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audit: convert sessionid unset to a macro

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Use a macro, "AUDIT_SID_UNSET", to replace each instance of
initialization and comparison to an audit session ID.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Richard Guy Briggs 2018-05-12 21:58:19 -04:00 committed by Paul Moore
parent 326bee0286
commit f0b752168d
5 changed files with 7 additions and 5 deletions
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2
include/linux/audit.h
View file

@ -510,7 +510,7 @@ static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
} }
static inline unsigned int audit_get_sessionid(struct task_struct *tsk) static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
{ {
return -1; return AUDIT_SID_UNSET;
} }
static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp) static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
{ } { }

2
include/net/xfrm.h
View file

@ -751,7 +751,7 @@ static inline void xfrm_audit_helper_usrinfo(bool task_valid,
audit_get_loginuid(current) : audit_get_loginuid(current) :
INVALID_UID); INVALID_UID);
const unsigned int ses = task_valid ? audit_get_sessionid(current) : const unsigned int ses = task_valid ? audit_get_sessionid(current) :
(unsigned int) -1; AUDIT_SID_UNSET;
audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
audit_log_task_context(audit_buf); audit_log_task_context(audit_buf);

1
include/uapi/linux/audit.h
View file

@ -465,6 +465,7 @@ struct audit_tty_status {
}; };
#define AUDIT_UID_UNSET (unsigned int)-1 #define AUDIT_UID_UNSET (unsigned int)-1
#define AUDIT_SID_UNSET ((unsigned int)-1)
/* audit_rule_data supports filter rules with both integer and string /* audit_rule_data supports filter rules with both integer and string
* fields. It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and * fields. It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and

3
init/init_task.c
View file

@ -9,6 +9,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/fs.h> #include <linux/fs.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/audit.h>
#include <asm/pgtable.h> #include <asm/pgtable.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
@ -119,7 +120,7 @@ struct task_struct init_task
.thread_node = LIST_HEAD_INIT(init_signals.thread_head), .thread_node = LIST_HEAD_INIT(init_signals.thread_head),
#ifdef CONFIG_AUDITSYSCALL #ifdef CONFIG_AUDITSYSCALL
.loginuid = INVALID_UID, .loginuid = INVALID_UID,
.sessionid = (unsigned int)-1, .sessionid = AUDIT_SID_UNSET,
#endif #endif
#ifdef CONFIG_PERF_EVENTS #ifdef CONFIG_PERF_EVENTS
.perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex),

4
kernel/auditsc.c
View file

@ -2050,7 +2050,7 @@ static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid,
int audit_set_loginuid(kuid_t loginuid) int audit_set_loginuid(kuid_t loginuid)
{ {
struct task_struct *task = current; struct task_struct *task = current;
unsigned int oldsessionid, sessionid = (unsigned int)-1; unsigned int oldsessionid, sessionid = AUDIT_SID_UNSET;
kuid_t oldloginuid; kuid_t oldloginuid;
int rc; int rc;
@ -2064,7 +2064,7 @@ int audit_set_loginuid(kuid_t loginuid)
/* are we setting or clearing? */ /* are we setting or clearing? */
if (uid_valid(loginuid)) { if (uid_valid(loginuid)) {
sessionid = (unsigned int)atomic_inc_return(&session_id); sessionid = (unsigned int)atomic_inc_return(&session_id);
if (unlikely(sessionid == (unsigned int)-1)) if (unlikely(sessionid == AUDIT_SID_UNSET))
sessionid = (unsigned int)atomic_inc_return(&session_id); sessionid = (unsigned int)atomic_inc_return(&session_id);
} }