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-rw-r--r--net/ipv4/tcp.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 90e24c3f6..86e7695d9 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1934,7 +1934,17 @@ static skb_frag_t *skb_advance_to_frag(struct sk_buff *skb, u32 offset_skb,
static bool can_map_frag(const skb_frag_t *frag)
{
- return skb_frag_size(frag) == PAGE_SIZE && !skb_frag_off(frag);
+ struct page *page;
+
+ if (skb_frag_size(frag) != PAGE_SIZE || skb_frag_off(frag))
+ return false;
+
+ page = skb_frag_page(frag);
+
+ if (PageCompound(page) || page->mapping)
+ return false;
+
+ return true;
}
static int find_next_mappable_frag(const skb_frag_t *frag,