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lxc-user-nic: dont risk passing EOF

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Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
This commit is contained in:
Serge Hallyn 2013-11-22 20:26:20 -06:00 committed by Stéphane Graber
parent 8cd80b50ef
commit 8f7b58d68f
1 changed files with 13 additions and 13 deletions
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26
src/lxc/lxc_user_nic.c
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@ -179,16 +179,16 @@ static int get_alloted(char *me, char *intype, char *link)
return -1;
}
static char *get_eol(char *s)
static char *get_eol(char *s, char *e)
{
while (*s && *s != '\n')
while (s<e && *s && *s != '\n')
s++;
return s;
}
static char *get_eow(char *s)
static char *get_eow(char *s, char *e)
{
while (*s && !isblank(*s) && *s != '\n')
while (s<e && *s && !isblank(*s) && *s != '\n')
s++;
return s;
}
@ -197,22 +197,22 @@ static char *find_line(char *p, char *e, char *u, char *t, char *l)
{
char *p1, *p2, *ret;
while (p < e && (p1 = get_eol(p)) < e) {
while (p<e && (p1 = get_eol(p, e)) < e) {
ret = p;
if (*p == '#')
goto next;
while (isblank(*p)) p++;
p2 = get_eow(p);
while (p<e && isblank(*p)) p++;
p2 = get_eow(p, e);
if (!p2 || p2-p != strlen(u) || strncmp(p, u, strlen(u)) != 0)
goto next;
p = p2+1;
while (isblank(*p)) p++;
p2 = get_eow(p);
while (p<e && isblank(*p)) p++;
p2 = get_eow(p, e);
if (!p2 || p2-p != strlen(t) || strncmp(p, t, strlen(t)) != 0)
goto next;
p = p2+1;
while (isblank(*p)) p++;
p2 = get_eow(p);
while (p<e && isblank(*p)) p++;
p2 = get_eow(p, e);
if (!p2 || p2-p != strlen(l) || strncmp(p, l, strlen(l)) != 0)
goto next;
return ret;
@ -659,7 +659,7 @@ static bool cull_entries(int fd, char *me, char *t, char *br)
}
entry_lines = newe;
entry_lines[n].start = p;
entry_lines[n].len = get_eol(p) - entry_lines[n].start;
entry_lines[n].len = get_eol(p, e) - entry_lines[n].start;
entry_lines[n].keep = true;
n++;
if (!get_nic_from_line(p, &nic))
@ -692,7 +692,7 @@ static int count_entries(char *buf, off_t len, char *me, char *t, char *br)
int count = 0;
while ((buf = find_line(buf, e, me, t, br)) != NULL) {
count++;
buf = get_eol(buf)+1;
buf = get_eol(buf, e)+1;
if (buf >= e)
break;
}