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commit ef972a4c50014a16132b5c75571cfb6b30bef136
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Author: Martin Sebor <msebor@redhat.com>
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Date: Mon Jan 17 10:21:34 2022 +0100
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sunrpc: Test case for clnt_create "unix" buffer overflow (bug 22542)
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Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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# Conflicts:
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# sunrpc/Makefile
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diff --git a/sunrpc/Makefile b/sunrpc/Makefile
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index 85b0b3356aaf81a3..2f8f0597c99e117f 100644
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--- a/sunrpc/Makefile
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+++ b/sunrpc/Makefile
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@@ -95,7 +95,8 @@ others += rpcgen
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endif
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tests = tst-xdrmem tst-xdrmem2 test-rpcent tst-udp-error tst-udp-timeout \
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- tst-udp-nonblocking
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+ tst-udp-nonblocking tst-bug22542
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+
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xtests := tst-getmyaddr
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ifeq ($(have-thread-library),yes)
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@@ -246,3 +247,4 @@ $(objpfx)tst-udp-timeout: $(common-objpfx)linkobj/libc.so
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$(objpfx)tst-udp-nonblocking: $(common-objpfx)linkobj/libc.so
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$(objpfx)tst-udp-garbage: \
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$(common-objpfx)linkobj/libc.so $(shared-thread-library)
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+$(objpfx)tst-bug22542: $(common-objpfx)linkobj/libc.so
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diff --git a/sunrpc/tst-bug22542.c b/sunrpc/tst-bug22542.c
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new file mode 100644
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index 0000000000000000..d6cd79787bdef21d
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--- /dev/null
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+++ b/sunrpc/tst-bug22542.c
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@@ -0,0 +1,44 @@
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+/* Test to verify that overlong hostname is rejected by clnt_create
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+ and doesn't cause a buffer overflow (bug 22542).
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+
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+ Copyright (C) 2022 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <errno.h>
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+#include <rpc/clnt.h>
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+#include <string.h>
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+#include <support/check.h>
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+#include <sys/socket.h>
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+#include <sys/un.h>
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+
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+static int
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+do_test (void)
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+{
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+ /* Create an arbitrary hostname that's longer than fits in sun_path. */
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+ char name [sizeof ((struct sockaddr_un*)0)->sun_path * 2];
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+ memset (name, 'x', sizeof name - 1);
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+ name [sizeof name - 1] = '\0';
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+
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+ errno = 0;
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+ CLIENT *clnt = clnt_create (name, 0, 0, "unix");
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+
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+ TEST_VERIFY (clnt == NULL);
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+ TEST_COMPARE (errno, EINVAL);
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+ return 0;
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+}
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+
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+#include <support/test-driver.c>
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