xnu-3248.20.55.tar.gz

[apple/xnu.git] / bsd / kern / uipc_syscalls.c

diff --git a/bsd/kern/uipc_syscalls.c b/bsd/kern/uipc_syscalls.c
index f44291282652491235f99d5e12165aab78502774..03330fbcbca27bdb133de8c64a154adbd9124748 100644 (file)
--- a/bsd/kern/uipc_syscalls.c
+++ b/bsd/kern/uipc_syscalls.c
@@ -2756,6 +2756,7 @@ getsockaddr(struct socket *so, struct sockaddr **namp, user_addr_t uaddr,
 {
        struct sockaddr *sa;
        int error;
+       size_t alloclen;
 
        if (len > SOCK_MAXADDRLEN)
                return (ENAMETOOLONG);
@@ -2763,7 +2764,12 @@ getsockaddr(struct socket *so, struct sockaddr **namp, user_addr_t uaddr,
        if (len < offsetof(struct sockaddr, sa_data[0]))
                return (EINVAL);
 
-       MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK | M_ZERO);
+       /*
+        * Workaround for rdar://23362120
+        * Allways allocate a buffer that can hold an IPv6 socket address
+        */
+       alloclen = MAX(len, sizeof(struct sockaddr_in6));
+       MALLOC(sa, struct sockaddr *, alloclen, M_SONAME, M_WAITOK | M_ZERO);
        if (sa == NULL) {
                return (ENOMEM);
        }