From: Aram Sargsyan <aram@isc.org>
Date: Tue, 1 Apr 2025 13:36:33 +0000 (+0000)
Subject: Suppress FreeBSD-specific TSAN false-positive data race
X-Git-Tag: v9.18.36~4^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7495e64f87e87cfb8dd7649b8ec605ca71392ed4;p=thirdparty%2Fbind9.git

Suppress FreeBSD-specific TSAN false-positive data race

TSAN reports a data race in FreeBSD's memset(), called by its
__crt_calloc() memory allocation function. There is a very similar
bug report [1] in FreeBSD bug tracker, and an existing code-review [2]
that tries to address an issue, the description of which is very
similar to what we are seeing.

Suppress this report by adding its signature to '.tsan-suppress'.

[1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=282794
[2] https://reviews.freebsd.org/D28536?id=86694

(cherry picked from commit 40a91f51d72921d07d50c4315beb9ffa6d2dd577)
---

diff --git a/.tsan-suppress b/.tsan-suppress
index b12e03892f9..22ac7cb2c5e 100644
--- a/.tsan-suppress
+++ b/.tsan-suppress
@@ -1,2 +1,5 @@
 # Uninstrumented library.
 called_from_lib:libfstrm.so
+
+# FreeBSD false-positive, see GL#5267
+race:libexec/rtld-elf/rtld_malloc.c