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authorAlexey Dobriyan <adobriyan@gmail.com>2008-10-10 03:27:16 +0400
committerAlexey Dobriyan <adobriyan@gmail.com>2008-10-10 04:24:51 +0400
commit3bbfe0596746e1590888a6e1e6a07583265238b7 (patch)
tree057d3d2aa8cb68eff8c944378e86ba120eff9cf4 /fs
parent45acb8db06bad529f0feaf89465ce33152640089 (diff)
downloadop-kernel-dev-3bbfe0596746e1590888a6e1e6a07583265238b7.zip
op-kernel-dev-3bbfe0596746e1590888a6e1e6a07583265238b7.tar.gz
proc: remove kernel.maps_protect
After commit 831830b5a2b5d413407adf380ef62fe17d6fcbf2 aka "restrict reading from /proc/<pid>/maps to those who share ->mm or can ptrace" sysctl stopped being relevant because commit moved security checks from ->show time to ->start time (mm_for_maps()). Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Kees Cook <kees.cook@canonical.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/base.c3
-rw-r--r--fs/proc/internal.h2
-rw-r--r--fs/proc/task_mmu.c16
-rw-r--r--fs/proc/task_nommu.c5
4 files changed, 1 insertions, 25 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index c1332dd..b5918ae 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -148,9 +148,6 @@ static unsigned int pid_entry_count_dirs(const struct pid_entry *entries,
return count;
}
-int maps_protect;
-EXPORT_SYMBOL(maps_protect);
-
static struct fs_struct *get_fs_struct(struct task_struct *task)
{
struct fs_struct *fs;
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 4422023..3bfb7b8 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -45,8 +45,6 @@ do { \
extern int nommu_vma_show(struct seq_file *, struct vm_area_struct *);
#endif
-extern int maps_protect;
-
extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task);
extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 73d1891..4806830 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -210,9 +210,6 @@ static int show_map(struct seq_file *m, void *v)
dev_t dev = 0;
int len;
- if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
- return -EACCES;
-
if (file) {
struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
dev = inode->i_sb->s_dev;
@@ -742,22 +739,11 @@ const struct file_operations proc_pagemap_operations = {
#ifdef CONFIG_NUMA
extern int show_numa_map(struct seq_file *m, void *v);
-static int show_numa_map_checked(struct seq_file *m, void *v)
-{
- struct proc_maps_private *priv = m->private;
- struct task_struct *task = priv->task;
-
- if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
- return -EACCES;
-
- return show_numa_map(m, v);
-}
-
static const struct seq_operations proc_pid_numa_maps_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
- .show = show_numa_map_checked
+ .show = show_numa_map,
};
static int numa_maps_open(struct inode *inode, struct file *file)
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 5d84e71..219bd79e 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -110,11 +110,6 @@ int task_statm(struct mm_struct *mm, int *shared, int *text,
static int show_map(struct seq_file *m, void *_vml)
{
struct vm_list_struct *vml = _vml;
- struct proc_maps_private *priv = m->private;
- struct task_struct *task = priv->task;
-
- if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
- return -EACCES;
return nommu_vma_show(m, vml->vma);
}
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