mirror of
https://github.com/AsahiLinux/u-boot
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615828721a
Both the Linux kernel and libbsd agree that strlcpy() should always return strlen(src) and not include the NUL termination. The incorrect U-Boot implementation makes it impossible to check the return value for truncation, and breaks code written with the usual implementation in mind (for example, fdtdec_add_reserved_memory() was subtly broken). I reviewed all callers of strlcpy() and strlcat() and fixed them according to my understanding of the intended function. This reverts commitd3358ecc54and adds related fixes. Fixes:d3358ecc54("lib: string: Fix strlcpy return value") Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Sean Anderson <sean.anderson@seco.com>
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.1+
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/*
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* Copyright (C) 2021 Sean Anderson <seanga2@gmail.com>
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* Copyright (C) 2011-2021 Free Software Foundation, Inc.
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*
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* These tests adapted from glibc's string/test-strncat.c
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*/
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#include <common.h>
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#include <test/lib.h>
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#include <test/test.h>
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#include <test/ut.h>
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#define BUF_SIZE 4096
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char buf1[BUF_SIZE], buf2[BUF_SIZE];
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static int do_test_strlcat(struct unit_test_state *uts, int line, size_t align1,
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size_t align2, size_t len1, size_t len2, size_t n)
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{
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char *s1, *s2;
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size_t i, len, expected, actual;
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align1 &= 7;
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if (align1 + len1 >= BUF_SIZE)
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return 0;
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if (align1 + n > BUF_SIZE)
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return 0;
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align2 &= 7;
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if (align2 + len1 + len2 >= BUF_SIZE)
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return 0;
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if (align2 + len1 + n > BUF_SIZE)
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return 0;
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s1 = buf1 + align1;
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s2 = buf2 + align2;
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for (i = 0; i < len1 - 1; i++)
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s1[i] = 32 + 23 * i % (127 - 32);
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s1[len1 - 1] = '\0';
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for (i = 0; i < len2 - 1; i++)
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s2[i] = 32 + 23 * i % (127 - 32);
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s2[len2 - 1] = '\0';
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expected = min(strlen(s2), n) + strlen(s1);
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actual = strlcat(s2, s1, n);
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if (expected != actual) {
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ut_failf(uts, __FILE__, line, __func__,
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"strlcat(s2, s1, n) == min(len2, n) + len1",
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"Expected %#zx (%zd), got %#zx (%zd)",
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expected, expected, actual, actual);
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return CMD_RET_FAILURE;
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}
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len = min3(len1, n - len2, (size_t)0);
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if (memcmp(s2 + len2, s1, len)) {
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ut_failf(uts, __FILE__, line, __func__,
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"s2 + len1 == s1",
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"Expected \"%.*s\", got \"%.*s\"",
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(int)len, s1, (int)len, s2 + len2);
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return CMD_RET_FAILURE;
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}
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i = min(n, len1 + len2 - 1) - 1;
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if (len2 < n && s2[i] != '\0') {
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ut_failf(uts, __FILE__, line, __func__,
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"n < len1 && s2[len2 + n] == '\\0'",
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"Expected s2[%zd] = '\\0', got %d ('%c')",
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i, s2[i], s2[i]);
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return CMD_RET_FAILURE;
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}
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return 0;
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}
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#define test_strlcat(align1, align2, len1, len2, n) do { \
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int ret = do_test_strlcat(uts, __LINE__, align1, align2, len1, len2, \
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n); \
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if (ret) \
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return ret; \
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} while (0)
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static int lib_test_strlcat(struct unit_test_state *uts)
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{
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size_t i, n;
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test_strlcat(0, 2, 2, 2, SIZE_MAX);
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test_strlcat(0, 0, 4, 4, SIZE_MAX);
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test_strlcat(4, 0, 4, 4, SIZE_MAX);
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test_strlcat(0, 0, 8, 8, SIZE_MAX);
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test_strlcat(0, 8, 8, 8, SIZE_MAX);
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for (i = 1; i < 8; i++) {
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test_strlcat(0, 0, 8 << i, 8 << i, SIZE_MAX);
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test_strlcat(8 - i, 2 * i, 8 << i, 8 << i, SIZE_MAX);
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test_strlcat(0, 0, 8 << i, 2 << i, SIZE_MAX);
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test_strlcat(8 - i, 2 * i, 8 << i, 2 << i, SIZE_MAX);
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test_strlcat(i, 2 * i, 8 << i, 1, SIZE_MAX);
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test_strlcat(2 * i, i, 8 << i, 1, SIZE_MAX);
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test_strlcat(i, i, 8 << i, 10, SIZE_MAX);
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}
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for (n = 2; n <= 2048; n *= 4) {
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test_strlcat(0, 2, 2, 2, n);
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test_strlcat(0, 0, 4, 4, n);
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test_strlcat(4, 0, 4, 4, n);
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test_strlcat(0, 0, 8, 8, n);
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test_strlcat(0, 8, 8, 8, n);
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for (i = 1; i < 8; i++) {
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test_strlcat(0, 0, 8 << i, 8 << i, n);
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test_strlcat(8 - i, 2 * i, 8 << i, 8 << i, n);
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test_strlcat(0, 0, 8 << i, 2 << i, n);
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test_strlcat(8 - i, 2 * i, 8 << i, 2 << i, n);
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test_strlcat(i, 2 * i, 8 << i, 1, n);
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test_strlcat(2 * i, i, 8 << i, 1, n);
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test_strlcat(i, i, 8 << i, 10, n);
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}
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}
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return 0;
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}
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LIB_TEST(lib_test_strlcat, 0);
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