diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 464ca3f01fe7..dde1c2ea1c84 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -2644,6 +2644,12 @@ union bpf_attr {
  *		  Use with BPF_F_ADJ_ROOM_ENCAP_L2 flag to further specify the
  *		  L2 type as Ethernet.
  *
+ *              * **BPF_F_ADJ_ROOM_DECAP_L3_IPV4**,
+ *                **BPF_F_ADJ_ROOM_DECAP_L3_IPV6**:
+ *                Indicate the new IP header version after decapsulating the
+ *                outer IP header. Mainly used in scenarios that the inner and
+ *                outer IP versions are different.
+ *
  * 		A call to this helper is susceptible to change the underlying
  * 		packet buffer. Therefore, at load time, all checks on pointers
  * 		previously done by the verifier are invalidated and must be
@@ -5803,6 +5809,8 @@ enum {
 	BPF_F_ADJ_ROOM_ENCAP_L4_UDP	= (1ULL << 4),
 	BPF_F_ADJ_ROOM_NO_CSUM_RESET	= (1ULL << 5),
 	BPF_F_ADJ_ROOM_ENCAP_L2_ETH	= (1ULL << 6),
+	BPF_F_ADJ_ROOM_DECAP_L3_IPV4	= (1ULL << 7),
+	BPF_F_ADJ_ROOM_DECAP_L3_IPV6	= (1ULL << 8),
 };
 
 enum {
diff --git a/net/core/filter.c b/net/core/filter.c
index 43cc1fe58a2c..5fb113953f80 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -3381,13 +3381,17 @@ static u32 bpf_skb_net_base_len(const struct sk_buff *skb)
 #define BPF_F_ADJ_ROOM_ENCAP_L3_MASK	(BPF_F_ADJ_ROOM_ENCAP_L3_IPV4 | \
 					 BPF_F_ADJ_ROOM_ENCAP_L3_IPV6)
 
+#define BPF_F_ADJ_ROOM_DECAP_L3_MASK	(BPF_F_ADJ_ROOM_DECAP_L3_IPV4 | \
+					 BPF_F_ADJ_ROOM_DECAP_L3_IPV6)
+
 #define BPF_F_ADJ_ROOM_MASK		(BPF_F_ADJ_ROOM_FIXED_GSO | \
 					 BPF_F_ADJ_ROOM_ENCAP_L3_MASK | \
 					 BPF_F_ADJ_ROOM_ENCAP_L4_GRE | \
 					 BPF_F_ADJ_ROOM_ENCAP_L4_UDP | \
 					 BPF_F_ADJ_ROOM_ENCAP_L2_ETH | \
 					 BPF_F_ADJ_ROOM_ENCAP_L2( \
-					  BPF_ADJ_ROOM_ENCAP_L2_MASK))
+					  BPF_ADJ_ROOM_ENCAP_L2_MASK) | \
+					 BPF_F_ADJ_ROOM_DECAP_L3_MASK)
 
 static int bpf_skb_net_grow(struct sk_buff *skb, u32 off, u32 len_diff,
 			    u64 flags)
@@ -3501,6 +3505,7 @@ static int bpf_skb_net_shrink(struct sk_buff *skb, u32 off, u32 len_diff,
 	int ret;
 
 	if (unlikely(flags & ~(BPF_F_ADJ_ROOM_FIXED_GSO |
+			       BPF_F_ADJ_ROOM_DECAP_L3_MASK |
 			       BPF_F_ADJ_ROOM_NO_CSUM_RESET)))
 		return -EINVAL;
 
@@ -3519,6 +3524,14 @@ static int bpf_skb_net_shrink(struct sk_buff *skb, u32 off, u32 len_diff,
 	if (unlikely(ret < 0))
 		return ret;
 
+	/* Match skb->protocol to new outer l3 protocol */
+	if (skb->protocol == htons(ETH_P_IP) &&
+	    flags & BPF_F_ADJ_ROOM_DECAP_L3_IPV6)
+		skb->protocol = htons(ETH_P_IPV6);
+	else if (skb->protocol == htons(ETH_P_IPV6) &&
+		 flags & BPF_F_ADJ_ROOM_DECAP_L3_IPV4)
+		skb->protocol = htons(ETH_P_IP);
+
 	if (skb_is_gso(skb)) {
 		struct skb_shared_info *shinfo = skb_shinfo(skb);
 
@@ -3596,6 +3609,10 @@ BPF_CALL_4(bpf_skb_adjust_room, struct sk_buff *, skb, s32, len_diff,
 	if (unlikely(proto != htons(ETH_P_IP) &&
 		     proto != htons(ETH_P_IPV6)))
 		return -ENOTSUPP;
+	if (unlikely((shrink && ((flags & BPF_F_ADJ_ROOM_DECAP_L3_MASK) ==
+		      BPF_F_ADJ_ROOM_DECAP_L3_MASK)) || (!shrink &&
+		      flags & BPF_F_ADJ_ROOM_DECAP_L3_MASK)))
+		return -EINVAL;
 
 	off = skb_mac_header_len(skb);
 	switch (mode) {
@@ -3608,6 +3625,13 @@ BPF_CALL_4(bpf_skb_adjust_room, struct sk_buff *, skb, s32, len_diff,
 		return -ENOTSUPP;
 	}
 
+	if (shrink) {
+		if (flags & BPF_F_ADJ_ROOM_DECAP_L3_IPV6)
+			len_min = sizeof(struct ipv6hdr);
+		else if (flags & BPF_F_ADJ_ROOM_DECAP_L3_IPV4)
+			len_min = sizeof(struct iphdr);
+	}
+
 	len_cur = skb->len - skb_network_offset(skb);
 	if ((shrink && (len_diff_abs >= len_cur ||
 			len_cur - len_diff_abs < len_min)) ||
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 464ca3f01fe7..22672e5c8466 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2644,6 +2644,12 @@ union bpf_attr {
  *		  Use with BPF_F_ADJ_ROOM_ENCAP_L2 flag to further specify the
  *		  L2 type as Ethernet.
  *
+ *              * **BPF_F_ADJ_ROOM_DECAP_L3_IPV4**,
+ *                **BPF_F_ADJ_ROOM_DECAP_L3_IPV6**:
+ *                Indicate the new IP header version after decapsulating the
+ *                outer IP header. Mainly used in scenarios that the inner and
+ *                outer IP versions are different.
+ *
  * 		A call to this helper is susceptible to change the underlying
  * 		packet buffer. Therefore, at load time, all checks on pointers
  * 		previously done by the verifier are invalidated and must be
@@ -5803,6 +5809,8 @@ enum {
 	BPF_F_ADJ_ROOM_ENCAP_L4_UDP	= (1ULL << 4),
 	BPF_F_ADJ_ROOM_NO_CSUM_RESET	= (1ULL << 5),
 	BPF_F_ADJ_ROOM_ENCAP_L2_ETH	= (1ULL << 6),
+	BPF_F_ADJ_ROOM_DECAP_L3_IPV4    = (1ULL << 7),
+	BPF_F_ADJ_ROOM_DECAP_L3_IPV6    = (1ULL << 8),
 };
 
 enum {
