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-rw-r--r--net/socket.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/socket.c b/net/socket.c
index 82262e1922f9..6e6cccc2104f 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -3640,9 +3640,11 @@ EXPORT_SYMBOL(kernel_getpeername);
int kernel_sendpage(struct socket *sock, struct page *page, int offset,
size_t size, int flags)
{
- if (sock->ops->sendpage)
+ if (sock->ops->sendpage) {
+ /* Warn in case the improper page to zero-copy send */
+ WARN_ONCE(!sendpage_ok(page), "improper page for zero-copy send");
return sock->ops->sendpage(sock, page, offset, size, flags);
-
+ }
return sock_no_sendpage(sock, page, offset, size, flags);
}
EXPORT_SYMBOL(kernel_sendpage);