diff options
author | Richard Guy Briggs <rgb@redhat.com> | 2013-12-11 13:52:26 -0500 |
---|---|---|
committer | Eric Paris <eparis@redhat.com> | 2014-03-20 10:11:55 -0400 |
commit | f1dc4867ff41b7bcca57fa19449d1fe7ad517ac1 (patch) | |
tree | 873f8e7625dc54ae20a0cc2513fb6a33027f36d7 /kernel | |
parent | c92cdeb45eea38515e82187f48c2e4f435fb4e25 (diff) | |
download | linux-f1dc4867ff41b7bcca57fa19449d1fe7ad517ac1.tar.bz2 |
audit: anchor all pid references in the initial pid namespace
Store and log all PIDs with reference to the initial PID namespace and
use the access functions task_pid_nr() and task_tgid_nr() for task->pid
and task->tgid.
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
(informed by ebiederman's c776b5d2)
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/audit.c | 5 | ||||
-rw-r--r-- | kernel/auditfilter.c | 17 | ||||
-rw-r--r-- | kernel/auditsc.c | 16 |
3 files changed, 28 insertions, 10 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index e1e1b2137048..5a096f8e28cb 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -649,6 +649,7 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type) { int rc = 0; uid_t uid = from_kuid(&init_user_ns, current_uid()); + pid_t pid = task_tgid_nr(current); if (!audit_enabled && msg_type != AUDIT_USER_AVC) { *ab = NULL; @@ -658,7 +659,7 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type) *ab = audit_log_start(NULL, GFP_KERNEL, msg_type); if (unlikely(!*ab)) return rc; - audit_log_format(*ab, "pid=%d uid=%u", task_tgid_vnr(current), uid); + audit_log_format(*ab, "pid=%d uid=%u", pid, uid); audit_log_session_info(*ab); audit_log_task_context(*ab); @@ -1823,7 +1824,7 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) " euid=%u suid=%u fsuid=%u" " egid=%u sgid=%u fsgid=%u tty=%s ses=%u", task_ppid_nr(tsk), - tsk->pid, + task_pid_nr(tsk), from_kuid(&init_user_ns, audit_get_loginuid(tsk)), from_kuid(&init_user_ns, cred->uid), from_kgid(&init_user_ns, cred->gid), diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c index 549bbb6e6597..96c8a704f130 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -433,6 +433,19 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data, f->val = 0; } + if ((f->type == AUDIT_PID) || (f->type == AUDIT_PPID)) { + struct pid *pid; + rcu_read_lock(); + pid = find_vpid(f->val); + if (!pid) { + rcu_read_unlock(); + err = -ESRCH; + goto exit_free; + } + f->val = pid_nr(pid); + rcu_read_unlock(); + } + err = audit_field_valid(entry, f); if (err) goto exit_free; @@ -1242,12 +1255,14 @@ static int audit_filter_user_rules(struct audit_krule *rule, int type, for (i = 0; i < rule->field_count; i++) { struct audit_field *f = &rule->fields[i]; + pid_t pid; int result = 0; u32 sid; switch (f->type) { case AUDIT_PID: - result = audit_comparator(task_pid_vnr(current), f->op, f->val); + pid = task_pid_nr(current); + result = audit_comparator(pid, f->op, f->val); break; case AUDIT_UID: result = audit_uid_comparator(current_uid(), f->op, f->uid); diff --git a/kernel/auditsc.c b/kernel/auditsc.c index a6cf7ab56e61..6381f25ac3d4 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -457,10 +457,12 @@ static int audit_filter_rules(struct task_struct *tsk, struct audit_field *f = &rule->fields[i]; struct audit_names *n; int result = 0; + pid_t pid; switch (f->type) { case AUDIT_PID: - result = audit_comparator(tsk->pid, f->op, f->val); + pid = task_pid_nr(tsk); + result = audit_comparator(pid, f->op, f->val); break; case AUDIT_PPID: if (ctx) { @@ -2051,7 +2053,7 @@ static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid, audit_log_format(ab, "pid=%d uid=%u" " old-auid=%u new-auid=%u old-ses=%u new-ses=%u" " res=%d", - current->pid, uid, + task_pid_nr(current), uid, oldloginuid, loginuid, oldsessionid, sessionid, !rc); audit_log_end(ab); @@ -2275,7 +2277,7 @@ void __audit_ptrace(struct task_struct *t) { struct audit_context *context = current->audit_context; - context->target_pid = t->pid; + context->target_pid = task_pid_nr(t); context->target_auid = audit_get_loginuid(t); context->target_uid = task_uid(t); context->target_sessionid = audit_get_sessionid(t); @@ -2300,7 +2302,7 @@ int __audit_signal_info(int sig, struct task_struct *t) if (audit_pid && t->tgid == audit_pid) { if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1 || sig == SIGUSR2) { - audit_sig_pid = tsk->pid; + audit_sig_pid = task_pid_nr(tsk); if (uid_valid(tsk->loginuid)) audit_sig_uid = tsk->loginuid; else @@ -2314,7 +2316,7 @@ int __audit_signal_info(int sig, struct task_struct *t) /* optimize the common case by putting first signal recipient directly * in audit_context */ if (!ctx->target_pid) { - ctx->target_pid = t->tgid; + ctx->target_pid = task_tgid_nr(t); ctx->target_auid = audit_get_loginuid(t); ctx->target_uid = t_uid; ctx->target_sessionid = audit_get_sessionid(t); @@ -2335,7 +2337,7 @@ int __audit_signal_info(int sig, struct task_struct *t) } BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS); - axp->target_pid[axp->pid_count] = t->tgid; + axp->target_pid[axp->pid_count] = task_tgid_nr(t); axp->target_auid[axp->pid_count] = audit_get_loginuid(t); axp->target_uid[axp->pid_count] = t_uid; axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t); @@ -2435,7 +2437,7 @@ static void audit_log_task(struct audit_buffer *ab) from_kgid(&init_user_ns, gid), sessionid); audit_log_task_context(ab); - audit_log_format(ab, " pid=%d comm=", current->pid); + audit_log_format(ab, " pid=%d comm=", task_pid_nr(current)); audit_log_untrustedstring(ab, current->comm); if (mm) { down_read(&mm->mmap_sem); |