Pull model-name into release branch

[powerpc.git] / kernel / auditsc.c

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 9618d15..1bd8827 100644 (file)
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -209,6 +209,54 @@ struct audit_context {
 #endif
 };
 
+#define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE])
+static inline int open_arg(int flags, int mask)
+{
+       int n = ACC_MODE(flags);
+       if (flags & (O_TRUNC | O_CREAT))
+               n |= AUDIT_PERM_WRITE;
+       return n & mask;
+}
+
+static int audit_match_perm(struct audit_context *ctx, int mask)
+{
+       unsigned n = ctx->major;
+       switch (audit_classify_syscall(ctx->arch, n)) {
+       case 0: /* native */
+               if ((mask & AUDIT_PERM_WRITE) &&
+                    audit_match_class(AUDIT_CLASS_WRITE, n))
+                       return 1;
+               if ((mask & AUDIT_PERM_READ) &&
+                    audit_match_class(AUDIT_CLASS_READ, n))
+                       return 1;
+               if ((mask & AUDIT_PERM_ATTR) &&
+                    audit_match_class(AUDIT_CLASS_CHATTR, n))
+                       return 1;
+               return 0;
+       case 1: /* 32bit on biarch */
+               if ((mask & AUDIT_PERM_WRITE) &&
+                    audit_match_class(AUDIT_CLASS_WRITE_32, n))
+                       return 1;
+               if ((mask & AUDIT_PERM_READ) &&
+                    audit_match_class(AUDIT_CLASS_READ_32, n))
+                       return 1;
+               if ((mask & AUDIT_PERM_ATTR) &&
+                    audit_match_class(AUDIT_CLASS_CHATTR_32, n))
+                       return 1;
+               return 0;
+       case 2: /* open */
+               return mask & ACC_MODE(ctx->argv[1]);
+       case 3: /* openat */
+               return mask & ACC_MODE(ctx->argv[2]);
+       case 4: /* socketcall */
+               return ((mask & AUDIT_PERM_WRITE) && ctx->argv[0] == SYS_BIND);
+       case 5: /* execve */
+               return mask & AUDIT_PERM_EXEC;
+       default:
+               return 0;
+       }
+}
+
 /* Determine if any context name data matches a rule's watch data */
 /* Compare a task_struct with an audit_rule.  Return 1 on match, 0
  * otherwise. */
@@ -397,6 +445,9 @@ static int audit_filter_rules(struct task_struct *tsk,
                        /* ignore this field for filtering */
                        result = 1;
                        break;
+               case AUDIT_PERM:
+                       result = audit_match_perm(ctx, f->val);
+                       break;
                }
 
                if (!result)
@@ -534,17 +585,7 @@ static inline struct audit_context *audit_get_context(struct task_struct *tsk,
        }
 
 get_context:
-       context->pid = tsk->pid;
-       context->ppid = sys_getppid();  /* sic.  tsk == current in all cases */
-       context->uid = tsk->uid;
-       context->gid = tsk->gid;
-       context->euid = tsk->euid;
-       context->suid = tsk->suid;
-       context->fsuid = tsk->fsuid;
-       context->egid = tsk->egid;
-       context->sgid = tsk->sgid;
-       context->fsgid = tsk->fsgid;
-       context->personality = tsk->personality;
+
        tsk->audit_context = NULL;
        return context;
 }
@@ -753,6 +794,17 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
        const char *tty;
 
        /* tsk == current */
+       context->pid = tsk->pid;
+       context->ppid = sys_getppid();  /* sic.  tsk == current in all cases */
+       context->uid = tsk->uid;
+       context->gid = tsk->gid;
+       context->euid = tsk->euid;
+       context->suid = tsk->suid;
+       context->fsuid = tsk->fsuid;
+       context->egid = tsk->egid;
+       context->sgid = tsk->sgid;
+       context->fsgid = tsk->fsgid;
+       context->personality = tsk->personality;
 
        ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
        if (!ab)
@@ -1676,7 +1728,7 @@ int audit_bprm(struct linux_binprm *bprm)
        unsigned long p, next;
        void *to;
 
-       if (likely(!audit_enabled || !context))
+       if (likely(!audit_enabled || !context || context->dummy))
                return 0;
 
        ax = kmalloc(sizeof(*ax) + PAGE_SIZE * MAX_ARG_PAGES - bprm->p,
@@ -1714,7 +1766,7 @@ int audit_socketcall(int nargs, unsigned long *args)
        struct audit_aux_data_socketcall *ax;
        struct audit_context *context = current->audit_context;
 
-       if (likely(!context))
+       if (likely(!context || context->dummy))
                return 0;
 
        ax = kmalloc(sizeof(*ax) + nargs * sizeof(unsigned long), GFP_KERNEL);
@@ -1742,7 +1794,7 @@ int audit_sockaddr(int len, void *a)
        struct audit_aux_data_sockaddr *ax;
        struct audit_context *context = current->audit_context;
 
-       if (likely(!context))
+       if (likely(!context || context->dummy))
                return 0;
 
        ax = kmalloc(sizeof(*ax) + len, GFP_KERNEL);