diff --git a/glibc.spec b/glibc.spec
index 4d50737..73c1550 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,4 +1,4 @@
-%global glibcsrcdir glibc-2.35.9000-509-g3d9926663c
+%global glibcsrcdir glibc-2.35.9000-563-g999835533b
 %global glibcversion 2.35.9000
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
@@ -152,7 +152,7 @@ end}
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 20%{?dist}
+Release: 21%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -2175,6 +2175,64 @@ update_gconv_modules_cache ()
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Mon Jun 06 2022 Carlos O'Donell <carlos@redhat.com> - 2.35.9000-21
+- Auto-sync with upstream branch master,
+  commit 999835533bc60fbd0b0b65d2412a6742e5a54b9d:
+- socket: Fix mistyped define statement in socket/sys/socket.h (BZ #29225)
+- Declare timegm for ISO C2X
+- Add PT_AARCH64_MEMTAG_MTE from Linux 5.18 to elf.h
+- grep: egrep -> grep -E, fgrep -> grep -F
+- string.h: Fix boolean spelling in comments
+- elf: Add #include <errno.h> for use of E* constants.
+- elf: Add #include <sys/param.h> for MAX usage.
+- linux: Add process_mrelease
+- linux: Add process_madvise
+- linux: Set tst-pidfd-consts unsupported for kernels headers older than 5.10
+- testrun.sh: Support passing strace and valgrind arguments
+- Linux: Adjust struct rseq definition to current kernel version
+- iconv: Use 64 bit stat for gconv_parseconfdir (BZ# 29213)
+- catgets: Use 64 bit stat for __open_catalog (BZ# 29211)
+- inet: Use 64 bit stat for ruserpass (BZ# 29210)
+- socket: Use 64 bit stat for isfdtype (BZ# 29209)
+- posix: Use 64 bit stat for fpathconf (_PC_ASYNC_IO) (BZ# 29208)
+- posix: Use 64 bit stat for posix_fallocate fallback (BZ# 29207)
+- misc: Use 64 bit stat for getusershell (BZ# 29203)
+- misc: Use 64 bit stat for daemon (BZ# 29203)
+- linux: use statx for fstat if neither newfstatat nor fstatat64 is present
+- Add MADV_DONTNEED_LOCKED from Linux 5.18 to bits/mman-linux.h
+- Add HWCAP2_MTE3 from Linux 5.18 to AArch64 bits/hwcap.h
+- i686: Use generic sincosf implementation for SSE2 version
+- benchtests: Add workload name for sincosf
+- i686: Use generic sinf implementation for SSE2 version
+- i686: Use generic cosf implementation for SSE2 version
+- benchtests: Add workload name for cosf
+- x86_64: Optimize sincos where sin/cos is optimized (bug 29193)
+- manual: fix reference to source file
+- Add SOL_SMC from Linux 5.18 to bits/socket.h
+- elf: Remove _dl_skip_args
+- x86_64: Remove _dl_skip_args usage
+- sparc: Remove _dl_skip_args usage
+- sh: Remove _dl_skip_args usage
+- s390: Remove _dl_skip_args usage
+- riscv: Remove _dl_skip_args usage
+- nios2: Remove _dl_skip_args usage (BZ# 29187)
+- mips: Remove _dl_skip_args usage
+- microblaze: Remove _dl_skip_args usage
+- m68k: Remove _dl_skip_args usage
+- ia64: Remove _dl_skip_args usage
+- i686: Remove _dl_skip_args usage
+- hppa: Remove _dl_skip_args usage (BZ# 29165)
+- csky: Remove _dl_skip_args usage
+- arc: Remove _dl_skip_args usage
+- arm: Remove _dl_skip_args usage
+- alpha: Remove _dl_skip_args usage
+- benchtests: Improve benchtests for strstr, memmem, and memchr
+- dlsym: Make RTLD_NEXT prefer default version definition [BZ #14932]
+- x86-64: Ignore r_addend for R_X86_64_GLOB_DAT/R_X86_64_JUMP_SLOT
+- x86_64: Implement evex512 version of strlen, strnlen, wcslen and wcsnlen
+- Update kernel version to 5.18 in header constant tests
+- String: Improve overflow test coverage for strnlen
+
 * Thu May 26 2022 Arjun Shankar <arjun@redhat.com> - 2.35.9000-20
 - Auto-sync with upstream branch master,
   commit 3d9926663cba19f40d26d8a8ab3b2a7cc09ffb13:
diff --git a/sources b/sources
index 6716d86..9ebc240 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.35.9000-509-g3d9926663c.tar.xz) = 0b2dea054aaf5b3ab7e4e1701ce9218ccf5158f234249fc677ea52755b3965349c4b4309fa37eb3e273d05c2747eec5e1ede90be836d657ee5636da75305dd26
+SHA512 (glibc-2.35.9000-563-g999835533b.tar.xz) = f3b5cdec3268c8a585b0c2bc1f1ee9c2ac8f9c09235dedb3b5aaeb74152b97395a7f4cc499d04e40eefa35d7553e03126f3107fb9a23dd1b6b2115140ae97035