diff --git a/glibc.spec b/glibc.spec
index a995577..8e1fd21 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,4 +1,4 @@
-%define glibcsrcdir glibc-2.34.9000-36-g4cc79c2177
+%define glibcsrcdir glibc-2.34.9000-42-gb37b75d269
 %define glibcversion 2.34.9000
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
@@ -151,7 +151,7 @@ end \
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 1%{?dist}
+Release: 2%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -2257,6 +2257,17 @@ fi
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Tue Aug 17 2021 DJ Delorie <dj@redhat.com> - 2.34.9000-2
+- Auto-sync with upstream branch master,
+  commit b37b75d269883a2c553bb7019a813094eb4e2dd1.
+- x86_64: Simplify elf_machine_{load_address,dynamic}
+- elf: Drop elf/tls-macros.h in favor of __thread and tls_model attributes [BZ #28152] [BZ #28205]
+- hurd: Drop fmh kludge
+- time: Fix overflow itimer tests on 32-bit systems
+- mips: increase stack alignment in clone to match the ABI
+- mips: align stack in clone [BZ #28223]
+
+
 * Thu Aug 12 2021 Arjun Shankar <arjun@redhat.com> - 2.34.9000-1
 - Auto-sync with upstream branch master,
   commit 4cc79c217744743077bf7a0ec5e0a4318f1e6641:
diff --git a/sources b/sources
index 7c27b6f..4f7803b 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.34.9000-36-g4cc79c2177.tar.xz) = 5e7ca14bef5506e7e2fe748d77335b8bdb3ed133fd7a3119400084b2c199e47f299e1d35c6baf673a28e881d79bca05403a9ca199aae7367d2979fa8256874a6
+SHA512 (glibc-2.34.9000-42-gb37b75d269.tar.xz) = 397c96db5ca0b1eadc5a2c5fbf8eea6532b24b329da0fcbba2d6b878273c1aa5c67803db13bbfc92642071b5a2d07f685297b43053ef27ae3c6f4ca70d749cc3