view src/kword_test.c @ 33262:6eac4f616293 v9.0.1899

patch 9.0.1899: potential buffer overflow in PBYTE macro Commit: https://github.com/vim/vim/commit/ffb13674d1af1c90beb229867ec989e4fb232df3 Author: Christian Brabandt <cb@256bit.org> Date: Fri Sep 15 20:22:02 2023 +0200 patch 9.0.1899: potential buffer overflow in PBYTE macro Problem: potential buffer overflow in PBYTE macro Solution: Check returned memline length closes: #13083 the PBYTE macro is used to put byte c at a position lp of the returned memline. However, in case of unexpected errors ml_get_buf() may return either "???" or an empty line in which case it is quite likely that we are causing a buffer overrun. Therefore, switch the macro PBYTE (which is only used in ops.c anyhow) to a function, that verifies that we will only try to access within the given length of the buffer. Also, since the macro is only used in ops.c, move the definition from macros.h to ops.c Signed-off-by: Christian Brabandt <cb@256bit.org>
author Christian Brabandt <cb@256bit.org>
date Fri, 15 Sep 2023 20:30:07 +0200
parents aadd1cae2ff5
children
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/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * kword_test.c: Unittests for vim_iswordc() and vim_iswordp().
 */

#undef NDEBUG
#include <assert.h>

// Must include main.c because it contains much more than just main()
#define NO_VIM_MAIN
#include "main.c"

// This file has to be included because the tested functions are static
#include "charset.c"

/*
 * Test the results of vim_iswordc() and vim_iswordp() are matched.
 */
    static void
test_isword_funcs_utf8(void)
{
    buf_T buf;
    int c;

    CLEAR_FIELD(buf);
    p_enc = (char_u *)"utf-8";
    p_isi = (char_u *)"";
    p_isp = (char_u *)"";
    p_isf = (char_u *)"";
    buf.b_p_isk = (char_u *)"@,48-57,_,128-167,224-235";

    curbuf = &buf;
    mb_init(); // calls init_chartab()

    for (c = 0; c < 0x10000; ++c)
    {
	char_u p[4] = {0};
	int c1;
	int retc;
	int retp;

	utf_char2bytes(c, p);
	c1 = utf_ptr2char(p);
	if (c != c1)
	{
	    fprintf(stderr, "Failed: ");
	    fprintf(stderr,
		    "[c = %#04x, p = {%#02x, %#02x, %#02x}] ",
		    c, p[0], p[1], p[2]);
	    fprintf(stderr, "c != utf_ptr2char(p) (=%#04x)\n", c1);
	    abort();
	}
	retc = vim_iswordc_buf(c, &buf);
	retp = vim_iswordp_buf(p, &buf);
	if (retc != retp)
	{
	    fprintf(stderr, "Failed: ");
	    fprintf(stderr,
		    "[c = %#04x, p = {%#02x, %#02x, %#02x}] ",
		    c, p[0], p[1], p[2]);
	    fprintf(stderr, "vim_iswordc(c) (=%d) != vim_iswordp(p) (=%d)\n",
		    retc, retp);
	    abort();
	}
    }
}

    int
main(void)
{
    estack_init();
    test_isword_funcs_utf8();
    return 0;
}