86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* Copyright (c) Red Hat Inc., 2007
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* 11/2007 Copied from sendfile02.c by Masatake YAMATO
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*/
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/*\
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* [Description]
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*
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* Testcase to test that sendfile(2) system call returns EFAULT when passing
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* wrong offset pointer.
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*
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* [Algorithm]
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*
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* Given wrong address or protected buffer as OFFSET argument to sendfile:
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* - a wrong address is created by munmap a buffer allocated by mmap
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* - a protected buffer is created by mmap with specifying protection
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/sendfile.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/mman.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "tst_test.h"
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static int in_fd;
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static int out_fd;
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struct test_case_t {
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int protection;
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int pass_unmapped_buffer;
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const char *desc;
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} tc[] = {
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{PROT_NONE, 0, "pass_mapped_buffer"},
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{PROT_READ, 0, "pass_mapped_buffer"},
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{PROT_EXEC, 0, "pass_mapped_buffer"},
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{PROT_EXEC | PROT_READ, 0, "pass_mapped_buffer"},
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{PROT_READ | PROT_WRITE, 1, "pass_unmapped_buffer"}
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};
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static void setup(void)
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{
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in_fd = SAFE_OPEN("in_file", O_CREAT | O_RDWR, 0600);
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out_fd = SAFE_CREAT("out_file", 0600);
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}
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static void cleanup(void)
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{
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SAFE_CLOSE(in_fd);
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SAFE_CLOSE(out_fd);
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}
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static void run(unsigned int i)
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{
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off_t *protected_buffer;
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protected_buffer = SAFE_MMAP(NULL, sizeof(*protected_buffer),
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tc[i].protection,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (tc[i].pass_unmapped_buffer)
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SAFE_MUNMAP(protected_buffer, sizeof(*protected_buffer));
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TST_EXP_FAIL(sendfile(out_fd, in_fd, protected_buffer, 1),
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EFAULT, "sendfile(..) with %s, protection=%d",
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tc[i].desc, tc[i].protection);
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if (!tc[i].pass_unmapped_buffer)
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SAFE_MUNMAP(protected_buffer, sizeof(*protected_buffer));
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tc),
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.needs_tmpdir = 1,
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.cleanup = cleanup,
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.setup = setup,
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.test = run,
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};
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