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Diffstat (limited to 'fs/proc/base.c')
-rw-r--r--fs/proc/base.c44
1 files changed, 42 insertions, 2 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 5eb02069e1b8..86ea28bcec5a 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -133,6 +133,12 @@ struct pid_entry {
NULL, &proc_single_file_operations, \
{ .proc_show = show } )
+/* ANDROID is for special files in /proc. */
+#define ANDROID(NAME, MODE, OTYPE) \
+ NOD(NAME, (S_IFREG|(MODE)), \
+ &proc_##OTYPE##_inode_operations, \
+ &proc_##OTYPE##_operations, {})
+
/*
* Count the number of hardlinks for the pid_entry table, excluding the .
* and .. links.
@@ -263,7 +269,8 @@ struct mm_struct *mm_for_maps(struct task_struct *task)
mm = get_task_mm(task);
if (mm && mm != current->mm &&
- !ptrace_may_access(task, PTRACE_MODE_READ)) {
+ !ptrace_may_access(task, PTRACE_MODE_READ) &&
+ !capable(CAP_SYS_RESOURCE)) {
mmput(mm);
mm = ERR_PTR(-EACCES);
}
@@ -1140,6 +1147,39 @@ out:
return err < 0 ? err : count;
}
+static int oom_adjust_permission(struct inode *inode, int mask,
+ unsigned int flags)
+{
+ uid_t uid;
+ struct task_struct *p;
+
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
+
+ p = get_proc_task(inode);
+ if(p) {
+ uid = task_uid(p);
+ put_task_struct(p);
+ }
+
+ /*
+ * System Server (uid == 1000) is granted access to oom_adj of all
+ * android applications (uid > 10000) as and services (uid >= 1000)
+ */
+ if (p && (current_fsuid() == 1000) && (uid >= 1000)) {
+ if (inode->i_mode >> 6 & mask) {
+ return 0;
+ }
+ }
+
+ /* Fall back to default. */
+ return generic_permission(inode, mask, flags, NULL);
+}
+
+static const struct inode_operations proc_oom_adjust_inode_operations = {
+ .permission = oom_adjust_permission,
+};
+
static const struct file_operations proc_oom_adjust_operations = {
.read = oom_adjust_read,
.write = oom_adjust_write,
@@ -2846,7 +2886,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
INF("oom_score", S_IRUGO, proc_oom_score),
- REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adjust_operations),
+ ANDROID("oom_adj",S_IRUGO|S_IWUSR, oom_adjust),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),