@@ -297,6 +297,16 @@ static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
return tsp->smk_task;
}
+static inline struct smack_known *smk_of_task_struct(const struct task_struct *t)
+{
+ struct smack_known *skp;
+
+ rcu_read_lock();
+ skp = smk_of_task(__task_cred(t)->security);
+ rcu_read_unlock();
+ return skp;
+}
+
/*
* Present a pointer to the forked smack label entry in an task blob.
*/
@@ -43,8 +43,6 @@
#include <linux/binfmts.h>
#include "smack.h"
-#define task_security(task) (task_cred_xxx((task), security))
-
#define TRANS_TRUE "TRUE"
#define TRANS_TRUE_SIZE 4
@@ -199,7 +197,8 @@ static int smk_ptrace_rule_check(struct task_struct *tracer, char *tracee_label,
saip = &ad;
}
- tsp = task_security(tracer);
+ rcu_read_lock();
+ tsp = __task_cred(tracer)->security;
skp = smk_of_task(tsp);
if ((mode & PTRACE_MODE_ATTACH) &&
@@ -217,11 +216,14 @@ static int smk_ptrace_rule_check(struct task_struct *tracer, char *tracee_label,
if (saip)
smack_log(skp->smk_known, tracee_label, 0, rc, saip);
+ rcu_read_unlock();
return rc;
}
/* In case of rule==SMACK_PTRACE_DEFAULT or mode==PTRACE_MODE_READ */
rc = smk_tskacc(tsp, tracee_label, smk_ptrace_mode(mode), saip);
+
+ rcu_read_unlock();
return rc;
}
@@ -248,7 +250,7 @@ static int smack_ptrace_access_check(struct task_struct *ctp, unsigned int mode)
if (rc != 0)
return rc;
- skp = smk_of_task(task_security(ctp));
+ skp = smk_of_task_struct(ctp);
rc = smk_ptrace_rule_check(current, skp->smk_known, mode, __func__);
return rc;
@@ -1639,7 +1641,7 @@ static int smk_curacc_on_task(struct task_struct *p, int access,
const char *caller)
{
struct smk_audit_info ad;
- struct smack_known *skp = smk_of_task(task_security(p));
+ struct smack_known *skp = smk_of_task_struct(p);
smk_ad_init(&ad, caller, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, p);
@@ -1689,7 +1691,7 @@ static int smack_task_getsid(struct task_struct *p)
*/
static void smack_task_getsecid(struct task_struct *p, u32 *secid)
{
- struct smack_known *skp = smk_of_task(task_security(p));
+ struct smack_known *skp = smk_of_task_struct(p);
*secid = skp->smk_secid;
}
@@ -1796,7 +1798,7 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
{
struct smk_audit_info ad;
struct smack_known *skp;
- struct smack_known *tkp = smk_of_task(task_security(p));
+ struct smack_known *tkp = smk_of_task_struct(p);
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, p);
@@ -1844,7 +1846,7 @@ static int smack_task_wait(struct task_struct *p)
static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
{
struct inode_smack *isp = inode->i_security;
- struct smack_known *skp = smk_of_task(task_security(p));
+ struct smack_known *skp = smk_of_task_struct(p);
isp->smk_inode = skp->smk_known;
}
@@ -2988,7 +2990,7 @@ unlockandout:
*/
static int smack_getprocattr(struct task_struct *p, char *name, char **value)
{
- struct smack_known *skp = smk_of_task(task_security(p));
+ struct smack_known *skp = smk_of_task_struct(p);
char *cp;
int slen;