Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband

[linux-drm-fsl-dcu.git] / kernel / auditsc.c

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 105147631753f1b4f68fc17878a0e4531b436593..298897559ca4ab9d346566cfac6d50791371e9d3 100644 (file)
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -64,6 +64,7 @@
 #include <linux/tty.h>
 #include <linux/selinux.h>
 #include <linux/binfmts.h>
+#include <linux/highmem.h>
 #include <linux/syscalls.h>
 
 #include "audit.h"
@@ -278,8 +279,11 @@ static int audit_filter_rules(struct task_struct *tsk,
                        result = audit_comparator(tsk->pid, f->op, f->val);
                        break;
                case AUDIT_PPID:
-                       if (ctx)
+                       if (ctx) {
+                               if (!ctx->ppid)
+                                       ctx->ppid = sys_getppid();
                                result = audit_comparator(ctx->ppid, f->op, f->val);
+                       }
                        break;
                case AUDIT_UID:
                        result = audit_comparator(tsk->uid, f->op, f->val);
@@ -727,7 +731,7 @@ static inline void audit_free_context(struct audit_context *context)
                printk(KERN_ERR "audit: freed %d contexts\n", count);
 }
 
-static void audit_log_task_context(struct audit_buffer *ab)
+void audit_log_task_context(struct audit_buffer *ab)
 {
        char *ctx = NULL;
        ssize_t len = 0;
@@ -756,6 +760,8 @@ error_path:
        return;
 }
 
+EXPORT_SYMBOL(audit_log_task_context);
+
 static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
 {
        char name[sizeof(tsk->comm)];
@@ -775,8 +781,8 @@ static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk
                        if ((vma->vm_flags & VM_EXECUTABLE) &&
                            vma->vm_file) {
                                audit_log_d_path(ab, "exe=",
-                                                vma->vm_file->f_dentry,
-                                                vma->vm_file->f_vfsmnt);
+                                                vma->vm_file->f_path.dentry,
+                                                vma->vm_file->f_path.mnt);
                                break;
                        }
                        vma = vma->vm_next;
@@ -795,7 +801,8 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
 
        /* tsk == current */
        context->pid = tsk->pid;
-       context->ppid = sys_getppid();  /* sic.  tsk == current in all cases */
+       if (!context->ppid)
+               context->ppid = sys_getppid();
        context->uid = tsk->uid;
        context->gid = tsk->gid;
        context->euid = tsk->euid;
@@ -819,10 +826,12 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
                                 context->return_code);
 
        mutex_lock(&tty_mutex);
+       read_lock(&tasklist_lock);
        if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
                tty = tsk->signal->tty->name;
        else
                tty = "(none)";
+       read_unlock(&tasklist_lock);
        audit_log_format(ab,
                  " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
                  " ppid=%d pid=%d auid=%u uid=%u gid=%u"
@@ -1137,6 +1146,7 @@ void audit_syscall_entry(int arch, int major,
        context->ctime      = CURRENT_TIME;
        context->in_syscall = 1;
        context->auditable  = !!(state == AUDIT_RECORD_CONTEXT);
+       context->ppid       = 0;
 }
 
 /**
@@ -1352,7 +1362,13 @@ void __audit_inode_child(const char *dname, const struct inode *inode,
                }
 
 update_context:
-       idx = context->name_count++;
+       idx = context->name_count;
+       if (context->name_count == AUDIT_NAMES) {
+               printk(KERN_DEBUG "name_count maxed and losing %s\n",
+                       found_name ?: "(null)");
+               return;
+       }
+       context->name_count++;
 #if AUDIT_DEBUG
        context->ino_count++;
 #endif
@@ -1370,7 +1386,16 @@ update_context:
        /* A parent was not found in audit_names, so copy the inode data for the
         * provided parent. */
        if (!found_name) {
-               idx = context->name_count++;
+               idx = context->name_count;
+               if (context->name_count == AUDIT_NAMES) {
+                       printk(KERN_DEBUG
+                               "name_count maxed and losing parent inode data: dev=%02x:%02x, inode=%lu",
+                               MAJOR(parent->i_sb->s_dev),
+                               MINOR(parent->i_sb->s_dev),
+                               parent->i_ino);
+                       return;
+               }
+               context->name_count++;
 #if AUDIT_DEBUG
                context->ino_count++;
 #endif
@@ -1467,6 +1492,8 @@ uid_t audit_get_loginuid(struct audit_context *ctx)
        return ctx ? ctx->loginuid : -1;
 }
 
+EXPORT_SYMBOL(audit_get_loginuid);
+
 /**
  * __audit_mq_open - record audit data for a POSIX MQ open
  * @oflag: open flag