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syslog: fix segfault in syslog_parse_priority()

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This commit is contained in:
Yu Watanabe 2018-08-08 18:27:15 +09:00
parent b9b8874f8f
commit a5ee33b951
2 changed files with 31 additions and 9 deletions
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20
src/basic/syslog-util.c
View File

@ -10,7 +10,8 @@
int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
int a = 0, b = 0, c = 0;
int k;
const char *end;
size_t k;
assert(p);
assert(*p);
@ -19,21 +20,22 @@ int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
if ((*p)[0] != '<')
return 0;
if (!strchr(*p, '>'))
end = strchr(*p, '>');
if (!end)
return 0;
if ((*p)[2] == '>') {
k = end - *p;
assert(k > 0);
if (k == 2)
c = undecchar((*p)[1]);
k = 3;
} else if ((*p)[3] == '>') {
else if (k == 3) {
b = undecchar((*p)[1]);
c = undecchar((*p)[2]);
k = 4;
} else if ((*p)[4] == '>') {
} else if (k == 4) {
a = undecchar((*p)[1]);
b = undecchar((*p)[2]);
c = undecchar((*p)[3]);
k = 5;
} else
return 0;
@ -46,7 +48,7 @@ int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
else
*priority = (*priority & LOG_FACMASK) | c;
*p += k;
*p += k + 1;
return 1;
}

20
src/journal/test-journal-syslog.c
View File

@ -4,6 +4,7 @@
#include "journald-syslog.h"
#include "macro.h"
#include "string-util.h"
#include "syslog-util.h"
static void test_syslog_parse_identifier(const char *str,
const char *ident, const char *pid, int ret) {
@ -18,6 +19,17 @@ static void test_syslog_parse_identifier(const char *str,
assert_se(pid == pid2 || streq_ptr(pid, pid2));
}
static void test_syslog_parse_priority(const char *str, int priority, int ret) {
const char *buf = str;
int priority2, ret2;
ret2 = syslog_parse_priority(&buf, &priority2, false);
assert_se(ret == ret2);
if (ret2 == 1)
assert_se(priority == priority2);
}
int main(void) {
test_syslog_parse_identifier("pidu[111]: xxx", "pidu", "111", 11);
test_syslog_parse_identifier("pidu: xxx", "pidu", NULL, 6);
@ -29,5 +41,13 @@ int main(void) {
test_syslog_parse_identifier("pidu: ", "pidu", NULL, 6);
test_syslog_parse_identifier("pidu : ", NULL, NULL, 0);
test_syslog_parse_priority("<>", 0, 0);
test_syslog_parse_priority("<>aaa", 0, 0);
test_syslog_parse_priority("<aaaa>", 0, 0);
test_syslog_parse_priority("<aaaa>aaa", 0, 0);
test_syslog_parse_priority(" <aaaa>", 0, 0);
test_syslog_parse_priority(" <aaaa>aaa", 0, 0);
/* TODO: add test cases of valid priorities */
return 0;
}