From: Ruchi Kandoi <kandoiruchi@google.com>
Date: Sat, 24 Oct 2015 00:49:11 +0000 (-0700)
Subject: uid_cputime: Check for the range while removing range of UIDs.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fc20e7a1c7266258b1c5fd5d66a4a2156f099fb0;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

uid_cputime: Check for the range while removing range of UIDs.

Checking if the uid_entry->uid matches the uid intended to be removed will
prevent deleting unwanted uid_entry.
Type cast the key for the hashtable to the same size, as when they were
inserted. This will make sure that we can find the uid_entry we want.

Bug: 25195548
Change-Id: I567942123cfb20e4b61ad624da19ec4cc84642c1
Signed-off: Ruchi kandoi <kandoiruchi@google.com>
---

diff --git a/drivers/misc/uid_cputime.c b/drivers/misc/uid_cputime.c
index a8bd0916f54..0068c2066cc 100644
--- a/drivers/misc/uid_cputime.c
+++ b/drivers/misc/uid_cputime.c
@@ -170,14 +170,15 @@ static ssize_t uid_remove_write(struct file *file,
 		kstrtol(end_uid, 10, &uid_end) != 0) {
 		return -EINVAL;
 	}
-
 	mutex_lock(&uid_lock);
 
 	for (; uid_start <= uid_end; uid_start++) {
 		hash_for_each_possible_safe(hash_table, uid_entry, tmp,
-							hash, uid_start) {
-			hash_del(&uid_entry->hash);
-			kfree(uid_entry);
+							hash, (uid_t)uid_start) {
+			if (uid_start == uid_entry->uid) {
+				hash_del(&uid_entry->hash);
+				kfree(uid_entry);
+			}
 		}
 	}