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import mod_http2-1.11.3-3.module+el8.1.0+4134+e6bad0ed

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CentOS Sources 2019-11-05 13:48:34 -05:00 committed by Andrew Lukoshko
commit 4a8c1a1438
4 changed files with 943 additions and 0 deletions
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1
.gitignore vendored Normal file
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SOURCES/mod_http2-1.11.3.tar.gz

1
.mod_http2.metadata Normal file
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24e1a05b7952a6afa85b76b0a477664d0b20734f SOURCES/mod_http2-1.11.3.tar.gz

833
SOURCES/httpd-2.4.34-CVE-2019-9511-and-9516-and-9517.patch Normal file
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diff --git a/mod_http2/h2_conn.c b/mod_http2/h2_conn.c
index 00d23c3..cb5bde7 100644
--- a/mod_http2/h2_conn.c
+++ b/mod_http2/h2_conn.c
@@ -235,6 +235,13 @@ apr_status_t h2_conn_run(struct h2_ctx *ctx, conn_rec *c)
case H2_SESSION_ST_BUSY:
case H2_SESSION_ST_WAIT:
c->cs->state = CONN_STATE_WRITE_COMPLETION;
+ if (c->cs && (session->open_streams || !session->remote.emitted_count)) {
+ /* let the MPM know that we are not done and want
+ * the Timeout behaviour instead of a KeepAliveTimeout
+ * See PR 63534.
+ */
+ c->cs->sense = CONN_SENSE_WANT_READ;
+ }
break;
case H2_SESSION_ST_CLEANUP:
case H2_SESSION_ST_DONE:
diff --git a/mod_http2/h2_filter.c b/mod_http2/h2_filter.c
index 241dcf0..05a470e 100644
--- a/mod_http2/h2_filter.c
+++ b/mod_http2/h2_filter.c
@@ -497,6 +497,52 @@ static apr_status_t status_event(void *ctx, h2_bucket_event event,
return APR_SUCCESS;
}
+static apr_status_t discard_body(request_rec *r, apr_off_t maxlen)
+{
+ apr_bucket_brigade *bb;
+ int seen_eos;
+ apr_status_t rv;
+
+ bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+ seen_eos = 0;
+ do {
+ apr_bucket *bucket;
+
+ rv = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES,
+ APR_BLOCK_READ, HUGE_STRING_LEN);
+
+ if (rv != APR_SUCCESS) {
+ apr_brigade_destroy(bb);
+ return rv;
+ }
+
+ for (bucket = APR_BRIGADE_FIRST(bb);
+ bucket != APR_BRIGADE_SENTINEL(bb);
+ bucket = APR_BUCKET_NEXT(bucket))
+ {
+ const char *data;
+ apr_size_t len;
+
+ if (APR_BUCKET_IS_EOS(bucket)) {
+ seen_eos = 1;
+ break;
+ }
+ if (bucket->length == 0) {
+ continue;
+ }
+ rv = apr_bucket_read(bucket, &data, &len, APR_BLOCK_READ);
+ if (rv != APR_SUCCESS) {
+ apr_brigade_destroy(bb);
+ return rv;
+ }
+ maxlen -= bucket->length;
+ }
+ apr_brigade_cleanup(bb);
+ } while (!seen_eos && maxlen >= 0);
+
+ return APR_SUCCESS;
+}
+
int h2_filter_h2_status_handler(request_rec *r)
{
h2_ctx *ctx = h2_ctx_rget(r);
@@ -515,8 +561,10 @@ int h2_filter_h2_status_handler(request_rec *r)
task = ctx? h2_ctx_get_task(ctx) : NULL;
if (task) {
-
- if ((status = ap_discard_request_body(r)) != OK) {
+ /* In this handler, we do some special sauce to send footers back,
+ * IFF we received footers in the request. This is used in our test
+ * cases, since CGI has no way of handling those. */
+ if ((status = discard_body(r, 1024)) != OK) {
return status;
}
diff --git a/mod_http2/h2_mplx.c b/mod_http2/h2_mplx.c
index a917077..e44d9ed 100644
--- a/mod_http2/h2_mplx.c
+++ b/mod_http2/h2_mplx.c
@@ -54,8 +54,12 @@ typedef struct {
h2_mplx *m;
h2_stream *stream;
apr_time_t now;
+ apr_size_t count;
} stream_iter_ctx;
+static apr_status_t mplx_be_happy(h2_mplx *m);
+static apr_status_t mplx_be_annoyed(h2_mplx *m);
+
apr_status_t h2_mplx_child_init(apr_pool_t *pool, server_rec *s)
{
(void)pool;
@@ -110,7 +114,7 @@ static void stream_input_consumed(void *ctx, h2_bucket_beam *beam, apr_off_t len
static void stream_joined(h2_mplx *m, h2_stream *stream)
{
- ap_assert(!stream->task || stream->task->worker_done);
+ ap_assert(!h2_task_has_started(stream->task) || stream->task->worker_done);
h2_ihash_remove(m->shold, stream->id);
h2_ihash_add(m->spurge, stream);
@@ -136,7 +140,7 @@ static void stream_cleanup(h2_mplx *m, h2_stream *stream)
h2_ififo_remove(m->readyq, stream->id);
h2_ihash_add(m->shold, stream);
- if (!stream->task || stream->task->worker_done) {
+ if (!h2_task_has_started(stream->task) || stream->task->done_done) {
stream_joined(m, stream);
}
else if (stream->task) {
@@ -219,7 +223,6 @@ h2_mplx *h2_mplx_create(conn_rec *c, apr_pool_t *parent,
m->stream_max_mem = (apr_size_t)h2_config_geti(conf, H2_CONF_STREAM_MAX_MEM);
m->streams = h2_ihash_create(m->pool, offsetof(h2_stream,id));
- m->sredo = h2_ihash_create(m->pool, offsetof(h2_stream,id));
m->shold = h2_ihash_create(m->pool, offsetof(h2_stream,id));
m->spurge = h2_ihash_create(m->pool, offsetof(h2_stream,id));
m->q = h2_iq_create(m->pool, m->max_streams);
@@ -233,8 +236,8 @@ h2_mplx *h2_mplx_create(conn_rec *c, apr_pool_t *parent,
m->workers = workers;
m->max_active = workers->max_workers;
m->limit_active = 6; /* the original h1 max parallel connections */
- m->last_limit_change = m->last_idle_block = apr_time_now();
- m->limit_change_interval = apr_time_from_msec(100);
+ m->last_mood_change = apr_time_now();
+ m->mood_update_interval = apr_time_from_msec(100);
m->spare_slaves = apr_array_make(m->pool, 10, sizeof(conn_rec*));
@@ -453,6 +456,10 @@ void h2_mplx_release_and_join(h2_mplx *m, apr_thread_cond_t *wait)
/* How to shut down a h2 connection:
* 1. cancel all streams still active */
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
+ "h2_mplx(%ld): release, %d/%d/%d streams (total/hold/purge), %d active tasks",
+ m->id, (int)h2_ihash_count(m->streams),
+ (int)h2_ihash_count(m->shold), (int)h2_ihash_count(m->spurge), m->tasks_active);
while (!h2_ihash_iter(m->streams, stream_cancel_iter, m)) {
/* until empty */
}
@@ -496,8 +503,7 @@ void h2_mplx_release_and_join(h2_mplx *m, apr_thread_cond_t *wait)
H2_MPLX_LEAVE(m);
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
- "h2_mplx(%ld): released", m->id);
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c, "h2_mplx(%ld): released", m->id);
}
apr_status_t h2_mplx_stream_cleanup(h2_mplx *m, h2_stream *stream)
@@ -736,7 +742,6 @@ static h2_task *next_stream_task(h2_mplx *m)
}
if (!stream->task) {
-
if (sid > m->max_stream_started) {
m->max_stream_started = sid;
}
@@ -755,9 +760,9 @@ static h2_task *next_stream_task(h2_mplx *m)
"create task"));
return NULL;
}
-
}
+ stream->task->started_at = apr_time_now();
++m->tasks_active;
return stream->task;
}
@@ -796,6 +801,8 @@ static void task_done(h2_mplx *m, h2_task *task, h2_req_engine *ngn)
/* this task was handed over to an engine for processing
* and the original worker has finished. That means the
* engine may start processing now. */
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
+ "h2_mplx(%ld): task(%s) done (frozen)", m->id, task->id);
h2_task_thaw(task);
apr_thread_cond_broadcast(m->task_thawed);
return;
@@ -835,35 +842,28 @@ static void task_done(h2_mplx *m, h2_task *task, h2_req_engine *ngn)
"h2_mplx(%s): request done, %f ms elapsed", task->id,
(task->done_at - task->started_at) / 1000.0);
- if (task->started_at > m->last_idle_block) {
- /* this task finished without causing an 'idle block', e.g.
- * a block by flow control.
- */
- if (task->done_at- m->last_limit_change >= m->limit_change_interval
- && m->limit_active < m->max_active) {
- /* Well behaving stream, allow it more workers */
- m->limit_active = H2MIN(m->limit_active * 2,
- m->max_active);
- m->last_limit_change = task->done_at;
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
- "h2_mplx(%ld): increase worker limit to %d",
- m->id, m->limit_active);
- }
+ if (task->c && !task->c->aborted && task->started_at > m->last_mood_change) {
+ mplx_be_happy(m);
}
+ ap_assert(task->done_done == 0);
+
stream = h2_ihash_get(m->streams, task->stream_id);
if (stream) {
/* stream not done yet. */
- if (!m->aborted && h2_ihash_get(m->sredo, stream->id)) {
+ if (!m->aborted && task->redo) {
/* reset and schedule again */
+ task->worker_done = 0;
h2_task_redo(task);
- h2_ihash_remove(m->sredo, stream->id);
h2_iq_add(m->q, stream->id, NULL, NULL);
+ ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, m->c,
+ H2_STRM_MSG(stream, "redo, added to q"));
}
else {
/* stream not cleaned up, stay around */
+ task->done_done = 1;
ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, m->c,
- H2_STRM_MSG(stream, "task_done, stream open"));
+ H2_STRM_MSG(stream, "task_done, stream open"));
if (stream->input) {
h2_beam_leave(stream->input);
}
@@ -874,6 +874,7 @@ static void task_done(h2_mplx *m, h2_task *task, h2_req_engine *ngn)
}
else if ((stream = h2_ihash_get(m->shold, task->stream_id)) != NULL) {
/* stream is done, was just waiting for this. */
+ task->done_done = 1;
ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, m->c,
H2_STRM_MSG(stream, "task_done, in hold"));
if (stream->input) {
@@ -898,8 +899,8 @@ void h2_mplx_task_done(h2_mplx *m, h2_task *task, h2_task **ptask)
{
H2_MPLX_ENTER_ALWAYS(m);
- task_done(m, task, NULL);
--m->tasks_active;
+ task_done(m, task, NULL);
if (m->join_wait) {
apr_thread_cond_signal(m->join_wait);
@@ -917,91 +918,161 @@ void h2_mplx_task_done(h2_mplx *m, h2_task *task, h2_task **ptask)
* h2_mplx DoS protection
******************************************************************************/
-static int latest_repeatable_unsubmitted_iter(void *data, void *val)
+static int timed_out_busy_iter(void *data, void *val)
{
stream_iter_ctx *ctx = data;
h2_stream *stream = val;
- if (stream->task && !stream->task->worker_done
- && h2_task_can_redo(stream->task)
- && !h2_ihash_get(ctx->m->sredo, stream->id)) {
- if (!h2_stream_is_ready(stream)) {
- /* this task occupies a worker, the response has not been submitted
- * yet, not been cancelled and it is a repeatable request
- * -> it can be re-scheduled later */
- if (!ctx->stream
- || (ctx->stream->task->started_at < stream->task->started_at)) {
- /* we did not have one or this one was started later */
- ctx->stream = stream;
- }
- }
+ if (h2_task_has_started(stream->task) && !stream->task->worker_done
+ && (ctx->now - stream->task->started_at) > stream->task->timeout) {
+ /* timed out stream occupying a worker, found */
+ ctx->stream = stream;
+ return 0;
}
return 1;
}
-static h2_stream *get_latest_repeatable_unsubmitted_stream(h2_mplx *m)
+static h2_stream *get_timed_out_busy_stream(h2_mplx *m)
{
stream_iter_ctx ctx;
ctx.m = m;
ctx.stream = NULL;
- h2_ihash_iter(m->streams, latest_repeatable_unsubmitted_iter, &ctx);
+ ctx.now = apr_time_now();
+ h2_ihash_iter(m->streams, timed_out_busy_iter, &ctx);
return ctx.stream;
}
-static int timed_out_busy_iter(void *data, void *val)
+static int latest_repeatable_unsubmitted_iter(void *data, void *val)
{
stream_iter_ctx *ctx = data;
h2_stream *stream = val;
- if (stream->task && !stream->task->worker_done
- && (ctx->now - stream->task->started_at) > stream->task->timeout) {
- /* timed out stream occupying a worker, found */
- ctx->stream = stream;
- return 0;
- }
+ if (!stream->task) goto leave;
+ if (!h2_task_has_started(stream->task) || stream->task->worker_done) goto leave;
+ if (h2_stream_is_ready(stream)) goto leave;
+ if (stream->task->redo) {
+ ++ctx->count;
+ goto leave;
+ }
+ if (h2_task_can_redo(stream->task)) {
+ /* this task occupies a worker, the response has not been submitted
+ * yet, not been cancelled and it is a repeatable request
+ * -> we could redo it later */
+ if (!ctx->stream
+ || (ctx->stream->task->started_at < stream->task->started_at)) {
+ /* we did not have one or this one was started later */
+ ctx->stream = stream;
+ }
+ }
+leave:
return 1;
}
-static h2_stream *get_timed_out_busy_stream(h2_mplx *m)
+static apr_status_t assess_task_to_throttle(h2_task **ptask, h2_mplx *m)
{
stream_iter_ctx ctx;
+
+ /* count the running tasks already marked for redo and get one that could
+ * be throttled */
+ *ptask = NULL;
+
ctx.m = m;
ctx.stream = NULL;
- ctx.now = apr_time_now();
- h2_ihash_iter(m->streams, timed_out_busy_iter, &ctx);
- return ctx.stream;
+
+ ctx.count = 0;
+ h2_ihash_iter(m->streams, latest_repeatable_unsubmitted_iter, &ctx);
+ if (m->tasks_active - ctx.count > m->limit_active) {
+ /* we are above the limit of running tasks, accounting for the ones
+ * already throttled. */
+ if (ctx.stream && ctx.stream->task) {
+ *ptask = ctx.stream->task;
+ return APR_EAGAIN;
+ }
+ /* above limit, be seeing no candidate for easy throttling */
+ if (get_timed_out_busy_stream(m)) {
+ /* Too many busy workers, unable to cancel enough streams
+ * and with a busy, timed out stream, we tell the client
+ * to go away... */
+ return APR_TIMEUP;
+ }
+ }
+ return APR_SUCCESS;
}
static apr_status_t unschedule_slow_tasks(h2_mplx *m)
{
- h2_stream *stream;
- long n;
+ h2_task *task;
+ apr_status_t rv;
/* Try to get rid of streams that occupy workers. Look for safe requests
* that are repeatable. If none found, fail the connection.
*/
- n = (m->tasks_active - m->limit_active - h2_ihash_count(m->sredo));
- while (n > 0 && (stream = get_latest_repeatable_unsubmitted_stream(m))) {
- h2_task_rst(stream->task, H2_ERR_CANCEL);
- h2_ihash_add(m->sredo, stream);
- --n;
+ while (APR_EAGAIN == (rv = assess_task_to_throttle(&task, m))) {
+ task->redo = 1;
+ h2_task_rst(task, H2_ERR_CANCEL);
}
- if ((m->tasks_active - h2_ihash_count(m->sredo)) > m->limit_active) {
- stream = get_timed_out_busy_stream(m);
- if (stream) {
- /* Too many busy workers, unable to cancel enough streams
- * and with a busy, timed out stream, we tell the client
- * to go away... */
- return APR_TIMEUP;
- }
+ return rv;
+}
+
+static apr_status_t mplx_be_happy(h2_mplx *m)
+{
+ apr_time_t now;
+
+ --m->irritations_since;
+ now = apr_time_now();
+ if (m->limit_active < m->max_active
+ && (now - m->last_mood_change >= m->mood_update_interval
+ || m->irritations_since < -m->limit_active)) {
+ m->limit_active = H2MIN(m->limit_active * 2, m->max_active);
+ m->last_mood_change = now;
+ m->irritations_since = 0;
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
+ "h2_mplx(%ld): mood update, increasing worker limit to %d",
+ m->id, m->limit_active);
}
return APR_SUCCESS;
}
+static apr_status_t mplx_be_annoyed(h2_mplx *m)
+{
+ apr_status_t status = APR_SUCCESS;
+ apr_time_t now;
+
+ ++m->irritations_since;
+ now = apr_time_now();
+ if (m->limit_active > 2 &&
+ ((now - m->last_mood_change >= m->mood_update_interval)
+ || (m->irritations_since >= m->limit_active))) {
+
+ if (m->limit_active > 16) {
+ m->limit_active = 16;
+ }
+ else if (m->limit_active > 8) {
+ m->limit_active = 8;
+ }
+ else if (m->limit_active > 4) {
+ m->limit_active = 4;
+ }
+ else if (m->limit_active > 2) {
+ m->limit_active = 2;
+ }
+ m->last_mood_change = now;
+ m->irritations_since = 0;
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
+ "h2_mplx(%ld): mood update, decreasing worker limit to %d",
+ m->id, m->limit_active);
+ }
+
+ if (m->tasks_active > m->limit_active) {
+ status = unschedule_slow_tasks(m);
+ }
+
+ return status;
+}
+
apr_status_t h2_mplx_idle(h2_mplx *m)
{
apr_status_t status = APR_SUCCESS;
- apr_time_t now;
apr_size_t scount;
H2_MPLX_ENTER(m);
@@ -1021,31 +1092,7 @@ apr_status_t h2_mplx_idle(h2_mplx *m)
* of busy workers we allow for this connection until it
* well behaves.
*/
- now = apr_time_now();
- m->last_idle_block = now;
- if (m->limit_active > 2
- && now - m->last_limit_change >= m->limit_change_interval) {
- if (m->limit_active > 16) {
- m->limit_active = 16;
- }
- else if (m->limit_active > 8) {
- m->limit_active = 8;
- }
- else if (m->limit_active > 4) {
- m->limit_active = 4;
- }
- else if (m->limit_active > 2) {
- m->limit_active = 2;
- }
- m->last_limit_change = now;
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
- "h2_mplx(%ld): decrease worker limit to %d",
- m->id, m->limit_active);
- }
-
- if (m->tasks_active > m->limit_active) {
- status = unschedule_slow_tasks(m);
- }
+ status = mplx_be_annoyed(m);
}
else if (!h2_iq_empty(m->q)) {
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, m->c,
@@ -1209,8 +1256,8 @@ void h2_mplx_req_engine_done(h2_req_engine *ngn, conn_rec *r_conn,
if (status != APR_SUCCESS && stream
&& h2_task_can_redo(task)
- && !h2_ihash_get(m->sredo, stream->id)) {
- h2_ihash_add(m->sredo, stream);
+ && !task->redo) {
+ task->redo = 1;
}
if (task->engine) {
@@ -1276,11 +1323,24 @@ int h2_mplx_awaits_data(h2_mplx *m)
if (h2_ihash_empty(m->streams)) {
waiting = 0;
}
- else if (!m->tasks_active && !h2_ififo_count(m->readyq)
- && h2_iq_empty(m->q)) {
+ else if (!m->tasks_active && !h2_ififo_count(m->readyq) && h2_iq_empty(m->q)) {
waiting = 0;
}
H2_MPLX_LEAVE(m);
return waiting;
}
+
+apr_status_t h2_mplx_client_rst(h2_mplx *m, int stream_id)
+{
+ h2_stream *stream;
+ apr_status_t status = APR_SUCCESS;
+
+ H2_MPLX_ENTER_ALWAYS(m);
+ stream = h2_ihash_get(m->streams, stream_id);
+ if (stream && stream->task) {
+ status = mplx_be_annoyed(m);
+ }
+ H2_MPLX_LEAVE(m);
+ return status;
+}
diff --git a/mod_http2/h2_mplx.h b/mod_http2/h2_mplx.h
index c267647..94e2cc8 100644
--- a/mod_http2/h2_mplx.h
+++ b/mod_http2/h2_mplx.h
@@ -65,7 +65,6 @@ struct h2_mplx {
unsigned int is_registered; /* is registered at h2_workers */
struct h2_ihash_t *streams; /* all streams currently processing */
- struct h2_ihash_t *sredo; /* all streams that need to be re-started */
struct h2_ihash_t *shold; /* all streams done with task ongoing */
struct h2_ihash_t *spurge; /* all streams done, ready for destroy */
@@ -79,10 +78,10 @@ struct h2_mplx {
apr_uint32_t tasks_active; /* # of tasks being processed from this mplx */
apr_uint32_t limit_active; /* current limit on active tasks, dynamic */
apr_uint32_t max_active; /* max, hard limit # of active tasks in a process */
- apr_time_t last_idle_block; /* last time, this mplx entered IDLE while
- * streams were ready */
- apr_time_t last_limit_change; /* last time, worker limit changed */
- apr_interval_time_t limit_change_interval;
+ apr_time_t last_mood_change; /* last time, we worker limit changed */
+ apr_interval_time_t mood_update_interval; /* how frequent we update at most */
+ int irritations_since; /* irritations (>0) or happy events (<0) since last mood change */
+
apr_thread_mutex_t *lock;
struct apr_thread_cond_t *added_output;
@@ -211,6 +210,8 @@ typedef int h2_mplx_stream_cb(struct h2_stream *s, void *ctx);
apr_status_t h2_mplx_stream_do(h2_mplx *m, h2_mplx_stream_cb *cb, void *ctx);
+apr_status_t h2_mplx_client_rst(h2_mplx *m, int stream_id);
+
/*******************************************************************************
* Output handling of streams.
******************************************************************************/
diff --git a/mod_http2/h2_session.c b/mod_http2/h2_session.c
index ed96cf0..6a33d69 100644
--- a/mod_http2/h2_session.c
+++ b/mod_http2/h2_session.c
@@ -390,9 +390,14 @@ static int on_frame_recv_cb(nghttp2_session *ng2s,
(int)frame->rst_stream.error_code);
stream = h2_session_stream_get(session, frame->hd.stream_id);
if (stream && stream->initiated_on) {
+ /* A stream reset on a request we sent it. Normal, when the
+ * client does not want it. */
++session->pushes_reset;
}
else {
+ /* A stream reset on a request it sent us. Could happen in a browser
+ * when the user navigates away or cancels loading - maybe. */
+ h2_mplx_client_rst(session->mplx, frame->hd.stream_id);
++session->streams_reset;
}
break;
@@ -1680,7 +1685,7 @@ static void transit(h2_session *session, const char *action, h2_session_state ns
* that already served requests - not fair. */
session->idle_sync_until = apr_time_now() + apr_time_from_sec(1);
s = "timeout";
- timeout = H2MAX(session->s->timeout, session->s->keep_alive_timeout);
+ timeout = session->s->timeout;
update_child_status(session, SERVER_BUSY_READ, "idle");
ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, session->c,
H2_SSSN_LOG("", session, "enter idle, timeout = %d sec"),
@@ -1688,8 +1693,8 @@ static void transit(h2_session *session, const char *action, h2_session_state ns
}
else if (session->open_streams) {
s = "timeout";
- timeout = session->s->keep_alive_timeout;
- update_child_status(session, SERVER_BUSY_KEEPALIVE, "idle");
+ timeout = session->s->timeout;
+ update_child_status(session, SERVER_BUSY_READ, "idle");
}
else {
/* normal keepalive setup */
@@ -2146,6 +2151,14 @@ apr_status_t h2_session_process(h2_session *session, int async)
session->have_read = 1;
}
else if (APR_STATUS_IS_EAGAIN(status) || APR_STATUS_IS_TIMEUP(status)) {
+ status = h2_mplx_idle(session->mplx);
+ if (status == APR_EAGAIN) {
+ break;
+ }
+ else if (status != APR_SUCCESS) {
+ dispatch_event(session, H2_SESSION_EV_CONN_ERROR,
+ H2_ERR_ENHANCE_YOUR_CALM, "less is more");
+ }
status = APR_EAGAIN;
goto out;
}
diff --git a/mod_http2/h2_stream.c b/mod_http2/h2_stream.c
index 24ebc56..8d7322a 100644
--- a/mod_http2/h2_stream.c
+++ b/mod_http2/h2_stream.c
@@ -398,13 +398,8 @@ apr_status_t h2_stream_send_frame(h2_stream *stream, int ftype, int flags, size_
/* start pushed stream */
ap_assert(stream->request == NULL);
ap_assert(stream->rtmp != NULL);
- status = h2_request_end_headers(stream->rtmp, stream->pool, 1, 0);
- if (status != APR_SUCCESS) {
- return status;
- }
- set_policy_for(stream, stream->rtmp);
- stream->request = stream->rtmp;
- stream->rtmp = NULL;
+ status = h2_stream_end_headers(stream, 1, 0);
+ if (status != APR_SUCCESS) goto leave;
break;
default:
@@ -416,6 +411,7 @@ apr_status_t h2_stream_send_frame(h2_stream *stream, int ftype, int flags, size_
if (status == APR_SUCCESS && eos) {
status = transit(stream, on_event(stream, H2_SEV_CLOSED_L));
}
+leave:
return status;
}
@@ -456,13 +452,8 @@ apr_status_t h2_stream_recv_frame(h2_stream *stream, int ftype, int flags, size_
* to abort the connection here, since this is clearly a protocol error */
return APR_EINVAL;
}
- status = h2_request_end_headers(stream->rtmp, stream->pool, eos, frame_len);
- if (status != APR_SUCCESS) {
- return status;
- }
- set_policy_for(stream, stream->rtmp);
- stream->request = stream->rtmp;
- stream->rtmp = NULL;
+ status = h2_stream_end_headers(stream, eos, frame_len);
+ if (status != APR_SUCCESS) goto leave;
}
break;
@@ -473,6 +464,7 @@ apr_status_t h2_stream_recv_frame(h2_stream *stream, int ftype, int flags, size_
if (status == APR_SUCCESS && eos) {
status = transit(stream, on_event(stream, H2_SEV_CLOSED_R));
}
+leave:
return status;
}
@@ -684,6 +676,8 @@ static apr_status_t add_trailer(h2_stream *stream,
hvalue = apr_pstrndup(stream->pool, value, vlen);
h2_util_camel_case_header(hname, nlen);
apr_table_mergen(stream->trailers, hname, hvalue);
+ ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c,
+ H2_STRM_MSG(stream, "added trailer '%s: %s'"), hname, hvalue);
return APR_SUCCESS;
}
@@ -703,15 +697,19 @@ apr_status_t h2_stream_add_header(h2_stream *stream,
if (name[0] == ':') {
if ((vlen) > session->s->limit_req_line) {
/* pseudo header: approximation of request line size check */
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, session->c,
- H2_STRM_MSG(stream, "pseudo %s too long"), name);
+ ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, session->c,
+ H2_STRM_LOG(APLOGNO(10178), stream,
+ "Request pseudo header exceeds "
+ "LimitRequestFieldSize: %s"), name);
error = HTTP_REQUEST_URI_TOO_LARGE;
}
}
else if ((nlen + 2 + vlen) > session->s->limit_req_fieldsize) {
/* header too long */
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, session->c,
- H2_STRM_MSG(stream, "header %s too long"), name);
+ ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, session->c,
+ H2_STRM_LOG(APLOGNO(10180), stream,"Request header exceeds "
+ "LimitRequestFieldSize: %.*s"),
+ (int)H2MIN(nlen, 80), name);
error = HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE;
}
@@ -723,8 +721,9 @@ apr_status_t h2_stream_add_header(h2_stream *stream,
h2_stream_rst(stream, H2_ERR_ENHANCE_YOUR_CALM);
return APR_ECONNRESET;
}
- ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, session->c,
- H2_STRM_MSG(stream, "too many header lines"));
+ ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, session->c,
+ H2_STRM_LOG(APLOGNO(10181), stream, "Number of request headers "
+ "exceeds LimitRequestFields"));
error = HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE;
}
@@ -755,6 +754,47 @@ apr_status_t h2_stream_add_header(h2_stream *stream,
return status;
}
+typedef struct {
+ apr_size_t maxlen;
+ const char *failed_key;
+} val_len_check_ctx;
+
+static int table_check_val_len(void *baton, const char *key, const char *value)
+{
+ val_len_check_ctx *ctx = baton;
+
+ if (strlen(value) <= ctx->maxlen) return 1;
+ ctx->failed_key = key;
+ return 0;
+}
+
+apr_status_t h2_stream_end_headers(h2_stream *stream, int eos, size_t raw_bytes)
+{
+ apr_status_t status;
+ val_len_check_ctx ctx;
+
+ status = h2_request_end_headers(stream->rtmp, stream->pool, eos, raw_bytes);
+ if (APR_SUCCESS == status) {
+ set_policy_for(stream, stream->rtmp);
+ stream->request = stream->rtmp;
+ stream->rtmp = NULL;
+
+ ctx.maxlen = stream->session->s->limit_req_fieldsize;
+ ctx.failed_key = NULL;
+ apr_table_do(table_check_val_len, &ctx, stream->request->headers, NULL);
+ if (ctx.failed_key) {
+ ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, stream->session->c,
+ H2_STRM_LOG(APLOGNO(), stream,"Request header exceeds "
+ "LimitRequestFieldSize: %.*s"),
+ (int)H2MIN(strlen(ctx.failed_key), 80), ctx.failed_key);
+ set_error_response(stream, HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE);
+ /* keep on returning APR_SUCCESS, so that we send a HTTP response and
+ * do not RST the stream. */
+ }
+ }
+ return status;
+}
+
static apr_bucket *get_first_headers_bucket(apr_bucket_brigade *bb)
{
if (bb) {
diff --git a/mod_http2/h2_stream.h b/mod_http2/h2_stream.h
index 7ecc0ad..79cb39d 100644
--- a/mod_http2/h2_stream.h
+++ b/mod_http2/h2_stream.h
@@ -198,6 +198,10 @@ apr_status_t h2_stream_set_request_rec(h2_stream *stream,
apr_status_t h2_stream_add_header(h2_stream *stream,
const char *name, size_t nlen,
const char *value, size_t vlen);
+
+/* End the contruction of request headers */
+apr_status_t h2_stream_end_headers(h2_stream *stream, int eos, size_t raw_bytes);
+
apr_status_t h2_stream_send_frame(h2_stream *stream, int frame_type, int flags, size_t frame_len);
apr_status_t h2_stream_recv_frame(h2_stream *stream, int frame_type, int flags, size_t frame_len);
diff --git a/mod_http2/h2_task.c b/mod_http2/h2_task.c
index 86fb026..1c01830 100644
--- a/mod_http2/h2_task.c
+++ b/mod_http2/h2_task.c
@@ -425,8 +425,15 @@ int h2_task_can_redo(h2_task *task) {
|| !strcmp("OPTIONS", task->request->method));
}
+int h2_task_has_started(h2_task *task)
+{
+ return task && task->started_at != 0;
+}
+
void h2_task_redo(h2_task *task)
{
+ task->started_at = 0;
+ task->worker_done = 0;
task->rst_error = 0;
}
@@ -565,7 +572,6 @@ apr_status_t h2_task_do(h2_task *task, apr_thread_t *thread, int worker_id)
ap_assert(task);
c = task->c;
task->worker_started = 1;
- task->started_at = apr_time_now();
if (c->master) {
/* Each conn_rec->id is supposed to be unique at a point in time. Since
diff --git a/mod_http2/h2_task.h b/mod_http2/h2_task.h
index ab6a746..56f6e0f 100644
--- a/mod_http2/h2_task.h
+++ b/mod_http2/h2_task.h
@@ -83,7 +83,10 @@ struct h2_task {
unsigned int frozen : 1;
unsigned int thawed : 1;
unsigned int worker_started : 1; /* h2_worker started processing */
- unsigned int worker_done : 1; /* h2_worker finished */
+ unsigned int redo : 1; /* was throttled, should be restarted later */
+
+ int worker_done; /* h2_worker finished */
+ int done_done; /* task_done has been handled */
apr_time_t started_at; /* when processing started */
apr_time_t done_at; /* when processing was done */
@@ -105,6 +108,7 @@ apr_status_t h2_task_do(h2_task *task, apr_thread_t *thread, int worker_id);
void h2_task_redo(h2_task *task);
int h2_task_can_redo(h2_task *task);
+int h2_task_has_started(h2_task *task);
/**
* Reset the task with the given error code, resets all input/output.

108
SPECS/mod_http2.spec Normal file
View File

@ -0,0 +1,108 @@
# Module Magic Number
%{!?_httpd_mmn: %global _httpd_mmn %(cat %{_includedir}/httpd/.mmn 2>/dev/null || echo 0-0)}
Name: mod_http2
Version: 1.11.3
Release: 3%{?dist}
Summary: module implementing HTTP/2 for Apache 2
Group: System Environment/Daemons
License: ASL 2.0
URL: https://icing.github.io/mod_h2/
Source0: https://github.com/icing/mod_h2/releases/download/v%{version}/mod_http2-%{version}.tar.gz
BuildRequires: pkgconfig, httpd-devel >= 2.4.20, libnghttp2-devel >= 1.7.0, openssl-devel >= 1.0.2
Requires: httpd-mmn = %{_httpd_mmn}
Conflicts: httpd < 2.4.25-8
# https://bugzilla.redhat.com/show_bug.cgi?id=1741860
# https://bugzilla.redhat.com/show_bug.cgi?id=1741864
# https://bugzilla.redhat.com/show_bug.cgi?id=1741868
Patch200: httpd-2.4.34-CVE-2019-9511-and-9516-and-9517.patch
%description
The mod_h2 Apache httpd module implements the HTTP2 protocol (h2+h2c) on
top of libnghttp2 for httpd 2.4 servers.
%prep
%setup -q
%patch200 -p1 -b .CVE-2019-9511-and-9516-and-9517
%build
%configure
make %{?_smp_mflags} V=1
%install
make DESTDIR=%{buildroot} install
rm -rf %{buildroot}/etc/httpd/share/doc/
# create configuration
mkdir -p %{buildroot}%{_httpd_modconfdir}
echo "LoadModule http2_module modules/mod_http2.so" > %{buildroot}%{_httpd_modconfdir}/10-h2.conf
echo "LoadModule proxy_http2_module modules/mod_proxy_http2.so" > %{buildroot}%{_httpd_modconfdir}/10-proxy_h2.conf
%check
make check
%files
%doc README README.md ChangeLog AUTHORS
%license LICENSE
%config(noreplace) %{_httpd_modconfdir}/10-h2.conf
%config(noreplace) %{_httpd_modconfdir}/10-proxy_h2.conf
%{_httpd_moddir}/mod_http2.so
%{_httpd_moddir}/mod_proxy_http2.so
%changelog
* Thu Aug 29 2019 Lubos Uhliarik <luhliari@redhat.com> - 1.11.3-3
- Resolves: #1744999 - CVE-2019-9511 httpd:2.4/mod_http2: HTTP/2: large amount
of data request leads to denial of service
- Resolves: #1745086 - CVE-2019-9516 httpd:2.4/mod_http2: HTTP/2: 0-length
headers leads to denial of service
- Resolves: #1745154 - CVE-2019-9517 httpd:2.4/mod_http2: HTTP/2: request for
large response leads to denial of service
* Thu Apr 4 2019 Joe Orton <jorton@redhat.com> - 1.11.3-2
- update release (#1695587)
* Tue Oct 16 2018 Lubos Uhliarik <luhliari@redhat.com> - 1.11.3-1
- new version 1.11.3
- Resolves: #1633401 - CVE-2018-11763 mod_http2: httpd: DoS for HTTP/2
connections by continuous SETTINGS
* Wed May 2 2018 Joe Orton <jorton@redhat.com> - 1.10.20-1
- update to 1.10.20
* Wed Apr 18 2018 Joe Orton <jorton@redhat.com> - 1.10.18-1
- update to 1.10.18
* Thu Mar 29 2018 Joe Orton <jorton@redhat.com> - 1.10.16-1
- update to 1.10.16 (CVE-2018-1302)
* Thu Feb 08 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.10.13-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
* Tue Nov 7 2017 Joe Orton <jorton@redhat.com> - 1.10.13-1
- update to 1.10.13
* Fri Oct 20 2017 Joe Orton <jorton@redhat.com> - 1.10.12-1
- update to 1.10.12
* Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.10.10-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild
* Mon Jul 31 2017 Joe Orton <jorton@redhat.com> - 1.10.10-1
- update to 1.10.10
* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.10.7-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
* Thu Jul 6 2017 Joe Orton <jorton@redhat.com> - 1.10.7-1
- update to 1.10.7
* Mon Jun 12 2017 Joe Orton <jorton@redhat.com> - 1.10.6-1
- update to 1.10.6
* Tue May 16 2017 Joe Orton <jorton@redhat.com> - 1.10.5-1
- update to 1.10.5
* Mon Apr 10 2017 Luboš Uhliarik <luhliari@redhat.com> - 1.10.1-1
- Initial import (#1440780).