glibc: Fix missing randomness in __gen_tempname

Backport the fix for glibc bug 32214.

The missing randomness in early boot may cause some systemd services
to fail when they occasionally try to create tempdirs like
/run/systemd/namespace-aaaaaa at the same time.
The error messages can contain things like
"Failed to set up mount namespacing".

(From OE-Core rev: 0bb6aa06db5bf2e89d1c499e84a0a8cedbd8f0a7)

Signed-off-by: Ola x Nilsson <olani@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/glibc/glibc/0024-Fix-missing-randomness-in-__gen_tempname-bug-32214.patch

@@ -0,0 +1,29 @@
+From 9d30d58c32fe9d5f8ec6cda79fb11159e6789bcf Mon Sep 17 00:00:00 2001
+From: Andreas Schwab <schwab@suse.de>
+Date: Wed, 25 Sep 2024 11:49:30 +0200
+Subject: [PATCH] Fix missing randomness in __gen_tempname (bug 32214)
+
+Make sure to update the random value also if getrandom fails.
+
+Fixes: 686d542025 ("posix: Sync tempname with gnulib")
+
+Upstream-Status: Backport [https://sourceware.org/git/?p=glibc.git;a=commit;h=5f62cf88c4530c11904482775b7582bd7f6d80d2]
+
+Signed-off-by: Ola x Nilsson <olani@axis.com>
+---
+ sysdeps/posix/tempname.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/sysdeps/posix/tempname.c b/sysdeps/posix/tempname.c
+index c00fe0c181..fc30958a0c 100644
+--- a/sysdeps/posix/tempname.c
++++ b/sysdeps/posix/tempname.c
+@@ -117,6 +117,8 @@ random_bits (random_value *r, random_value s)
+      succeed.  */
+ #if !_LIBC
+   *r = mix_random_values (v, clock ());
++#else
++  *r = v;
+ #endif
+   return false;
+ }

meta/recipes-core/glibc/glibc_2.40.bb

@@ -53,6 +53,7 @@ SRC_URI =  "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \
            file://0021-fix-create-thread-failed-in-unprivileged-process-BZ-.patch \
            file://0022-Avoid-hardcoded-build-time-paths-in-the-output-binar.patch \
            file://0023-tests-Skip-2-qemu-tests-that-can-hang-in-oe-selftest.patch \
+           file://0024-Fix-missing-randomness-in-__gen_tempname-bug-32214.patch \
 "
 S = "${WORKDIR}/git"
 B = "${WORKDIR}/build-${TARGET_SYS}"