diff options
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/array.c | 2 | ||||
| -rw-r--r-- | fs/proc/base.c | 31 | ||||
| -rw-r--r-- | fs/proc/proc_devtree.c | 7 |
3 files changed, 31 insertions, 9 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index 13b5d0708175..18e20feee251 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -270,7 +270,9 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p) blocked = p->blocked; collect_sigign_sigcatch(p, &ignored, &caught); num_threads = atomic_read(&p->signal->count); + rcu_read_lock(); /* FIXME: is this correct? */ qsize = atomic_read(&__task_cred(p)->user->sigpending); + rcu_read_unlock(); qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur; unlock_task_sighand(p, &flags); } diff --git a/fs/proc/base.c b/fs/proc/base.c index 18d5cc62d8ed..623e2ffb5d2b 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1095,8 +1095,12 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf, if (!capable(CAP_AUDIT_CONTROL)) return -EPERM; - if (current != pid_task(proc_pid(inode), PIDTYPE_PID)) + rcu_read_lock(); + if (current != pid_task(proc_pid(inode), PIDTYPE_PID)) { + rcu_read_unlock(); return -EPERM; + } + rcu_read_unlock(); if (count >= PAGE_SIZE) count = PAGE_SIZE - 1; @@ -1419,7 +1423,6 @@ static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd) goto out; error = PROC_I(inode)->op.proc_get_link(inode, &nd->path); - nd->last_type = LAST_BIND; out: return ERR_PTR(error); } @@ -2370,16 +2373,30 @@ static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd) { struct pid_namespace *ns = dentry->d_sb->s_fs_info; pid_t tgid = task_tgid_nr_ns(current, ns); - char tmp[PROC_NUMBUF]; - if (!tgid) - return ERR_PTR(-ENOENT); - sprintf(tmp, "%d", task_tgid_nr_ns(current, ns)); - return ERR_PTR(vfs_follow_link(nd,tmp)); + char *name = ERR_PTR(-ENOENT); + if (tgid) { + name = __getname(); + if (!name) + name = ERR_PTR(-ENOMEM); + else + sprintf(name, "%d", tgid); + } + nd_set_link(nd, name); + return NULL; +} + +static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd, + void *cookie) +{ + char *s = nd_get_link(nd); + if (!IS_ERR(s)) + __putname(s); } static const struct inode_operations proc_self_inode_operations = { .readlink = proc_self_readlink, .follow_link = proc_self_follow_link, + .put_link = proc_self_put_link, }; /* diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c index 123257bb356b..f8650dce74fb 100644 --- a/fs/proc/proc_devtree.c +++ b/fs/proc/proc_devtree.c @@ -10,16 +10,19 @@ #include <linux/seq_file.h> #include <linux/stat.h> #include <linux/string.h> +#include <linux/of.h> +#include <linux/module.h> #include <asm/prom.h> #include <asm/uaccess.h> #include "internal.h" -#ifndef HAVE_ARCH_DEVTREE_FIXUPS static inline void set_node_proc_entry(struct device_node *np, struct proc_dir_entry *de) { -} +#ifdef HAVE_ARCH_DEVTREE_FIXUPS + np->pde = de; #endif +} static struct proc_dir_entry *proc_device_tree; |