diff --git a/glibc.spec b/glibc.spec
index ff5457c..a995577 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,5 +1,5 @@
-%define glibcsrcdir glibc-2.34
-%define glibcversion 2.34
+%define glibcsrcdir glibc-2.34.9000-36-g4cc79c2177
+%define glibcversion 2.34.9000
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
 #
@@ -2257,6 +2257,47 @@ fi
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Thu Aug 12 2021 Arjun Shankar <arjun@redhat.com> - 2.34.9000-1
+- Auto-sync with upstream branch master,
+  commit 4cc79c217744743077bf7a0ec5e0a4318f1e6641:
+- librt: add test (bug 28213)
+- mtrace: Use a static buffer for printing [BZ #25947]
+- hurd mmap: Reduce the requested max vmprot
+- hurd mmap: Factorize MAP_SHARED flag check
+- aarch64: Make elf_machine_{load_address,dynamic} robust [BZ #28203]
+- elf: Unconditionally use __ehdr_start
+- hurd: Add support for AT_NO_AUTOMOUNT
+- [5/5] AArch64: Improve A64FX memset medium loops
+- [4/5] AArch64: Improve A64FX memset by removing unroll32
+- [3/5] AArch64: Improve A64FX memset for remaining bytes
+- [2/5] AArch64: Improve A64FX memset for large sizes
+- [1/5] AArch64: Improve A64FX memset for small sizes
+- Use binutils 2.37 branch in build-many-glibcs.py
+- Add PTRACE_GET_RSEQ_CONFIGURATION from Linux 5.13 to sys/ptrace.h
+- librt: fix NULL pointer dereference (bug 28213)
+- powerpc64: Add checks for Altivec and VSX in ifunc selection
+- powerpc64: Check cacheline size before using optimised memset routines
+- powerpc64: Replace some PPC_FEATURE_HAS_VSX with PPC_FEATURE_ARCH_2_06
+- Linux: Fix fcntl, ioctl, prctl redirects for _TIME_BITS=64 (bug 28182)
+- Add INADDR_DUMMY from Linux 5.13 to netinet/in.h
+- tst-mxfast: Don't run with mcheck
+- rt: Set the correct message queue for tst-mqueue10
+- Update sparc libm-test-ulps
+- linux: Add sparck brk implementation
+- test-dlclose-exit-race: avoid hang on pthread_create error
+- gethosts: Remove unused argument _type
+- hurd: Avoid spurious warning
+- gaiconf_init: Avoid double-free in label and precedence lists
+- copy_and_spawn_sgid: Avoid double calls to close()
+- iconv_charmap: Close output file when done
+- gconv_parseconfdir: Fix memory leak
+- ldconfig: avoid leak on empty paths in config file
+- Fix build of nptl/tst-thread_local1.cc with GCC 12
+- nis: Fix leak on realloc failure in nis_getnames [BZ #28150]
+- Remove obsolete comments/name from several benchtest input files.
+- Remove obsolete comments/name from acos-inputs, since slow path was removed.
+- Open master branch for glibc 2.35 development
+
 * Mon Aug  2 2021 Florian Weimer <fweimer@redhat.com> - 2.34-1
 - Switch to glibc 2.34 release tarball:
 - Update ChangeLog.old/ChangeLog.23.
diff --git a/sources b/sources
index e59ed2f..7c27b6f 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.34.tar.xz) = 15252affd9ef4523a8001db16d497f4fdcb3ddf4cde7fe80e075df0bd3cc6524dc29fbe20229dbf5f97af580556e6b1fac0de321a5fe25322bc3e72f93beb624
+SHA512 (glibc-2.34.9000-36-g4cc79c2177.tar.xz) = 5e7ca14bef5506e7e2fe748d77335b8bdb3ed133fd7a3119400084b2c199e47f299e1d35c6baf673a28e881d79bca05403a9ca199aae7367d2979fa8256874a6