proc: make oom adjustment files user read-only

Make oom_adj and oom_score_adj user read-only.

Bug: 19636629
Change-Id: I055bb172d5b4d3d856e25918f3c5de8edf31e4a3
Signed-off-by: Rom Lemarchand <romlem@google.com>

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 4bd5d3118acd4b152d6e6f17b38b0a03b0f723d6..e2902398f680ac1dacf068d91ff977d0bcfba124 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2793,8 +2793,9 @@ static const struct pid_entry tgid_base_stuff[] = {
        ONE("cgroup",  S_IRUGO, proc_cgroup_show),
 #endif
        ONE("oom_score",  S_IRUGO, proc_oom_score),
-       REG("oom_adj",    S_IRUGO|S_IWUSR, proc_oom_adj_operations),
-       REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
+       INF("oom_score",  S_IRUGO, proc_oom_score),
+       REG("oom_adj",    S_IRUSR, proc_oom_adj_operations),
+       REG("oom_score_adj", S_IRUSR, proc_oom_score_adj_operations),
 #ifdef CONFIG_AUDITSYSCALL
        REG("loginuid",   S_IWUSR|S_IRUGO, proc_loginuid_operations),
        REG("sessionid",  S_IRUGO, proc_sessionid_operations),
@@ -3141,8 +3142,8 @@ static const struct pid_entry tid_base_stuff[] = {
        ONE("cgroup",  S_IRUGO, proc_cgroup_show),
 #endif
        ONE("oom_score", S_IRUGO, proc_oom_score),
-       REG("oom_adj",   S_IRUGO|S_IWUSR, proc_oom_adj_operations),
-       REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
+       REG("oom_adj",   S_IRUSR, proc_oom_adj_operations),
+       REG("oom_score_adj", S_IRUSR, proc_oom_score_adj_operations),
 #ifdef CONFIG_AUDITSYSCALL
        REG("loginuid",  S_IWUSR|S_IRUGO, proc_loginuid_operations),
        REG("sessionid",  S_IRUGO, proc_sessionid_operations),