wprobe: fix some endianness fail in the l2 filter code

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16732 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/wprobe/src/kernel/wprobe-core.c b/package/wprobe/src/kernel/wprobe-core.c
index d8f5a16..f9dd282 100644 (file)
--- a/package/wprobe/src/kernel/wprobe-core.c
+++ b/package/wprobe/src/kernel/wprobe-core.c
@@ -844,6 +844,7 @@ wprobe_check_filter(void *data, int datalen, int gs)
 
                hdr->name[31] = 0;
                cur_is = be32_to_cpu(hdr->n_items);
+               hdr->n_items = cur_is;
                is += cur_is;
                for (j = 0; j < cur_is; j++) {
                        struct sock_filter *sf;
@@ -854,11 +855,13 @@ wprobe_check_filter(void *data, int datalen, int gs)
                        if (data > end)
                                goto overrun;
 
-                       if (hdr->n_items > 1024)
+                       hdr->name[31] = 0;
+                       n_items = be32_to_cpu(hdr->n_items);
+                       hdr->n_items = n_items;
+
+                       if (n_items > 1024)
                                goto overrun;
 
-                       hdr->name[31] = 0;
-                       hdr->n_items = n_items = be32_to_cpu(hdr->n_items);
                        sf = data;
                        if (n_items > 0) {
                                for (k = 0; k < n_items; k++) {
@@ -968,7 +971,7 @@ wprobe_set_filter(struct wprobe_iface *dev, void *data, int len)
                for (j = 0; j < g->n_items; j++) {
                        hdr = data;
                        f->items[cur_is++] = data;
-                       data += sizeof(*hdr) + be32_to_cpu(hdr->n_items) * sizeof(struct sock_filter);
+                       data += sizeof(*hdr) + hdr->n_items * sizeof(struct sock_filter);
                }
        }
        rcu_assign_pointer(dev->active_filter, f);