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Code Issues Releases Activity

Fix some memory allocation errors:

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* jail_setv will leak a parameter name if jailparam_import fails.
* jailparam_all loses the jailparam pointer on realloc error
  (a clear freshman mistake).
* If jailparam_init fails, the caller doesn't need to jailparam_free
  the buffer.  That's not really clear, so set things to NULL allowing
  jailparam_free to work without error (though it's still not required).
This commit is contained in:
Jamie Gritton 2012-10-04 19:07:05 +00:00
parent 01591cd540
commit 49f903d5fc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=241197
1 changed files with 17 additions and 13 deletions
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30
lib/libjail/jail.c
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@ -85,19 +85,22 @@ jail_setv(int flags, ...)
(void)va_arg(tap, char *);
va_end(tap);
jp = alloca(njp * sizeof(struct jailparam));
for (njp = 0; (name = va_arg(ap, char *)) != NULL; njp++) {
for (njp = 0; (name = va_arg(ap, char *)) != NULL;) {
value = va_arg(ap, char *);
if (jailparam_init(jp + njp, name) < 0 ||
jailparam_import(jp + njp, value) < 0) {
jailparam_free(jp, njp);
va_end(ap);
return (-1);
}
if (jailparam_init(jp + njp, name) < 0)
goto error;
if (jailparam_import(jp + njp++, value) < 0)
goto error;
}
va_end(ap);
jid = jailparam_set(jp, njp, flags);
jailparam_free(jp, njp);
return (jid);
error:
jailparam_free(jp, njp);
va_end(ap);
return (-1);
}
/*
@ -195,7 +198,7 @@ jail_getv(int flags, ...)
int
jailparam_all(struct jailparam **jpp)
{
struct jailparam *jp;
struct jailparam *jp, *tjp;
size_t mlen1, mlen2, buflen;
int njp, nlist;
int mib1[CTL_MAXNAME], mib2[CTL_MAXNAME - 2];
@ -242,11 +245,10 @@ jailparam_all(struct jailparam **jpp)
/* Add the parameter to the list */
if (njp >= nlist) {
nlist *= 2;
jp = realloc(jp, nlist * sizeof(*jp));
if (jp == NULL) {
jailparam_free(jp, njp);
return (-1);
}
tjp = realloc(jp, nlist * sizeof(*jp));
if (tjp == NULL)
goto error;
jp = tjp;
}
if (jailparam_init(jp + njp, buf + sizeof(SJPARAM)) < 0)
goto error;
@ -277,6 +279,8 @@ jailparam_init(struct jailparam *jp, const char *name)
}
if (jailparam_type(jp) < 0) {
jailparam_free(jp, 1);
jp->jp_name = NULL;
jp->jp_value = NULL;
return (-1);
}
return (0);