ws2_32/test: Fix sockaddr buffer overflow in test_reuseaddr.

Today, test_reuseaddr() triggers a buffer overflow when accept()-ing an IPv6 client due to the supplied peer name buffer (`struct sockaddr`) being too small to hold an AF_INET6 address (`struct sockaddr_in6`). Fix this by changing the type of `saddr` from `struct sockaddr` to `struct sockaddr_storage`. Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54376

ws2_32/test: Fix sockaddr buffer overflow in test_reuseaddr.
876742bf · Jinoh Kang · Alexandre Julliard · c5c9108d · 876742bf
Commit 876742bf authored Jan 26, 2023 by Jinoh Kang Committed by Alexandre Julliard Jan 25, 2023
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Showing with 4 additions and 4 deletions

sock.c dlls/ws2_32/tests/sock.c +4 -4

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--- a/dlls/ws2_32/tests/sock.c
+++ b/dlls/ws2_32/tests/sock.c
@@ -2153,7 +2153,7 @@ static void test_reuseaddr(void)
    };
    unsigned int rc, reuse, value;
-    struct sockaddr saddr;
+    struct sockaddr_storage saddr;
    SOCKET s1, s2, s3, s4;
    unsigned int i, j;
    int size;
@@ -2245,7 +2245,7 @@ static void test_reuseaddr(void)
        /* The connection is delivered to the first socket. */
        size = tests[i].addrlen;
-        s4 = accept(s1, &saddr, &size);
+        s4 = accept(s1, (struct sockaddr *)&saddr, &size);
        ok(s4 != INVALID_SOCKET, "got error %d.\n", WSAGetLastError());
        closesocket(s1);
@@ -2279,7 +2279,7 @@ static void test_reuseaddr(void)
        ok(!rc, "got error %d.\n", WSAGetLastError());
        size = tests[i].addrlen;
-        s4 = accept(s2, &saddr, &size);
+        s4 = accept(s2, (struct sockaddr *)&saddr, &size);
        todo_wine ok(s4 != INVALID_SOCKET, "got error %d.\n", WSAGetLastError());
        closesocket(s1);
@@ -2313,7 +2313,7 @@ static void test_reuseaddr(void)
        rc = connect(s3, tests[i].addr_loopback, tests[i].addrlen);
        ok(!rc, "got error %d.\n", WSAGetLastError());
        size = tests[i].addrlen;
-        s4 = accept(s1, &saddr, &size);
+        s4 = accept(s1, (struct sockaddr *)&saddr, &size);
        ok(s4 != INVALID_SOCKET, "got error %d.\n", WSAGetLastError());