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Make Smack operate on smack_known struct where it still used char*

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Smack used to use a mix of smack_known struct and char* throughout its
APIs and implementation. This patch unifies the behaviour and makes it
store and operate exclusively on smack_known struct pointers when managing
labels.

Signed-off-by: Lukasz Pawelczyk <l.pawelczyk@samsung.com>

Conflicts:
	security/smack/smack_access.c
	security/smack/smack_lsm.c
This commit is contained in:
Lukasz Pawelczyk 2014-08-29 17:02:55 +02:00 committed by Casey Schaufler
parent d01757904d
commit 21c7eae21a
4 changed files with 233 additions and 255 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
security/smack/smack.h
View File

@ -71,11 +71,11 @@ struct smack_known {
#define SMK_CIPSOLEN 24
struct superblock_smack {
char *smk_root;
char *smk_floor;
char *smk_hat;
char *smk_default;
int smk_initialized;
struct smack_known *smk_root;
struct smack_known *smk_floor;
struct smack_known *smk_hat;
struct smack_known *smk_default;
int smk_initialized;
};
struct socket_smack {
@ -88,7 +88,7 @@ struct socket_smack {
* Inode smack data
*/
struct inode_smack {
char *smk_inode; /* label of the fso */
struct smack_known *smk_inode; /* label of the fso */
struct smack_known *smk_task; /* label of the task */
struct smack_known *smk_mmap; /* label of the mmap domain */
struct mutex smk_lock; /* initialization lock */
@ -112,7 +112,7 @@ struct task_smack {
struct smack_rule {
struct list_head list;
struct smack_known *smk_subject;
char *smk_object;
struct smack_known *smk_object;
int smk_access;
};
@ -123,7 +123,7 @@ struct smk_netlbladdr {
struct list_head list;
struct sockaddr_in smk_host; /* network address */
struct in_addr smk_mask; /* network mask */
char *smk_label; /* label */
struct smack_known *smk_label; /* label */
};
/*
@ -227,23 +227,23 @@ struct smk_audit_info {
/*
* These functions are in smack_lsm.c
*/
struct inode_smack *new_inode_smack(char *);
struct inode_smack *new_inode_smack(struct smack_known *);
/*
* These functions are in smack_access.c
*/
int smk_access_entry(char *, char *, struct list_head *);
int smk_access(struct smack_known *, char *, int, struct smk_audit_info *);
int smk_tskacc(struct task_smack *, char *, u32, struct smk_audit_info *);
int smk_curacc(char *, u32, struct smk_audit_info *);
int smk_access(struct smack_known *, struct smack_known *,
int, struct smk_audit_info *);
int smk_tskacc(struct task_smack *, struct smack_known *,
u32, struct smk_audit_info *);
int smk_curacc(struct smack_known *, u32, struct smk_audit_info *);
struct smack_known *smack_from_secid(const u32);
char *smk_parse_smack(const char *string, int len);
int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
char *smk_import(const char *, int);
struct smack_known *smk_import_entry(const char *, int);
void smk_insert_entry(struct smack_known *skp);
struct smack_known *smk_find_entry(const char *);
u32 smack_to_secid(const char *);
/*
* Shared data.
@ -253,7 +253,7 @@ extern int smack_cipso_mapped;
extern struct smack_known *smack_net_ambient;
extern struct smack_known *smack_onlycap;
extern struct smack_known *smack_syslog_label;
extern const char *smack_cipso_option;
extern struct smack_known smack_cipso_option;
extern int smack_ptrace_rule;
extern struct smack_known smack_known_floor;
@ -282,9 +282,9 @@ static inline int smk_inode_transmutable(const struct inode *isp)
}
/*
* Present a pointer to the smack label in an inode blob.
* Present a pointer to the smack label entry in an inode blob.
*/
static inline char *smk_of_inode(const struct inode *isp)
static inline struct smack_known *smk_of_inode(const struct inode *isp)
{
struct inode_smack *sip = isp->i_security;
return sip->smk_inode;

94
security/smack/smack_access.c
View File

@ -94,7 +94,7 @@ int smk_access_entry(char *subject_label, char *object_label,
struct smack_rule *srp;
list_for_each_entry_rcu(srp, rule_list, list) {
if (srp->smk_object == object_label &&
if (srp->smk_object->smk_known == object_label &&
srp->smk_subject->smk_known == subject_label) {
may = srp->smk_access;
break;
@ -111,8 +111,8 @@ int smk_access_entry(char *subject_label, char *object_label,
/**
* smk_access - determine if a subject has a specific access to an object
* @subject_known: a pointer to the subject's Smack label entry
* @object_label: a pointer to the object's Smack label
* @subject: a pointer to the subject's Smack label entry
* @object: a pointer to the object's Smack label entry
* @request: the access requested, in "MAY" format
* @a : a pointer to the audit data
*
@ -122,8 +122,8 @@ int smk_access_entry(char *subject_label, char *object_label,
*
* Smack labels are shared on smack_list
*/
int smk_access(struct smack_known *subject_known, char *object_label,
int request, struct smk_audit_info *a)
int smk_access(struct smack_known *subject, struct smack_known *object,
int request, struct smk_audit_info *a)
{
int may = MAY_NOT;
int rc = 0;
@ -133,7 +133,7 @@ int smk_access(struct smack_known *subject_known, char *object_label,
*
* A star subject can't access any object.
*/
if (subject_known == &smack_known_star) {
if (subject == &smack_known_star) {
rc = -EACCES;
goto out_audit;
}
@ -142,28 +142,28 @@ int smk_access(struct smack_known *subject_known, char *object_label,
* Tasks cannot be assigned the internet label.
* An internet subject can access any object.
*/
if (object_label == smack_known_web.smk_known ||
subject_known == &smack_known_web)
if (object == &smack_known_web ||
subject == &smack_known_web)
goto out_audit;
/*
* A star object can be accessed by any subject.
*/
if (object_label == smack_known_star.smk_known)
if (object == &smack_known_star)
goto out_audit;
/*
* An object can be accessed in any way by a subject
* with the same label.
*/
if (subject_known->smk_known == object_label)
if (subject->smk_known == object->smk_known)
goto out_audit;
/*
* A hat subject can read any object.
* A floor object can be read by any subject.
*/
if ((request & MAY_ANYREAD) == request) {
if (object_label == smack_known_floor.smk_known)
if (object == &smack_known_floor)
goto out_audit;
if (subject_known == &smack_known_hat)
if (subject == &smack_known_hat)
goto out_audit;
}
/*
@ -174,8 +174,8 @@ int smk_access(struct smack_known *subject_known, char *object_label,
* indicates there is no entry for this pair.
*/
rcu_read_lock();
may = smk_access_entry(subject_known->smk_known, object_label,
&subject_known->smk_rules);
may = smk_access_entry(subject->smk_known, object->smk_known,
&subject->smk_rules);
rcu_read_unlock();
if (may <= 0 || (request & may) != request) {
@ -195,8 +195,8 @@ int smk_access(struct smack_known *subject_known, char *object_label,
out_audit:
#ifdef CONFIG_AUDIT
if (a)
smack_log(subject_known->smk_known, object_label, request,
rc, a);
smack_log(subject->smk_known, object->smk_known,
request, rc, a);
#endif
return rc;
@ -204,8 +204,8 @@ out_audit:
/**
* smk_tskacc - determine if a task has a specific access to an object
* @tsp: a pointer to the subject task
* @obj_label: a pointer to the object's Smack label
* @tsp: a pointer to the subject's task
* @obj_known: a pointer to the object's label entry
* @mode: the access requested, in "MAY" format
* @a : common audit data
*
@ -214,24 +214,25 @@ out_audit:
* non zero otherwise. It allows that the task may have the capability
* to override the rules.
*/
int smk_tskacc(struct task_smack *subject, char *obj_label,
int smk_tskacc(struct task_smack *tsp, struct smack_known *obj_known,
u32 mode, struct smk_audit_info *a)
{
struct smack_known *skp = smk_of_task(subject);
struct smack_known *sbj_known = smk_of_task(tsp);
int may;
int rc;
/*
* Check the global rule list
*/
rc = smk_access(skp, obj_label, mode, NULL);
rc = smk_access(sbj_known, obj_known, mode, NULL);
if (rc >= 0) {
/*
* If there is an entry in the task's rule list
* it can further restrict access.
*/
may = smk_access_entry(skp->smk_known, obj_label,
&subject->smk_rules);
may = smk_access_entry(sbj_known->smk_known,
obj_known->smk_known,
&tsp->smk_rules);
if (may < 0)
goto out_audit;
if ((mode & may) == mode)
@ -248,14 +249,15 @@ int smk_tskacc(struct task_smack *subject, char *obj_label,
out_audit:
#ifdef CONFIG_AUDIT
if (a)
smack_log(skp->smk_known, obj_label, mode, rc, a);
smack_log(sbj_known->smk_known, obj_known->smk_known,
mode, rc, a);
#endif
return rc;
}
/**
* smk_curacc - determine if current has a specific access to an object
* @obj_label: a pointer to the object's Smack label
* @obj_known: a pointer to the object's Smack label entry
* @mode: the access requested, in "MAY" format
* @a : common audit data
*
@ -264,11 +266,12 @@ out_audit:
* non zero otherwise. It allows that current may have the capability
* to override the rules.
*/
int smk_curacc(char *obj_label, u32 mode, struct smk_audit_info *a)
int smk_curacc(struct smack_known *obj_known,
u32 mode, struct smk_audit_info *a)
{
struct task_smack *tsp = current_security();
return smk_tskacc(tsp, obj_label, mode, a);
return smk_tskacc(tsp, obj_known, mode, a);
}
#ifdef CONFIG_AUDIT
@ -561,27 +564,6 @@ unlockout:
return skp;
}
/**
* smk_import - import a smack label
* @string: a text string that might be a Smack label
* @len: the maximum size, or zero if it is NULL terminated.
*
* Returns a pointer to the label in the label list that
* matches the passed string, adding it if necessary.
*/
char *smk_import(const char *string, int len)
{
struct smack_known *skp;
/* labels cannot begin with a '-' */
if (string[0] == '-')
return NULL;
skp = smk_import_entry(string, len);
if (skp == NULL)
return NULL;
return skp->smk_known;
}
/**
* smack_from_secid - find the Smack label associated with a secid
* @secid: an integer that might be associated with a Smack label
@ -608,19 +590,3 @@ struct smack_known *smack_from_secid(const u32 secid)
rcu_read_unlock();
return &smack_known_invalid;
}
/**
* smack_to_secid - find the secid associated with a Smack label
* @smack: the Smack label
*
* Returns the appropriate secid if there is one,
* otherwise 0
*/
u32 smack_to_secid(const char *smack)
{
struct smack_known *skp = smk_find_entry(smack);
if (skp == NULL)
return 0;
return skp->smk_secid;
}

299
security/smack/smack_lsm.c
View File

@ -78,8 +78,8 @@ static void smk_bu_mode(int mode, char *s)
#endif
#ifdef CONFIG_SECURITY_SMACK_BRINGUP
static int smk_bu_note(char *note, struct smack_known *sskp, char *osp,
int mode, int rc)
static int smk_bu_note(char *note, struct smack_known *sskp,
struct smack_known *oskp, int mode, int rc)
{
char acc[SMK_NUM_ACCESS_TYPE + 1];
@ -88,15 +88,16 @@ static int smk_bu_note(char *note, struct smack_known *sskp, char *osp,
smk_bu_mode(mode, acc);
pr_info("Smack Bringup: (%s %s %s) %s\n",
sskp->smk_known, osp, acc, note);
sskp->smk_known, oskp->smk_known, acc, note);
return 0;
}
#else
#define smk_bu_note(note, sskp, osp, mode, RC) (RC)
#define smk_bu_note(note, sskp, oskp, mode, RC) (RC)
#endif
#ifdef CONFIG_SECURITY_SMACK_BRINGUP
static int smk_bu_current(char *note, char *osp, int mode, int rc)
static int smk_bu_current(char *note, struct smack_known *oskp,
int mode, int rc)
{
struct task_smack *tsp = current_security();
char acc[SMK_NUM_ACCESS_TYPE + 1];
@ -106,11 +107,12 @@ static int smk_bu_current(char *note, char *osp, int mode, int rc)
smk_bu_mode(mode, acc);
pr_info("Smack Bringup: (%s %s %s) %s %s\n",
tsp->smk_task->smk_known, osp, acc, current->comm, note);
tsp->smk_task->smk_known, oskp->smk_known,
acc, current->comm, note);
return 0;
}
#else
#define smk_bu_current(note, osp, mode, RC) (RC)
#define smk_bu_current(note, oskp, mode, RC) (RC)
#endif
#ifdef CONFIG_SECURITY_SMACK_BRINGUP
@ -144,7 +146,7 @@ static int smk_bu_inode(struct inode *inode, int mode, int rc)
smk_bu_mode(mode, acc);
pr_info("Smack Bringup: (%s %s %s) inode=(%s %ld) %s\n",
tsp->smk_task->smk_known, smk_of_inode(inode), acc,
tsp->smk_task->smk_known, smk_of_inode(inode)->smk_known, acc,
inode->i_sb->s_id, inode->i_ino, current->comm);
return 0;
}
@ -188,7 +190,7 @@ static int smk_bu_credfile(const struct cred *cred, struct file *file,
smk_bu_mode(mode, acc);
pr_info("Smack Bringup: (%s %s %s) file=(%s %ld %s) %s\n",
sskp->smk_known, smk_of_inode(inode), acc,
sskp->smk_known, smk_of_inode(inode)->smk_known, acc,
inode->i_sb->s_id, inode->i_ino, file->f_dentry->d_name.name,
current->comm);
return 0;
@ -230,11 +232,11 @@ static struct smack_known *smk_fetch(const char *name, struct inode *ip,
/**
* new_inode_smack - allocate an inode security blob
* @smack: a pointer to the Smack label to use in the blob
* @skp: a pointer to the Smack label entry to use in the blob
*
* Returns the new blob or NULL if there's no memory available
*/
struct inode_smack *new_inode_smack(char *smack)
struct inode_smack *new_inode_smack(struct smack_known *skp)
{
struct inode_smack *isp;
@ -242,7 +244,7 @@ struct inode_smack *new_inode_smack(char *smack)
if (isp == NULL)
return NULL;
isp->smk_inode = smack;
isp->smk_inode = skp;
isp->smk_flags = 0;
mutex_init(&isp->smk_lock);
@ -321,20 +323,20 @@ static inline unsigned int smk_ptrace_mode(unsigned int mode)
/**
* smk_ptrace_rule_check - helper for ptrace access
* @tracer: tracer process
* @tracee_label: label of the process that's about to be traced,
* the pointer must originate from smack structures
* @tracee_known: label entry of the process that's about to be traced
* @mode: ptrace attachment mode (PTRACE_MODE_*)
* @func: name of the function that called us, used for audit
*
* Returns 0 on access granted, -error on error
*/
static int smk_ptrace_rule_check(struct task_struct *tracer, char *tracee_label,
static int smk_ptrace_rule_check(struct task_struct *tracer,
struct smack_known *tracee_known,
unsigned int mode, const char *func)
{
int rc;
struct smk_audit_info ad, *saip = NULL;
struct task_smack *tsp;
struct smack_known *skp;
struct smack_known *tracer_known;
if ((mode & PTRACE_MODE_NOAUDIT) == 0) {
smk_ad_init(&ad, func, LSM_AUDIT_DATA_TASK);
@ -343,12 +345,12 @@ static int smk_ptrace_rule_check(struct task_struct *tracer, char *tracee_label,
}
tsp = task_security(tracer);
skp = smk_of_task(tsp);
tracer_known = smk_of_task(tsp);
if ((mode & PTRACE_MODE_ATTACH) &&
(smack_ptrace_rule == SMACK_PTRACE_EXACT ||
smack_ptrace_rule == SMACK_PTRACE_DRACONIAN)) {
if (skp->smk_known == tracee_label)
if (tracer_known->smk_known == tracee_known->smk_known)
rc = 0;
else if (smack_ptrace_rule == SMACK_PTRACE_DRACONIAN)
rc = -EACCES;
@ -358,13 +360,15 @@ static int smk_ptrace_rule_check(struct task_struct *tracer, char *tracee_label,
rc = -EACCES;
if (saip)
smack_log(skp->smk_known, tracee_label, 0, rc, saip);
smack_log(tracer_known->smk_known,
tracee_known->smk_known,
0, rc, saip);
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);
rc = smk_tskacc(tsp, tracee_known, smk_ptrace_mode(mode), saip);
return rc;
}
@ -393,7 +397,7 @@ static int smack_ptrace_access_check(struct task_struct *ctp, unsigned int mode)
skp = smk_of_task(task_security(ctp));
rc = smk_ptrace_rule_check(current, skp->smk_known, mode, __func__);
rc = smk_ptrace_rule_check(current, skp, mode, __func__);
return rc;
}
@ -416,8 +420,7 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
skp = smk_of_task(current_security());
rc = smk_ptrace_rule_check(ptp, skp->smk_known,
PTRACE_MODE_ATTACH, __func__);
rc = smk_ptrace_rule_check(ptp, skp, PTRACE_MODE_ATTACH, __func__);
return rc;
}
@ -461,10 +464,10 @@ static int smack_sb_alloc_security(struct super_block *sb)
if (sbsp == NULL)
return -ENOMEM;
sbsp->smk_root = smack_known_floor.smk_known;
sbsp->smk_default = smack_known_floor.smk_known;
sbsp->smk_floor = smack_known_floor.smk_known;
sbsp->smk_hat = smack_known_hat.smk_known;
sbsp->smk_root = &smack_known_floor;
sbsp->smk_default = &smack_known_floor;
sbsp->smk_floor = &smack_known_floor;
sbsp->smk_hat = &smack_known_hat;
/*
* smk_initialized will be zero from kzalloc.
*/
@ -548,7 +551,6 @@ static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
struct smack_known *skp;
char *op;
char *commap;
char *nsp;
int transmute = 0;
int specified = 0;
@ -564,38 +566,38 @@ static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
if (strncmp(op, SMK_FSHAT, strlen(SMK_FSHAT)) == 0) {
op += strlen(SMK_FSHAT);
nsp = smk_import(op, 0);
if (nsp != NULL) {
sp->smk_hat = nsp;
skp = smk_import_entry(op, 0);
if (skp != NULL) {
sp->smk_hat = skp;
specified = 1;
}
} else if (strncmp(op, SMK_FSFLOOR, strlen(SMK_FSFLOOR)) == 0) {
op += strlen(SMK_FSFLOOR);
nsp = smk_import(op, 0);
if (nsp != NULL) {
sp->smk_floor = nsp;
skp = smk_import_entry(op, 0);
if (skp != NULL) {
sp->smk_floor = skp;
specified = 1;
}
} else if (strncmp(op, SMK_FSDEFAULT,
strlen(SMK_FSDEFAULT)) == 0) {
op += strlen(SMK_FSDEFAULT);
nsp = smk_import(op, 0);
if (nsp != NULL) {
sp->smk_default = nsp;
skp = smk_import_entry(op, 0);
if (skp != NULL) {
sp->smk_default = skp;
specified = 1;
}
} else if (strncmp(op, SMK_FSROOT, strlen(SMK_FSROOT)) == 0) {
op += strlen(SMK_FSROOT);
nsp = smk_import(op, 0);
if (nsp != NULL) {
sp->smk_root = nsp;
skp = smk_import_entry(op, 0);
if (skp != NULL) {
sp->smk_root = skp;
specified = 1;
}
} else if (strncmp(op, SMK_FSTRANS, strlen(SMK_FSTRANS)) == 0) {
op += strlen(SMK_FSTRANS);
nsp = smk_import(op, 0);
if (nsp != NULL) {
sp->smk_root = nsp;
skp = smk_import_entry(op, 0);
if (skp != NULL) {
sp->smk_root = skp;
transmute = 1;
specified = 1;
}
@ -612,8 +614,8 @@ static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
* Unprivileged mounts get root and default from the caller.
*/
skp = smk_of_current();
sp->smk_root = skp->smk_known;
sp->smk_default = skp->smk_known;
sp->smk_root = skp;
sp->smk_default = skp;
}
/*
* Initialize the root inode.
@ -690,7 +692,7 @@ static int smack_bprm_set_creds(struct linux_binprm *bprm)
tracer = ptrace_parent(current);
if (likely(tracer != NULL))
rc = smk_ptrace_rule_check(tracer,
isp->smk_task->smk_known,
isp->smk_task,
PTRACE_MODE_ATTACH,
__func__);
rcu_read_unlock();
@ -751,7 +753,7 @@ static int smack_inode_alloc_security(struct inode *inode)
{
struct smack_known *skp = smk_of_current();
inode->i_security = new_inode_smack(skp->smk_known);
inode->i_security = new_inode_smack(skp);
if (inode->i_security == NULL)
return -ENOMEM;
return 0;
@ -786,8 +788,8 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
{
struct inode_smack *issp = inode->i_security;
struct smack_known *skp = smk_of_current();
char *isp = smk_of_inode(inode);
char *dsp = smk_of_inode(dir);
struct smack_known *isp = smk_of_inode(inode);
struct smack_known *dsp = smk_of_inode(dir);
int may;
if (name)
@ -795,7 +797,8 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
if (value) {
rcu_read_lock();
may = smk_access_entry(skp->smk_known, dsp, &skp->smk_rules);
may = smk_access_entry(skp->smk_known, dsp->smk_known,
&skp->smk_rules);
rcu_read_unlock();
/*
@ -810,13 +813,13 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
issp->smk_flags |= SMK_INODE_CHANGED;
}
*value = kstrdup(isp, GFP_NOFS);
*value = kstrdup(isp->smk_known, GFP_NOFS);
if (*value == NULL)
return -ENOMEM;
}
if (len)
*len = strlen(isp);
*len = strlen(isp->smk_known);
return 0;
}
@ -832,7 +835,7 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
static int smack_inode_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *new_dentry)
{
char *isp;
struct smack_known *isp;
struct smk_audit_info ad;
int rc;
@ -939,7 +942,7 @@ static int smack_inode_rename(struct inode *old_inode,
struct dentry *new_dentry)
{
int rc;
char *isp;
struct smack_known *isp;
struct smk_audit_info ad;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_DENTRY);
@ -1127,9 +1130,9 @@ static void smack_inode_post_setxattr(struct dentry *dentry, const char *name,
if (strcmp(name, XATTR_NAME_SMACK) == 0) {
skp = smk_import_entry(value, size);
if (skp != NULL)
isp->smk_inode = skp->smk_known;
isp->smk_inode = skp;
else
isp->smk_inode = smack_known_invalid.smk_known;
isp->smk_inode = &smack_known_invalid;
} else if (strcmp(name, XATTR_NAME_SMACKEXEC) == 0) {
skp = smk_import_entry(value, size);
if (skp != NULL)
@ -1238,14 +1241,14 @@ static int smack_inode_getsecurity(const struct inode *inode,
struct socket *sock;
struct super_block *sbp;
struct inode *ip = (struct inode *)inode;
char *isp;
struct smack_known *isp;
int ilen;
int rc = 0;
if (strcmp(name, XATTR_SMACK_SUFFIX) == 0) {
isp = smk_of_inode(inode);
ilen = strlen(isp);
*buffer = isp;
ilen = strlen(isp->smk_known);
*buffer = isp->smk_known;
return ilen;
}
@ -1263,15 +1266,15 @@ static int smack_inode_getsecurity(const struct inode *inode,
ssp = sock->sk->sk_security;
if (strcmp(name, XATTR_SMACK_IPIN) == 0)
isp = ssp->smk_in->smk_known;
isp = ssp->smk_in;
else if (strcmp(name, XATTR_SMACK_IPOUT) == 0)
isp = ssp->smk_out->smk_known;
isp = ssp->smk_out;
else
return -EOPNOTSUPP;
ilen = strlen(isp);
ilen = strlen(isp->smk_known);
if (rc == 0) {
*buffer = isp;
*buffer = isp->smk_known;
rc = ilen;
}
@ -1307,7 +1310,7 @@ static void smack_inode_getsecid(const struct inode *inode, u32 *secid)
{
struct inode_smack *isp = inode->i_security;
*secid = smack_to_secid(isp->smk_inode);
*secid = isp->smk_inode->smk_secid;
}
/*
@ -1346,7 +1349,7 @@ static int smack_file_alloc_security(struct file *file)
{
struct smack_known *skp = smk_of_current();
file->f_security = skp->smk_known;
file->f_security = skp;
return 0;
}
@ -1474,7 +1477,7 @@ static int smack_mmap_file(struct file *file,
struct smack_known *mkp;
struct smack_rule *srp;
struct task_smack *tsp;
char *osmack;
struct smack_known *okp;
struct inode_smack *isp;
int may;
int mmay;
@ -1500,18 +1503,19 @@ static int smack_mmap_file(struct file *file,
* to that rule's object label.
*/
list_for_each_entry_rcu(srp, &skp->smk_rules, list) {
osmack = srp->smk_object;
okp = srp->smk_object;
/*
* Matching labels always allows access.
*/
if (mkp->smk_known == osmack)
if (mkp->smk_known == okp->smk_known)
continue;
/*
* If there is a matching local rule take
* that into account as well.
*/
may = smk_access_entry(srp->smk_subject->smk_known, osmack,
&tsp->smk_rules);
may = smk_access_entry(srp->smk_subject->smk_known,
okp->smk_known,
&tsp->smk_rules);
if (may == -ENOENT)
may = srp->smk_access;
else
@ -1528,8 +1532,8 @@ static int smack_mmap_file(struct file *file,
* If there isn't one a SMACK64MMAP subject
* can't have as much access as current.
*/
mmay = smk_access_entry(mkp->smk_known, osmack,
&mkp->smk_rules);
mmay = smk_access_entry(mkp->smk_known, okp->smk_known,
&mkp->smk_rules);
if (mmay == -ENOENT) {
rc = -EACCES;
break;
@ -1538,8 +1542,8 @@ static int smack_mmap_file(struct file *file,
* If there is a local entry it modifies the
* potential access, too.
*/
tmay = smk_access_entry(mkp->smk_known, osmack,
&tsp->smk_rules);
tmay = smk_access_entry(mkp->smk_known, okp->smk_known,
&tsp->smk_rules);
if (tmay != -ENOENT)
mmay &= tmay;
@ -1570,7 +1574,7 @@ static int smack_file_set_fowner(struct file *file)
{
struct smack_known *skp = smk_of_current();
file->f_security = skp->smk_known;
file->f_security = skp;
return 0;
}
@ -1600,15 +1604,15 @@ static int smack_file_send_sigiotask(struct task_struct *tsk,
file = container_of(fown, struct file, f_owner);
/* we don't log here as rc can be overriden */
skp = smk_find_entry(file->f_security);
rc = smk_access(skp, tkp->smk_known, MAY_WRITE, NULL);
rc = smk_bu_note("sigiotask", skp, tkp->smk_known, MAY_WRITE, rc);
skp = file->f_security;
rc = smk_access(skp, tkp, MAY_WRITE, NULL);
rc = smk_bu_note("sigiotask", skp, tkp, MAY_WRITE, rc);
if (rc != 0 && has_capability(tsk, CAP_MAC_OVERRIDE))
rc = 0;
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, tsk);
smack_log(file->f_security, tkp->smk_known, MAY_WRITE, rc, &ad);
smack_log(skp->smk_known, tkp->smk_known, MAY_WRITE, rc, &ad);
return rc;
}
@ -1805,7 +1809,7 @@ static int smack_kernel_create_files_as(struct cred *new,
struct inode_smack *isp = inode->i_security;
struct task_smack *tsp = new->security;
tsp->smk_forked = smk_find_entry(isp->smk_inode);
tsp->smk_forked = isp->smk_inode;
tsp->smk_task = tsp->smk_forked;
return 0;
}
@ -1827,7 +1831,7 @@ static int smk_curacc_on_task(struct task_struct *p, int access,
smk_ad_init(&ad, caller, LSM_AUDIT_DATA_TASK);
smk_ad_setfield_u_tsk(&ad, p);
rc = smk_curacc(skp->smk_known, access, &ad);
rc = smk_curacc(skp, access, &ad);
rc = smk_bu_task(p, access, rc);
return rc;
}
@ -1992,7 +1996,7 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
* can write the receiver.
*/
if (secid == 0) {
rc = smk_curacc(tkp->smk_known, MAY_WRITE, &ad);
rc = smk_curacc(tkp, MAY_WRITE, &ad);
rc = smk_bu_task(p, MAY_WRITE, rc);
return rc;
}
@ -2002,8 +2006,8 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
* we can't take privilege into account.
*/
skp = smack_from_secid(secid);
rc = smk_access(skp, tkp->smk_known, MAY_WRITE, &ad);
rc = smk_bu_note("USB signal", skp, tkp->smk_known, MAY_WRITE, rc);
rc = smk_access(skp, tkp, MAY_WRITE, &ad);
rc = smk_bu_note("USB signal", skp, tkp, MAY_WRITE, rc);
return rc;
}
@ -2038,7 +2042,7 @@ 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));
isp->smk_inode = skp->smk_known;
isp->smk_inode = skp;
}
/*
@ -2096,7 +2100,7 @@ static void smack_sk_free_security(struct sock *sk)
*
* Returns the label of the far end or NULL if it's not special.
*/
static char *smack_host_label(struct sockaddr_in *sip)
static struct smack_known *smack_host_label(struct sockaddr_in *sip)
{
struct smk_netlbladdr *snp;
struct in_addr *siap = &sip->sin_addr;
@ -2113,7 +2117,7 @@ static char *smack_host_label(struct sockaddr_in *sip)
if ((&snp->smk_host.sin_addr)->s_addr ==
(siap->s_addr & (&snp->smk_mask)->s_addr)) {
/* we have found the special CIPSO option */
if (snp->smk_label == smack_cipso_option)
if (snp->smk_label == &smack_cipso_option)
return NULL;
return snp->smk_label;
}
@ -2178,13 +2182,13 @@ static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
struct smack_known *skp;
int rc;
int sk_lbl;
char *hostsp;
struct smack_known *hkp;
struct socket_smack *ssp = sk->sk_security;
struct smk_audit_info ad;
rcu_read_lock();
hostsp = smack_host_label(sap);
if (hostsp != NULL) {
hkp = smack_host_label(sap);
if (hkp != NULL) {
#ifdef CONFIG_AUDIT
struct lsm_network_audit net;
@ -2195,8 +2199,8 @@ static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
#endif
sk_lbl = SMACK_UNLABELED_SOCKET;
skp = ssp->smk_out;
rc = smk_access(skp, hostsp, MAY_WRITE, &ad);
rc = smk_bu_note("IPv4 host check", skp, hostsp, MAY_WRITE, rc);
rc = smk_access(skp, hkp, MAY_WRITE, &ad);
rc = smk_bu_note("IPv4 host check", skp, hkp, MAY_WRITE, rc);
} else {
sk_lbl = SMACK_CIPSO_SOCKET;
rc = 0;
@ -2297,7 +2301,7 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr_in6 *address,
struct socket_smack *ssp = sk->sk_security;
struct smack_known *skp;
unsigned short port = 0;
char *object;
struct smack_known *object;
struct smk_audit_info ad;
int rc;
#ifdef CONFIG_AUDIT
@ -2306,10 +2310,10 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr_in6 *address,
if (act == SMK_RECEIVING) {
skp = smack_net_ambient;
object = ssp->smk_in->smk_known;
object = ssp->smk_in;
} else {
skp = ssp->smk_out;
object = smack_net_ambient->smk_known;
object = smack_net_ambient;
}
/*
@ -2336,7 +2340,7 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr_in6 *address,
list_for_each_entry(spp, &smk_ipv6_port_list, list) {
if (spp->smk_port != port)
continue;
object = spp->smk_in->smk_known;
object = spp->smk_in;
if (act == SMK_CONNECTING)
ssp->smk_packet = spp->smk_out;
break;
@ -2387,7 +2391,7 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name,
return -EINVAL;
if (strcmp(name, XATTR_SMACK_SUFFIX) == 0) {
nsp->smk_inode = skp->smk_known;
nsp->smk_inode = skp;
nsp->smk_flags |= SMK_INODE_INSTANT;
return 0;
}
@ -2529,7 +2533,7 @@ static int smack_msg_msg_alloc_security(struct msg_msg *msg)
{
struct smack_known *skp = smk_of_current();
msg->security = skp->smk_known;
msg->security = skp;
return 0;
}
@ -2550,9 +2554,9 @@ static void smack_msg_msg_free_security(struct msg_msg *msg)
*
* Returns a pointer to the smack value
*/
static char *smack_of_shm(struct shmid_kernel *shp)
static struct smack_known *smack_of_shm(struct shmid_kernel *shp)
{
return (char *)shp->shm_perm.security;
return (struct smack_known *)shp->shm_perm.security;
}
/**
@ -2566,7 +2570,7 @@ static int smack_shm_alloc_security(struct shmid_kernel *shp)
struct kern_ipc_perm *isp = &shp->shm_perm;
struct smack_known *skp = smk_of_current();
isp->security = skp->smk_known;
isp->security = skp;
return 0;
}
@ -2592,7 +2596,7 @@ static void smack_shm_free_security(struct shmid_kernel *shp)
*/
static int smk_curacc_shm(struct shmid_kernel *shp, int access)
{
char *ssp = smack_of_shm(shp);
struct smack_known *ssp = smack_of_shm(shp);
struct smk_audit_info ad;
int rc;
@ -2677,9 +2681,9 @@ static int smack_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr,
*
* Returns a pointer to the smack value
*/
static char *smack_of_sem(struct sem_array *sma)
static struct smack_known *smack_of_sem(struct sem_array *sma)
{
return (char *)sma->sem_perm.security;
return (struct smack_known *)sma->sem_perm.security;
}
/**
@ -2693,7 +2697,7 @@ static int smack_sem_alloc_security(struct sem_array *sma)
struct kern_ipc_perm *isp = &sma->sem_perm;
struct smack_known *skp = smk_of_current();
isp->security = skp->smk_known;
isp->security = skp;
return 0;
}
@ -2719,7 +2723,7 @@ static void smack_sem_free_security(struct sem_array *sma)
*/
static int smk_curacc_sem(struct sem_array *sma, int access)
{
char *ssp = smack_of_sem(sma);
struct smack_known *ssp = smack_of_sem(sma);
struct smk_audit_info ad;
int rc;
@ -2815,7 +2819,7 @@ static int smack_msg_queue_alloc_security(struct msg_queue *msq)
struct kern_ipc_perm *kisp = &msq->q_perm;
struct smack_known *skp = smk_of_current();
kisp->security = skp->smk_known;
kisp->security = skp;
return 0;
}
@ -2836,11 +2840,11 @@ static void smack_msg_queue_free_security(struct msg_queue *msq)
* smack_of_msq - the smack pointer for the msq
* @msq: the object
*
* Returns a pointer to the smack value
* Returns a pointer to the smack label entry
*/
static char *smack_of_msq(struct msg_queue *msq)
static struct smack_known *smack_of_msq(struct msg_queue *msq)
{
return (char *)msq->q_perm.security;
return (struct smack_known *)msq->q_perm.security;
}
/**
@ -2852,7 +2856,7 @@ static char *smack_of_msq(struct msg_queue *msq)
*/
static int smk_curacc_msq(struct msg_queue *msq, int access)
{
char *msp = smack_of_msq(msq);
struct smack_known *msp = smack_of_msq(msq);
struct smk_audit_info ad;
int rc;
@ -2955,7 +2959,7 @@ static int smack_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
*/
static int smack_ipc_permission(struct kern_ipc_perm *ipp, short flag)
{
char *isp = ipp->security;
struct smack_known *iskp = ipp->security;
int may = smack_flags_to_may(flag);
struct smk_audit_info ad;
int rc;
@ -2964,8 +2968,8 @@ static int smack_ipc_permission(struct kern_ipc_perm *ipp, short flag)
smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
ad.a.u.ipc_id = ipp->id;
#endif
rc = smk_curacc(isp, may, &ad);
rc = smk_bu_current("svipc", isp, may, rc);
rc = smk_curacc(iskp, may, &ad);
rc = smk_bu_current("svipc", iskp, may, rc);
return rc;
}
@ -2976,9 +2980,9 @@ static int smack_ipc_permission(struct kern_ipc_perm *ipp, short flag)
*/
static void smack_ipc_getsecid(struct kern_ipc_perm *ipp, u32 *secid)
{
char *smack = ipp->security;
struct smack_known *iskp = ipp->security;
*secid = smack_to_secid(smack);
*secid = iskp->smk_secid;
}
/**
@ -2995,7 +2999,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
struct inode_smack *isp;
struct smack_known *skp;
struct smack_known *ckp = smk_of_current();
char *final;
struct smack_known *final;
char trattr[TRANS_TRUE_SIZE];
int transflag = 0;
int rc;
@ -3035,8 +3039,8 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* so there's no opportunity to set the mount
* options.
*/
sbsp->smk_root = smack_known_star.smk_known;
sbsp->smk_default = smack_known_star.smk_known;
sbsp->smk_root = &smack_known_star;
sbsp->smk_default = &smack_known_star;
}
isp->smk_inode = sbsp->smk_root;
isp->smk_flags |= SMK_INODE_INSTANT;
@ -3066,7 +3070,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
*
* Cgroupfs is special
*/
final = smack_known_star.smk_known;
final = &smack_known_star;
break;
case DEVPTS_SUPER_MAGIC:
/*
@ -3074,7 +3078,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* Programs that change smack have to treat the
* pty with respect.
*/
final = ckp->smk_known;
final = ckp;
break;
case PROC_SUPER_MAGIC:
/*
@ -3088,7 +3092,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* but watch out, because they're volitile,
* getting recreated on every reboot.
*/
final = smack_known_star.smk_known;
final = &smack_known_star;
/*
* No break.
*
@ -3107,7 +3111,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* UNIX domain sockets use lower level socket data.
*/
if (S_ISSOCK(inode->i_mode)) {
final = smack_known_star.smk_known;
final = &smack_known_star;
break;
}
/*
@ -3124,7 +3128,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
dp = dget(opt_dentry);
skp = smk_fetch(XATTR_NAME_SMACK, inode, dp);
if (skp != NULL)
final = skp->smk_known;
final = skp;
/*
* Transmuting directory
@ -3173,7 +3177,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
}
if (final == NULL)
isp->smk_inode = ckp->smk_known;
isp->smk_inode = ckp;
else
isp->smk_inode = final;
@ -3298,12 +3302,11 @@ static int smack_unix_stream_connect(struct sock *sock,
smk_ad_init_net(&ad, __func__, LSM_AUDIT_DATA_NET, &net);
smk_ad_setfield_u_net_sk(&ad, other);
#endif
rc = smk_access(skp, okp->smk_known, MAY_WRITE, &ad);
rc = smk_bu_note("UDS connect", skp, okp->smk_known,
MAY_WRITE, rc);
rc = smk_access(skp, okp, MAY_WRITE, &ad);
rc = smk_bu_note("UDS connect", skp, okp, MAY_WRITE, rc);
if (rc == 0) {
rc = smk_access(okp, skp->smk_known, MAY_WRITE, NULL);
rc = smk_bu_note("UDS connect", okp, skp->smk_known,
rc = smk_access(okp, skp, MAY_WRITE, NULL);
rc = smk_bu_note("UDS connect", okp, skp,
MAY_WRITE, rc);
}
}
@ -3331,7 +3334,6 @@ static int smack_unix_may_send(struct socket *sock, struct socket *other)
{
struct socket_smack *ssp = sock->sk->sk_security;
struct socket_smack *osp = other->sk->sk_security;
struct smack_known *skp;
struct smk_audit_info ad;
int rc;
@ -3345,10 +3347,8 @@ static int smack_unix_may_send(struct socket *sock, struct socket *other)
if (smack_privileged(CAP_MAC_OVERRIDE))
return 0;
skp = ssp->smk_out;
rc = smk_access(skp, osp->smk_in->smk_known, MAY_WRITE, &ad);
rc = smk_bu_note("UDS send", skp, osp->smk_in->smk_known,
MAY_WRITE, rc);
rc = smk_access(ssp->smk_out, osp->smk_in, MAY_WRITE, &ad);
rc = smk_bu_note("UDS send", ssp->smk_out, osp->smk_in, MAY_WRITE, rc);
return rc;
}
@ -3563,8 +3563,8 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
* This is the simplist possible security model
* for networking.
*/
rc = smk_access(skp, ssp->smk_in->smk_known, MAY_WRITE, &ad);
rc = smk_bu_note("IPv4 delivery", skp, ssp->smk_in->smk_known,
rc = smk_access(skp, ssp->smk_in, MAY_WRITE, &ad);
rc = smk_bu_note("IPv4 delivery", skp, ssp->smk_in,
MAY_WRITE, rc);
if (rc != 0)
netlbl_skbuff_err(skb, rc, 0);
@ -3708,7 +3708,7 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
struct netlbl_lsm_secattr secattr;
struct sockaddr_in addr;
struct iphdr *hdr;
char *hsp;
struct smack_known *hskp;
int rc;
struct smk_audit_info ad;
#ifdef CONFIG_AUDIT
@ -3745,9 +3745,8 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
* Receiving a packet requires that the other end be able to write
* here. Read access is not required.
*/
rc = smk_access(skp, ssp->smk_in->smk_known, MAY_WRITE, &ad);
rc = smk_bu_note("IPv4 connect", skp, ssp->smk_in->smk_known,
MAY_WRITE, rc);
rc = smk_access(skp, ssp->smk_in, MAY_WRITE, &ad);
rc = smk_bu_note("IPv4 connect", skp, ssp->smk_in, MAY_WRITE, rc);
if (rc != 0)
return rc;
@ -3765,10 +3764,10 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
hdr = ip_hdr(skb);
addr.sin_addr.s_addr = hdr->saddr;
rcu_read_lock();
hsp = smack_host_label(&addr);
hskp = smack_host_label(&addr);
rcu_read_unlock();
if (hsp == NULL)
if (hskp == NULL)
rc = netlbl_req_setattr(req, &skp->smk_netlabel);
else
netlbl_req_delattr(req);
@ -3820,7 +3819,7 @@ static int smack_key_alloc(struct key *key, const struct cred *cred,
{
struct smack_known *skp = smk_of_task(cred->security);
key->security = skp->smk_known;
key->security = skp;
return 0;
}
@ -3909,6 +3908,7 @@ static int smack_key_permission(key_ref_t key_ref,
*/
static int smack_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule)
{
struct smack_known *skp;
char **rule = (char **)vrule;
*rule = NULL;
@ -3918,7 +3918,9 @@ static int smack_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule)
if (op != Audit_equal && op != Audit_not_equal)
return -EINVAL;
*rule = smk_import(rulestr, 0);
skp = smk_import_entry(rulestr, 0);
if (skp)
*rule = skp->smk_known;
return 0;
}
@ -4037,7 +4039,12 @@ static int smack_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
*/
static int smack_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
{
*secid = smack_to_secid(secdata);
struct smack_known *skp = smk_find_entry(secdata);
if (skp)
*secid = skp->smk_secid;
else
*secid = 0;
return 0;
}

61
security/smack/smackfs.c
View File

@ -131,14 +131,17 @@ LIST_HEAD(smack_rule_list);
struct smack_parsed_rule {
struct smack_known *smk_subject;
char *smk_object;
struct smack_known *smk_object;
int smk_access1;
int smk_access2;
};
static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT;
const char *smack_cipso_option = SMACK_CIPSO_OPTION;
struct smack_known smack_cipso_option = {
.smk_known = SMACK_CIPSO_OPTION,
.smk_secid = 0,
};
/*
* Values for parsing cipso rules
@ -339,7 +342,7 @@ static int smk_fill_rule(const char *subject, const char *object,
if (rule->smk_subject == NULL)
return -EINVAL;
rule->smk_object = smk_import(object, len);
rule->smk_object = smk_import_entry(object, len);
if (rule->smk_object == NULL)
return -EINVAL;
} else {
@ -359,7 +362,7 @@ static int smk_fill_rule(const char *subject, const char *object,
kfree(cp);
if (skp == NULL)
return -ENOENT;
rule->smk_object = skp->smk_known;
rule->smk_object = skp;
}
rule->smk_access1 = smk_perm_from_str(access1);
@ -598,13 +601,15 @@ static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max)
* anything you read back.
*/
if (strlen(srp->smk_subject->smk_known) >= max ||
strlen(srp->smk_object) >= max)
strlen(srp->smk_object->smk_known) >= max)
return;
if (srp->smk_access == 0)
return;
seq_printf(s, "%s %s", srp->smk_subject->smk_known, srp->smk_object);
seq_printf(s, "%s %s",
srp->smk_subject->smk_known,
srp->smk_object->smk_known);
seq_putc(s, ' ');
@ -1073,7 +1078,7 @@ static int netlbladdr_seq_show(struct seq_file *s, void *v)
for (maskn = 0; temp_mask; temp_mask <<= 1, maskn++);
seq_printf(s, "%u.%u.%u.%u/%d %s\n",
hp[0], hp[1], hp[2], hp[3], maskn, skp->smk_label);
hp[0], hp[1], hp[2], hp[3], maskn, skp->smk_label->smk_known);
return 0;
}
@ -1153,10 +1158,10 @@ static void smk_netlbladdr_insert(struct smk_netlbladdr *new)
static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct smk_netlbladdr *skp;
struct smk_netlbladdr *snp;
struct sockaddr_in newname;
char *smack;
char *sp;
struct smack_known *skp;
char *data;
char *host = (char *)&newname.sin_addr.s_addr;
int rc;
@ -1219,15 +1224,15 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf,
* If smack begins with '-', it is an option, don't import it
*/
if (smack[0] != '-') {
sp = smk_import(smack, 0);
if (sp == NULL) {
skp = smk_import_entry(smack, 0);
if (skp == NULL) {
rc = -EINVAL;
goto free_out;
}
} else {
/* check known options */
if (strcmp(smack, smack_cipso_option) == 0)
sp = (char *)smack_cipso_option;
if (strcmp(smack, smack_cipso_option.smk_known) == 0)
skp = &smack_cipso_option;
else {
rc = -EINVAL;
goto free_out;
@ -1250,9 +1255,9 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf,
nsa = newname.sin_addr.s_addr;
/* try to find if the prefix is already in the list */
found = 0;
list_for_each_entry_rcu(skp, &smk_netlbladdr_list, list) {
if (skp->smk_host.sin_addr.s_addr == nsa &&
skp->smk_mask.s_addr == mask.s_addr) {
list_for_each_entry_rcu(snp, &smk_netlbladdr_list, list) {
if (snp->smk_host.sin_addr.s_addr == nsa &&
snp->smk_mask.s_addr == mask.s_addr) {
found = 1;
break;
}
@ -1260,26 +1265,26 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf,
smk_netlabel_audit_set(&audit_info);
if (found == 0) {
skp = kzalloc(sizeof(*skp), GFP_KERNEL);
if (skp == NULL)
snp = kzalloc(sizeof(*snp), GFP_KERNEL);
if (snp == NULL)
rc = -ENOMEM;
else {
rc = 0;
skp->smk_host.sin_addr.s_addr = newname.sin_addr.s_addr;
skp->smk_mask.s_addr = mask.s_addr;
skp->smk_label = sp;
smk_netlbladdr_insert(skp);
snp->smk_host.sin_addr.s_addr = newname.sin_addr.s_addr;
snp->smk_mask.s_addr = mask.s_addr;
snp->smk_label = skp;
smk_netlbladdr_insert(snp);
}
} else {
/* we delete the unlabeled entry, only if the previous label
* wasn't the special CIPSO option */
if (skp->smk_label != smack_cipso_option)
if (snp->smk_label != &smack_cipso_option)
rc = netlbl_cfg_unlbl_static_del(&init_net, NULL,
&skp->smk_host.sin_addr, &skp->smk_mask,
&snp->smk_host.sin_addr, &snp->smk_mask,
PF_INET, &audit_info);
else
rc = 0;
skp->smk_label = sp;
snp->smk_label = skp;
}
/*
@ -1287,10 +1292,10 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf,
* this host so that incoming packets get labeled.
* but only if we didn't get the special CIPSO option
*/
if (rc == 0 && sp != smack_cipso_option)
if (rc == 0 && skp != &smack_cipso_option)
rc = netlbl_cfg_unlbl_static_add(&init_net, NULL,
&skp->smk_host.sin_addr, &skp->smk_mask, PF_INET,
smack_to_secid(skp->smk_label), &audit_info);
&snp->smk_host.sin_addr, &snp->smk_mask, PF_INET,
snp->smk_label->smk_secid, &audit_info);
if (rc == 0)
rc = count;