Re: Linux 5.10.257

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

diff --git a/Makefile b/Makefile
index d8f781615d3e..d3d82c21152f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 5
 PATCHLEVEL = 10
-SUBLEVEL = 256
+SUBLEVEL = 257
 EXTRAVERSION =
 NAME = Dare mighty things
 
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 297a2efd6322..f7100f5af37c 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1596,6 +1596,7 @@ struct sk_buff *__pskb_copy_fclone(struct sk_buff *skb, int headroom,
 			skb_frag_ref(skb, i);
 		}
 		skb_shinfo(n)->nr_frags = i;
+		skb_shinfo(n)->tx_flags |= skb_shinfo(skb)->tx_flags & SKBTX_SHARED_FRAG;
 	}
 
 	if (skb_has_frag_list(skb)) {
@@ -3502,6 +3503,8 @@ int skb_shift(struct sk_buff *tgt, struct sk_buff *skb, int shiftlen)
 	tgt->ip_summed = CHECKSUM_PARTIAL;
 	skb->ip_summed = CHECKSUM_PARTIAL;
 
+	skb_shinfo(tgt)->tx_flags |= skb_shinfo(skb)->tx_flags & SKBTX_SHARED_FRAG;
+
 	/* Yak, is it really working this way? Some helper please? */
 	skb->len -= shiftlen;
 	skb->data_len -= shiftlen;
@@ -3843,6 +3846,8 @@ int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb)
 	p->truesize += skb->truesize;
 	p->len += skb->len;
 
+	skb_shinfo(p)->tx_flags |= skb_shinfo(skb)->tx_flags & SKBTX_SHARED_FRAG;
+
 	NAPI_GRO_CB(skb)->same_flow = 1;
 
 	return 0;
@@ -4076,7 +4081,8 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
 		skb_copy_from_linear_data_offset(head_skb, offset,
 						 skb_put(nskb, hsize), hsize);
 
-		skb_shinfo(nskb)->tx_flags |= skb_shinfo(head_skb)->tx_flags &
+		skb_shinfo(nskb)->tx_flags |= (skb_shinfo(head_skb)->tx_flags |
+					       skb_shinfo(frag_skb)->tx_flags) &
 					      SKBTX_SHARED_FRAG;
 
 		if (skb_zerocopy_clone(nskb, frag_skb, GFP_ATOMIC))
@@ -4093,6 +4099,9 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
 				nfrags = skb_shinfo(list_skb)->nr_frags;
 				frag = skb_shinfo(list_skb)->frags;
 				frag_skb = list_skb;
+
+				skb_shinfo(nskb)->tx_flags |= skb_shinfo(frag_skb)->tx_flags & SKBTX_SHARED_FRAG;
+
 				if (!skb_headlen(list_skb)) {
 					BUG_ON(!nfrags);
 				} else {
@@ -4309,10 +4318,12 @@ int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb)
 	p->data_len += len;
 	p->truesize += delta_truesize;
 	p->len += len;
+	skb_shinfo(p)->tx_flags |= skbinfo->tx_flags & SKBTX_SHARED_FRAG;
 	if (lp != p) {
 		lp->data_len += len;
 		lp->truesize += delta_truesize;
 		lp->len += len;
+		skb_shinfo(lp)->tx_flags |= skbinfo->tx_flags & SKBTX_SHARED_FRAG;
 	}
 	NAPI_GRO_CB(skb)->same_flow = 1;
 	return 0;
@@ -5315,6 +5326,8 @@ bool skb_try_coalesce(struct sk_buff *to, struct sk_buff *from,
 	       from_shinfo->frags,
 	       from_shinfo->nr_frags * sizeof(skb_frag_t));
 	to_shinfo->nr_frags += from_shinfo->nr_frags;
+	if (from_shinfo->nr_frags)
+		to_shinfo->tx_flags |= from_shinfo->tx_flags & SKBTX_SHARED_FRAG;
 
 	if (!skb_cloned(from))
 		from_shinfo->nr_frags = 0;