x86: mce: Move per bank data in a single datastructure

[safe/jmp/linux-2.6] / fs / proc / base.c

diff --git a/fs/proc/base.c b/fs/proc/base.c
index e0afd32..1539e63 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -80,6 +80,7 @@
 #include <linux/oom.h>
 #include <linux/elf.h>
 #include <linux/pid_namespace.h>
+#include <linux/fs_struct.h>
 #include "internal.h"
 
 /* NOTE:
@@ -321,7 +322,10 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
        wchan = get_wchan(task);
 
        if (lookup_symbol_name(wchan, symname) < 0)
-               return sprintf(buffer, "%lu", wchan);
+               if (!ptrace_may_access(task, PTRACE_MODE_READ))
+                       return 0;
+               else
+                       return sprintf(buffer, "%lu", wchan);
        else
                return sprintf(buffer, "%s", symname);
 }
@@ -647,14 +651,14 @@ static unsigned mounts_poll(struct file *file, poll_table *wait)
 {
        struct proc_mounts *p = file->private_data;
        struct mnt_namespace *ns = p->ns;
-       unsigned res = 0;
+       unsigned res = POLLIN | POLLRDNORM;
 
        poll_wait(file, &ns->poll, wait);
 
        spin_lock(&vfsmount_lock);
        if (p->event != ns->event) {
                p->event = ns->event;
-               res = POLLERR;
+               res |= POLLERR | POLLPRI;
        }
        spin_unlock(&vfsmount_lock);
 
@@ -1952,7 +1956,7 @@ static struct dentry *proc_pident_instantiate(struct inode *dir,
        const struct pid_entry *p = ptr;
        struct inode *inode;
        struct proc_inode *ei;
-       struct dentry *error = ERR_PTR(-EINVAL);
+       struct dentry *error = ERR_PTR(-ENOENT);
 
        inode = proc_pid_make_inode(dir->i_sb, task);
        if (!inode)
@@ -2124,9 +2128,15 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
        if (copy_from_user(page, buf, count))
                goto out_free;
 
+       /* Guard against adverse ptrace interaction */
+       length = mutex_lock_interruptible(&task->cred_guard_mutex);
+       if (length < 0)
+               goto out_free;
+
        length = security_setprocattr(task,
                                      (char*)file->f_path.dentry->d_name.name,
                                      (void*)page, count);
+       mutex_unlock(&task->cred_guard_mutex);
 out_free:
        free_page((unsigned long) page);
 out: