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httpd/SOURCES/httpd-2.4.37-CVE-2019-0211.patch
CentOS Sources b98ff77132 import httpd-2.4.37-12.module+el8.0.0+4096+eb40e6da
2021-09-10 10:58:53 +00:00

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diff --git a/include/scoreboard.h b/include/scoreboard.h
index 9376da2..92d198d 100644
--- a/include/scoreboard.h
+++ b/include/scoreboard.h
@@ -148,7 +148,9 @@ struct process_score {
apr_uint32_t lingering_close; /* async connections in lingering close */
apr_uint32_t keep_alive; /* async connections in keep alive */
apr_uint32_t suspended; /* connections suspended by some module */
- int bucket; /* Listener bucket used by this child */
+ int bucket; /* Listener bucket used by this child; this field is DEPRECATED
+ * and no longer updated by the MPMs (i.e. always zero).
+ */
};
/* Scoreboard is now in 'local' memory, since it isn't updated once created,
diff --git a/server/mpm/event/event.c b/server/mpm/event/event.c
index ffe8a23..048ae61 100644
--- a/server/mpm/event/event.c
+++ b/server/mpm/event/event.c
@@ -2695,7 +2695,6 @@ static int make_child(server_rec * s, int slot, int bucket)
ap_scoreboard_image->parent[slot].quiescing = 0;
ap_scoreboard_image->parent[slot].not_accepting = 0;
- ap_scoreboard_image->parent[slot].bucket = bucket;
event_note_child_started(slot, pid);
active_daemons++;
retained->total_daemons++;
@@ -2734,6 +2733,7 @@ static void perform_idle_server_maintenance(int child_bucket, int num_buckets)
* that threads_per_child is always > 0 */
int status = SERVER_DEAD;
int child_threads_active = 0;
+ int bucket = i % num_buckets;
if (i >= retained->max_daemons_limit &&
free_length == retained->idle_spawn_rate[child_bucket]) {
@@ -2757,7 +2757,7 @@ static void perform_idle_server_maintenance(int child_bucket, int num_buckets)
*/
if (status <= SERVER_READY && !ps->quiescing && !ps->not_accepting
&& ps->generation == retained->mpm->my_generation
- && ps->bucket == child_bucket)
+ && bucket == child_bucket)
{
++idle_thread_count;
}
@@ -2768,7 +2768,9 @@ static void perform_idle_server_maintenance(int child_bucket, int num_buckets)
last_non_dead = i;
}
active_thread_count += child_threads_active;
- if (!ps->pid && free_length < retained->idle_spawn_rate[child_bucket])
+ if (!ps->pid
+ && bucket == child_bucket
+ && free_length < retained->idle_spawn_rate[child_bucket])
free_slots[free_length++] = i;
else if (child_threads_active == threads_per_child)
had_healthy_child = 1;
@@ -2951,13 +2953,14 @@ static void server_main_loop(int remaining_children_to_start, int num_buckets)
retained->total_daemons--;
if (processed_status == APEXIT_CHILDSICK) {
/* resource shortage, minimize the fork rate */
- retained->idle_spawn_rate[ps->bucket] = 1;
+ retained->idle_spawn_rate[child_slot % num_buckets] = 1;
}
else if (remaining_children_to_start) {
/* we're still doing a 1-for-1 replacement of dead
* children with new children
*/
- make_child(ap_server_conf, child_slot, ps->bucket);
+ make_child(ap_server_conf, child_slot,
+ child_slot % num_buckets);
--remaining_children_to_start;
}
}
diff --git a/server/mpm/prefork/prefork.c b/server/mpm/prefork/prefork.c
index 8efda72..7c00625 100644
--- a/server/mpm/prefork/prefork.c
+++ b/server/mpm/prefork/prefork.c
@@ -637,8 +637,9 @@ static void child_main(int child_num_arg, int child_bucket)
}
-static int make_child(server_rec *s, int slot, int bucket)
+static int make_child(server_rec *s, int slot)
{
+ int bucket = slot % retained->mpm->num_buckets;
int pid;
if (slot + 1 > retained->max_daemons_limit) {
@@ -716,7 +717,6 @@ static int make_child(server_rec *s, int slot, int bucket)
child_main(slot, bucket);
}
- ap_scoreboard_image->parent[slot].bucket = bucket;
prefork_note_child_started(slot, pid);
return 0;
@@ -732,7 +732,7 @@ static void startup_children(int number_to_start)
if (ap_scoreboard_image->servers[i][0].status != SERVER_DEAD) {
continue;
}
- if (make_child(ap_server_conf, i, i % retained->mpm->num_buckets) < 0) {
+ if (make_child(ap_server_conf, i) < 0) {
break;
}
--number_to_start;
@@ -741,8 +741,6 @@ static void startup_children(int number_to_start)
static void perform_idle_server_maintenance(apr_pool_t *p)
{
- static int bucket_make_child_record = -1;
- static int bucket_kill_child_record = -1;
int i;
int idle_count;
worker_score *ws;
@@ -789,6 +787,7 @@ static void perform_idle_server_maintenance(apr_pool_t *p)
}
retained->max_daemons_limit = last_non_dead + 1;
if (idle_count > ap_daemons_max_free) {
+ static int bucket_kill_child_record = -1;
/* kill off one child... we use the pod because that'll cause it to
* shut down gracefully, in case it happened to pick up a request
* while we were counting
@@ -819,10 +818,7 @@ static void perform_idle_server_maintenance(apr_pool_t *p)
idle_count, total_non_dead);
}
for (i = 0; i < free_length; ++i) {
- bucket_make_child_record++;
- bucket_make_child_record %= retained->mpm->num_buckets;
- make_child(ap_server_conf, free_slots[i],
- bucket_make_child_record);
+ make_child(ap_server_conf, free_slots[i]);
}
/* the next time around we want to spawn twice as many if this
* wasn't good enough, but not if we've just done a graceful
@@ -867,7 +863,7 @@ static int prefork_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
if (one_process) {
AP_MONCONTROL(1);
- make_child(ap_server_conf, 0, 0);
+ make_child(ap_server_conf, 0);
/* NOTREACHED */
ap_assert(0);
return !OK;
@@ -976,8 +972,7 @@ static int prefork_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s)
/* we're still doing a 1-for-1 replacement of dead
* children with new children
*/
- make_child(ap_server_conf, child_slot,
- ap_get_scoreboard_process(child_slot)->bucket);
+ make_child(ap_server_conf, child_slot);
--remaining_children_to_start;
}
#if APR_HAS_OTHER_CHILD
diff --git a/server/mpm/worker/worker.c b/server/mpm/worker/worker.c
index 8012fe2..a927942 100644
--- a/server/mpm/worker/worker.c
+++ b/server/mpm/worker/worker.c
@@ -1339,7 +1339,6 @@ static int make_child(server_rec *s, int slot, int bucket)
worker_note_child_lost_slot(slot, pid);
}
ap_scoreboard_image->parent[slot].quiescing = 0;
- ap_scoreboard_image->parent[slot].bucket = bucket;
worker_note_child_started(slot, pid);
return 0;
}
@@ -1388,6 +1387,7 @@ static void perform_idle_server_maintenance(int child_bucket, int num_buckets)
int any_dead_threads = 0;
int all_dead_threads = 1;
int child_threads_active = 0;
+ int bucket = i % num_buckets;
if (i >= retained->max_daemons_limit &&
totally_free_length == retained->idle_spawn_rate[child_bucket]) {
@@ -1420,7 +1420,7 @@ static void perform_idle_server_maintenance(int child_bucket, int num_buckets)
if (status <= SERVER_READY &&
!ps->quiescing &&
ps->generation == retained->mpm->my_generation &&
- ps->bucket == child_bucket) {
+ bucket == child_bucket) {
++idle_thread_count;
}
if (status >= SERVER_READY && status < SERVER_GRACEFUL) {
@@ -1430,6 +1430,7 @@ static void perform_idle_server_maintenance(int child_bucket, int num_buckets)
}
active_thread_count += child_threads_active;
if (any_dead_threads
+ && bucket == child_bucket
&& totally_free_length < retained->idle_spawn_rate[child_bucket]
&& free_length < MAX_SPAWN_RATE / num_buckets
&& (!ps->pid /* no process in the slot */
@@ -1615,14 +1616,15 @@ static void server_main_loop(int remaining_children_to_start, int num_buckets)
ps->quiescing = 0;
if (processed_status == APEXIT_CHILDSICK) {
/* resource shortage, minimize the fork rate */
- retained->idle_spawn_rate[ps->bucket] = 1;
+ retained->idle_spawn_rate[child_slot % num_buckets] = 1;
}
else if (remaining_children_to_start
&& child_slot < ap_daemons_limit) {
/* we're still doing a 1-for-1 replacement of dead
* children with new children
*/
- make_child(ap_server_conf, child_slot, ps->bucket);
+ make_child(ap_server_conf, child_slot,
+ child_slot % num_buckets);
--remaining_children_to_start;
}
}
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