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BUG/MAJOR: mux-fcgi: Stop sending loop if FCGI stream is blocked for any reason

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Because of a typo error in conditions to exit the sending loop, it is possible
to loop infinitely in fcgi_snd_buf() function. Instead of checking the FCGI
stream is not blocked to continue sending data, the FCGI connection is used. So
it is possible to have a stream blocked because there is not enough space in the
mux buffers to copy more data but continue to loop to send more data.

This patch should fix the issue #637. It must be backported to 2.1.
This commit is contained in:
Christopher Faulet 2020-05-19 15:13:00 +02:00
parent 2bdcc70fa7
commit fe410d685a
1 changed files with 1 additions and 1 deletions
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2
src/mux_fcgi.c
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@ -3931,7 +3931,7 @@ static size_t fcgi_snd_buf(struct conn_stream *cs, struct buffer *buf, size_t co
if (!(fstrm->flags & FCGI_SF_OUTGOING_DATA) && count)
fstrm->flags |= FCGI_SF_OUTGOING_DATA;
while (fstrm->state < FCGI_SS_HLOC && !(fconn->flags & FCGI_SF_BLK_ANY) &&
while (fstrm->state < FCGI_SS_HLOC && !(fstrm->flags & FCGI_SF_BLK_ANY) &&
count && !htx_is_empty(htx)) {
blk = htx_get_head_blk(htx);
ALREADY_CHECKED(blk);