diff --git a/glibc.spec b/glibc.spec
index 88aff45..3a86505 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,4 +1,4 @@
-%define glibcsrcdir glibc-2.33.9000-866-g7a5db2e82f
+%define glibcsrcdir glibc-2.33.9000-906-g72e84d1db2
 %define glibcversion 2.33.9000
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
@@ -111,7 +111,7 @@
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 39%{?dist}
+Release: 42%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -2068,6 +2068,21 @@ else
   io.stdout:write ("Error: Missing " .. iconv_cache .. " file.\n")
 end
 
+-- (5) On upgrades, restart systemd if installed.  "systemctl -q" does
+-- not suppress the error message (which is common in chroots), so
+-- open-code post_exec with standard error suppressed.
+if tonumber(arg[2]) >= 2
+   and posix.access("%{_prefix}/bin/systemctl", "x")
+then
+  local pid = posix.fork()
+  if pid == 0 then
+    posix.redirect2null(2)
+    assert(posix.exec("%{_prefix}/bin/systemctl", "daemon-reexec"))
+  elseif pid > 0 then
+    posix.wait(pid)
+  end
+end
+
 %posttrans all-langpacks -e -p <lua>
 -- The old glibc-all-langpacks postun scriptlet deleted the locale-archive
 -- file, so we may have to resurrect it on upgrades.
@@ -2207,6 +2222,59 @@ fi
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Tue Jul 13 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-42
+- Perform systemd re-exec even if glibc.i686 is installed
+
+* Tue Jul 13 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-41
+- Re-exec systemd on upgrades
+
+* Mon Jul 12 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-40
+- Merge files NSS service module into libc.
+- Restore vDSO acceleration for time functions on older kernels for i686.
+- Auto-sync with upstream branch master,
+  commit 72e84d1db22203e01a43268de71ea8669eca2863:
+- Linux: Use 32-bit vDSO for clock_gettime, gettimeofday, time (BZ# 28071)
+- Reduce <limits.h> pollution due to dynamic PTHREAD_STACK_MIN
+- Fix failing nss/tst-nss-files-hosts-long.
+- nis: nis_local_group may read from __nisgroup[-1] (bug 28075)
+- hurd _Fork: Drop duplicate malloc_fork_lock calls
+- support: Replace _SC_MINSIGSTKSZ with _SC_SIGSTKSZ
+- support: Replace MINSIGSTKSZ with sysconf (_SC_MINSIGSTKSZ)
+- Define PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN)
+- Force building with -fno-common
+- Add a generic malloc test for MALLOC_ALIGNMENT
+- Properly run tst-spawn5 directly [BZ #28067]
+- build-many-glibcs.py: Add glibcs-arm-linux-gnueabihf-thumb
+- nptl: Use out-of-line wake function in __libc_lock_unlock slow path
+- powerpc64le: Fix typo in configure
+- powerpc64: Remove strcspn ifunc from the loader
+- x86: Remove wcsnlen-sse4_1 from wcslen ifunc-impl-list [BZ #28064]
+- x86-64: Test strlen and wcslen with 0 in the RSI register [BZ #28064]
+- x86_64: Remove unneeded static PIE check for undefined weak diagnostic
+- Add NT_ARM_PAC_ENABLED_KEYS to elf.h
+- posix: Add posix_spawn_file_actions_addclosefrom_np
+- io: Add closefrom [BZ #10353]
+- linux: Add close_range
+- support: Add support_stack_alloc
+- _int_realloc is static
+- Move mcheck symbol from stdlib to malloc
+- nss: Do not install static linker input files for libnss_files
+- elf/tests: Make thrlock and noload depend on libm
+- Harden tcache double-free check
+- nss: Access nss_files through direct references
+- nss_files: Move into libc
+- nss_files: Add generic code for set*ent, end*ent and file open
+- nss_files: Allocate nscd file registration data on the heap
+- libio: Replace internal _IO_getdelim symbol with __getdelim
+- libio: Add hidden prototype for ungetc
+- inet: Add hidden prototype for __inet_network
+- Update MIPS libm-test-ulps
+- Update powerpc-nofpu libm-test-ulps
+- soft-fp: Add __extendhfsf2/__extendhfdf2, __truncsfhf2/__truncdfhf2,
+  __eqhf2/__nehf2
+- Update kernel version to 5.13 in tst-mman-consts.py
+- tests-exclude-mcheck: Fix typo
+
 * Wed Jul 07 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-39
 - Auto-sync with upstream branch master,
   commit 7a5db2e82fbb6c3a6e3fdae02b7166c5d0e8c7a8:
@@ -2305,10 +2373,10 @@ fi
 - Switch to new version of libthread_db .dynsym patch
 
 * Mon Jun 28 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-31
-- Further .symtab adjustment: Keep all __GI_* symbols (#1975859)
+- Further .symtab adjustment: Keep all __GI_* symbols (#1975895)
 
 * Mon Jun 28 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-30
-- Keep most of .symtab in libc.so.6 (#1975859)
+- Keep most of .symtab in libc.so.6 (#1975895)
 
 * Sun Jun 27 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-29
 - Apply emergency patch to fix iconvconfig corruption
diff --git a/sources b/sources
index 56ace92..5f03c72 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.33.9000-866-g7a5db2e82f.tar.xz) = 0af6093d139a3e410c9613fa2e974d3c010248145a1e658fbc748f5a3cc7daf0bef50ce494e7742c4f19331d88092754020c385fbff034634fcafefaa48e76dc
+SHA512 (glibc-2.33.9000-906-g72e84d1db2.tar.xz) = 9445eb2b819189975bb527058a9366b513c398210a2579daa9067e8c7149901db07d4f7f1b5f5fe175df109f5795a35f685600d86f9d19151934693760141a29