Last commit made on 2021-06-18
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58b9046... by Florian Weimer on 2021-06-17

elf: Use _dl_catch_error from base namespace in dl-libc.c [BZ #27646]

dlerrror_run in elf/dl-libc.c needs to call GLRO (dl_catch_error)
from the base namespace, just like the exported dlerror

Fixes commit b2964eb1d9a6b8ab1250e8a881cf406182da5875 ("dlfcn:
Failures after dlmopen should not terminate process [BZ #24772]").

Backport notes: GLRO (dl_catch_error) is replaced with
_dl_catch_error_ptr to preserve _rtld_global_ro layout.

Reviewed-by: Siddhesh Poyarekar <email address hidden>
(cherry picked from commit c2059edce20c124d1a99f1a94cc52e83b77a917a)

8c06748... by Florian Weimer on 2021-06-01

Fix use of __pthread_attr_copy in mq_notify (bug 27896)

__pthread_attr_copy can fail and does not initialize the attribute
structure in that case.

If __pthread_attr_copy is never called and there is no allocated
attribute, pthread_attr_destroy should not be called, otherwise
there is a null pointer dereference in rt/tst-mqueue6.

Fixes commit 42d359350510506b87101cf77202fefcbfc790cb
("Use __pthread_attr_copy in mq_notify (bug 27896)").

Reviewed-by: Siddhesh Poyarekar <email address hidden>
(cherry picked from commit 217b6dc298156bdb0d6aea9ea93e7e394a5ff091)

4b6be91... by Andreas Schwab on 2021-05-27

Use __pthread_attr_copy in mq_notify (bug 27896)

Make a deep copy of the pthread attribute object to remove a potential
use-after-free issue.

(cherry picked from commit 42d359350510506b87101cf77202fefcbfc790cb)

f4cba6c... by Florian Weimer on 2021-04-21

dlfcn: Failures after dlmopen should not terminate process [BZ #15271]

Commit 9e78f6f6e7134a5f299cc8de77370218f8019237 ("Implement
_dl_catch_error, _dl_signal_error in [BZ #16628]") has the
side effect that distinct namespaces, as created by dlmopen, now have
separate implementations of the rtld exception mechanism. This means
that the call to _dl_catch_error from libdl in a secondary namespace
does not actually install an exception handler because the
thread-local variable catch_hook in the copy in the secondary
namespace is distinct from that of the base namepace. As a result, a
dlsym/dlopen/... failure in a secondary namespace terminates the process
with a dynamic linker error because it looks to the exception handler
mechanism as if no handler has been installed.

Backport notes: GLRO (dl_catch_error) is replaced with
_dl_catch_error_ptr to preserve _rtld_global_ro layout.

(cherry picked from commit b2964eb1d9a6b8ab1250e8a881cf406182da5875)

0ef0e6d... by Nicholas Piggin <email address hidden> on 2021-05-20

powerpc: Fix handling of scv return error codes [BZ #27892]

When using scv for templated ASM syscalls, current code interprets any
negative return value as error, but the only valid error codes are in
the range -4095..-1 according to the ABI.

This commit also fixes 'signal.gen.test' strace test, where the issue
was first identified.

Reviewed-by: Matheus Castanho <email address hidden>
(cherry picked from commit 7de36744ee1325f35d3fe0ca079dd33c40b12267)

3f5080a... by Florian Weimer on 2021-04-22

nptl: Do not build nptl/tst-pthread-gdb-attach as PIE

(cherry picked from commit 6f3e54d404cfe1ba7d1444e6dfcfd77b102d9287)

3678314... by Florian Weimer on 2021-04-22

nptl: Check for compatible GDB in nptl/tst-pthread-gdb-attach

Also do not clear the subprocess environment, in case running
GDB needs certain environment variables.

(cherry picked from commit f553dc066071a4465321fbc122bed8a75afd996b)

ea299b6... by Florian Weimer on 2021-04-21

nptl_db: Support different libpthread/ load orders (bug 27744)

libthread_db is loaded once GDB encounters libpthread, and at this
point, may not have been processed by GDB yet. As a result,
_rtld_global cannot be accessed by regular means from libthread_db.
To make this work until GDB can be fixed, acess _rtld_global through
a pointer stored in libpthread.

The new test does not reproduce bug 27744 with
--disable-hardcoded-path-in-tests, but is still a valid smoke test.
With --enable-hardcoded-path-in-tests, it is necessary to avoid
add-symbol-file because this can tickle a GDB bug.

Fixes commit 1daccf403b1bd86370eb94edca794dc106d02039 ("nptl: Move
stack list variables into _rtld_global").

Tested-by: Emil Velikov <email address hidden>
(cherry picked from commit a64afc225240b2b27129ccfb0516d7c958b98040)

162df87... by "H.J. Lu" <email address hidden> on 2021-04-22

x86: tst-cpu-features-supports.c: Update AMX check

Pass "amx-bf16", "amx-int8" and "amx-tile", instead of "amx_bf16",
"amx_int8" and "amx_tile", to __builtin_cpu_supports for GCC 11.

(cherry picked from commit 7fc9152e831fb24091c0ceabdcecb9b07dd29dd6)

12ff80b... by Szabolcs Nagy <email address hidden> on 2021-02-02

Remove PR_TAGGED_ADDR_ENABLE from sys/prctl.h

The value of PR_TAGGED_ADDR_ENABLE was incorrect in the installed
headers and the prctl command macros were missing that are needed
for it to be useful (PR_SET_TAGGED_ADDR_CTRL). Linux headers have
the definitions since 5.4 so it's widely available, we don't need
to repeat these definitions. The remaining definitions are from
Linux 5.10.

To build glibc with --enable-memory-tagging, Linux 5.4 headers and
binutils 2.33.1 or newer is needed.

Reviewed-by: DJ Delorie <email address hidden>
(cherry picked from commit f4596d9540021265a99697fceef8a434c47e8bcf)