diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 1019f14583c9..39f1d16f3628 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -827,6 +827,8 @@ enum skb_tstamp_type {
  *	@csum_level: indicates the number of consecutive checksums found in
  *		the packet minus one that have been verified as
  *		CHECKSUM_UNNECESSARY (max 3)
+ *	@unreadable: indicates that at least 1 of the fragments in this skb is
+ *		unreadable.
  *	@dst_pending_confirm: need to confirm neighbour
  *	@decrypted: Decrypted SKB
  *	@slow_gro: state present at GRO time, slower prepare step required
@@ -1008,7 +1010,7 @@ struct sk_buff {
 #if IS_ENABLED(CONFIG_IP_SCTP)
 	__u8			csum_not_inet:1;
 #endif
-
+	__u8			unreadable:1;
 #if defined(CONFIG_NET_SCHED) || defined(CONFIG_NET_XGRESS)
 	__u16			tc_index;	/* traffic control index */
 #endif
@@ -1824,6 +1826,12 @@ static inline void skb_zcopy_downgrade_managed(struct sk_buff *skb)
 		__skb_zcopy_downgrade_managed(skb);
 }
 
+/* Return true if frags in this skb are readable by the host. */
+static inline bool skb_frags_readable(const struct sk_buff *skb)
+{
+	return !skb->unreadable;
+}
+
 static inline void skb_mark_not_on_list(struct sk_buff *skb)
 {
 	skb->next = NULL;
@@ -2540,10 +2548,17 @@ static inline void skb_len_add(struct sk_buff *skb, int delta)
 static inline void __skb_fill_netmem_desc(struct sk_buff *skb, int i,
 					  netmem_ref netmem, int off, int size)
 {
-	struct page *page = netmem_to_page(netmem);
+	struct page *page;
 
 	__skb_fill_netmem_desc_noacc(skb_shinfo(skb), i, netmem, off, size);
 
+	if (netmem_is_net_iov(netmem)) {
+		skb->unreadable = true;
+		return;
+	}
+
+	page = netmem_to_page(netmem);
+
 	/* Propagate page pfmemalloc to the skb if we can. The problem is
 	 * that not all callers have unique ownership of the page but rely
 	 * on page_is_pfmemalloc doing the right thing(tm).
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 2aac11e7e1cc..f77f812bfbe7 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1069,7 +1069,8 @@ static inline bool tcp_skb_can_collapse(const struct sk_buff *to,
 	/* skb_cmp_decrypted() not needed, use tcp_write_collapse_fence() */
 	return likely(tcp_skb_can_collapse_to(to) &&
 		      mptcp_skb_can_collapse(to, from) &&
-		      skb_pure_zcopy_same(to, from));
+		      skb_pure_zcopy_same(to, from) &&
+		      skb_frags_readable(to) == skb_frags_readable(from));
 }
 
 static inline bool tcp_skb_can_collapse_rx(const struct sk_buff *to,
diff --git a/net/core/datagram.c b/net/core/datagram.c
index a40f733b37d7..f0693707aece 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -407,6 +407,9 @@ static int __skb_datagram_iter(const struct sk_buff *skb, int offset,
 			return 0;
 	}
 
+	if (!skb_frags_readable(skb))
+		goto short_copy;
+
 	/* Copy paged appendix. Hmm... why does this look so complicated? */
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 		int end;
@@ -623,6 +626,9 @@ int zerocopy_fill_skb_from_iter(struct sk_buff *skb,
 {
 	int frag = skb_shinfo(skb)->nr_frags;
 
+	if (!skb_frags_readable(skb))
+		return -EFAULT;
+
 	while (length && iov_iter_count(from)) {
 		struct page *head, *last_head = NULL;
 		struct page *pages[MAX_SKB_FRAGS];
diff --git a/net/core/dev.c b/net/core/dev.c
index 517b934bdf9c..1e740faf9e78 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3312,6 +3312,10 @@ int skb_checksum_help(struct sk_buff *skb)
 		return -EINVAL;
 	}
 
+	if (!skb_frags_readable(skb)) {
+		return -EFAULT;
+	}
+
 	/* Before computing a checksum, we should make sure no frag could
 	 * be modified by an external entity : checksum could be wrong.
 	 */
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 671c456b93f5..74149dc4ee31 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1972,6 +1972,9 @@ int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask)
 	if (skb_shared(skb) || skb_unclone(skb, gfp_mask))
 		return -EINVAL;
 
+	if (!skb_frags_readable(skb))
+		return -EFAULT;
+
 	if (!num_frags)
 		goto release;
 
@@ -2145,6 +2148,9 @@ struct sk_buff *skb_copy(const struct sk_buff *skb, gfp_t gfp_mask)
 	unsigned int size;
 	int headerlen;
 
+	if (!skb_frags_readable(skb))
+		return NULL;
+
 	if (WARN_ON_ONCE(skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST))
 		return NULL;
 
@@ -2483,6 +2489,9 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
 	struct sk_buff *n;
 	int oldheadroom;
 
+	if (!skb_frags_readable(skb))
+		return NULL;
+
 	if (WARN_ON_ONCE(skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST))
 		return NULL;
 
@@ -2827,6 +2836,9 @@ void *__pskb_pull_tail(struct sk_buff *skb, int delta)
 	 */
 	int i, k, eat = (skb->tail + delta) - skb->end;
 
+	if (!skb_frags_readable(skb))
+		return NULL;
+
 	if (eat > 0 || skb_cloned(skb)) {
 		if (pskb_expand_head(skb, 0, eat > 0 ? eat + 128 : 0,
 				     GFP_ATOMIC))
@@ -2980,6 +2992,9 @@ int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
 		to     += copy;
 	}
 
+	if (!skb_frags_readable(skb))
+		goto fault;
+
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 		int end;
 		skb_frag_t *f = &skb_shinfo(skb)->frags[i];
@@ -3168,6 +3183,9 @@ static bool __skb_splice_bits(struct sk_buff *skb, struct pipe_inode_info *pipe,
 	/*
 	 * then map the fragments
 	 */
+	if (!skb_frags_readable(skb))
+		return false;
+
 	for (seg = 0; seg < skb_shinfo(skb)->nr_frags; seg++) {
 		const skb_frag_t *f = &skb_shinfo(skb)->frags[seg];
 
@@ -3391,6 +3409,9 @@ int skb_store_bits(struct sk_buff *skb, int offset, const void *from, int len)
 		from += copy;
 	}
 
+	if (!skb_frags_readable(skb))
+		goto fault;
+
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 		int end;
@@ -3470,6 +3491,9 @@ __wsum __skb_checksum(const struct sk_buff *skb, int offset, int len,
 		pos	= copy;
 	}
 
+	if (WARN_ON_ONCE(!skb_frags_readable(skb)))
+		return 0;
+
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 		int end;
 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
@@ -3570,6 +3594,9 @@ __wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
 		pos	= copy;
 	}
 
+	if (!skb_frags_readable(skb))
+		return 0;
+
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 		int end;
 
@@ -4061,6 +4088,7 @@ static inline void skb_split_inside_header(struct sk_buff *skb,
 		skb_shinfo(skb1)->frags[i] = skb_shinfo(skb)->frags[i];
 
 	skb_shinfo(skb1)->nr_frags = skb_shinfo(skb)->nr_frags;
+	skb1->unreadable	   = skb->unreadable;
 	skb_shinfo(skb)->nr_frags  = 0;
 	skb1->data_len		   = skb->data_len;
 	skb1->len		   += skb1->data_len;
@@ -4108,6 +4136,8 @@ static inline void skb_split_no_header(struct sk_buff *skb,
 		pos += size;
 	}
 	skb_shinfo(skb1)->nr_frags = k;
+
+	skb1->unreadable = skb->unreadable;
 }
 
 /**
@@ -4345,6 +4375,9 @@ next_skb:
 		return block_limit - abs_offset;
 	}
 
+	if (!skb_frags_readable(st->cur_skb))
+		return 0;
+
 	if (st->frag_idx == 0 && !st->frag_data)
 		st->stepped_offset += skb_headlen(st->cur_skb);
 
@@ -5992,7 +6025,10 @@ bool skb_try_coalesce(struct sk_buff *to, struct sk_buff *from,
 	if (to->pp_recycle != from->pp_recycle)
 		return false;
 
-	if (len <= skb_tailroom(to)) {
+	if (skb_frags_readable(from) != skb_frags_readable(to))
+		return false;
+
+	if (len <= skb_tailroom(to) && skb_frags_readable(from)) {
 		if (len)
 			BUG_ON(skb_copy_bits(from, 0, skb_put(to, len), len));
 		*delta_truesize = 0;
@@ -6169,6 +6205,9 @@ int skb_ensure_writable(struct sk_buff *skb, unsigned int write_len)
 	if (!pskb_may_pull(skb, write_len))
 		return -ENOMEM;
 
+	if (!skb_frags_readable(skb))
+		return -EFAULT;
+
 	if (!skb_cloned(skb) || skb_clone_writable(skb, write_len))
 		return 0;
 
@@ -6848,7 +6887,7 @@ void skb_condense(struct sk_buff *skb)
 {
 	if (skb->data_len) {
 		if (skb->data_len > skb->end - skb->tail ||
-		    skb_cloned(skb))
+		    skb_cloned(skb) || !skb_frags_readable(skb))
 			return;
 
 		/* Nice, we can free page frag(s) right now */
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 06dcf89e2cca..a2fac029a84a 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2160,6 +2160,9 @@ static int tcp_zerocopy_receive(struct sock *sk,
 				skb = tcp_recv_skb(sk, seq, &offset);
 			}
 
+			if (!skb_frags_readable(skb))
+				break;
+
 			if (TCP_SKB_CB(skb)->has_rxtstamp) {
 				tcp_update_recv_tstamps(skb, tss);
 				zc->msg_flags |= TCP_CMSG_TS;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index e37488d3453f..9f314dfa1490 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -5391,6 +5391,9 @@ restart:
 	for (end_of_skbs = true; skb != NULL && skb != tail; skb = n) {
 		n = tcp_skb_next(skb, list);
 
+		if (!skb_frags_readable(skb))
+			goto skip_this;
+
 		/* No new bits? It is possible on ofo queue. */
 		if (!before(start, TCP_SKB_CB(skb)->end_seq)) {
 			skb = tcp_collapse_one(sk, skb, list, root);
@@ -5411,17 +5414,20 @@ restart:
 			break;
 		}
 
-		if (n && n != tail && tcp_skb_can_collapse_rx(skb, n) &&
+		if (n && n != tail && skb_frags_readable(n) &&
+		    tcp_skb_can_collapse_rx(skb, n) &&
 		    TCP_SKB_CB(skb)->end_seq != TCP_SKB_CB(n)->seq) {
 			end_of_skbs = false;
 			break;
 		}
 
+skip_this:
 		/* Decided to skip this, advance start seq. */
 		start = TCP_SKB_CB(skb)->end_seq;
 	}
 	if (end_of_skbs ||
-	    (TCP_SKB_CB(skb)->tcp_flags & (TCPHDR_SYN | TCPHDR_FIN)))
+	    (TCP_SKB_CB(skb)->tcp_flags & (TCPHDR_SYN | TCPHDR_FIN)) ||
+	    !skb_frags_readable(skb))
 		return;
 
 	__skb_queue_head_init(&tmp);
@@ -5463,7 +5469,8 @@ restart:
 				if (!skb ||
 				    skb == tail ||
 				    !tcp_skb_can_collapse_rx(nskb, skb) ||
-				    (TCP_SKB_CB(skb)->tcp_flags & (TCPHDR_SYN | TCPHDR_FIN)))
+				    (TCP_SKB_CB(skb)->tcp_flags & (TCPHDR_SYN | TCPHDR_FIN)) ||
+				    !skb_frags_readable(skb))
 					goto end;
 			}
 		}
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index cdd0def14427..4fd746bd4d54 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2344,7 +2344,8 @@ static bool tcp_can_coalesce_send_queue_head(struct sock *sk, int len)
 
 		if (unlikely(TCP_SKB_CB(skb)->eor) ||
 		    tcp_has_tx_tstamp(skb) ||
-		    !skb_pure_zcopy_same(skb, next))
+		    !skb_pure_zcopy_same(skb, next) ||
+		    skb_frags_readable(skb) != skb_frags_readable(next))
 			return false;
 
 		len -= skb->len;
@@ -3264,6 +3265,8 @@ static bool tcp_can_collapse(const struct sock *sk, const struct sk_buff *skb)
 		return false;
 	if (skb_cloned(skb))
 		return false;
+	if (!skb_frags_readable(skb))
+		return false;
 	/* Some heuristics for collapsing over SACK'd could be invented */
 	if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)
 		return false;
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 4a364cdd445e..a705ec214254 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2216,7 +2216,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev,
 		}
 	}
 
-	snaplen = skb->len;
+	snaplen = skb_frags_readable(skb) ? skb->len : skb_headlen(skb);
 
 	res = run_filter(skb, sk, snaplen);
 	if (!res)
@@ -2336,7 +2336,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
 		}
 	}
 
-	snaplen = skb->len;
+	snaplen = skb_frags_readable(skb) ? skb->len : skb_headlen(skb);
 
 	res = run_filter(skb, sk, snaplen);
 	if (!res)