IMA: convert i_readcount to atomic
Convert the inode's i_readcount from an unsigned int to atomic.
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: Eric Paris <eparis@redhat.com>
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 203de97..6e8cb93 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -113,7 +113,7 @@
goto out;
if (mode & FMODE_WRITE) {
- if (inode->i_readcount && IS_IMA(inode))
+ if (atomic_read(&inode->i_readcount) && IS_IMA(inode))
send_tomtou = true;
goto out;
}
@@ -127,7 +127,7 @@
out:
/* remember the vfs deals with i_writecount */
if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
- inode->i_readcount++;
+ atomic_inc(&inode->i_readcount);
spin_unlock(&inode->i_lock);
@@ -149,15 +149,16 @@
assert_spin_locked(&inode->i_lock);
if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
- if (unlikely(inode->i_readcount == 0)) {
+ if (unlikely(atomic_read(&inode->i_readcount) == 0)) {
if (!ima_limit_imbalance(file)) {
printk(KERN_INFO "%s: open/free imbalance (r:%u)\n",
- __func__, inode->i_readcount);
+ __func__,
+ atomic_read(&inode->i_readcount));
dump_stack();
}
return;
}
- inode->i_readcount--;
+ atomic_dec(&inode->i_readcount);
}
}