diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 148d7a32754e..975c5cbf9a86 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -105,4 +105,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/frv/include/uapi/asm/socket.h b/arch/frv/include/uapi/asm/socket.h
index 1ccf45657472..8e53a149b216 100644
--- a/arch/frv/include/uapi/asm/socket.h
+++ b/arch/frv/include/uapi/asm/socket.h
@@ -98,5 +98,7 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif /* _ASM_SOCKET_H */
 
diff --git a/arch/ia64/include/uapi/asm/socket.h b/arch/ia64/include/uapi/asm/socket.h
index 2c3f4b48042a..d122c30429ae 100644
--- a/arch/ia64/include/uapi/asm/socket.h
+++ b/arch/ia64/include/uapi/asm/socket.h
@@ -107,4 +107,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif /* _ASM_IA64_SOCKET_H */
diff --git a/arch/m32r/include/uapi/asm/socket.h b/arch/m32r/include/uapi/asm/socket.h
index ae6548d29a18..7e689cc14668 100644
--- a/arch/m32r/include/uapi/asm/socket.h
+++ b/arch/m32r/include/uapi/asm/socket.h
@@ -98,4 +98,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif /* _ASM_M32R_SOCKET_H */
diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h
index 3418ec9c1c50..5c0947d063cc 100644
--- a/arch/mips/include/uapi/asm/socket.h
+++ b/arch/mips/include/uapi/asm/socket.h
@@ -116,4 +116,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/mn10300/include/uapi/asm/socket.h b/arch/mn10300/include/uapi/asm/socket.h
index 4526e92301a6..219f516eb6ad 100644
--- a/arch/mn10300/include/uapi/asm/socket.h
+++ b/arch/mn10300/include/uapi/asm/socket.h
@@ -98,4 +98,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif /* _ASM_SOCKET_H */
diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h
index 514701840bd9..2dd2c132047e 100644
--- a/arch/parisc/include/uapi/asm/socket.h
+++ b/arch/parisc/include/uapi/asm/socket.h
@@ -97,4 +97,6 @@
 
 #define SO_COOKIE		0x4032
 
+#define SO_PEERGROUPS		0x4033
+
 #endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/powerpc/include/uapi/asm/socket.h b/arch/powerpc/include/uapi/asm/socket.h
index 58e2ec0310fc..2ce8c4503b1c 100644
--- a/arch/powerpc/include/uapi/asm/socket.h
+++ b/arch/powerpc/include/uapi/asm/socket.h
@@ -105,4 +105,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif	/* _ASM_POWERPC_SOCKET_H */
diff --git a/arch/s390/include/uapi/asm/socket.h b/arch/s390/include/uapi/asm/socket.h
index e8e5ecf673fd..90f0899a1064 100644
--- a/arch/s390/include/uapi/asm/socket.h
+++ b/arch/s390/include/uapi/asm/socket.h
@@ -104,4 +104,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif /* _ASM_SOCKET_H */
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h
index 3f4ad19d9ec7..5dd96465bc5e 100644
--- a/arch/sparc/include/uapi/asm/socket.h
+++ b/arch/sparc/include/uapi/asm/socket.h
@@ -94,6 +94,8 @@
 
 #define SO_COOKIE		0x003b
 
+#define SO_PEERGROUPS		0x003c
+
 /* Security levels - as per NRL IPv6 - don't actually do anything */
 #define SO_SECURITY_AUTHENTICATION		0x5001
 #define SO_SECURITY_ENCRYPTION_TRANSPORT	0x5002
diff --git a/arch/xtensa/include/uapi/asm/socket.h b/arch/xtensa/include/uapi/asm/socket.h
index 1eb6d2fe70d3..e6df5066b9e3 100644
--- a/arch/xtensa/include/uapi/asm/socket.h
+++ b/arch/xtensa/include/uapi/asm/socket.h
@@ -109,4 +109,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif	/* _XTENSA_SOCKET_H */
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index 2b488565599d..79634c00611b 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -100,4 +100,6 @@
 
 #define SO_COOKIE		57
 
+#define SO_PEERGROUPS		58
+
 #endif /* __ASM_GENERIC_SOCKET_H */
diff --git a/net/core/sock.c b/net/core/sock.c
index 727f924b7f91..1987bf13d755 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1074,6 +1074,18 @@ static void cred_to_ucred(struct pid *pid, const struct cred *cred,
 	}
 }
 
+static int groups_to_user(gid_t __user *dst, const struct group_info *src)
+{
+	struct user_namespace *user_ns = current_user_ns();
+	int i;
+
+	for (i = 0; i < src->ngroups; i++)
+		if (put_user(from_kgid_munged(user_ns, src->gid[i]), dst + i))
+			return -EFAULT;
+
+	return 0;
+}
+
 int sock_getsockopt(struct socket *sock, int level, int optname,
 		    char __user *optval, int __user *optlen)
 {
@@ -1227,6 +1239,27 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 		goto lenout;
 	}
 
+	case SO_PEERGROUPS:
+	{
+		int ret, n;
+
+		if (!sk->sk_peer_cred)
+			return -ENODATA;
+
+		n = sk->sk_peer_cred->group_info->ngroups;
+		if (len < n * sizeof(gid_t)) {
+			len = n * sizeof(gid_t);
+			return put_user(len, optlen) ? -EFAULT : -ERANGE;
+		}
+		len = n * sizeof(gid_t);
+
+		ret = groups_to_user((gid_t __user *)optval,
+				     sk->sk_peer_cred->group_info);
+		if (ret)
+			return ret;
+		goto lenout;
+	}
+
 	case SO_PEERNAME:
 	{
 		char address[128];
