diff --git a/glibc.spec b/glibc.spec
index 4d7bad5..6b5c599 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,4 +1,4 @@
-%global glibcsrcdir glibc-2.35.9000-44-g3d9f171bfb
+%global glibcsrcdir glibc-2.35.9000-83-gfdc1ae67fe
 %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: 3%{?dist}
+Release: 4%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -2175,6 +2175,49 @@ update_gconv_modules_cache ()
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Tue Feb 22 2022 Carlos O'Donell <carlos@redhat.com> - 2.35.9000-4
+- Auto-sync with upstream branch master,
+  commit fdc1ae67fef27eea1445bab4bdfe2f0fb3bc7aa1:
+- Add SOL_MPTCP, SOL_MCTP from Linux 5.16 to bits/socket.h
+- elf: Check invalid hole in PT_LOAD segments [BZ #28838]
+- realpath: Do not copy result on failure (BZ #28815)
+- x86: Fix TEST_NAME to make it a string in tst-strncmp-rtm.c
+- x86: Test wcscmp RTM in the wcsncmp overflow case [BZ #28896]
+- hppa: Fix swapcontext
+- x86: Fallback {str|wcs}cmp RTM in the ncmp overflow case [BZ #28896]
+- string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]
+- microblaze: Use the correct select syscall (BZ #28883)
+- Update kernel version to 5.16 in tst-mman-consts.py
+- pthread: Use 64 bit time_t stat internally for sem_open (BZ #28880)
+- x86: Fix bug in strncmp-evex and strncmp-avx2 [BZ #28895]
+- String: Strength memset tests in test-memset.c
+- x86-64: Define __memcmpeq in ld.so
+- htl: Destroy thread-specific data before releasing joins
+- htl: Fix initializing the key lock
+- mach: Fix LLL_SHARED value
+- htl: Make pthread_[gs]etspecific not check for key validity
+- x86-64: Remove bzero weak alias in SS2 memset
+- hppa: Fix typo
+- linux: Use socket-constants-time64.h on tst-socket-timestamp-compat
+- x86/configure.ac: Define PI_STATIC_AND_HIDDEN/SUPPORT_STATIC_PIE
+- Fix elf/tst-audit2 on hppa
+- x86: Use CHECK_FEATURE_PRESENT on PCONFIG
+- x86: Don't check PTWRITE in tst-cpu-features-cpuinfo.c
+- x86: Set .text section in memset-vec-unaligned-erms
+- Linux: Include <dl-auxv.h> in dl-sysdep.c only for SHARED
+- Revert "Linux: Consolidate auxiliary vector parsing"
+- String: Ensure 'MIN_PAGE_SIZE' is multiple of 'getpagesize'
+- Use binutils 2.38 branch in build-many-glibcs.py
+- elf: Remove LD_USE_LOAD_BIAS
+- malloc: Remove LD_TRACE_PRELINKING usage from mtrace
+- elf: Remove prelink support
+- Linux: Consolidate auxiliary vector parsing
+- Linux: Assume that NEED_DL_SYSINFO_DSO is always defined
+- Linux: Remove DL_FIND_ARG_COMPONENTS
+- Linux: Remove HAVE_AUX_SECURE, HAVE_AUX_XID, HAVE_AUX_PAGESIZE
+- elf: Merge dl-sysdep.c into the Linux version
+- hppa: Fix bind-now audit (BZ #28857)
+
 * Tue Feb 15 2022 Arjun Shankar <arjun@redhat.com> - 2.35.9000-3
 - Reduce installed size of some langpacks by de-duplicating LC_CTYPE
 
diff --git a/sources b/sources
index 2713b81..103eda0 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.35.9000-44-g3d9f171bfb.tar.xz) = 4a7bfc0e7ea7db66cf612d3a5df89ee044cc269769380085a4740ff815fa97c4113c76994103a9221a556284053b4cb2c6c7989b3367894b9aa2bdb63f05f6dc
+SHA512 (glibc-2.35.9000-83-gfdc1ae67fe.tar.xz) = 7678d3f762562097ab43bb087a6cd9768853071d9c393985bd060553f17fa0921fece50ab3dbda9984019b867d91ce9afa30c21899eeb58b6c3b9338453a1eba