mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 01:04:08 +08:00
16c7fa0582
There are several places in kernel where modules unescapes input to convert C-Style Escape Sequences into byte codes. The patch provides generic implementation of such approach. Test cases are also included into the patch. [akpm@linux-foundation.org: clarify comment] [akpm@linux-foundation.org: export get_random_int() to modules] Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Samuel Thibault <samuel.thibault@ens-lyon.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jason Baron <jbaron@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: William Hubbs <w.d.hubbs@gmail.com> Cc: Chris Brannon <chris@the-brannons.com> Cc: Kirk Reiser <kirk@braille.uwo.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
|
|
* Test cases for lib/string_helpers.c module.
|
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/random.h>
|
|
#include <linux/string.h>
|
|
#include <linux/string_helpers.h>
|
|
|
|
struct test_string {
|
|
const char *in;
|
|
const char *out;
|
|
unsigned int flags;
|
|
};
|
|
|
|
static const struct test_string strings[] __initconst = {
|
|
{
|
|
.in = "\\f\\ \\n\\r\\t\\v",
|
|
.out = "\f\\ \n\r\t\v",
|
|
.flags = UNESCAPE_SPACE,
|
|
},
|
|
{
|
|
.in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777",
|
|
.out = " \001\00387\0064\005 \\8aH?7",
|
|
.flags = UNESCAPE_OCTAL,
|
|
},
|
|
{
|
|
.in = "\\xv\\xa\\x2c\\xD\\x6f2",
|
|
.out = "\\xv\n,\ro2",
|
|
.flags = UNESCAPE_HEX,
|
|
},
|
|
{
|
|
.in = "\\h\\\\\\\"\\a\\e\\",
|
|
.out = "\\h\\\"\a\e\\",
|
|
.flags = UNESCAPE_SPECIAL,
|
|
},
|
|
};
|
|
|
|
static void __init test_string_unescape(unsigned int flags, bool inplace)
|
|
{
|
|
char in[256];
|
|
char out_test[256];
|
|
char out_real[256];
|
|
int i, p = 0, q_test = 0, q_real = sizeof(out_real);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(strings); i++) {
|
|
const char *s = strings[i].in;
|
|
int len = strlen(strings[i].in);
|
|
|
|
/* Copy string to in buffer */
|
|
memcpy(&in[p], s, len);
|
|
p += len;
|
|
|
|
/* Copy expected result for given flags */
|
|
if (flags & strings[i].flags) {
|
|
s = strings[i].out;
|
|
len = strlen(strings[i].out);
|
|
}
|
|
memcpy(&out_test[q_test], s, len);
|
|
q_test += len;
|
|
}
|
|
in[p++] = '\0';
|
|
|
|
/* Call string_unescape and compare result */
|
|
if (inplace) {
|
|
memcpy(out_real, in, p);
|
|
if (flags == UNESCAPE_ANY)
|
|
q_real = string_unescape_any_inplace(out_real);
|
|
else
|
|
q_real = string_unescape_inplace(out_real, flags);
|
|
} else if (flags == UNESCAPE_ANY) {
|
|
q_real = string_unescape_any(in, out_real, q_real);
|
|
} else {
|
|
q_real = string_unescape(in, out_real, q_real, flags);
|
|
}
|
|
|
|
if (q_real != q_test || memcmp(out_test, out_real, q_test)) {
|
|
pr_warn("Test failed: flags = %u\n", flags);
|
|
print_hex_dump(KERN_WARNING, "Input: ",
|
|
DUMP_PREFIX_NONE, 16, 1, in, p - 1, true);
|
|
print_hex_dump(KERN_WARNING, "Expected: ",
|
|
DUMP_PREFIX_NONE, 16, 1, out_test, q_test, true);
|
|
print_hex_dump(KERN_WARNING, "Got: ",
|
|
DUMP_PREFIX_NONE, 16, 1, out_real, q_real, true);
|
|
}
|
|
}
|
|
|
|
static int __init test_string_helpers_init(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
pr_info("Running tests...\n");
|
|
for (i = 0; i < UNESCAPE_ANY + 1; i++)
|
|
test_string_unescape(i, false);
|
|
test_string_unescape(get_random_int() % (UNESCAPE_ANY + 1), true);
|
|
|
|
return -EINVAL;
|
|
}
|
|
module_init(test_string_helpers_init);
|
|
MODULE_LICENSE("Dual BSD/GPL");
|