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-rw-r--r--gnu/packages/patches/glibc-2.29-git-updates.patch742
1 files changed, 742 insertions, 0 deletions
diff --git a/gnu/packages/patches/glibc-2.29-git-updates.patch b/gnu/packages/patches/glibc-2.29-git-updates.patch
new file mode 100644
index 0000000000..5750e9cac1
--- /dev/null
+++ b/gnu/packages/patches/glibc-2.29-git-updates.patch
@@ -0,0 +1,742 @@
+This file tracks updates from the "release/2.29/master" branch:
+https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/release/2.29/master
+
+Abridged commits are appended to this file.
+
+From ec894251ef11723d10df04fcfd7bd2030c6e43ff Mon Sep 17 00:00:00 2001
+From: Carlos O'Donell <carlos@redhat.com>
+Date: Mon, 21 Jan 2019 22:50:12 -0500
+Subject: [PATCH] nptl: Fix pthread_rwlock_try*lock stalls (Bug 23844)
+diff --git a/nptl/pthread_rwlock_tryrdlock.c b/nptl/pthread_rwlock_tryrdlock.c
+index 368862ff07..2f94f17f36 100644
+--- a/nptl/pthread_rwlock_tryrdlock.c
++++ b/nptl/pthread_rwlock_tryrdlock.c
+@@ -94,15 +94,22 @@ __pthread_rwlock_tryrdlock (pthread_rwlock_t *rwlock)
+ /* Same as in __pthread_rwlock_rdlock_full:
+ We started the read phase, so we are also responsible for
+ updating the write-phase futex. Relaxed MO is sufficient.
+- Note that there can be no other reader that we have to wake
+- because all other readers will see the read phase started by us
+- (or they will try to start it themselves); if a writer started
+- the read phase, we cannot have started it. Furthermore, we
+- cannot discard a PTHREAD_RWLOCK_FUTEX_USED flag because we will
+- overwrite the value set by the most recent writer (or the readers
+- before it in case of explicit hand-over) and we know that there
+- are no waiting readers. */
+- atomic_store_relaxed (&rwlock->__data.__wrphase_futex, 0);
++ We have to do the same steps as a writer would when handing over the
++ read phase to use because other readers cannot distinguish between
++ us and the writer.
++ Note that __pthread_rwlock_tryrdlock callers will not have to be
++ woken up because they will either see the read phase started by us
++ or they will try to start it themselves; however, callers of
++ __pthread_rwlock_rdlock_full just increase the reader count and then
++ check what state the lock is in, so they cannot distinguish between
++ us and a writer that acquired and released the lock in the
++ meantime. */
++ if ((atomic_exchange_relaxed (&rwlock->__data.__wrphase_futex, 0)
++ & PTHREAD_RWLOCK_FUTEX_USED) != 0)
++ {
++ int private = __pthread_rwlock_get_private (rwlock);
++ futex_wake (&rwlock->__data.__wrphase_futex, INT_MAX, private);
++ }
+ }
+
+ return 0;
+diff --git a/nptl/pthread_rwlock_trywrlock.c b/nptl/pthread_rwlock_trywrlock.c
+index fd37a71ce4..fae475cc70 100644
+--- a/nptl/pthread_rwlock_trywrlock.c
++++ b/nptl/pthread_rwlock_trywrlock.c
+@@ -46,8 +46,15 @@ __pthread_rwlock_trywrlock (pthread_rwlock_t *rwlock)
+ &rwlock->__data.__readers, &r,
+ r | PTHREAD_RWLOCK_WRPHASE | PTHREAD_RWLOCK_WRLOCKED))
+ {
++ /* We have become the primary writer and we cannot have shared
++ the PTHREAD_RWLOCK_FUTEX_USED flag with someone else, so we
++ can simply enable blocking (see full wrlock code). */
+ atomic_store_relaxed (&rwlock->__data.__writers_futex, 1);
+- atomic_store_relaxed (&rwlock->__data.__wrphase_futex, 1);
++ /* If we started a write phase, we need to enable readers to
++ wait. If we did not, we must not change it because other threads
++ may have set the PTHREAD_RWLOCK_FUTEX_USED in the meantime. */
++ if ((r & PTHREAD_RWLOCK_WRPHASE) == 0)
++ atomic_store_relaxed (&rwlock->__data.__wrphase_futex, 1);
+ atomic_store_relaxed (&rwlock->__data.__cur_writer,
+ THREAD_GETMEM (THREAD_SELF, tid));
+ return 0;
+diff --git a/support/Makefile b/support/Makefile
+index 432cf2fe6c..c15b93647c 100644
+--- a/support/Makefile
++++ b/support/Makefile
+@@ -129,6 +129,7 @@ libsupport-routines = \
+ xpthread_mutexattr_settype \
+ xpthread_once \
+ xpthread_rwlock_init \
++ xpthread_rwlock_destroy \
+ xpthread_rwlock_rdlock \
+ xpthread_rwlock_unlock \
+ xpthread_rwlock_wrlock \
+diff --git a/support/xpthread_rwlock_destroy.c b/support/xpthread_rwlock_destroy.c
+new file mode 100644
+index 0000000000..6d6e953569
+--- /dev/null
++++ b/support/xpthread_rwlock_destroy.c
+@@ -0,0 +1,26 @@
++/* pthread_rwlock_destroy with error checking.
++ Copyright (C) 2019 Free Software Foundation, Inc.
++ This file is part of the GNU C Library.
++
++ The GNU C Library is free software; you can redistribute it and/or
++ modify it under the terms of the GNU Lesser General Public
++ License as published by the Free Software Foundation; either
++ version 2.1 of the License, or (at your option) any later version.
++
++ The GNU C Library is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
++ Lesser General Public License for more details.
++
++ You should have received a copy of the GNU Lesser General Public
++ License along with the GNU C Library; if not, see
++ <http://www.gnu.org/licenses/>. */
++
++#include <support/xthread.h>
++
++void
++xpthread_rwlock_destroy (pthread_rwlock_t *rwlock)
++{
++ xpthread_check_return ("pthread_rwlock_destroy",
++ pthread_rwlock_destroy (rwlock));
++}
+diff --git a/support/xthread.h b/support/xthread.h
+index 47c23235f3..9fe1f68b3b 100644
+--- a/support/xthread.h
++++ b/support/xthread.h
+@@ -84,6 +84,7 @@ void xpthread_rwlockattr_setkind_np (pthread_rwlockattr_t *attr, int pref);
+ void xpthread_rwlock_wrlock (pthread_rwlock_t *rwlock);
+ void xpthread_rwlock_rdlock (pthread_rwlock_t *rwlock);
+ void xpthread_rwlock_unlock (pthread_rwlock_t *rwlock);
++void xpthread_rwlock_destroy (pthread_rwlock_t *rwlock);
+
+ __END_DECLS
+
+From 44113a8ba24af23d7bbb174f9087a6b83a76289a Mon Sep 17 00:00:00 2001
+From: Stefan Liebler <stli@linux.ibm.com>
+Date: Thu, 7 Feb 2019 15:18:36 +0100
+Subject: [PATCH] Add compiler barriers around modifications of the robust
+ mutex list for pthread_mutex_trylock. [BZ #24180]
+diff --git a/nptl/pthread_mutex_trylock.c b/nptl/pthread_mutex_trylock.c
+index 8fe43b8f0f..bf2869eca2 100644
+--- a/nptl/pthread_mutex_trylock.c
++++ b/nptl/pthread_mutex_trylock.c
+@@ -94,6 +94,9 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ case PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP:
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+ &mutex->__data.__list.__next);
++ /* We need to set op_pending before starting the operation. Also
++ see comments at ENQUEUE_MUTEX. */
++ __asm ("" ::: "memory");
+
+ oldval = mutex->__data.__lock;
+ do
+@@ -119,7 +122,12 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ /* But it is inconsistent unless marked otherwise. */
+ mutex->__data.__owner = PTHREAD_MUTEX_INCONSISTENT;
+
++ /* We must not enqueue the mutex before we have acquired it.
++ Also see comments at ENQUEUE_MUTEX. */
++ __asm ("" ::: "memory");
+ ENQUEUE_MUTEX (mutex);
++ /* We need to clear op_pending after we enqueue the mutex. */
++ __asm ("" ::: "memory");
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+ /* Note that we deliberately exist here. If we fall
+@@ -135,6 +143,8 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ int kind = PTHREAD_MUTEX_TYPE (mutex);
+ if (kind == PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP)
+ {
++ /* We do not need to ensure ordering wrt another memory
++ access. Also see comments at ENQUEUE_MUTEX. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+ NULL);
+ return EDEADLK;
+@@ -142,6 +152,8 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+
+ if (kind == PTHREAD_MUTEX_ROBUST_RECURSIVE_NP)
+ {
++ /* We do not need to ensure ordering wrt another memory
++ access. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+ NULL);
+
+@@ -160,6 +172,9 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ id, 0);
+ if (oldval != 0 && (oldval & FUTEX_OWNER_DIED) == 0)
+ {
++ /* We haven't acquired the lock as it is already acquired by
++ another owner. We do not need to ensure ordering wrt another
++ memory access. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+ return EBUSY;
+@@ -173,13 +188,20 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ if (oldval == id)
+ lll_unlock (mutex->__data.__lock,
+ PTHREAD_ROBUST_MUTEX_PSHARED (mutex));
++ /* FIXME This violates the mutex destruction requirements. See
++ __pthread_mutex_unlock_full. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+ return ENOTRECOVERABLE;
+ }
+ }
+ while ((oldval & FUTEX_OWNER_DIED) != 0);
+
++ /* We must not enqueue the mutex before we have acquired it.
++ Also see comments at ENQUEUE_MUTEX. */
++ __asm ("" ::: "memory");
+ ENQUEUE_MUTEX (mutex);
++ /* We need to clear op_pending after we enqueue the mutex. */
++ __asm ("" ::: "memory");
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+ mutex->__data.__owner = id;
+@@ -211,10 +233,15 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ }
+
+ if (robust)
+- /* Note: robust PI futexes are signaled by setting bit 0. */
+- THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
+- (void *) (((uintptr_t) &mutex->__data.__list.__next)
+- | 1));
++ {
++ /* Note: robust PI futexes are signaled by setting bit 0. */
++ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending,
++ (void *) (((uintptr_t) &mutex->__data.__list.__next)
++ | 1));
++ /* We need to set op_pending before starting the operation. Also
++ see comments at ENQUEUE_MUTEX. */
++ __asm ("" ::: "memory");
++ }
+
+ oldval = mutex->__data.__lock;
+
+@@ -223,12 +250,16 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ {
+ if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
+ {
++ /* We do not need to ensure ordering wrt another memory
++ access. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+ return EDEADLK;
+ }
+
+ if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
+ {
++ /* We do not need to ensure ordering wrt another memory
++ access. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+ /* Just bump the counter. */
+@@ -250,6 +281,9 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ {
+ if ((oldval & FUTEX_OWNER_DIED) == 0)
+ {
++ /* We haven't acquired the lock as it is already acquired by
++ another owner. We do not need to ensure ordering wrt another
++ memory access. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+ return EBUSY;
+@@ -270,6 +304,9 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ if (INTERNAL_SYSCALL_ERROR_P (e, __err)
+ && INTERNAL_SYSCALL_ERRNO (e, __err) == EWOULDBLOCK)
+ {
++ /* The kernel has not yet finished the mutex owner death.
++ We do not need to ensure ordering wrt another memory
++ access. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+ return EBUSY;
+@@ -287,7 +324,12 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ /* But it is inconsistent unless marked otherwise. */
+ mutex->__data.__owner = PTHREAD_MUTEX_INCONSISTENT;
+
++ /* We must not enqueue the mutex before we have acquired it.
++ Also see comments at ENQUEUE_MUTEX. */
++ __asm ("" ::: "memory");
+ ENQUEUE_MUTEX (mutex);
++ /* We need to clear op_pending after we enqueue the mutex. */
++ __asm ("" ::: "memory");
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+
+ /* Note that we deliberately exit here. If we fall
+@@ -310,13 +352,20 @@ __pthread_mutex_trylock (pthread_mutex_t *mutex)
+ PTHREAD_ROBUST_MUTEX_PSHARED (mutex)),
+ 0, 0);
+
++ /* To the kernel, this will be visible after the kernel has
++ acquired the mutex in the syscall. */
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+ return ENOTRECOVERABLE;
+ }
+
+ if (robust)
+ {
++ /* We must not enqueue the mutex before we have acquired it.
++ Also see comments at ENQUEUE_MUTEX. */
++ __asm ("" ::: "memory");
+ ENQUEUE_MUTEX_PI (mutex);
++ /* We need to clear op_pending after we enqueue the mutex. */
++ __asm ("" ::: "memory");
+ THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
+ }
+
+From c096b008d2671028c21ac8cf01f18a2083e73c44 Mon Sep 17 00:00:00 2001
+From: Florian Weimer <fweimer@redhat.com>
+Date: Fri, 8 Feb 2019 12:54:41 +0100
+Subject: [PATCH] nptl: Avoid fork handler lock for async-signal-safe fork [BZ
+ #24161]
+--- a/nptl/register-atfork.c
++++ b/nptl/register-atfork.c
+@@ -107,13 +107,14 @@ __unregister_atfork (void *dso_handle)
+ }
+
+ void
+-__run_fork_handlers (enum __run_fork_handler_type who)
++__run_fork_handlers (enum __run_fork_handler_type who, _Bool do_locking)
+ {
+ struct fork_handler *runp;
+
+ if (who == atfork_run_prepare)
+ {
+- lll_lock (atfork_lock, LLL_PRIVATE);
++ if (do_locking)
++ lll_lock (atfork_lock, LLL_PRIVATE);
+ size_t sl = fork_handler_list_size (&fork_handlers);
+ for (size_t i = sl; i > 0; i--)
+ {
+@@ -133,7 +134,8 @@ __run_fork_handlers (enum __run_fork_handler_type who)
+ else if (who == atfork_run_parent && runp->parent_handler)
+ runp->parent_handler ();
+ }
+- lll_unlock (atfork_lock, LLL_PRIVATE);
++ if (do_locking)
++ lll_unlock (atfork_lock, LLL_PRIVATE);
+ }
+ }
+
+diff --git a/sysdeps/nptl/fork.c b/sysdeps/nptl/fork.c
+index bd68f18b45..14b69a6f89 100644
+--- a/sysdeps/nptl/fork.c
++++ b/sysdeps/nptl/fork.c
+@@ -55,7 +55,7 @@ __libc_fork (void)
+ but our current fork implementation is not. */
+ bool multiple_threads = THREAD_GETMEM (THREAD_SELF, header.multiple_threads);
+
+- __run_fork_handlers (atfork_run_prepare);
++ __run_fork_handlers (atfork_run_prepare, multiple_threads);
+
+ /* If we are not running multiple threads, we do not have to
+ preserve lock state. If fork runs from a signal handler, only
+@@ -134,7 +134,7 @@ __libc_fork (void)
+ __rtld_lock_initialize (GL(dl_load_lock));
+
+ /* Run the handlers registered for the child. */
+- __run_fork_handlers (atfork_run_child);
++ __run_fork_handlers (atfork_run_child, multiple_threads);
+ }
+ else
+ {
+@@ -149,7 +149,7 @@ __libc_fork (void)
+ }
+
+ /* Run the handlers registered for the parent. */
+- __run_fork_handlers (atfork_run_parent);
++ __run_fork_handlers (atfork_run_parent, multiple_threads);
+ }
+
+ return pid;
+diff --git a/sysdeps/nptl/fork.h b/sysdeps/nptl/fork.h
+index a1c3b26b68..99ed76034b 100644
+--- a/sysdeps/nptl/fork.h
++++ b/sysdeps/nptl/fork.h
+@@ -52,10 +52,12 @@ enum __run_fork_handler_type
+ - atfork_run_child: run all the CHILD_HANDLER and unlocks the internal
+ lock.
+ - atfork_run_parent: run all the PARENT_HANDLER and unlocks the internal
+- lock. */
+-extern void __run_fork_handlers (enum __run_fork_handler_type who)
+- attribute_hidden;
++ lock.
++
++ Perform locking only if DO_LOCKING. */
++extern void __run_fork_handlers (enum __run_fork_handler_type who,
++ _Bool do_locking) attribute_hidden;
+
+ /* C library side function to register new fork handlers. */
+ extern int __register_atfork (void (*__prepare) (void),
+
+From 067fc32968b601493f4b247a3ac00caeea3f3d61 Mon Sep 17 00:00:00 2001
+From: Florian Weimer <fweimer@redhat.com>
+Date: Fri, 15 Feb 2019 21:27:01 +0100
+Subject: [PATCH] nptl: Fix invalid Systemtap probe in pthread_join [BZ #24211]
+diff --git a/nptl/pthread_join_common.c b/nptl/pthread_join_common.c
+index ecb78ffba5..366feb376b 100644
+--- a/nptl/pthread_join_common.c
++++ b/nptl/pthread_join_common.c
+@@ -86,6 +86,7 @@ __pthread_timedjoin_ex (pthread_t threadid, void **thread_return,
+ pthread_cleanup_pop (0);
+ }
+
++ void *pd_result = pd->result;
+ if (__glibc_likely (result == 0))
+ {
+ /* We mark the thread as terminated and as joined. */
+@@ -93,7 +94,7 @@ __pthread_timedjoin_ex (pthread_t threadid, void **thread_return,
+
+ /* Store the return value if the caller is interested. */
+ if (thread_return != NULL)
+- *thread_return = pd->result;
++ *thread_return = pd_result;
+
+ /* Free the TCB. */
+ __free_tcb (pd);
+@@ -101,7 +102,7 @@ __pthread_timedjoin_ex (pthread_t threadid, void **thread_return,
+ else
+ pd->joinid = NULL;
+
+- LIBC_PROBE (pthread_join_ret, 3, threadid, result, pd->result);
++ LIBC_PROBE (pthread_join_ret, 3, threadid, result, pd_result);
+
+ return result;
+ }
+
+From bc6f839fb4066be83272c735e662850af2595777 Mon Sep 17 00:00:00 2001
+From: Stefan Liebler <stli@linux.ibm.com>
+Date: Wed, 13 Mar 2019 10:45:35 +0100
+Subject: [PATCH] Fix output of LD_SHOW_AUXV=1.
+diff --git a/elf/dl-sysdep.c b/elf/dl-sysdep.c
+index 5f6c679a3f..5d19b100b2 100644
+--- a/elf/dl-sysdep.c
++++ b/elf/dl-sysdep.c
+@@ -328,14 +328,9 @@ _dl_show_auxv (void)
+ assert (AT_NULL == 0);
+ assert (AT_IGNORE == 1);
+
+- if (av->a_type == AT_HWCAP || av->a_type == AT_HWCAP2
+- || AT_L1I_CACHEGEOMETRY || AT_L1D_CACHEGEOMETRY
+- || AT_L2_CACHEGEOMETRY || AT_L3_CACHEGEOMETRY)
+- {
+- /* These are handled in a special way per platform. */
+- if (_dl_procinfo (av->a_type, av->a_un.a_val) == 0)
+- continue;
+- }
++ /* Some entries are handled in a special way per platform. */
++ if (_dl_procinfo (av->a_type, av->a_un.a_val) == 0)
++ continue;
+
+ if (idx < sizeof (auxvars) / sizeof (auxvars[0])
+ && auxvars[idx].form != unknown)
+diff --git a/sysdeps/powerpc/dl-procinfo.h b/sysdeps/powerpc/dl-procinfo.h
+index f542f7318f..dfc3b33a72 100644
+--- a/sysdeps/powerpc/dl-procinfo.h
++++ b/sysdeps/powerpc/dl-procinfo.h
+@@ -225,7 +225,7 @@ _dl_procinfo (unsigned int type, unsigned long int word)
+ break;
+ }
+ default:
+- /* This should not happen. */
++ /* Fallback to generic output mechanism. */
+ return -1;
+ }
+ _dl_printf ("\n");
+diff --git a/sysdeps/sparc/dl-procinfo.h b/sysdeps/sparc/dl-procinfo.h
+index 282b8c5117..64ee267fc7 100644
+--- a/sysdeps/sparc/dl-procinfo.h
++++ b/sysdeps/sparc/dl-procinfo.h
+@@ -31,8 +31,8 @@ _dl_procinfo (unsigned int type, unsigned long int word)
+ {
+ int i;
+
+- /* Fallback to unknown output mechanism. */
+- if (type == AT_HWCAP2)
++ /* Fallback to generic output mechanism. */
++ if (type != AT_HWCAP)
+ return -1;
+
+ _dl_printf ("AT_HWCAP: ");
+diff --git a/sysdeps/unix/sysv/linux/arm/dl-procinfo.h b/sysdeps/unix/sysv/linux/arm/dl-procinfo.h
+index 66c00297b7..05c62c8687 100644
+--- a/sysdeps/unix/sysv/linux/arm/dl-procinfo.h
++++ b/sysdeps/unix/sysv/linux/arm/dl-procinfo.h
+@@ -67,7 +67,7 @@ _dl_procinfo (unsigned int type, unsigned long int word)
+ break;
+ }
+ default:
+- /* This should not happen. */
++ /* Fallback to generic output mechanism. */
+ return -1;
+ }
+ _dl_printf ("\n");
+diff --git a/sysdeps/unix/sysv/linux/i386/dl-procinfo.h b/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
+index 22b43431bc..0585cdaa9c 100644
+--- a/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
++++ b/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
+@@ -30,8 +30,8 @@ _dl_procinfo (unsigned int type, unsigned long int word)
+ in the kernel sources. */
+ int i;
+
+- /* Fallback to unknown output mechanism. */
+- if (type == AT_HWCAP2)
++ /* Fallback to generic output mechanism. */
++ if (type != AT_HWCAP)
+ return -1;
+
+ _dl_printf ("AT_HWCAP: ");
+diff --git a/sysdeps/unix/sysv/linux/s390/dl-procinfo.h b/sysdeps/unix/sysv/linux/s390/dl-procinfo.h
+index 19329a335b..d67fde368f 100644
+--- a/sysdeps/unix/sysv/linux/s390/dl-procinfo.h
++++ b/sysdeps/unix/sysv/linux/s390/dl-procinfo.h
+@@ -32,8 +32,8 @@ _dl_procinfo (unsigned int type, unsigned long int word)
+ in the kernel sources. */
+ int i;
+
+- /* Fallback to unknown output mechanism. */
+- if (type == AT_HWCAP2)
++ /* Fallback to generic output mechanism. */
++ if (type != AT_HWCAP)
+ return -1;
+
+ _dl_printf ("AT_HWCAP: ");
+
+From e28ad442e73b00ae2047d89c8cc7f9b2a0de5436 Mon Sep 17 00:00:00 2001
+From: TAMUKI Shoichi <tamuki@linet.gr.jp>
+Date: Sat, 2 Mar 2019 21:00:28 +0900
+Subject: [PATCH] ja_JP: Change the offset for Taisho gan-nen from 2 to 1 [BZ
+ #24162]
+diff --git a/localedata/locales/ja_JP b/localedata/locales/ja_JP
+index 1fd2fee44b..9bfbb2bb9b 100644
+--- a/localedata/locales/ja_JP
++++ b/localedata/locales/ja_JP
+@@ -14951,7 +14951,7 @@ era "+:2:1990//01//01:+*:<U5E73><U6210>:%EC%Ey<U5E74>";/
+ "+:2:1927//01//01:1989//01//07:<U662D><U548C>:%EC%Ey<U5E74>";/
+ "+:1:1926//12//25:1926//12//31:<U662D><U548C>:%EC<U5143><U5E74>";/
+ "+:2:1913//01//01:1926//12//24:<U5927><U6B63>:%EC%Ey<U5E74>";/
+- "+:2:1912//07//30:1912//12//31:<U5927><U6B63>:%EC<U5143><U5E74>";/
++ "+:1:1912//07//30:1912//12//31:<U5927><U6B63>:%EC<U5143><U5E74>";/
+ "+:6:1873//01//01:1912//07//29:<U660E><U6CBB>:%EC%Ey<U5E74>";/
+ "+:1:0001//01//01:1872//12//31:<U897F><U66A6>:%EC%Ey<U5E74>";/
+ "+:1:-0001//12//31:-*:<U7D00><U5143><U524D>:%EC%Ey<U5E74>"
+
+From 0941350c20a52447e53c5169354408e3db591f73 Mon Sep 17 00:00:00 2001
+From: TAMUKI Shoichi <tamuki@linet.gr.jp>
+Date: Tue, 2 Apr 2019 16:46:55 +0900
+Subject: [PATCH] ja_JP locale: Add entry for the new Japanese era [BZ #22964]
+diff --git a/localedata/locales/ja_JP b/localedata/locales/ja_JP
+index 9bfbb2bb9b..c64aaaff55 100644
+--- a/localedata/locales/ja_JP
++++ b/localedata/locales/ja_JP
+@@ -14946,7 +14946,9 @@ am_pm "<U5348><U524D>";"<U5348><U5F8C>"
+
+ t_fmt_ampm "%p%I<U6642>%M<U5206>%S<U79D2>"
+
+-era "+:2:1990//01//01:+*:<U5E73><U6210>:%EC%Ey<U5E74>";/
++era "+:2:2020//01//01:+*:<U4EE4><U548C>:%EC%Ey<U5E74>";/
++ "+:1:2019//05//01:2019//12//31:<U4EE4><U548C>:%EC<U5143><U5E74>";/
++ "+:2:1990//01//01:2019//04//30:<U5E73><U6210>:%EC%Ey<U5E74>";/
+ "+:1:1989//01//08:1989//12//31:<U5E73><U6210>:%EC<U5143><U5E74>";/
+ "+:2:1927//01//01:1989//01//07:<U662D><U548C>:%EC%Ey<U5E74>";/
+ "+:1:1926//12//25:1926//12//31:<U662D><U548C>:%EC<U5143><U5E74>";/
+
+From 52b7cd6e9a701bb203023d56e84551943dc6a4c0 Mon Sep 17 00:00:00 2001
+From: Adam Maris <amaris@redhat.com>
+Date: Thu, 14 Mar 2019 16:51:16 -0400
+Subject: [PATCH] malloc: Check for large bin list corruption when inserting
+ unsorted chunk
+diff --git a/malloc/malloc.c b/malloc/malloc.c
+index feaf7ee0bf..ce771375b6 100644
+--- a/malloc/malloc.c
++++ b/malloc/malloc.c
+@@ -3876,10 +3876,14 @@ _int_malloc (mstate av, size_t bytes)
+ {
+ victim->fd_nextsize = fwd;
+ victim->bk_nextsize = fwd->bk_nextsize;
++ if (__glibc_unlikely (fwd->bk_nextsize->fd_nextsize != fwd))
++ malloc_printerr ("malloc(): largebin double linked list corrupted (nextsize)");
+ fwd->bk_nextsize = victim;
+ victim->bk_nextsize->fd_nextsize = victim;
+ }
+ bck = fwd->bk;
++ if (bck->fd != fwd)
++ malloc_printerr ("malloc(): largebin double linked list corrupted (bk)");
+ }
+ }
+ else
+
+From c6177be4b92d5d7df50a785652d1912db511423e Mon Sep 17 00:00:00 2001
+From: Andreas Schwab <schwab@suse.de>
+Date: Wed, 15 May 2019 17:09:05 +0200
+Subject: [PATCH] Fix crash in _IO_wfile_sync (bug 20568)
+diff --git a/libio/wfileops.c b/libio/wfileops.c
+index 78f20486e5..bab2ba4892 100644
+--- a/libio/wfileops.c
++++ b/libio/wfileops.c
+@@ -508,11 +508,12 @@ _IO_wfile_sync (FILE *fp)
+ generate the wide characters up to the current reading
+ position. */
+ int nread;
+-
++ size_t wnread = (fp->_wide_data->_IO_read_ptr
++ - fp->_wide_data->_IO_read_base);
+ fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
+ nread = (*cv->__codecvt_do_length) (cv, &fp->_wide_data->_IO_state,
+ fp->_IO_read_base,
+- fp->_IO_read_end, delta);
++ fp->_IO_read_end, wnread);
+ fp->_IO_read_ptr = fp->_IO_read_base + nread;
+ delta = -(fp->_IO_read_end - fp->_IO_read_base - nread);
+ }
+
+From e3f828b8bd6e21922da8be8dee35edef09382d8d Mon Sep 17 00:00:00 2001
+From: Mark Wielaard <mark@klomp.org>
+Date: Wed, 15 May 2019 17:14:01 +0200
+Subject: [PATCH] dlfcn: Guard __dlerror_main_freeres with __libc_once_get
+ (once) [BZ#24476]
+diff --git a/dlfcn/dlerror.c b/dlfcn/dlerror.c
+index 27376582d0..ca42c126c1 100644
+--- a/dlfcn/dlerror.c
++++ b/dlfcn/dlerror.c
+@@ -72,9 +72,16 @@ __dlerror (void)
+ __libc_once (once, init);
+
+ /* Get error string. */
+- result = (struct dl_action_result *) __libc_getspecific (key);
+- if (result == NULL)
+- result = &last_result;
++ if (static_buf != NULL)
++ result = static_buf;
++ else
++ {
++ /* init () has been run and we don't use the static buffer.
++ So we have a valid key. */
++ result = (struct dl_action_result *) __libc_getspecific (key);
++ if (result == NULL)
++ result = &last_result;
++ }
+
+ /* Test whether we already returned the string. */
+ if (result->returned != 0)
+@@ -230,13 +237,19 @@ free_key_mem (void *mem)
+ void
+ __dlerror_main_freeres (void)
+ {
+- void *mem;
+ /* Free the global memory if used. */
+ check_free (&last_result);
+- /* Free the TSD memory if used. */
+- mem = __libc_getspecific (key);
+- if (mem != NULL)
+- free_key_mem (mem);
++
++ if (__libc_once_get (once) && static_buf == NULL)
++ {
++ /* init () has been run and we don't use the static buffer.
++ So we have a valid key. */
++ void *mem;
++ /* Free the TSD memory if used. */
++ mem = __libc_getspecific (key);
++ if (mem != NULL)
++ free_key_mem (mem);
++ }
+ }
+
+ struct dlfcn_hook *_dlfcn_hook __attribute__((nocommon));
+
+From 95d66fecaabbc92ab53027e808f0fc1929c9f21a Mon Sep 17 00:00:00 2001
+From: Wilco Dijkstra <wdijkstr@arm.com>
+Date: Fri, 10 May 2019 16:38:21 +0100
+Subject: [PATCH] Fix tcache count maximum (BZ #24531)
+diff --git a/malloc/malloc.c b/malloc/malloc.c
+index ce771375b6..0abd653be2 100644
+--- a/malloc/malloc.c
++++ b/malloc/malloc.c
+@@ -2919,6 +2919,8 @@ typedef struct tcache_perthread_struct
+ tcache_entry *entries[TCACHE_MAX_BINS];
+ } tcache_perthread_struct;
+
++#define MAX_TCACHE_COUNT 127 /* Maximum value of counts[] entries. */
++
+ static __thread bool tcache_shutting_down = false;
+ static __thread tcache_perthread_struct *tcache = NULL;
+
+@@ -5124,8 +5126,11 @@ static inline int
+ __always_inline
+ do_set_tcache_count (size_t value)
+ {
+- LIBC_PROBE (memory_tunable_tcache_count, 2, value, mp_.tcache_count);
+- mp_.tcache_count = value;
++ if (value <= MAX_TCACHE_COUNT)
++ {
++ LIBC_PROBE (memory_tunable_tcache_count, 2, value, mp_.tcache_count);
++ mp_.tcache_count = value;
++ }
+ return 1;
+ }
+
+From 34fb5f61d3c3f4b8fc616ea259fa19168b58ecd4 Mon Sep 17 00:00:00 2001
+From: "Dmitry V. Levin" <ldv@altlinux.org>
+Date: Wed, 13 Feb 2019 01:20:51 +0000
+Subject: [PATCH] libio: do not attempt to free wide buffers of legacy streams
+ [BZ #24228]
+diff --git a/libio/genops.c b/libio/genops.c
+index 2a0d9b81df..11a15549e8 100644
+--- a/libio/genops.c
++++ b/libio/genops.c
+@@ -789,9 +789,16 @@ _IO_unbuffer_all (void)
+
+ for (fp = (FILE *) _IO_list_all; fp; fp = fp->_chain)
+ {
++ int legacy = 0;
++
++#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
++ if (__glibc_unlikely (_IO_vtable_offset (fp) != 0))
++ legacy = 1;
++#endif
++
+ if (! (fp->_flags & _IO_UNBUFFERED)
+ /* Iff stream is un-orientated, it wasn't used. */
+- && fp->_mode != 0)
++ && (legacy || fp->_mode != 0))
+ {
+ #ifdef _IO_MTSAFE_IO
+ int cnt;
+@@ -805,7 +812,7 @@ _IO_unbuffer_all (void)
+ __sched_yield ();
+ #endif
+
+- if (! dealloc_buffers && !(fp->_flags & _IO_USER_BUF))
++ if (! legacy && ! dealloc_buffers && !(fp->_flags & _IO_USER_BUF))
+ {
+ fp->_flags |= _IO_USER_BUF;
+
+@@ -816,7 +823,7 @@ _IO_unbuffer_all (void)
+
+ _IO_SETBUF (fp, NULL, 0);
+
+- if (fp->_mode > 0)
++ if (! legacy && fp->_mode > 0)
+ _IO_wsetb (fp, NULL, NULL, 0);
+
+ #ifdef _IO_MTSAFE_IO
+@@ -827,7 +834,8 @@ _IO_unbuffer_all (void)
+
+ /* Make sure that never again the wide char functions can be
+ used. */
+- fp->_mode = -1;
++ if (! legacy)
++ fp->_mode = -1;
+ }
+
+ #ifdef _IO_MTSAFE_IO
+