ipc/mqueue.c: only perform resource calculation if user valid

[android-x86/kernel.git] / ipc / mqueue.c

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index d5491a8..3f7dc5f 100644 (file)
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -369,7 +369,6 @@ static void mqueue_evict_inode(struct inode *inode)
 {
        struct mqueue_inode_info *info;
        struct user_struct *user;
-       unsigned long mq_bytes, mq_treesize;
        struct ipc_namespace *ipc_ns;
        struct msg_msg *msg, *nmsg;
        LIST_HEAD(tmp_msg);
@@ -392,16 +391,18 @@ static void mqueue_evict_inode(struct inode *inode)
                free_msg(msg);
        }
 
-       /* Total amount of bytes accounted for the mqueue */
-       mq_treesize = info->attr.mq_maxmsg * sizeof(struct msg_msg) +
-               min_t(unsigned int, info->attr.mq_maxmsg, MQ_PRIO_MAX) *
-               sizeof(struct posix_msg_tree_node);
-
-       mq_bytes = mq_treesize + (info->attr.mq_maxmsg *
-                                 info->attr.mq_msgsize);
-
        user = info->user;
        if (user) {
+               unsigned long mq_bytes, mq_treesize;
+
+               /* Total amount of bytes accounted for the mqueue */
+               mq_treesize = info->attr.mq_maxmsg * sizeof(struct msg_msg) +
+                       min_t(unsigned int, info->attr.mq_maxmsg, MQ_PRIO_MAX) *
+                       sizeof(struct posix_msg_tree_node);
+
+               mq_bytes = mq_treesize + (info->attr.mq_maxmsg *
+                                         info->attr.mq_msgsize);
+
                spin_lock(&mq_lock);
                user->mq_bytes -= mq_bytes;
                /*