From: Aydın Mercan <aydin@isc.org>
Date: Mon, 22 Jun 2026 07:05:02 +0000 (+0300)
Subject: fix: usr: ignore 0-byte reads in the TCP read callback
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d92030f7b20cab261285b4b25de409ea86af8a4f;p=thirdparty%2Fbind9.git

fix: usr: ignore 0-byte reads in the TCP read callback

Callbacks for libuv stream reads do not signal zero-length reads as a
failure signal but rather as EAGAIN/EWOULDBLOCK. This can trigger an
assertion when a zero-length read is pushed onto a PROXYv2 endpoint that
has not yet processed the headers as it expects a non-NULL region of
positive length.

Closes #6140

Merge branch '6140-proxyv2-assertion-on-zero-byte-read' into 'main'

See merge request isc-projects/bind9!12261
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d92030f7b20cab261285b4b25de409ea86af8a4f