diff --git a/include/linux/bpf-netns.h b/include/linux/bpf-netns.h
index 4052d649f36d..cb1d849c5d4f 100644
--- a/include/linux/bpf-netns.h
+++ b/include/linux/bpf-netns.h
@@ -8,6 +8,7 @@
 enum netns_bpf_attach_type {
 	NETNS_BPF_INVALID = -1,
 	NETNS_BPF_FLOW_DISSECTOR = 0,
+	NETNS_BPF_SK_LOOKUP,
 	MAX_NETNS_BPF_ATTACH_TYPE
 };
 
@@ -17,6 +18,8 @@ to_netns_bpf_attach_type(enum bpf_attach_type attach_type)
 	switch (attach_type) {
 	case BPF_FLOW_DISSECTOR:
 		return NETNS_BPF_FLOW_DISSECTOR;
+	case BPF_SK_LOOKUP:
+		return NETNS_BPF_SK_LOOKUP;
 	default:
 		return NETNS_BPF_INVALID;
 	}
diff --git a/include/linux/bpf_types.h b/include/linux/bpf_types.h
index a18ae82a298a..a52a5688418e 100644
--- a/include/linux/bpf_types.h
+++ b/include/linux/bpf_types.h
@@ -64,6 +64,8 @@ BPF_PROG_TYPE(BPF_PROG_TYPE_LIRC_MODE2, lirc_mode2,
 #ifdef CONFIG_INET
 BPF_PROG_TYPE(BPF_PROG_TYPE_SK_REUSEPORT, sk_reuseport,
 	      struct sk_reuseport_md, struct sk_reuseport_kern)
+BPF_PROG_TYPE(BPF_PROG_TYPE_SK_LOOKUP, sk_lookup,
+	      struct bpf_sk_lookup, struct bpf_sk_lookup_kern)
 #endif
 #if defined(CONFIG_BPF_JIT)
 BPF_PROG_TYPE(BPF_PROG_TYPE_STRUCT_OPS, bpf_struct_ops,
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 259377723603..ba4f8595fa54 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -1278,4 +1278,23 @@ struct bpf_sockopt_kern {
 	s32		retval;
 };
 
+struct bpf_sk_lookup_kern {
+	u16		family;
+	u16		protocol;
+	union {
+		struct {
+			__be32 saddr;
+			__be32 daddr;
+		} v4;
+		struct {
+			const struct in6_addr *saddr;
+			const struct in6_addr *daddr;
+		} v6;
+	};
+	__be16		sport;
+	u16		dport;
+	struct sock	*selected_sk;
+	bool		no_reuseport;
+};
+
 #endif /* __LINUX_FILTER_H__ */
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 0cb8ec948816..8dd6e6ce5de9 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -189,6 +189,7 @@ enum bpf_prog_type {
 	BPF_PROG_TYPE_STRUCT_OPS,
 	BPF_PROG_TYPE_EXT,
 	BPF_PROG_TYPE_LSM,
+	BPF_PROG_TYPE_SK_LOOKUP,
 };
 
 enum bpf_attach_type {
@@ -226,6 +227,7 @@ enum bpf_attach_type {
 	BPF_CGROUP_INET4_GETSOCKNAME,
 	BPF_CGROUP_INET6_GETSOCKNAME,
 	BPF_XDP_DEVMAP,
+	BPF_SK_LOOKUP,
 	__MAX_BPF_ATTACH_TYPE
 };
 
@@ -3067,6 +3069,10 @@ union bpf_attr {
  *
  * long bpf_sk_assign(struct sk_buff *skb, struct bpf_sock *sk, u64 flags)
  *	Description
+ *		Helper is overloaded depending on BPF program type. This
+ *		description applies to **BPF_PROG_TYPE_SCHED_CLS** and
+ *		**BPF_PROG_TYPE_SCHED_ACT** programs.
+ *
  *		Assign the *sk* to the *skb*. When combined with appropriate
  *		routing configuration to receive the packet towards the socket,
  *		will cause *skb* to be delivered to the specified socket.
@@ -3092,6 +3098,53 @@ union bpf_attr {
  *		**-ESOCKTNOSUPPORT** if the socket type is not supported
  *		(reuseport).
  *
+ * int bpf_sk_assign(struct bpf_sk_lookup *ctx, struct bpf_sock *sk, u64 flags)
+ *	Description
+ *		Helper is overloaded depending on BPF program type. This
+ *		description applies to **BPF_PROG_TYPE_SK_LOOKUP** programs.
+ *
+ *		Select the *sk* as a result of a socket lookup.
+ *
+ *		For the operation to succeed passed socket must be compatible
+ *		with the packet description provided by the *ctx* object.
+ *
+ *		L4 protocol (**IPPROTO_TCP** or **IPPROTO_UDP**) must
+ *		be an exact match. While IP family (**AF_INET** or
+ *		**AF_INET6**) must be compatible, that is IPv6 sockets
+ *		that are not v6-only can be selected for IPv4 packets.
+ *
+ *		Only TCP listeners and UDP unconnected sockets can be
+ *		selected.
+ *
+ *		*flags* argument can combination of following values:
+ *
+ *		* **BPF_SK_LOOKUP_F_REPLACE** to override the previous
+ *		  socket selection, potentially done by a BPF program
+ *		  that ran before us.
+ *
+ *		* **BPF_SK_LOOKUP_F_NO_REUSEPORT** to skip
+ *		  load-balancing within reuseport group for the socket
+ *		  being selected.
+ *
+ *	Return
+ *		0 on success, or a negative errno in case of failure.
+ *
+ *		* **-EAFNOSUPPORT** if socket family (*sk->family*) is
+ *		  not compatible with packet family (*ctx->family*).
+ *
+ *		* **-EEXIST** if socket has been already selected,
+ *		  potentially by another program, and
+ *		  **BPF_SK_LOOKUP_F_REPLACE** flag was not specified.
+ *
+ *		* **-EINVAL** if unsupported flags were specified.
+ *
+ *		* **-EPROTOTYPE** if socket L4 protocol
+ *		  (*sk->protocol*) doesn't match packet protocol
+ *		  (*ctx->protocol*).
+ *
+ *		* **-ESOCKTNOSUPPORT** if socket is not in allowed
+ *		  state (TCP listening or UDP unconnected).
+ *
  * u64 bpf_ktime_get_boot_ns(void)
  * 	Description
  * 		Return the time elapsed since system boot, in nanoseconds.
@@ -3569,6 +3622,12 @@ enum {
 	BPF_RINGBUF_HDR_SZ		= 8,
 };
 
+/* BPF_FUNC_sk_assign flags in bpf_sk_lookup context. */
+enum {
+	BPF_SK_LOOKUP_F_REPLACE		= (1ULL << 0),
+	BPF_SK_LOOKUP_F_NO_REUSEPORT	= (1ULL << 1),
+};
+
 /* Mode for BPF_FUNC_skb_adjust_room helper. */
 enum bpf_adj_room_mode {
 	BPF_ADJ_ROOM_NET,
@@ -4298,4 +4357,19 @@ struct bpf_pidns_info {
 	__u32 pid;
 	__u32 tgid;
 };
+
+/* User accessible data for SK_LOOKUP programs. Add new fields at the end. */
+struct bpf_sk_lookup {
+	__u32 family;		/* Protocol family (AF_INET, AF_INET6) */
+	__u32 protocol;		/* IP protocol (IPPROTO_TCP, IPPROTO_UDP) */
+	__u32 remote_ip4;	/* Network byte order */
+	__u32 remote_ip6[4];	/* Network byte order */
+	__u32 remote_port;	/* Network byte order */
+	__u32 local_ip4;	/* Network byte order */
+	__u32 local_ip6[4];	/* Network byte order */
+	__u32 local_port;	/* Host byte order */
+
+	__bpf_md_ptr(struct bpf_sock *, sk); /* Selected socket */
+};
+
 #endif /* _UAPI__LINUX_BPF_H__ */
diff --git a/kernel/bpf/net_namespace.c b/kernel/bpf/net_namespace.c
index 6011122c35b6..090166824ca4 100644
--- a/kernel/bpf/net_namespace.c
+++ b/kernel/bpf/net_namespace.c
@@ -360,6 +360,8 @@ static int netns_bpf_max_progs(enum netns_bpf_attach_type type)
 	switch (type) {
 	case NETNS_BPF_FLOW_DISSECTOR:
 		return 1;
+	case NETNS_BPF_SK_LOOKUP:
+		return 64;
 	default:
 		return 0;
 	}
@@ -391,6 +393,9 @@ static int netns_bpf_link_attach(struct net *net, struct bpf_link *link,
 	case NETNS_BPF_FLOW_DISSECTOR:
 		err = flow_dissector_bpf_prog_attach_check(net, link->prog);
 		break;
+	case NETNS_BPF_SK_LOOKUP:
+		err = 0; /* nothing to check */
+		break;
 	default:
 		err = -EINVAL;
 		break;
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 8da159936bab..e7d49959340e 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -2021,6 +2021,10 @@ bpf_prog_load_check_attach(enum bpf_prog_type prog_type,
 		default:
 			return -EINVAL;
 		}
+	case BPF_PROG_TYPE_SK_LOOKUP:
+		if (expected_attach_type == BPF_SK_LOOKUP)
+			return 0;
+		return -EINVAL;
 	case BPF_PROG_TYPE_EXT:
 		if (expected_attach_type)
 			return -EINVAL;
@@ -2755,6 +2759,7 @@ static int bpf_prog_attach_check_attach_type(const struct bpf_prog *prog,
 	case BPF_PROG_TYPE_CGROUP_SOCK:
 	case BPF_PROG_TYPE_CGROUP_SOCK_ADDR:
 	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
+	case BPF_PROG_TYPE_SK_LOOKUP:
 		return attach_type == prog->expected_attach_type ? 0 : -EINVAL;
 	case BPF_PROG_TYPE_CGROUP_SKB:
 		if (!capable(CAP_NET_ADMIN))
@@ -2815,6 +2820,8 @@ attach_type_to_prog_type(enum bpf_attach_type attach_type)
 		return BPF_PROG_TYPE_CGROUP_SOCKOPT;
 	case BPF_TRACE_ITER:
 		return BPF_PROG_TYPE_TRACING;
+	case BPF_SK_LOOKUP:
+		return BPF_PROG_TYPE_SK_LOOKUP;
 	default:
 		return BPF_PROG_TYPE_UNSPEC;
 	}
@@ -2952,6 +2959,7 @@ static int bpf_prog_query(const union bpf_attr *attr,
 	case BPF_LIRC_MODE2:
 		return lirc_prog_query(attr, uattr);
 	case BPF_FLOW_DISSECTOR:
+	case BPF_SK_LOOKUP:
 		return netns_bpf_prog_query(attr, uattr);
 	default:
 		return -EINVAL;
@@ -3885,6 +3893,7 @@ static int link_create(union bpf_attr *attr)
 		ret = tracing_bpf_link_attach(attr, prog);
 		break;
 	case BPF_PROG_TYPE_FLOW_DISSECTOR:
+	case BPF_PROG_TYPE_SK_LOOKUP:
 		ret = netns_bpf_link_create(attr, prog);
 		break;
 	default:
diff --git a/net/core/filter.c b/net/core/filter.c
index c796e141ea8e..286f90e0c824 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -9219,6 +9219,192 @@ const struct bpf_verifier_ops sk_reuseport_verifier_ops = {
 
 const struct bpf_prog_ops sk_reuseport_prog_ops = {
 };
+
+BPF_CALL_3(bpf_sk_lookup_assign, struct bpf_sk_lookup_kern *, ctx,
+	   struct sock *, sk, u64, flags)
+{
+	if (unlikely(flags & ~(BPF_SK_LOOKUP_F_REPLACE |
+			       BPF_SK_LOOKUP_F_NO_REUSEPORT)))
+		return -EINVAL;
+	if (unlikely(sk_is_refcounted(sk)))
+		return -ESOCKTNOSUPPORT; /* reject non-RCU freed sockets */
+	if (unlikely(sk->sk_state == TCP_ESTABLISHED))
+		return -ESOCKTNOSUPPORT; /* reject connected sockets */
+
+	/* Check if socket is suitable for packet L3/L4 protocol */
+	if (sk->sk_protocol != ctx->protocol)
+		return -EPROTOTYPE;
+	if (sk->sk_family != ctx->family &&
+	    (sk->sk_family == AF_INET || ipv6_only_sock(sk)))
+		return -EAFNOSUPPORT;
+
+	if (ctx->selected_sk && !(flags & BPF_SK_LOOKUP_F_REPLACE))
+		return -EEXIST;
+
+	/* Select socket as lookup result */
+	ctx->selected_sk = sk;
+	ctx->no_reuseport = flags & BPF_SK_LOOKUP_F_NO_REUSEPORT;
+	return 0;
+}
+
+static const struct bpf_func_proto bpf_sk_lookup_assign_proto = {
+	.func		= bpf_sk_lookup_assign,
+	.gpl_only	= false,
+	.ret_type	= RET_INTEGER,
+	.arg1_type	= ARG_PTR_TO_CTX,
+	.arg2_type	= ARG_PTR_TO_SOCKET,
+	.arg3_type	= ARG_ANYTHING,
+};
+
+static const struct bpf_func_proto *
+sk_lookup_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
+{
+	switch (func_id) {
+	case BPF_FUNC_sk_assign:
+		return &bpf_sk_lookup_assign_proto;
+	case BPF_FUNC_sk_release:
+		return &bpf_sk_release_proto;
+	default:
+		return bpf_base_func_proto(func_id);
+	}
+}
+
+static bool sk_lookup_is_valid_access(int off, int size,
+				      enum bpf_access_type type,
+				      const struct bpf_prog *prog,
+				      struct bpf_insn_access_aux *info)
+{
+	if (off < 0 || off >= sizeof(struct bpf_sk_lookup))
+		return false;
+	if (off % size != 0)
+		return false;
+	if (type != BPF_READ)
+		return false;
+
+	switch (off) {
+	case bpf_ctx_range(struct bpf_sk_lookup, family):
+	case bpf_ctx_range(struct bpf_sk_lookup, protocol):
+	case bpf_ctx_range(struct bpf_sk_lookup, remote_ip4):
+	case bpf_ctx_range(struct bpf_sk_lookup, local_ip4):
+	case bpf_ctx_range_till(struct bpf_sk_lookup, remote_ip6[0], remote_ip6[3]):
+	case bpf_ctx_range_till(struct bpf_sk_lookup, local_ip6[0], local_ip6[3]):
+	case bpf_ctx_range(struct bpf_sk_lookup, remote_port):
+	case bpf_ctx_range(struct bpf_sk_lookup, local_port):
+		return size == sizeof(__u32);
+
+	case offsetof(struct bpf_sk_lookup, sk):
+		info->reg_type = PTR_TO_SOCKET;
+		return size == sizeof(__u64);
+
+	default:
+		return false;
+	}
+}
+
+static u32 sk_lookup_convert_ctx_access(enum bpf_access_type type,
+					const struct bpf_insn *si,
+					struct bpf_insn *insn_buf,
+					struct bpf_prog *prog,
+					u32 *target_size)
+{
+	struct bpf_insn *insn = insn_buf;
+#if IS_ENABLED(CONFIG_IPV6)
+	int off;
+#endif
+
+	switch (si->off) {
+	case offsetof(struct bpf_sk_lookup, family):
+		BUILD_BUG_ON(sizeof_field(struct bpf_sk_lookup_kern, family) != 2);
+
+		*insn++ = BPF_LDX_MEM(BPF_H, si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, family));
+		break;
+
+	case offsetof(struct bpf_sk_lookup, protocol):
+		BUILD_BUG_ON(sizeof_field(struct bpf_sk_lookup_kern, protocol) != 2);
+
+		*insn++ = BPF_LDX_MEM(BPF_H, si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, protocol));
+		break;
+
+	case offsetof(struct bpf_sk_lookup, remote_ip4):
+		BUILD_BUG_ON(sizeof_field(struct bpf_sk_lookup_kern, v4.saddr) != 4);
+
+		*insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, v4.saddr));
+		break;
+
+	case offsetof(struct bpf_sk_lookup, local_ip4):
+		BUILD_BUG_ON(sizeof_field(struct bpf_sk_lookup_kern, v4.daddr) != 4);
+
+		*insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, v4.daddr));
+		break;
+
+	case bpf_ctx_range_till(struct bpf_sk_lookup,
+				remote_ip6[0], remote_ip6[3]):
+#if IS_ENABLED(CONFIG_IPV6)
+		BUILD_BUG_ON(sizeof_field(struct in6_addr, s6_addr32[0]) != 4);
+
+		off = si->off;
+		off -= offsetof(struct bpf_sk_lookup, remote_ip6[0]);
+		off += offsetof(struct in6_addr, s6_addr32[0]);
+		*insn++ = BPF_LDX_MEM(BPF_SIZEOF(void *), si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, v6.saddr));
+		*insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->dst_reg, off);
+#else
+		*insn++ = BPF_MOV32_IMM(si->dst_reg, 0);
+#endif
+		break;
+
+	case bpf_ctx_range_till(struct bpf_sk_lookup,
+				local_ip6[0], local_ip6[3]):
+#if IS_ENABLED(CONFIG_IPV6)
+		BUILD_BUG_ON(sizeof_field(struct in6_addr, s6_addr32[0]) != 4);
+
+		off = si->off;
+		off -= offsetof(struct bpf_sk_lookup, local_ip6[0]);
+		off += offsetof(struct in6_addr, s6_addr32[0]);
+		*insn++ = BPF_LDX_MEM(BPF_SIZEOF(void *), si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, v6.daddr));
+		*insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->dst_reg, off);
+#else
+		*insn++ = BPF_MOV32_IMM(si->dst_reg, 0);
+#endif
+		break;
+
+	case offsetof(struct bpf_sk_lookup, remote_port):
+		BUILD_BUG_ON(sizeof_field(struct bpf_sk_lookup_kern, sport) != 2);
+
+		*insn++ = BPF_LDX_MEM(BPF_H, si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, sport));
+		break;
+
+	case offsetof(struct bpf_sk_lookup, local_port):
+		BUILD_BUG_ON(sizeof_field(struct bpf_sk_lookup_kern, dport) != 2);
+
+		*insn++ = BPF_LDX_MEM(BPF_H, si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, dport));
+		break;
+
+	case offsetof(struct bpf_sk_lookup, sk):
+		*insn++ = BPF_LDX_MEM(BPF_SIZEOF(void *), si->dst_reg, si->src_reg,
+				      offsetof(struct bpf_sk_lookup_kern, selected_sk));
+		break;
+	}
+
+	return insn - insn_buf;
+}
+
+const struct bpf_prog_ops sk_lookup_prog_ops = {
+};
+
+const struct bpf_verifier_ops sk_lookup_verifier_ops = {
+	.get_func_proto		= sk_lookup_func_proto,
+	.is_valid_access	= sk_lookup_is_valid_access,
+	.convert_ctx_access	= sk_lookup_convert_ctx_access,
+};
+
 #endif /* CONFIG_INET */
 
 DEFINE_BPF_DISPATCHER(xdp)
diff --git a/scripts/bpf_helpers_doc.py b/scripts/bpf_helpers_doc.py
index 6bab40ff442e..ea21e86a807c 100755
--- a/scripts/bpf_helpers_doc.py
+++ b/scripts/bpf_helpers_doc.py
@@ -404,6 +404,7 @@ class PrinterHelpers(Printer):
 
     type_fwds = [
             'struct bpf_fib_lookup',
+            'struct bpf_sk_lookup',
             'struct bpf_perf_event_data',
             'struct bpf_perf_event_value',
             'struct bpf_pidns_info',
@@ -449,6 +450,7 @@ class PrinterHelpers(Printer):
             'struct bpf_perf_event_data',
             'struct bpf_perf_event_value',
             'struct bpf_pidns_info',
+            'struct bpf_sk_lookup',
             'struct bpf_sock',
             'struct bpf_sock_addr',
             'struct bpf_sock_ops',
@@ -485,6 +487,11 @@ class PrinterHelpers(Printer):
             'struct sk_msg_buff': 'struct sk_msg_md',
             'struct xdp_buff': 'struct xdp_md',
     }
+    # Helpers overloaded for different context types.
+    overloaded_helpers = [
+        'bpf_get_socket_cookie',
+        'bpf_sk_assign',
+    ]
 
     def print_header(self):
         header = '''\
@@ -541,7 +548,7 @@ class PrinterHelpers(Printer):
         for i, a in enumerate(proto['args']):
             t = a['type']
             n = a['name']
-            if proto['name'] == 'bpf_get_socket_cookie' and i == 0:
+            if proto['name'] in self.overloaded_helpers and i == 0:
                     t = 'void'
                     n = 'ctx'
             one_arg = '{}{}'.format(comma, self.map_type(t))
