Commit Graph

24 Commits

Author SHA1 Message Date
Florian Weimer
c22553effb support: Prevent multiple deletion of temporary files
Otherwise, another user might recreate these files after the first
deletion.  Particularly with temporary directories, this could result
in the removal of unintended files through symbol link attacks.
2017-05-08 16:20:40 +02:00
Florian Weimer
706256afb6 support: Delete temporary files in LIFO order
This is required to remove temporary directories which contain
temporary files.  Previously, FIFO order meant that directory
removal was attempted when the directory still contained files,
which meant that temporary directory cleanup was essentially
unsupported.
2017-05-08 15:54:10 +02:00
Joseph Myers
9fe3c80c7c Fix sys/socket.h namespace issues from sys/uio.h inclusion (bug 21426).
sys/socket.h includes sys/uio.h to get the definition of the iovec
structure.

POSIX allows sys/socket.h to make all sys/uio.h symbols visible.
However, all of sys/uio.h is XSI-shaded, so for non-XSI POSIX this
results in conformtest failures (for sys/socket.h and other headers
that include it):

    Namespace violation: "UIO_MAXIOV"
    Namespace violation: "readv"
    Namespace violation: "writev"

Now, there is some ambiguity in POSIX about what namespace
reservations apply in this case - see
http://austingroupbugs.net/view.php?id=1127 - but glibc convention
would still avoid declaring readv and writev, for example, for feature
test macros that don't include them (if only headers from the relevant
standard are included), even if such declarations are permitted, so
there is a bug here according to glibc conventions.

This patch moves the struct iovec definition to a new
bits/types/struct_iovec.h header and includes that from sys/socket.h
instead of including the whole of sys/uio.h.  This fixes the namespace
issue; however, three files in glibc that were relying on the implicit
inclusion needed to be updated to include sys/uio.h explicitly.  So
there is a question of whether sys/socket.h should continue to include
sys/uio.h under some conditions, such as __USE_XOPEN or __USE_MISC or
__USE_XOPEN || __USE_MISC, for greater compatibility with code that
(wrongly) expects this optional inclusion to be present there.  (I
think the three affected files in glibc should still have explicit
sys/uio.h inclusions added in any case, however.)

Tested for x86_64.

	[BZ #21426]
	* misc/bits/types/struct_iovec.h: New file.
	* misc/Makefile (headers): Add bits/types/struct_iovec.h.
	* include/bits/types/struct_iovec.h: New file.
	* bits/uio.h (struct iovec): Replace by inclusion of
	<bits/types/struct_iovec.h>.
	* sysdeps/unix/sysv/linux/bits/uio.h (struct iovec): Likewise.
	* socket/sys/socket.h: Include <bits/types/struct_iovec.h> instead
	of <sys/uio.h>.
	* nptl/tst-cancel4.c: Include <sys/uio.h>
	* posix/test-errno.c: Likewise.
	* support/resolv_test.c: Likewise.
	* conform/Makefile (test-xfail-POSIX2008/arpa/inet.h/conform):
	Remove.
	(test-xfail-POSIX2008/netdb.h/conform): Likewise.
	(test-xfail-POSIX2008/netinet/in.h/conform): Likewise.
	(test-xfail-POSIX2008/sys/socket.h/conform): Likewise.
2017-04-25 17:52:47 +00:00
Florian Weimer
e92030239a Assume that accept4 is always available and works
Simplify the Linux accept4 implementation based on the assumption
that it is available in some way.  __ASSUME_ACCEPT4_SOCKETCALL was
previously unused, so remove it.

For ia64, the accept4 system call (and socket call) were backported
in kernel version 3.2.18.  Reflect this in the installation
instructions.
2017-04-19 07:44:48 +02:00
Florian Weimer
e14a27723c resolv: Reduce EDNS payload size to 1200 bytes [BZ #21361]
This hardens the stub resolver against fragmentation-based attacks.
2017-04-13 13:09:38 +02:00
Zack Weinberg
b9e8c90875 Another round of inclusion fixes for _ISOMAC testsuite.
* stdio-common/bug25.c: Include stdlib.h.
	* support/tst-support_format_dns_packet.c: Include stdio.h,
	stdlib.h, and string.h.
	* support/tst-support_record_failure.c: Include string.h.
	* support/tst-support_record_failure-2.sh: Adjust line number
	expectations and correct a typo in an error message.
2017-03-22 08:44:32 -04:00
Florian Weimer
2bda2d820d support: Explain ignored failures of temporary file removal [BZ #21243] 2017-03-15 13:33:40 +01:00
Florian Weimer
ed3ea040ba support: Add error checking to close system calls [BZ #21244] 2017-03-15 13:33:40 +01:00
Florian Weimer
f889e73f60 support_format_dns_packet: Fix CNAME and multiple RR handling
Before this change, the loop iterating over RRs in the answer
section stopped at the first CNAME record, never printing them.
The CNAME and PTR record contents was extracted from the wrong
buffer (whole packet instead RDATA).  This desynced the parsing
after the first CNAME or PTR record.

Also fix the AAAA record parsing by checking their sizes.
2017-03-15 13:33:40 +01:00
Carlos O'Donell
f8bf15febc Bug 20116: Fix use after free in pthread_create()
The commit documents the ownership rules around 'struct pthread' and
when a thread can read or write to the descriptor. With those ownership
rules in place it becomes obvious that pd->stopped_start should not be
touched in several of the paths during thread startup, particularly so
for detached threads. In the case of detached threads, between the time
the thread is created by the OS kernel and the creating thread checks
pd->stopped_start, the detached thread might have already exited and the
memory for pd unmapped. As a regression test we add a simple test which
exercises this exact case by quickly creating detached threads with
large enough stacks to ensure the thread stack cache is bypassed and the
stacks are unmapped. Before the fix the testcase segfaults, after the
fix it works correctly and completes without issue.

For a detailed discussion see:
https://www.sourceware.org/ml/libc-alpha/2017-01/msg00505.html
2017-01-28 19:21:44 -05:00
Florian Weimer
faf0e9c841 nptl: Add tst-robust-fork 2017-01-27 06:53:20 +01:00
Florian Weimer
73dfd08893 support: struct netent portability fix for support_format_netent 2017-01-01 09:35:45 +01:00
Florian Weimer
8e2c31b57f support: Use %td for pointer difference in xwrite 2017-01-01 09:27:54 +01:00
Joseph Myers
bfff8b1bec Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Florian Weimer
5840c75c2d resolv: Add beginnings of a libresolv test suite 2016-12-31 18:52:32 +01:00
Florian Weimer
f47ae51866 support: Implement --verbose option for test programs
Some tests can produce rather verbose tracing information,
and the --verbose option provides a standardized way to enable
such logging output.
2016-12-31 18:51:15 +01:00
Florian Weimer
039c5a05cc support: Use support_record_failure consistently
This causes more test programs to link in the support_record_failure
function, which triggers an early call to mmap from an ELF
constructor, but this should not have side effects intefering
with the functionality actually under test (unlike, say, a call
to malloc).
2016-12-31 18:51:15 +01:00
Florian Weimer
5707a64d94 support: Helper functions for entering namespaces 2016-12-31 18:51:07 +01:00
Joseph Myers
ef83c83a25 Fix tst-support_record_failure-2 for run-built-tests = no.
The support/tst-support_record_failure-2.out test attempts to run
built code even if run-built-tests = no, so failing with
build-many-glibcs.py for all architectures whose code cannot be run on
the system running the script.  This patch disables the test in that
case.

Tested for x86_64 (native), and for aarch64 with build-many-glibcs.py.

	* support/Makefile (tests-special): Make definition conditional on
	[$(run-built-tests) = yes].
	($(objpfx)tst-support_record_failure-2.out): Make rule conditional
	on [$(run-built-tests) = yes].
2016-12-30 13:01:44 +00:00
Adhemerval Zanella
59c900c54b Add SYSV message queue test
This patch adds a simple SYSV message queue test to check for correct
argument passing on kernel.  The idea is neither to be an extensive
testing nor to check for any specific Linux test.

	* sysvipc/Makefile (tests): Add test-sysvmsg.
	* sysvipc/test-sysvmsg.c: New file.
	* test-skeleton.c (FAIL_UNSUPPORTED): New define.
2016-12-28 20:30:59 -02:00
Florian Weimer
5f0b843790 support: Add support for delayed test failure reporting
The new functions support_record_failure records a test failure,
but does not terminate the process.  The macros TEST_VERIFY
and TEST_VERIFY_EXIT check that a condition is true.
2016-12-28 13:37:18 +01:00
Andreas Schwab
67f779f1ea Fix assertion failure on test timeout 2016-12-15 17:25:12 +01:00
Andreas Schwab
fea34d51e0 Fix testsuite timeout handling 2016-12-10 16:22:01 +01:00
Florian Weimer
c23de0aacb support: Introduce new subdirectory for test infrastructure
The new test driver in <support/test-driver.c> has feature parity with
the old one.  The main difference is that its hooking mechanism is
based on functions and function pointers instead of macros.  This
commit also implements a new environment variable, TEST_COREDUMPS,
which disables the code which disables coredumps (that is, it enables
them if the invocation environment has not disabled them).

<test-skeleton.c> defines wrapper functions so that it is possible to
use existing macros with the new-style hook functionality.

This commit changes only a few test cases to the new test driver, to
make sure that it works as expected.
2016-12-09 08:18:27 +01:00