diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 5b3559cb1d82794c0fffcb3f6ec5b26fc523208f..09f56bfa2771e8a6785c12841fa6a8b74e5e04df 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1212,6 +1212,10 @@ struct ubuf_info *msg_zerocopy_realloc(struct sock *sk, size_t size, const u32 byte_limit = 1 << 19; /* limit to a few TSO */ u32 bytelen, next; + /* there might be non MSG_ZEROCOPY users */ + if (uarg->callback != msg_zerocopy_callback) + return NULL; + /* realloc only when socket is locked (TCP, UDP cork), * so uarg->len and sk_zckey access is serialized */