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userns: Convert the audit loginuid to be a kuid

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Always store audit loginuids in type kuid_t.

Print loginuids by converting them into uids in the appropriate user
namespace, and then printing the resulting uid.

Modify audit_get_loginuid to return a kuid_t.

Modify audit_set_loginuid to take a kuid_t.

Modify /proc/<pid>/loginuid on read to convert the loginuid into the
user namespace of the opener of the file.

Modify /proc/<pid>/loginud on write to convert the loginuid
rom the user namespace of the opener of the file.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Paul Moore <paul@paul-moore.com> ?
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2012-09-10 22:39:43 -07:00
parent ca57ec0f00
commit e1760bd5ff
18 changed files with 80 additions and 66 deletions
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20
kernel/audit.c
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@@ -265,7 +265,7 @@ void audit_log_lost(const char *message)
}
static int audit_log_config_change(char *function_name, int new, int old,
uid_t loginuid, u32 sessionid, u32 sid,
kuid_t loginuid, u32 sessionid, u32 sid,
int allow_changes)
{
struct audit_buffer *ab;
@@ -273,7 +273,7 @@ static int audit_log_config_change(char *function_name, int new, int old,
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
audit_log_format(ab, "%s=%d old=%d auid=%u ses=%u", function_name, new,
old, loginuid, sessionid);
old, from_kuid(&init_user_ns, loginuid), sessionid);
if (sid) {
char *ctx = NULL;
u32 len;
@@ -293,7 +293,7 @@ static int audit_log_config_change(char *function_name, int new, int old,
}
static int audit_do_config_change(char *function_name, int *to_change,
int new, uid_t loginuid, u32 sessionid,
int new, kuid_t loginuid, u32 sessionid,
u32 sid)
{
int allow_changes, rc = 0, old = *to_change;
@@ -320,21 +320,21 @@ static int audit_do_config_change(char *function_name, int *to_change,
return rc;
}
static int audit_set_rate_limit(int limit, uid_t loginuid, u32 sessionid,
static int audit_set_rate_limit(int limit, kuid_t loginuid, u32 sessionid,
u32 sid)
{
return audit_do_config_change("audit_rate_limit", &audit_rate_limit,
limit, loginuid, sessionid, sid);
}
static int audit_set_backlog_limit(int limit, uid_t loginuid, u32 sessionid,
static int audit_set_backlog_limit(int limit, kuid_t loginuid, u32 sessionid,
u32 sid)
{
return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit,
limit, loginuid, sessionid, sid);
}
static int audit_set_enabled(int state, uid_t loginuid, u32 sessionid, u32 sid)
static int audit_set_enabled(int state, kuid_t loginuid, u32 sessionid, u32 sid)
{
int rc;
if (state < AUDIT_OFF || state > AUDIT_LOCKED)
@@ -349,7 +349,7 @@ static int audit_set_enabled(int state, uid_t loginuid, u32 sessionid, u32 sid)
return rc;
}
static int audit_set_failure(int state, uid_t loginuid, u32 sessionid, u32 sid)
static int audit_set_failure(int state, kuid_t loginuid, u32 sessionid, u32 sid)
{
if (state != AUDIT_FAIL_SILENT
&& state != AUDIT_FAIL_PRINTK
@@ -607,7 +607,7 @@ static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type)
}
static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type,
uid_t auid, u32 ses, u32 sid)
kuid_t auid, u32 ses, u32 sid)
{
int rc = 0;
char *ctx = NULL;
@@ -622,7 +622,7 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type,
audit_log_format(*ab, "pid=%d uid=%u auid=%u ses=%u",
task_tgid_vnr(current),
from_kuid(&init_user_ns, current_uid()),
auid, ses);
from_kuid(&init_user_ns, auid), ses);
if (sid) {
rc = security_secid_to_secctx(sid, &ctx, &len);
if (rc)
@@ -644,7 +644,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
int err;
struct audit_buffer *ab;
u16 msg_type = nlh->nlmsg_type;
uid_t loginuid; /* loginuid of sender */
kuid_t loginuid; /* loginuid of sender */
u32 sessionid;
struct audit_sig_info *sig_data;
char *ctx = NULL;