97 lines
2.7 KiB
Bash
Executable File
97 lines
2.7 KiB
Bash
Executable File
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2021 Mark Johnston <markj@FreeBSD.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Leaking fp references when truncating SCM_RIGHTS control messages
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# Fixed in r343784
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. ../default.cfg
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cd /tmp
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cat > overflow3.c <<EOF
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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int
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main(void)
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{
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struct iovec iov;
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struct msghdr hdr, rhdr;
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struct cmsghdr *chdr;
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int nfds, sv[2];
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char ch;
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if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sv) != 0)
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err(1, "socketpair");
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nfds = 253;
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memset(&hdr, 0, sizeof(hdr));
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ch = 'a';
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iov.iov_base = &ch;
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iov.iov_len = 1;
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hdr.msg_iov = &iov;
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hdr.msg_iovlen = 1;
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hdr.msg_control = calloc(1, CMSG_SPACE(nfds * sizeof(int)));
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hdr.msg_controllen = CMSG_SPACE(nfds * sizeof(int));
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chdr = (struct cmsghdr *)hdr.msg_control;
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chdr->cmsg_len = CMSG_LEN(nfds * sizeof(int));
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chdr->cmsg_level = SOL_SOCKET;
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chdr->cmsg_type = SCM_RIGHTS;
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memset(&rhdr, 0, sizeof(rhdr));
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rhdr.msg_iov = &iov;
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rhdr.msg_iovlen = 1;
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rhdr.msg_control = calloc(1, CMSG_SPACE(0));
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rhdr.msg_controllen = CMSG_SPACE(0);
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for (;;) {
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if (sendmsg(sv[0], &hdr, 0) != 1)
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err(1, "sendmsg");
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if (recvmsg(sv[1], &rhdr, 0) != 1)
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err(1, "recvmsg");
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if ((rhdr.msg_flags & MSG_CTRUNC) == 0)
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errx(1, "MSG_CTRUNC not set");
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}
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return (0);
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}
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EOF
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mycc -o overflow3 -Wall -Wextra -O2 overflow3.c || exit 1
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rm overflow3.c
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timeout 2m ./overflow3
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rm overflow3
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exit
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