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autofs/SOURCES/autofs-5.1.5-fix-macro-expansion-in-selector-values.patch
CentOS Sources 6eb0a2c83b import autofs-5.1.4-66.el8
2021-09-09 14:55:10 +00:00

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autofs-5.1.5 - fix macro expansion in selector values
From: Ian Kent <raven@themaw.net>
Macro expansion is not done in selector values before use, for example
in "hostd==${/key}.<donain>.<name>" the ${/key} is not expanded before
use leading to an attempt to use an invalid host name.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1
modules/parse_amd.c | 286 ++++++++++++++++++++++++++++++++++------------------
2 files changed, 193 insertions(+), 94 deletions(-)
--- autofs-5.1.4.orig/CHANGELOG
+++ autofs-5.1.4/CHANGELOG
@@ -52,6 +52,7 @@ xx/xx/2018 autofs-5.1.5
- log mount call arguments if mount_verbose is set.
- make expire remaining log level debug.
- allow period following macro in selector value.
+- fix macro expansion in selector values.
19/12/2017 autofs-5.1.4
- fix spec file url.
--- autofs-5.1.4.orig/modules/parse_amd.c
+++ autofs-5.1.4/modules/parse_amd.c
@@ -231,17 +231,29 @@ static struct substvar *add_lookup_vars(
return list;
}
-static int match_my_name(unsigned int logopt, const char *name, struct substvar *sv)
+static int match_my_name(struct autofs_point *ap, const char *name, struct substvar *sv)
{
struct addrinfo hints, *cni, *ni, *haddr;
char host[NI_MAXHOST + 1], numeric[NI_MAXHOST + 1];
+ unsigned int logopt = ap->logopt;
const struct substvar *v;
+ char *exp_name = NULL;
int rv = 0, ret;
+ if (!expand_selectors(ap, name, &exp_name, sv))
+ exp_name = strdup(name);
+ if (!exp_name) {
+ error(logopt,
+ MODPREFIX "error: failed to alloc space for name");
+ goto out;
+ }
+
v = macro_findvar(sv, "host", 4);
if (v) {
- if (!strcmp(v->val, name))
- return 1;
+ if (!strcmp(v->val, exp_name)) {
+ rv = 1;
+ goto out;
+ }
}
if (!v || !v->val) {
@@ -268,11 +280,11 @@ static int match_my_name(unsigned int lo
hints.ai_flags = AI_V4MAPPED | AI_ADDRCONFIG | AI_CANONNAME;
/* Resolve comparison name to its names and compare */
- ret = getaddrinfo(name, NULL, &hints, &ni);
+ ret = getaddrinfo(exp_name, NULL, &hints, &ni);
if (ret) {
error(logopt, MODPREFIX
"hostname lookup for %s failed: %s\n",
- name, gai_strerror(ret));
+ exp_name, gai_strerror(ret));
freeaddrinfo(cni);
goto out;
}
@@ -310,18 +322,180 @@ next:
freeaddrinfo(ni);
freeaddrinfo(cni);
out:
+ if (exp_name)
+ free(exp_name);
return rv;
}
-static int eval_selector(unsigned int logopt,
+static int sel_strcmp(struct autofs_point *ap,
+ const struct substvar *v, struct selector *s,
+ struct substvar *sv)
+{
+ char *expand = NULL;
+ int ret = 0;
+ int res;
+
+ res = expand_selectors(ap, s->comp.value, &expand, sv);
+ if (res)
+ res = strcmp(v->val, expand);
+ else
+ res = strcmp(v->val, s->comp.value);
+
+ if (s->compare & SEL_COMP_EQUAL && !res) {
+ debug(ap->logopt, MODPREFIX
+ "matched selector %s(%s) == %s",
+ v->def, v->val, expand ? expand : s->comp.value);
+ ret = 1;
+ } else if (s->compare & SEL_COMP_NOTEQUAL && res) {
+ debug(ap->logopt, MODPREFIX
+ "matched selector %s(%s) != %s",
+ v->def, v->val, expand ? expand : s->comp.value);
+ ret = 1;
+ } else
+ debug(ap->logopt, MODPREFIX
+ "did not match selector %s(%s) %s %s",
+ v->def, v->val,
+ (s->compare & SEL_COMP_EQUAL ? "==" : "!="),
+ expand ? expand : s->comp.value);
+
+ if (expand)
+ free(expand);
+
+ return ret;
+}
+
+static int sel_lstat(struct autofs_point *ap,
+ struct selector *s, struct substvar *sv)
+{
+ struct stat st;
+ char *expand = NULL;
+ int res, ret;
+
+ /* Sould be OK to fail on any error here */
+ res = expand_selectors(ap, s->func.arg1, &expand, sv);
+ if (res)
+ ret = !lstat(expand, &st);
+ else
+ ret = !lstat(s->func.arg1, &st);
+
+ if (s->compare == SEL_COMP_NOT)
+ ret = !ret;
+ if (ret)
+ debug(ap->logopt, MODPREFIX
+ "matched selector %s(%s)",
+ s->sel->name, expand ? expand : s->func.arg1);
+ else
+ debug(ap->logopt, MODPREFIX
+ "did not match selector %s(%s)",
+ s->sel->name, expand ? expand : s->func.arg1);
+ if (expand)
+ free(expand);
+
+ return ret;
+}
+
+static int sel_in_network(struct autofs_point *ap,
+ struct selector *s, struct substvar *sv)
+{
+ char *expand = NULL;
+ int res, ret;
+
+ res = expand_selectors(ap, s->func.arg1, &expand, sv);
+ if (!res)
+ ret = in_network(s->func.arg1);
+ else
+ ret = in_network(expand);
+
+ if (s->compare == SEL_COMP_NOT)
+ ret = !ret;
+ if (ret)
+ debug(ap->logopt, MODPREFIX
+ "matched selector %s(%s)",
+ s->sel->name, expand ? expand : s->func.arg1);
+ else
+ debug(ap->logopt, MODPREFIX
+ "did not match selector %s(%s)",
+ s->sel->name, expand ? expand : s->func.arg1);
+
+ if (expand)
+ free(expand);
+
+ return ret;
+}
+
+static int sel_netgrp(struct autofs_point *ap,
+ struct selector *s, struct substvar *sv)
+{
+ char *exp_arg1 = NULL, *exp_arg2 = NULL;
+ const struct substvar *v;
+ int res, ret = 0;
+ char *host;
+
+ if (s->func.arg2) {
+ res = expand_selectors(ap, s->func.arg2, &exp_arg2, sv);
+ if (res)
+ host = exp_arg2;
+ else
+ host = s->func.arg2;
+ } else {
+ if (s->sel->selector == SEL_NETGRP)
+ v = macro_findvar(sv, "host", 4);
+ else
+ v = macro_findvar(sv, "hostd", 5);
+ if (!v || !*v->val) {
+ error(ap->logopt, MODPREFIX
+ "failed to get value of ${host}");
+ goto out;
+ }
+ host = v->val;
+ }
+
+ res = expand_selectors(ap, s->func.arg1, &exp_arg1, sv);
+ if (res)
+ ret = innetgr(exp_arg1, host, NULL, NULL);
+ else
+ ret = innetgr(s->func.arg1, host, NULL, NULL);
+
+ if (s->compare == SEL_COMP_NOT)
+ ret = !ret;
+ if (ret) {
+ if (!s->func.arg2)
+ debug(ap->logopt, MODPREFIX
+ "matched selector %s(%s)",
+ s->sel->name, exp_arg1 ? exp_arg1 : s->func.arg1);
+ else
+ debug(ap->logopt, MODPREFIX
+ "matched selector %s(%s,%s)", s->sel->name,
+ exp_arg1 ? exp_arg1 : s->func.arg1,
+ exp_arg2 ? exp_arg2 : s->func.arg2);
+ } else {
+ if (!s->func.arg2)
+ debug(ap->logopt, MODPREFIX
+ "did not match selector %s(%s)",
+ s->sel->name, exp_arg1 ? exp_arg1 : s->func.arg1);
+ else
+ debug(ap->logopt, MODPREFIX
+ "did not match selector %s(%s,%s)", s->sel->name,
+ exp_arg1 ? exp_arg1 : s->func.arg1,
+ exp_arg2 ? exp_arg2 : s->func.arg2);
+ }
+out:
+ if (exp_arg1)
+ free(exp_arg1);
+ if (exp_arg2)
+ free(exp_arg2);
+
+ return ret;
+}
+
+static int eval_selector(struct autofs_point *ap,
struct amd_entry *this, struct substvar *sv)
{
struct selector *s = this->selector;
+ unsigned int logopt = ap->logopt;
const struct substvar *v;
unsigned int s_type;
unsigned int v_type;
- struct stat st;
- char *host;
int res, val, ret = 0;
s_type = s->sel->flags & SEL_FLAGS_TYPE_MASK;
@@ -339,26 +513,7 @@ static int eval_selector(unsigned int lo
switch (v_type) {
case SEL_FLAG_STR:
- res = strcmp(v->val, s->comp.value);
- if (s->compare & SEL_COMP_EQUAL && !res) {
- debug(logopt, MODPREFIX
- "matched selector %s(%s) == %s",
- v->def, v->val, s->comp.value);
- ret = 1;
- break;
- } else if (s->compare & SEL_COMP_NOTEQUAL && res) {
- debug(logopt, MODPREFIX
- "matched selector %s(%s) != %s",
- v->def, v->val, s->comp.value);
- ret = 1;
- break;
- }
-
- debug(logopt, MODPREFIX
- "did not match selector %s(%s) %s %s",
- v->def, v->val,
- (s->compare & SEL_COMP_EQUAL ? "==" : "!="),
- s->comp.value);
+ ret = sel_strcmp(ap, v, s, sv);
break;
case SEL_FLAG_NUM:
@@ -434,7 +589,7 @@ static int eval_selector(unsigned int lo
break;
case SEL_XHOST:
- ret = match_my_name(logopt, s->func.arg1, sv);
+ ret = match_my_name(ap, s->func.arg1, sv);
if (s->compare == SEL_COMP_NOT)
ret = !ret;
if (ret)
@@ -448,32 +603,11 @@ static int eval_selector(unsigned int lo
break;
case SEL_EXISTS:
- /* Sould be OK to fail on any error here */
- ret = !lstat(s->func.arg1, &st);
- if (s->compare == SEL_COMP_NOT)
- ret = !ret;
- if (ret)
- debug(logopt, MODPREFIX
- "matched selector %s(%s)",
- s->sel->name, s->func.arg1);
- else
- debug(logopt, MODPREFIX
- "did not match selector %s(%s)",
- s->sel->name, s->func.arg1);
+ ret = sel_lstat(ap, s, sv);
break;
case SEL_IN_NETWORK:
- ret = in_network(s->func.arg1);
- if (s->compare == SEL_COMP_NOT)
- ret = !ret;
- if (ret)
- debug(logopt, MODPREFIX
- "matched selector %s(%s)",
- s->sel->name, s->func.arg1);
- else
- debug(logopt, MODPREFIX
- "did not match selector %s(%s)",
- s->sel->name, s->func.arg1);
+ ret = sel_in_network(ap, s, sv);
break;
default:
@@ -492,43 +626,7 @@ static int eval_selector(unsigned int lo
switch (s->sel->selector) {
case SEL_NETGRP:
case SEL_NETGRPD:
- if (s->func.arg2)
- host = s->func.arg2;
- else {
- if (s->sel->selector == SEL_NETGRP)
- v = macro_findvar(sv, "host", 4);
- else
- v = macro_findvar(sv, "hostd", 5);
- if (!v || !*v->val) {
- error(logopt, MODPREFIX
- "failed to get value of ${host}");
- break;
- }
- host = v->val;
- }
- ret = innetgr(s->func.arg1, host, NULL, NULL);
- if (s->compare == SEL_COMP_NOT)
- ret = !ret;
- if (ret) {
- if (!s->func.arg2)
- debug(logopt, MODPREFIX
- "matched selector %s(%s)",
- s->sel->name, s->func.arg1);
- else
- debug(logopt, MODPREFIX
- "matched selector %s(%s,%s)",
- s->sel->name, s->func.arg1,
- s->func.arg2);
- } else {
- if (!s->func.arg2)
- debug(logopt, MODPREFIX
- "did not match selector %s(%s)",
- s->sel->name, s->func.arg1);
- else
- debug(logopt, MODPREFIX
- "did not match selector %s(%s,%s)",
- s->sel->name, s->func.arg1, s->func.arg2);
- }
+ ret = sel_netgrp(ap, s, sv);
break;
default:
@@ -1753,7 +1851,7 @@ static void update_prefix(struct autofs_
return;
}
-static int match_selectors(unsigned int logopt,
+static int match_selectors(struct autofs_point *ap,
struct amd_entry *entry, struct substvar *sv)
{
struct selector *s = entry->selector;
@@ -1761,7 +1859,7 @@ static int match_selectors(unsigned int
/* No selectors, always match */
if (!s) {
- debug(logopt, MODPREFIX "no selectors found in location");
+ debug(ap->logopt, MODPREFIX "no selectors found in location");
return 1;
}
@@ -1769,7 +1867,7 @@ static int match_selectors(unsigned int
/* All selectors must match */
while (s) {
- ret = eval_selector(logopt, entry, sv);
+ ret = eval_selector(ap, entry, sv);
if (!ret)
break;
s = s->next;
@@ -1939,7 +2037,7 @@ static struct amd_entry *select_default_
if (!this->selector)
continue;
- if (match_selectors(ap->logopt, this, sv)) {
+ if (match_selectors(ap, this, sv)) {
if (entry_default) {
/*update_with_defaults(entry_default, this, sv);*/
free_amd_entry(entry_default);
@@ -2192,7 +2290,7 @@ int parse_mount(struct autofs_point *ap,
break;
}
- if (!match_selectors(ap->logopt, this, sv))
+ if (!match_selectors(ap, this, sv))
continue;
at_least_one = 1;
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