X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fproc%2Fbase.c;h=51be1ce34a0592cf4cd6d4853acfc0ec6e9a843c;hb=94b798ff0d7d4c30e38f9b61fc29fd17472221f9;hp=72d16e5325ae549ada7810ec7fc390da96a70457;hpb=7a99657f9dc3c00998e6313295832687b70ed52f;p=pandora-kernel.git

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 72d16e5325ae..51be1ce34a05 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -216,7 +216,7 @@ static struct mm_struct *mm_access(struct task_struct *task, unsigned int mode)
 
 struct mm_struct *mm_for_maps(struct task_struct *task)
 {
-	return mm_access(task, PTRACE_MODE_READ);
+	return mm_access(task, PTRACE_MODE_READ_FSCREDS);
 }
 
 static int proc_pid_cmdline(struct task_struct *task, char * buffer)
@@ -288,7 +288,7 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
 	wchan = get_wchan(task);
 
 	if (lookup_symbol_name(wchan, symname) < 0)
-		if (!ptrace_may_access(task, PTRACE_MODE_READ))
+		if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
 			return 0;
 		else
 			return sprintf(buffer, "%lu", wchan);
@@ -302,7 +302,7 @@ static int lock_trace(struct task_struct *task)
 	int err = mutex_lock_killable(&task->signal->cred_guard_mutex);
 	if (err)
 		return err;
-	if (!ptrace_may_access(task, PTRACE_MODE_ATTACH)) {
+	if (!ptrace_may_access(task, PTRACE_MODE_ATTACH_FSCREDS)) {
 		mutex_unlock(&task->signal->cred_guard_mutex);
 		return -EPERM;
 	}
@@ -544,7 +544,7 @@ static int proc_fd_access_allowed(struct inode *inode)
 	 */
 	task = get_proc_task(inode);
 	if (task) {
-		allowed = ptrace_may_access(task, PTRACE_MODE_READ);
+		allowed = ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS);
 		put_task_struct(task);
 	}
 	return allowed;
@@ -558,7 +558,7 @@ int proc_setattr(struct dentry *dentry, struct iattr *attr)
 	if (attr->ia_valid & ATTR_MODE)
 		return -EPERM;
 
-	error = inode_change_ok(inode, attr);
+	error = setattr_prepare(dentry, attr);
 	if (error)
 		return error;
 
@@ -769,7 +769,7 @@ static int mem_open(struct inode* inode, struct file* file)
 	if (!task)
 		return -ESRCH;
 
-	mm = mm_access(task, PTRACE_MODE_ATTACH);
+	mm = mm_access(task, PTRACE_MODE_ATTACH | PTRACE_MODE_FSCREDS);
 	put_task_struct(task);
 
 	if (IS_ERR(mm))
@@ -905,7 +905,8 @@ static ssize_t environ_read(struct file *file, char __user *buf,
 
 	mm = mm_for_maps(task);
 	ret = PTR_ERR(mm);
-	if (!mm || IS_ERR(mm))
+	/* Ensure the process spawned far enough to have an environment. */
+	if (!mm || IS_ERR(mm) || !mm->env_end)
 		goto out_free;
 
 	ret = 0;
@@ -2626,7 +2627,7 @@ static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
 	if (result)
 		return result;
 
-	if (!ptrace_may_access(task, PTRACE_MODE_READ)) {
+	if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) {
 		result = -EACCES;
 		goto out_unlock;
 	}