KumiSystems/openwrtv4
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

hotplug2: fix a memory leak and wrong variables leaking into the fork worker process (#12436, maybe also #12765)

Browse source 
SVN-Revision: 35857
This commit is contained in:
Felix Fietkau 2013-03-03 13:56:36 +00:00
parent 51e008284d
commit b58bd6e881
1 changed files with 24 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

37
package/hotplug2/patches/140-worker_fork_fix.patch
View file

@ -141,24 +141,34 @@
if (ctx->children[i]->busy == 0) {
child = ctx->children[i];
break;
@@ -406,21 +484,37 @@ static int worker_fork_process(void *in_
@@ -406,21 +484,40 @@ static int worker_fork_process(void *in_
* No child process is currently available.
*/
if (child == NULL) {
+ bool is_slow;
+
+ env = xmalloc(sizeof(char *) * node->uevent->env_vars_c);
+ for (i = 0; i < node->uevent->env_vars_c; i++) {
+ env[i] = alloc_env(node->uevent->env_vars[i].key, node->uevent->env_vars[i].value);
+ putenv(env[i]);
+ }
+
+ is_slow = !!(ruleset_flags(&ctx->settings->rules, node->uevent) & FLAG_MASK_SLOW);
+
+ for (i = 0; i < node->uevent->env_vars_c; i++) {
+ unsetenv(node->uevent->env_vars[i].key);
+ free(env[i]);
+ }
+ free(env);
+
/*
* Are the matching rules trivial enough that we
* can execute them in the main process?
*/
if (ctx->always_fork == 0 && ctx->settings->dumb == 0 &&
- if (ctx->always_fork == 0 && ctx->settings->dumb == 0 &&
- (ruleset_flags(&ctx->settings->rules, uevent) & FLAG_MASK_SLOW) == 0) {
- action_perform(ctx->settings, uevent);
+ (ruleset_flags(&ctx->settings->rules, node->uevent) & FLAG_MASK_SLOW) == 0) {
+ if (ctx->always_fork == 0 && ctx->settings->dumb == 0 && !is_slow) {
+ action_perform(ctx->settings, node->uevent);
+ walker = walker->next;
+ worker_fork_uevent_del(node);
@ -170,20 +180,13 @@
/*
* We have to fork off a new child.
*/
- if (ctx->children_count < ctx->max_children)
+ if (ctx->children_count < ctx->max_children ||
+ (ruleset_flags(&ctx->settings->rules, node->uevent) & FLAG_SLOW))
if (ctx->children_count < ctx->max_children)
child = worker_fork_spawn(ctx);
+
+ for (i = 0; i < node->uevent->env_vars_c; i++) {
+ unsetenv(node->uevent->env_vars[i].key);
+ free(env[i]);
+ }
+ free(env);
}
/*
@@ -428,9 +522,14 @@ static int worker_fork_process(void *in_
@@ -428,9 +525,14 @@ static int worker_fork_process(void *in_
*/
if (child != NULL) {
child->busy = 1;
@ -214,7 +217,15 @@
dest->plain_s = src->plain_s;
--- a/workers/worker_fork.h
+++ b/workers/worker_fork.h
@@ -35,4 +35,9 @@ struct worker_fork_ctx_t {
@@ -5,6 +5,7 @@
#include <sys/types.h>
#include <sys/select.h>
#include <unistd.h>
+#include <stdbool.h>
#include "../rules/execution.h"
@@ -35,4 +36,9 @@ struct worker_fork_ctx_t {
struct settings_t *settings;
};