diff options
Diffstat (limited to 'security')
| -rw-r--r-- | security/capability.c | 3 | ||||
| -rw-r--r-- | security/security.c | 5 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 12 |
3 files changed, 13 insertions, 7 deletions
diff --git a/security/capability.c b/security/capability.c index a0bbf30fb6dc..95a6599a37bb 100644 --- a/security/capability.c +++ b/security/capability.c @@ -411,7 +411,8 @@ static int cap_task_getioprio(struct task_struct *p) return 0; } -static int cap_task_setrlimit(unsigned int resource, struct rlimit *new_rlim) +static int cap_task_setrlimit(struct task_struct *p, unsigned int resource, + struct rlimit *new_rlim) { return 0; } diff --git a/security/security.c b/security/security.c index 7461b1bc296c..c53949f17d9e 100644 --- a/security/security.c +++ b/security/security.c @@ -780,9 +780,10 @@ int security_task_getioprio(struct task_struct *p) return security_ops->task_getioprio(p); } -int security_task_setrlimit(unsigned int resource, struct rlimit *new_rlim) +int security_task_setrlimit(struct task_struct *p, unsigned int resource, + struct rlimit *new_rlim) { - return security_ops->task_setrlimit(resource, new_rlim); + return security_ops->task_setrlimit(p, resource, new_rlim); } int security_task_setscheduler(struct task_struct *p, diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 9b40f4c0ac70..42043f96e54f 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2284,12 +2284,15 @@ static void selinux_bprm_committing_creds(struct linux_binprm *bprm) rc = avc_has_perm(new_tsec->osid, new_tsec->sid, SECCLASS_PROCESS, PROCESS__RLIMITINH, NULL); if (rc) { + /* protect against do_prlimit() */ + task_lock(current); for (i = 0; i < RLIM_NLIMITS; i++) { rlim = current->signal->rlim + i; initrlim = init_task.signal->rlim + i; rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur); } - update_rlimit_cpu(current->signal->rlim[RLIMIT_CPU].rlim_cur); + task_unlock(current); + update_rlimit_cpu(current, rlimit(RLIMIT_CPU)); } } @@ -3333,16 +3336,17 @@ static int selinux_task_getioprio(struct task_struct *p) return current_has_perm(p, PROCESS__GETSCHED); } -static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim) +static int selinux_task_setrlimit(struct task_struct *p, unsigned int resource, + struct rlimit *new_rlim) { - struct rlimit *old_rlim = current->signal->rlim + resource; + struct rlimit *old_rlim = p->signal->rlim + resource; /* Control the ability to change the hard limit (whether lowering or raising it), so that the hard limit can later be used as a safe reset point for the soft limit upon context transitions. See selinux_bprm_committing_creds. */ if (old_rlim->rlim_max != new_rlim->rlim_max) - return current_has_perm(current, PROCESS__SETRLIMIT); + return current_has_perm(p, PROCESS__SETRLIMIT); return 0; } |