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getty: fix memory leak in parsing /etc/os-release

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Found by Coverity Scan.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2023-03-02 21:24:24 +01:00
parent 2eb3ebb404
commit f4d8ecfb5b
1 changed files with 23 additions and 24 deletions
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src/getty.c
+23 -24
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@@ -64,6 +64,16 @@ struct osrel {
static long logname_len = 32; /* useradd(1) limit at 32 chars */
static int passenv = 0; /* Set /bin/login -p or not */
static void get_val(char *line, const char *key, char *buf, size_t len)
{
char *val;
if ((val = fgetval(line, key, "="))) {
strlcpy(buf, val, len);
free(val);
}
}
/*
* Parse os-release
*/
@@ -80,32 +90,21 @@ static int osrel(struct osrel *rel)
return -1;
}
memset(rel->version, 0, sizeof(rel->version));
memset(codename, 0, sizeof(codename));
while ((line = fparseln(fp, NULL, NULL, NULL, 0))) {
char *val;
get_val(line, "NAME", rel->name, sizeof(rel->name));
get_val(line, "PRETTY_NAME", rel->pretty, sizeof(rel->pretty));
get_val(line, "ID", rel->id, sizeof(rel->id));
get_val(line, "VERSION", rel->version, sizeof(rel->version));
get_val(line, "VERSION_ID", rel->version_id, sizeof(rel->version_id));
get_val(line, "VERSION_CODENAME", codename, sizeof(codename));
get_val(line, "HOME_URL", rel->home_url, sizeof(rel->home_url));
get_val(line, "DOCUMENTATION_URL", rel->doc_url, sizeof(rel->doc_url));
get_val(line, "SUPPORT_URL", rel->support_url, sizeof(rel->support_url));
get_val(line, "BUG_REPORT_URL", rel->bug_url, sizeof(rel->bug_url));
if ((val = fgetval(line, "NAME", "=")))
strlcpy(rel->name, val, sizeof(rel->name));
if ((val = fgetval(line, "PRETTY_NAME", "=")))
strlcpy(rel->pretty, val, sizeof(rel->pretty));
if ((val = fgetval(line, "ID", "=")))
strlcpy(rel->id, val, sizeof(rel->id));
if ((val = fgetval(line, "VERSION", "=")))
strlcpy(rel->version, val, sizeof(rel->version));
if ((val = fgetval(line, "VERSION_ID", "=")))
strlcpy(rel->version_id, val, sizeof(rel->version_id));
if ((val = fgetval(line, "VERSION_CODENAME", "=")))
strlcpy(codename, val, sizeof(codename));
if ((val = fgetval(line, "HOME_URL", "=")))
strlcpy(rel->home_url, val, sizeof(rel->home_url));
if ((val = fgetval(line, "DOCUMENTATION_URL", "=")))
strlcpy(rel->doc_url, val, sizeof(rel->doc_url));
if ((val = fgetval(line, "SUPPORT_URL", "=")))
strlcpy(rel->support_url, val, sizeof(rel->support_url));
if ((val = fgetval(line, "BUG_REPORT_URL", "=")))
strlcpy(rel->bug_url, val, sizeof(rel->bug_url));
if (val)
free(val);
free(line);
}
fclose(fp);