From: Wilco Dijkstra <wilco.dijkstra@arm.com>
Date: Fri, 27 Jun 2025 14:10:55 +0000 (+0000)
Subject: AArch64: Avoid memset ifunc in cpu-features.c [BZ #33112]
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=681a24ae4d0cb8ed92de98b4da660308840b09ba;p=thirdparty%2Fglibc.git

AArch64: Avoid memset ifunc in cpu-features.c [BZ #33112]

During early startup memcpy or memset must not be called since many targets
use ifuncs for them which won't be initialized yet.  Security hardening may
use -ftrivial-auto-var-init=zero which inserts calls to memset.  Redirect
memset to memset_generic by including dl-symbol-redir-ifunc.h in cpu-features.c.
This fixes BZ #33112.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
---

diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
index 6d63c8a9ec..1acc82d077 100644
--- a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
+++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
@@ -23,6 +23,7 @@
 #include <sys/prctl.h>
 #include <sys/utsname.h>
 #include <dl-tunables-parse.h>
+#include <dl-symbol-redir-ifunc.h>
 
 #define DCZID_DZP_MASK (1 << 4)
 #define DCZID_BS_MASK (0xf)