diff --git a/glibc-rh2027789.patch b/glibc-rh2027789.patch
new file mode 100644
index 0000000..798d496
--- /dev/null
+++ b/glibc-rh2027789.patch
@@ -0,0 +1,23 @@
+Downstream-only patch from Mark Wielaard <mjw@redhat.com> to avoid a
+crash in backtrace if the vDSO is not available.
+
+Upstream, this code was removed in commit 82fd7314c7df8c5555dce02
+("powerpc: Remove backtrace implementation"), so patch is not needed
+there.
+
+diff --git a/sysdeps/powerpc/powerpc64/backtrace.c b/sysdeps/powerpc/powerpc64/backtrace.c
+index 37de9b5bdd73c316..0ffa7509dfa4862a 100644
+--- a/sysdeps/powerpc/powerpc64/backtrace.c
++++ b/sysdeps/powerpc/powerpc64/backtrace.c
+@@ -68,8 +68,9 @@ static inline bool
+ is_sigtramp_address (void *nip)
+ {
+ #ifdef HAVE_SIGTRAMP_RT64
+-  if (nip == GLRO (dl_vdso_sigtramp_rt64) ||
+-      nip == GLRO (dl_vdso_sigtramp_rt64) + 4)
++  if ((nip == GLRO (dl_vdso_sigtramp_rt64) ||
++       nip == GLRO (dl_vdso_sigtramp_rt64) + 4)
++      && nip != NULL)
+     return true;
+ #endif
+   return false;
diff --git a/glibc.spec b/glibc.spec
index 8d8b27b..cbf26de 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -151,7 +151,7 @@ end \
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 10%{?dist}
+Release: 11%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -280,6 +280,7 @@ Patch77: glibc-upstream-2.34-46.patch
 Patch78: glibc-upstream-2.34-47.patch
 Patch79: glibc-upstream-2.34-48.patch
 Patch80: glibc-upstream-2.34-49.patch
+Patch81: glibc-rh2027789.patch
 
 ##############################################################################
 # Continued list of core "glibc" package information:
@@ -2311,6 +2312,9 @@ fi
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Tue Dec  7 2021 Florian Weimer <fweimer@redhat.com> - 2.34-11
+- backtrace function crashes without vDSO on ppc64le (#2027789)
+
 * Fri Dec  3 2021 Florian Weimer <fweimer@redhat.com> - 2.34-10
 - Sync with upstream branch release/2.34/master,
   commit 387bff63dc2dccd62b09aa26dccf8cdc5f3c985c: