ` [PATCH ghau40 v2 3/5] auditctl: add support for containerid filter Richard Guy Briggs
@ 2018-03-16 9:12 ` Richard Guy Briggs
2018-03-16 9:12 ` [PATCH ghau40 v2 5/5] start normalization " Richard Guy Briggs
4 siblings, 0 replies; 6+ messages in thread
From: Richard Guy Briggs @ 2018-03-16 9:12 UTC (permalink / raw)
To: cgroups, containers, linux-api, Linux-Audit Mailing List,
linux-fsdevel, LKML, netdev
Cc: luto, jlayton, carlos, viro, dhowells, simo, eparis, serge,
ebiederm, madzcar, Richard Guy Briggs
Add support to ausearch for searching on the containerid field in
records.
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
---
src/aureport-options.c | 1 +
src/ausearch-llist.c | 2 +
src/ausearch-llist.h | 1 +
src/ausearch-match.c | 3 +
src/ausearch-options.c | 46 ++++++++++++-
src/ausearch-options.h | 1 +
src/ausearch-parse.c | 171 +++++++++++++++++++++++++++++++++++++++++++++++++
7 files changed, 224 insertions(+), 1 deletion(-)
diff --git a/src/aureport-options.c b/src/aureport-options.c
index 9b914ed..ffff436 100644
--- a/src/aureport-options.c
+++ b/src/aureport-options.c
@@ -62,6 +62,7 @@ const char *event_vmname = NULL;
long long event_exit = 0;
int event_exit_is_set = 0;
int event_ppid = -1, event_session_id = -2;
+unsigned long long int event_container_id = -2;
int event_debug = 0, event_machine = -1;
/* These are used by aureport */
diff --git a/src/ausearch-llist.c b/src/ausearch-llist.c
index ef5503c..c910724 100644
--- a/src/ausearch-llist.c
+++ b/src/ausearch-llist.c
@@ -60,6 +60,7 @@ void list_create(llist *l)
l->s.arch = 0;
l->s.syscall = 0;
l->s.session_id = -2;
+ l->s.container_id = -2;
l->s.uuid = NULL;
l->s.vmname = NULL;
l->s.tuid = NULL;
@@ -211,6 +212,7 @@ void list_clear(llist* l)
l->s.arch = 0;
l->s.syscall = 0;
l->s.session_id = -2;
+ l->s.container_id = -2;
free(l->s.uuid);
l->s.uuid = NULL;
free(l->s.vmname);
diff --git a/src/ausearch-llist.h b/src/ausearch-llist.h
index 64e4ee1..1c651c5 100644
--- a/src/ausearch-llist.h
+++ b/src/ausearch-llist.h
@@ -56,6 +56,7 @@ typedef struct
int arch; // arch
int syscall; // syscall
uint32_t session_id; // Login session id
+ __u64 container_id;// Container id
long long exit; // Syscall exit code
int exit_is_set; // Syscall exit code is valid
char *hostname; // remote hostname
diff --git a/src/ausearch-match.c b/src/ausearch-match.c
index 61a11d3..51dccb0 100644
--- a/src/ausearch-match.c
+++ b/src/ausearch-match.c
@@ -113,6 +113,9 @@ int match(llist *l)
if ((event_session_id != -2) &&
(event_session_id != l->s.session_id))
return 0;
+ if ((event_container_id != -2) &&
+ (event_container_id != l->s.container_id))
+ return 0;
if (event_exit_is_set) {
if (l->s.exit_is_set == 0)
return 0;
diff --git a/src/ausearch-options.c b/src/ausearch-options.c
index a3f08e7..1d095a7 100644
--- a/src/ausearch-options.c
+++ b/src/ausearch-options.c
@@ -60,6 +60,7 @@ int event_syscall = -1, event_machine = -1;
int event_ua = 0, event_ga = 0, event_se = 0;
int just_one = 0;
uint32_t event_session_id = -2;
+unsigned long long int event_container_id = -2;
long long event_exit = 0;
int event_exit_is_set = 0;
int line_buffered = 0;
@@ -88,7 +89,7 @@ struct nv_pair {
enum { S_EVENT, S_COMM, S_FILENAME, S_ALL_GID, S_EFF_GID, S_GID, S_HELP,
S_HOSTNAME, S_INTERP, S_INFILE, S_MESSAGE_TYPE, S_PID, S_SYSCALL, S_OSUCCESS,
-S_TIME_END, S_TIME_START, S_TERMINAL, S_ALL_UID, S_EFF_UID, S_UID, S_LOGINID,
+S_TIME_END, S_TIME_START, S_TERMINAL, S_ALL_UID, S_EFF_UID, S_UID, S_LOGINID, S_CONTAINERID,
S_VERSION, S_EXACT_MATCH, S_EXECUTABLE, S_CONTEXT, S_SUBJECT, S_OBJECT,
S_PPID, S_KEY, S_RAW, S_NODE, S_IN_LOGS, S_JUST_ONE, S_SESSION, S_EXIT,
S_LINEBUFFERED, S_UUID, S_VMNAME, S_DEBUG, S_CHECKPOINT, S_ARCH, S_FORMAT,
@@ -169,6 +170,7 @@ static struct nv_pair optiontab[] = {
{ S_UUID, "--uuid" },
{ S_LOGINID, "-ul" },
{ S_LOGINID, "--loginuid" },
+ { S_CONTAINERID, "--containerid" },
{ S_VERSION, "-v" },
{ S_VERSION, "--version" },
{ S_VMNAME, "-vm" },
@@ -1182,6 +1184,48 @@ int check_params(int count, char *vars[])
}
c++;
break;
+ case S_CONTAINERID:
+ if (!optarg) {
+ if ((c+1 < count) && vars[c+1])
+ optarg = vars[c+1];
+ else {
+ fprintf(stderr,
+ "Argument is required for %s\n",
+ vars[c]);
+ retval = -1;
+ break;
+ }
+ }
+ {
+ size_t len = strlen(optarg);
+ if (isdigit(optarg[0])) {
+ errno = 0;
+ event_container_id = strtoull(optarg,NULL,0);
+ if (errno) {
+ fprintf(stderr,
+ "Numeric container ID conversion error (%s) for %s\n",
+ strerror(errno), optarg);
+ retval = -1;
+ }
+ } else if (len >= 2 && *(optarg)=='-' &&
+ (isdigit(optarg[1]))) {
+ errno = 0;
+ event_container_id = strtoll(optarg, NULL, 0);
+ if (errno) {
+ retval = -1;
+ fprintf(stderr, "Error converting %s\n",
+ optarg);
+ }
+ } else {
+ fprintf(stderr,
+ "Container ID is non-numeric and unknown (%s)\n",
+ optarg);
+ retval = -1;
+ break;
+ }
+ }
+ c++;
+ break;
case S_UUID:
if (!optarg) {
fprintf(stderr,
diff --git a/src/ausearch-options.h b/src/ausearch-options.h
index 1372762..b7830a1 100644
--- a/src/ausearch-options.h
+++ b/src/ausearch-options.h
@@ -40,6 +40,7 @@ extern int line_buffered;
extern int event_debug;
extern pid_t event_ppid;
extern uint32_t event_session_id;
+extern unsigned long long int event_container_id;
extern ilist *event_type;
/* Data type to govern output format */
diff --git a/src/ausearch-parse.c b/src/ausearch-parse.c
index 07bad89..b9b49c4 100644
--- a/src/ausearch-parse.c
+++ b/src/ausearch-parse.c
@@ -52,6 +52,8 @@ static int parse_path(const lnode *n, search_items *s);
static int parse_user(const lnode *n, search_items *s);
static int parse_obj(const lnode *n, search_items *s);
static int parse_login(const lnode *n, search_items *s);
+static int parse_container(const lnode *n, search_items *s);
+static int parse_container_info(const lnode *n, search_items *s);
static int parse_daemon1(const lnode *n, search_items *s);
static int parse_daemon2(const lnode *n, search_items *s);
static int parse_sockaddr(const lnode *n, search_items *s);
@@ -112,6 +114,9 @@ int extract_search_items(llist *l)
case AUDIT_LOGIN:
ret = parse_login(n, s);
break;
+ case AUDIT_CONTAINER:
+ ret = parse_container(n, s);
+ break;
case AUDIT_IPC:
case AUDIT_OBJ_PID:
ret = parse_obj(n, s);
@@ -177,6 +182,9 @@ int extract_search_items(llist *l)
case AUDIT_TTY:
ret = parse_tty(n, s);
break;
+ case AUDIT_CONTAINER_INFO:
+ ret = parse_container_info(n, s);
+ break;
default:
if (event_debug)
fprintf(stderr,
@@ -1379,6 +1387,169 @@ static int parse_login(const lnode *n, search_items *s)
return 0;
}
+static int parse_container(const lnode *n, search_items *s)
+{
+ char *ptr, *str, *term = n->message;
+
+ // skip op
+ // get pid
+ if (event_pid != -1) {
+ str = strstr(term, "pid=");
+ if (str == NULL)
+ return 1;
+ ptr = str + 4;
+ term = strchr(ptr, ' ');
+ if (term == NULL)
+ return 2;
+ *term = 0;
+ errno = 0;
+ s->pid = strtoul(ptr, NULL, 10);
+ if (errno)
+ return 3;
+ *term = ' ';
+ }
+ // get uid
+ if (event_uid != -1 || event_tuid) {
+ str = strstr(term, "uid=");
+ if (str == NULL)
+ return 4;
+ ptr = str + 4;
+ term = strchr(ptr, ' ');
+ if (term == NULL)
+ return 5;
+ *term = 0;
+ errno = 0;
+ s->uid = strtoul(ptr, NULL, 10);
+ if (errno)
+ return 6;
+ *term = ' ';
+ s->tuid = lookup_uid("uid", s->uid);
+ }
+ // get subj
+ if (event_subject) {
+ str = strstr(term, "subj=");
+ if (str) {
+ ptr = str + 5;
+ term = strchr(ptr, ' ');
+ if (term == NULL)
+ return 12;
+ *term = 0;
+ if (audit_avc_init(s) == 0) {
+ anode an;
+
+ anode_init(&an);
+ an.scontext = strdup(str);
+ alist_append(s->avc, &an);
+ *term = ' ';
+ } else
+ return 13;
+ *term = ' ';
+ }
+ }
+ // get loginuid
+ if (event_loginuid != -2 || event_tauid) {
+ str = strstr(term, "auid=");
+ if (str == NULL) {
+ return 7;
+ } else
+ ptr = str + 5;
+ term = strchr(ptr, ' ');
+ if (term)
+ *term = 0;
+ errno = 0;
+ s->loginuid = strtoul(ptr, NULL, 10);
+ if (errno)
+ return 8;
+ if (term)
+ *term = ' ';
+ s->tauid = lookup_uid("auid", s->loginuid);
+ }
+ // skip tty
+ // ses
+ if (event_session_id != -2 ) {
+ if (term == NULL)
+ term = n->message;
+ str = strstr(term, "ses=");
+ if (str == NULL)
+ return 14;
+ else
+ ptr = str + 4;
+ term = strchr(ptr, ' ');
+ if (term)
+ *term = 0;
+ errno = 0;
+ s->session_id = strtoul(ptr, NULL, 10);
+ if (errno)
+ return 11;
+ if (term)
+ *term = ' ';
+ }
+ // skip opid
+ // skip old-contid
+ // get containerid
+ if (event_container_id != -2) {
+ str = strstr(term, "contid=");
+ if (str == NULL) {
+ return 7;
+ } else
+ ptr = str + 7;
+ term = strchr(ptr, ' ');
+ if (term)
+ *term = 0;
+ errno = 0;
+ s->container_id = strtoull(ptr, NULL, 10);
+ if (errno)
+ return 8;
+ if (term)
+ *term = ' ';
+ }
+ // success
+ if (event_success != S_UNSET) {
+ if (term == NULL)
+ term = n->message;
+ str = strstr(term, "res=");
+ if (str != NULL) {
+ ptr = str + 4;
+ term = strchr(ptr, ' ');
+ if (term)
+ *term = 0;
+ errno = 0;
+ s->success = strtoul(ptr, NULL, 10);
+ if (errno)
+ return 9;
+ if (term)
+ *term = ' ';
+ } else
+ return 7;
+ }
+ return 0;
+}
+
+static int parse_container_info(const lnode *n, search_items *s)
+{
+ char *ptr, *str, *term = n->message;
+
+ // skip op
+ // get containerid
+ if (event_container_id != -2) {
+ str = strstr(term, "contid=");
+ if (str == NULL) {
+ return 7;
+ } else
+ ptr = str + 7;
+ term = strchr(ptr, ' ');
+ if (term)
+ *term = 0;
+ errno = 0;
+ s->container_id = strtoull(ptr, NULL, 10);
+ if (errno)
+ return 8;
+ if (term)
+ *term = ' ';
+ }
+ return 0;
+}
+
static int parse_daemon1(const lnode *n, search_items *s)
{
char *ptr, *str, *term, saved, *mptr;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 6+ messages in thread