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Merge pull request #23336 from keszybz/fuzz-calendarspec-more-coverage

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More coverage in fuzz-calendarspec
This commit is contained in:
Yu Watanabe 2022-05-11 02:12:11 +09:00 committed by GitHub
parent 07b420a3b9 8e1e59b9ad
commit 01c99b29e9
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 121 additions and 66 deletions
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37
src/basic/time-util.c
View file

@ -29,10 +29,10 @@
static clockid_t map_clock_id(clockid_t c) {
/* Some more exotic archs (s390, ppc, …) lack the "ALARM" flavour of the clocks. Thus, clock_gettime() will
* fail for them. Since they are essentially the same as their non-ALARM pendants (their only difference is
* when timers are set on them), let's just map them accordingly. This way, we can get the correct time even on
* those archs. */
/* Some more exotic archs (s390, ppc, …) lack the "ALARM" flavour of the clocks. Thus,
* clock_gettime() will fail for them. Since they are essentially the same as their non-ALARM
* pendants (their only difference is when timers are set on them), let's just map them
* accordingly. This way, we can get the correct time even on those archs. */
switch (c) {
@ -295,8 +295,8 @@ char *format_timestamp_style(
usec_t t,
TimestampStyle style) {
/* The weekdays in non-localized (English) form. We use this instead of the localized form, so that our
* generated timestamps may be parsed with parse_timestamp(), and always read the same. */
/* The weekdays in non-localized (English) form. We use this instead of the localized form, so that
* our generated timestamps may be parsed with parse_timestamp(), and always read the same. */
static const char * const weekdays[] = {
[0] = "Sun",
[1] = "Mon",
@ -383,8 +383,8 @@ char *format_timestamp_style(
/* Append the timezone */
n = strlen(buf);
if (utc) {
/* If this is UTC then let's explicitly use the "UTC" string here, because gmtime_r() normally uses the
* obsolete "GMT" instead. */
/* If this is UTC then let's explicitly use the "UTC" string here, because gmtime_r()
* normally uses the obsolete "GMT" instead. */
if (n + 5 > l)
return NULL; /* "UTC" doesn't fit. */
@ -399,12 +399,14 @@ char *format_timestamp_style(
/* The full time zone does not fit in. Yuck. */
if (n + 1 + _POSIX_TZNAME_MAX + 1 > l)
return NULL; /* Not even enough space for the POSIX minimum (of 6)? In that case, complain that it doesn't fit */
return NULL; /* Not even enough space for the POSIX minimum (of 6)? In that
* case, complain that it doesn't fit. */
/* So the time zone doesn't fit in fully, but the caller passed enough space for the POSIX
* minimum time zone length. In this case suppress the timezone entirely, in order not to dump
* an overly long, hard to read string on the user. This should be safe, because the user will
* assume the local timezone anyway if none is shown. And so does parse_timestamp(). */
/* So the time zone doesn't fit in fully, but the caller passed enough space for the
* POSIX minimum time zone length. In this case suppress the timezone entirely, in
* order not to dump an overly long, hard to read string on the user. This should be
* safe, because the user will assume the local timezone anyway if none is shown. And
* so does parse_timestamp(). */
} else {
buf[n++] = ' ';
strcpy(buf + n, tm.tm_zone);
@ -700,10 +702,11 @@ static int parse_timestamp_impl(const char *t, usec_t *usec, bool with_tz) {
tzset();
/* See if the timestamp is suffixed by either the DST or non-DST local timezone. Note that we only
* support the local timezones here, nothing else. Not because we wouldn't want to, but simply because
* there are no nice APIs available to cover this. By accepting the local time zone strings, we make
* sure that all timestamps written by format_timestamp() can be parsed correctly, even though we don't
/* See if the timestamp is suffixed by either the DST or non-DST local timezone. Note
* that we only support the local timezones here, nothing else. Not because we
* wouldn't want to, but simply because there are no nice APIs available to cover
* this. By accepting the local time zone strings, we make sure that all timestamps
* written by format_timestamp() can be parsed correctly, even though we don't
* support arbitrary timezone specifications. */
for (j = 0; j <= 1; j++) {

44
src/fuzz/fuzz-calendarspec.c
View file

@ -4,20 +4,54 @@
#include "calendarspec.h"
#include "fd-util.h"
#include "fuzz.h"
#include "string-util.h"
#include "time-util.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
_cleanup_(calendar_spec_freep) CalendarSpec *cspec = NULL;
_cleanup_free_ char *str = NULL, *p = NULL;
_cleanup_free_ char *str = NULL;
int r;
if (!getenv("SYSTEMD_LOG_LEVEL"))
log_set_max_level(LOG_CRIT);
str = memdup_suffix0(data, size);
if (calendar_spec_from_string(str, &cspec) >= 0) {
(void) calendar_spec_valid(cspec);
(void) calendar_spec_normalize(cspec);
(void) calendar_spec_to_string(cspec, &p);
size_t l1 = strlen(str);
const char* usecs = l1 < size ? str + l1 + 1 : "";
r = calendar_spec_from_string(str, &cspec);
if (r < 0) {
log_debug_errno(r, "Failed to parse \"%s\": %m", str);
return 0;
}
_cleanup_free_ char *p = NULL;
assert_se(calendar_spec_valid(cspec));
assert_se(calendar_spec_to_string(cspec, &p) == 0);
assert(p);
log_debug("spec: %s → %s", str, p);
_cleanup_(calendar_spec_freep) CalendarSpec *cspec2 = NULL;
assert_se(calendar_spec_from_string(p, &cspec2) >= 0);
assert_se(calendar_spec_valid(cspec2));
usec_t usec = 0;
(void) parse_time(usecs, &usec, 1);
/* If timezone is set, calendar_spec_next_usec() would fork, bleh :(
* Let's not try that. */
cspec->timezone = mfree(cspec->timezone);
log_debug("00: %s", strna(FORMAT_TIMESTAMP(usec)));
for (unsigned i = 1; i <= 20; i++) {
r = calendar_spec_next_usec(cspec, usec, &usec);
if (r < 0) {
log_debug_errno(r, "%02u: %m", i);
break;
}
log_debug("%02u: %s", i, FORMAT_TIMESTAMP(usec));
}
return 0;

39
src/shared/calendarspec.c
View file

@ -145,7 +145,7 @@ static void fix_year(CalendarComponent *c) {
}
}
int calendar_spec_normalize(CalendarSpec *c) {
static void calendar_spec_normalize(CalendarSpec *c) {
assert(c);
if (streq_ptr(c->timezone, "UTC")) {
@ -167,8 +167,6 @@ int calendar_spec_normalize(CalendarSpec *c) {
normalize_chain(&c->hour);
normalize_chain(&c->minute);
normalize_chain(&c->microsecond);
return 0;
}
static bool chain_valid(CalendarComponent *c, int from, int to, bool end_of_month) {
@ -290,17 +288,24 @@ static void format_weekdays(FILE *f, const CalendarSpec *c) {
}
}
static void format_chain(FILE *f, int space, const CalendarComponent *c, bool usec) {
static bool chain_is_star(const CalendarComponent *c, bool usec) {
/* Return true if the whole chain can be replaced by '*'.
* This happens when the chain is empty or one of the components covers all. */
if (!c)
return true;
if (usec)
for (; c; c = c->next)
if (c->start == 0 && c->stop < 0 && c->repeat == USEC_PER_SEC)
return true;
return false;
}
static void _format_chain(FILE *f, int space, const CalendarComponent *c, bool start, bool usec) {
int d = usec ? (int) USEC_PER_SEC : 1;
assert(f);
if (!c) {
fputc('*', f);
return;
}
if (usec && c->start == 0 && c->repeat == USEC_PER_SEC && !c->next) {
if (start && chain_is_star(c, usec)) {
fputc('*', f);
return;
}
@ -323,10 +328,14 @@ static void format_chain(FILE *f, int space, const CalendarComponent *c, bool us
if (c->next) {
fputc(',', f);
format_chain(f, space, c->next, usec);
_format_chain(f, space, c->next, false, usec);
}
}
static void format_chain(FILE *f, int space, const CalendarComponent *c, bool usec) {
_format_chain(f, space, c, /* start = */ true, usec);
}
int calendar_spec_to_string(const CalendarSpec *c, char **p) {
char *buf = NULL;
size_t sz = 0;
@ -431,12 +440,10 @@ static int parse_weekdays(const char **p, CalendarSpec *c) {
c->weekdays_bits |= 1 << day_nr[i].nr;
if (l >= 0) {
int j;
if (l > day_nr[i].nr)
return -EINVAL;
for (j = l + 1; j < day_nr[i].nr; j++)
for (int j = l + 1; j < day_nr[i].nr; j++)
c->weekdays_bits |= 1 << j;
}
@ -1086,9 +1093,7 @@ int calendar_spec_from_string(const char *p, CalendarSpec **spec) {
return -EINVAL;
}
r = calendar_spec_normalize(c);
if (r < 0)
return r;
calendar_spec_normalize(c);
if (!calendar_spec_valid(c))
return -EINVAL;

1
src/shared/calendarspec.h
View file

@ -35,7 +35,6 @@ typedef struct CalendarSpec {
CalendarSpec* calendar_spec_free(CalendarSpec *c);
int calendar_spec_normalize(CalendarSpec *spec);
bool calendar_spec_valid(CalendarSpec *spec);
int calendar_spec_to_string(const CalendarSpec *spec, char **p);

63
src/test/test-calendarspec.c
View file

@ -13,10 +13,15 @@ static void _test_one(int line, const char *input, const char *output) {
usec_t u;
int r;
assert_se(calendar_spec_from_string(input, &c) >= 0);
r = calendar_spec_from_string(input, &c);
if (r < 0)
log_error_errno(r, "Failed to parse \"%s\": %m", input);
assert_se(r >= 0);
assert_se(calendar_spec_to_string(c, &p) >= 0);
log_info("line %d: \"%s\" → \"%s\"", line, input, p);
log_info("line %d: \"%s\" → \"%s\"%s%s", line, input, p,
!streq(p, output) ? " expected:" : "",
!streq(p, output) ? output : "");
assert_se(streq(p, output));
@ -157,6 +162,9 @@ TEST(calendar_spec_one) {
test_one("00:00:1.0..3.8", "*-*-* 00:00:01..03");
test_one("00:00:01..03", "*-*-* 00:00:01..03");
test_one("00:00:01/2,02..03", "*-*-* 00:00:01/2,02..03");
test_one("*:4,30:0..3", "*-*-* *:04,30:00..03");
test_one("*:4,30:0/1", "*-*-* *:04,30:*");
test_one("*:4,30:0/1,3,5", "*-*-* *:04,30:*");
test_one("*-*~1 Utc", "*-*~01 00:00:00 UTC");
test_one("*-*~05,3 ", "*-*~03,05 00:00:00");
test_one("*-*~* 00:00:00", "*-*-* 00:00:00");
@ -222,31 +230,34 @@ TEST(calendar_spec_next) {
TEST(calendar_spec_from_string) {
CalendarSpec *c;
assert_se(calendar_spec_from_string("test", &c) < 0);
assert_se(calendar_spec_from_string(" utc", &c) < 0);
assert_se(calendar_spec_from_string(" ", &c) < 0);
assert_se(calendar_spec_from_string("", &c) < 0);
assert_se(calendar_spec_from_string("7", &c) < 0);
assert_se(calendar_spec_from_string("121212:1:2", &c) < 0);
assert_se(calendar_spec_from_string("2000-03-05.23 00:00:00", &c) < 0);
assert_se(calendar_spec_from_string("2000-03-05 00:00.1:00", &c) < 0);
assert_se(calendar_spec_from_string("00:00:00/0.00000001", &c) < 0);
assert_se(calendar_spec_from_string("00:00:00.0..00.9", &c) < 0);
assert_se(calendar_spec_from_string("2016~11-22", &c) < 0);
assert_se(calendar_spec_from_string("*-*~5/5", &c) < 0);
assert_se(calendar_spec_from_string("Monday.. 12:00", &c) < 0);
assert_se(calendar_spec_from_string("Monday..", &c) < 0);
assert_se(calendar_spec_from_string("-00:+00/-5", &c) < 0);
assert_se(calendar_spec_from_string("00:+00/-5", &c) < 0);
assert_se(calendar_spec_from_string("2016- 11- 24 12: 30: 00", &c) < 0);
assert_se(calendar_spec_from_string("*~29", &c) < 0);
assert_se(calendar_spec_from_string("*~16..31", &c) < 0);
assert_se(calendar_spec_from_string("12..1/2-*", &c) < 0);
assert_se(calendar_spec_from_string("20/4:00", &c) < 0);
assert_se(calendar_spec_from_string("00:00/60", &c) < 0);
assert_se(calendar_spec_from_string("00:00:2300", &c) < 0);
assert_se(calendar_spec_from_string("00:00:18446744073709551615", &c) < 0);
assert_se(calendar_spec_from_string("test", &c) == -EINVAL);
assert_se(calendar_spec_from_string(" utc", &c) == -EINVAL);
assert_se(calendar_spec_from_string(" ", &c) == -EINVAL);
assert_se(calendar_spec_from_string("", &c) == -EINVAL);
assert_se(calendar_spec_from_string("7", &c) == -EINVAL);
assert_se(calendar_spec_from_string("121212:1:2", &c) == -EINVAL);
assert_se(calendar_spec_from_string("2000-03-05.23 00:00:00", &c) == -EINVAL);
assert_se(calendar_spec_from_string("2000-03-05 00:00.1:00", &c) == -EINVAL);
assert_se(calendar_spec_from_string("00:00:00/0.00000001", &c) == -ERANGE);
assert_se(calendar_spec_from_string("00:00:00.0..00.9", &c) == -EINVAL);
assert_se(calendar_spec_from_string("2016~11-22", &c) == -EINVAL);
assert_se(calendar_spec_from_string("*-*~5/5", &c) == -EINVAL);
assert_se(calendar_spec_from_string("Monday.. 12:00", &c) == -EINVAL);
assert_se(calendar_spec_from_string("Monday..", &c) == -EINVAL);
assert_se(calendar_spec_from_string("-00:+00/-5", &c) == -EINVAL);
assert_se(calendar_spec_from_string("00:+00/-5", &c) == -EINVAL);
assert_se(calendar_spec_from_string("2016- 11- 24 12: 30: 00", &c) == -EINVAL);
assert_se(calendar_spec_from_string("*~29", &c) == -EINVAL);
assert_se(calendar_spec_from_string("*~16..31", &c) == -EINVAL);
assert_se(calendar_spec_from_string("12..1/2-*", &c) == -EINVAL);
assert_se(calendar_spec_from_string("20/4:00", &c) == -EINVAL);
assert_se(calendar_spec_from_string("00:00/60", &c) == -EINVAL);
assert_se(calendar_spec_from_string("00:00:2300", &c) == -ERANGE);
assert_se(calendar_spec_from_string("00:00:18446744073709551615", &c) == -ERANGE);
assert_se(calendar_spec_from_string("@88588582097858858", &c) == -ERANGE);
assert_se(calendar_spec_from_string("*:4,30:*,5", &c) == -EINVAL);
assert_se(calendar_spec_from_string("*:4,30:5,*", &c) == -EINVAL);
assert_se(calendar_spec_from_string("*:4,30:*\n", &c) == -EINVAL);
}
DEFINE_TEST_MAIN(LOG_INFO);

1
test/fuzz/fuzz-calendarspec/cant-parse-printed Normal file
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@ -0,0 +1 @@
*:4,30:0..5,0

BIN
test/fuzz/fuzz-calendarspec/corpus Normal file
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1
test/fuzz/fuzz-calendarspec/crash-parse-star-non-star Normal file
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@ -0,0 +1 @@
*:4,30:0/01,0

BIN
test/fuzz/fuzz-calendarspec/input1 Normal file
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1
test/fuzz/fuzz-calendarspec/print-loses-spec Normal file
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@ -0,0 +1 @@
*:4,30:0..3