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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

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Pull security subsystem fixes from James Morris.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  fcaps: clear the same personality flags as suid when fcaps are used
  mpi: Avoid using freed pointer in mpi_lshift_limbs()
  Smack: move label list initialization
This commit is contained in:
Linus Torvalds 2012-04-18 13:23:44 -07:00
commit b6a89584c3
4 changed files with 41 additions and 27 deletions
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5
lib/mpi/mpi-bit.c
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@ -177,8 +177,8 @@ int mpi_rshift(MPI x, MPI a, unsigned n)
*/ */
int mpi_lshift_limbs(MPI a, unsigned int count) int mpi_lshift_limbs(MPI a, unsigned int count)
{ {
mpi_ptr_t ap = a->d; const int n = a->nlimbs;
int n = a->nlimbs; mpi_ptr_t ap;
int i; int i;
if (!count || !n) if (!count || !n)
@ -187,6 +187,7 @@ int mpi_lshift_limbs(MPI a, unsigned int count)
if (RESIZE_IF_NEEDED(a, n + count) < 0) if (RESIZE_IF_NEEDED(a, n + count) < 0)
return -ENOMEM; return -ENOMEM;
ap = a->d;
for (i = n - 1; i >= 0; i--) for (i = n - 1; i >= 0; i--)
ap[i + count] = ap[i]; ap[i + count] = ap[i];
for (i = 0; i < count; i++) for (i = 0; i < count; i++)

5
security/commoncap.c
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@ -505,6 +505,11 @@ int cap_bprm_set_creds(struct linux_binprm *bprm)
} }
skip: skip:
/* if we have fs caps, clear dangerous personality flags */
if (!cap_issubset(new->cap_permitted, old->cap_permitted))
bprm->per_clear |= PER_CLEAR_ON_SETID;
/* Don't let someone trace a set[ug]id/setpcap binary with the revised /* Don't let someone trace a set[ug]id/setpcap binary with the revised
* credentials unless they have the appropriate permit * credentials unless they have the appropriate permit
*/ */

44
security/smack/smack_lsm.c
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@ -3640,8 +3640,38 @@ struct security_operations smack_ops = {
}; };
static __init void init_smack_know_list(void) static __init void init_smack_known_list(void)
{ {
/*
* Initialize CIPSO locks
*/
spin_lock_init(&smack_known_huh.smk_cipsolock);
spin_lock_init(&smack_known_hat.smk_cipsolock);
spin_lock_init(&smack_known_star.smk_cipsolock);
spin_lock_init(&smack_known_floor.smk_cipsolock);
spin_lock_init(&smack_known_invalid.smk_cipsolock);
spin_lock_init(&smack_known_web.smk_cipsolock);
/*
* Initialize rule list locks
*/
mutex_init(&smack_known_huh.smk_rules_lock);
mutex_init(&smack_known_hat.smk_rules_lock);
mutex_init(&smack_known_floor.smk_rules_lock);
mutex_init(&smack_known_star.smk_rules_lock);
mutex_init(&smack_known_invalid.smk_rules_lock);
mutex_init(&smack_known_web.smk_rules_lock);
/*
* Initialize rule lists
*/
INIT_LIST_HEAD(&smack_known_huh.smk_rules);
INIT_LIST_HEAD(&smack_known_hat.smk_rules);
INIT_LIST_HEAD(&smack_known_star.smk_rules);
INIT_LIST_HEAD(&smack_known_floor.smk_rules);
INIT_LIST_HEAD(&smack_known_invalid.smk_rules);
INIT_LIST_HEAD(&smack_known_web.smk_rules);
/*
* Create the known labels list
*/
list_add(&smack_known_huh.list, &smack_known_list); list_add(&smack_known_huh.list, &smack_known_list);
list_add(&smack_known_hat.list, &smack_known_list); list_add(&smack_known_hat.list, &smack_known_list);
list_add(&smack_known_star.list, &smack_known_list); list_add(&smack_known_star.list, &smack_known_list);
@ -3676,16 +3706,8 @@ static __init int smack_init(void)
cred = (struct cred *) current->cred; cred = (struct cred *) current->cred;
cred->security = tsp; cred->security = tsp;
/* initialize the smack_know_list */ /* initialize the smack_known_list */
init_smack_know_list(); init_smack_known_list();
/*
* Initialize locks
*/
spin_lock_init(&smack_known_huh.smk_cipsolock);
spin_lock_init(&smack_known_hat.smk_cipsolock);
spin_lock_init(&smack_known_star.smk_cipsolock);
spin_lock_init(&smack_known_floor.smk_cipsolock);
spin_lock_init(&smack_known_invalid.smk_cipsolock);
/* /*
* Register with LSM * Register with LSM

14
security/smack/smackfs.c
View File

@ -1614,20 +1614,6 @@ static int __init init_smk_fs(void)
smk_cipso_doi(); smk_cipso_doi();
smk_unlbl_ambient(NULL); smk_unlbl_ambient(NULL);
mutex_init(&smack_known_floor.smk_rules_lock);
mutex_init(&smack_known_hat.smk_rules_lock);
mutex_init(&smack_known_huh.smk_rules_lock);
mutex_init(&smack_known_invalid.smk_rules_lock);
mutex_init(&smack_known_star.smk_rules_lock);
mutex_init(&smack_known_web.smk_rules_lock);
INIT_LIST_HEAD(&smack_known_floor.smk_rules);
INIT_LIST_HEAD(&smack_known_hat.smk_rules);
INIT_LIST_HEAD(&smack_known_huh.smk_rules);
INIT_LIST_HEAD(&smack_known_invalid.smk_rules);
INIT_LIST_HEAD(&smack_known_star.smk_rules);
INIT_LIST_HEAD(&smack_known_web.smk_rules);
return err; return err;
} }