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The clang open fortify wrapper from 4228baef1a94e8bde84ad74 added
a restriction where open with 3 arguments where flags do not
contain O_CREAT or O_TMPFILE are handled as invalid. They are
not invalid, since the third argument is ignored, and the gcc
wrapper also allows it.
Checked x86_64-linux-gnu and with a yocto build for some affected
packages.
Tested-by: “Khem Raj <raj.khen@gmail.com>”
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The fcntl.h fortify wrapper for clang added by 86889e22db329abac61
missed the __fortify_clang_overload_arg and and also added the
mode argument for the __fortify_function_error_function function,
which leads clang to be able to correct resolve which overloaded
function it should emit.
Checked on x86_64-linux-gnu.
Reported-by: Khem Raj <raj.khem@gmail.com>
Tested-by: Khem Raj <raj.khem@gmail.com>
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It improves open, open64, openat, and openat64. The compile and runtime
checks have similar coverage as with GCC.
Checked on aarch64, armhf, x86_64, and i686.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
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I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.
I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah. I don't
know why I run into these diagnostics whereas others evidently do not.
remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
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I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
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Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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Both open and openat load their last argument 'mode' lazily, using
va_arg() only if O_CREAT is found in oflag. This is wrong, mode is also
necessary if O_TMPFILE is in oflag.
By chance on x86_64, the problem wasn't evident when using O_TMPFILE
with open, as the 3rd argument of open, even when not loaded with
va_arg, is left untouched in RDX, where the syscall expects it.
However, openat was not so lucky, and O_TMPFILE couldn't be used: mode
is the 4th argument, in RCX, but the syscall expects its 4th argument in
a different register than the glibc wrapper, in R10.
Introduce a macro __OPEN_NEEDS_MODE (oflag) to test if either O_CREAT or
O_TMPFILE is set in oflag.
Tested on Linux x86_64.
[BZ #17523]
* io/fcntl.h (__OPEN_NEEDS_MODE): New macro.
* io/bits/fcntl2.h (open): Use it.
(openat): Likewise.
* io/open.c (__libc_open): Likewise.
* io/open64.c (__libc_open64): Likewise.
* io/open64_2.c (__open64_2): Likewise.
* io/open_2.c (__open_2): Likewise.
* io/openat.c (__openat): Likewise.
* io/openat64.c (__openat64): Likewise.
* io/openat64_2.c (__openat64_2): Likewise.
* io/openat_2.c (__openat_2): Likewise.
* sysdeps/mach/hurd/open.c (__libc_open): Likewise.
* sysdeps/mach/hurd/openat.c (__openat): Likewise.
* sysdeps/posix/open64.c (__libc_open64): Likewise.
* sysdeps/unix/sysv/linux/dl-openat64.c (openat64): Likewise.
* sysdeps/unix/sysv/linux/generic/open.c (__libc_open): Likewise.
(__open_nocancel): Likewise.
* sysdeps/unix/sysv/linux/generic/open64.c (__libc_open64): Likewise.
* sysdeps/unix/sysv/linux/open64.c (__libc_open64): Likewise.
* sysdeps/unix/sysv/linux/openat.c (__OPENAT): Likewise.
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No more __const.
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* rt/Makefile (headers): Add bits/mqueue2.h.
* rt/mqueue.h: Include bits/mqueue2.h if -D_FORTIFY_SOURCE=2,
optimizing with GCC and __va_arg_pack_len is defined.
* rt/bits/mqueue2.h: New file.
* rt/mq_open.c (__mq_open): Renamed from mq_open.
(mq_open): New strong_alias.
(__mq_open_2): New function.
* sysdeps/unix/sysv/linux/mq_open.c (__mq_open): Renamed from mq_open.
(mq_open): New strong_alias.
(__mq_open_2): New function.
* debug/Versions (libc): Export __fortify_fail@@GLIBC_PRIVATE.
* Versions.def (librt): Add GLIBC_2.7 version.
* debug/fortify_fail.c (__fortify_fail): Add libc_hidden_def.
* include/stdio.h (__fortify_fail): Add libc_hidden_proto.
* misc/sys/cdefs.h (__errordecl, __va_arg_pack_len): Define.
* io/fcntl.h: Include bits/fcntl2.h when __va_arg_pack_len
is defined rather than when not C++.
* io/bits/fcntl2.h (__open_alias, __open64_alias, __openat_alias,
__openat64_alias): New redirects.
(__open_too_many_args, __open_missing_mode, __open64_too_many_args,
__open64_missing_mode, __openat_too_many_args, __openat_missing_mode,
__openat64_too_many_args, __openat64_missing_mode): New __errordecls.
(open, open64, openat, openat64): Rewrite as __extern_always_inline
functions instead of function-like macros.
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__extension__ around the whole statement expression.
2007-08-04 Jakub Jelinek <jakub@redhat.com>
* io/bits/fcntl2.h (open, open64, openat, openat64): Add
__extension__ around the whole statement expression.
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(open): Fix comment typos. Don't call __open_2 if flags
is a compile time constant without O_CREAT.
(__open64_2): Add nonnull attribute.
(open64): Fix comment typos. Don't call __open64_2 if flags
is a compile time constant without O_CREAT.
(__openat_2): Add nonnull attribute, fix nonnull attribute
on redirect.
(openat): Fix comment typos. Don't call __openat_2 if flags
is a compile time constant without O_CREAT.
(__openat64_2): Add nonnull attribute, fix nonnull attribute
on redirect.
(openat64): Fix comment typos. Don't call __openat64_2 if flags
is a compile time constant without O_CREAT.
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(THREAD_GSCOPE_FLAG_UNUSED, THREAD_GSCOPE_FLAG_USED,
THREAD_GSCOPE_FLAG_WAIT): Define.
(THREAD_GSCOPE_GET_FLAG, THREAD_GSCOPE_SET_FLAG,
THREAD_GSCOPE_RESET_FLAG, THREAD_GSCOPE_WAIT): Define.
* sysdeps/i386/tls.h (THREAD_GSCOPE_WAIT): Don't use
PTR_DEMANGLE.
(THREAD_GSCOPE_GET_FLAG): Define.
* sysdeps/x86_64/tls.h (THREAD_GSCOPE_GET_FLAG): Define.
* allocatestack.c (__wait_lookup_done): Use THREAD_GSCOPE_GET_FLAG
instead of ->header.gscope_flag directly.
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* Versions: Define GLIBC_2.7 for libc.
* include/stdio.h: Declare __fortify_fail.
* debug/fortify_fail.c: New file.
* debug/Makefile (routines): Add fortify_fail.
* debug/chk_fail.c: Use __fortify_fail.
* debug/stack_chk_fail.c: Likewise.
* io/Versions: Export __open_2, __open64_2, __openat_2, and
__openat64_2 for GLIBC_2.7.
* io/fcntl.h: When compiling with fortification, include bits/fcntl2.h.
* io/open.c: Define *_2 variant of function which checks for O_CREAT
and fails if necessary.
* io/open64.c: Likewise.
* io/openat.c: Likewise.
* io/openat64.c: Likewise.
* sysdeps/unix/sysv/linux/open64.c: Likewise.
* sysdeps/unix/sysv/linux/openat.c: Likewise.
* sysdeps/unix/sysv/linux/openat64.c: Likewise.
* io/bits/fcntl2.h: New file.
* include/fcntl.h: Declare __open_2, __open64_2, __openat_2, and
__openat64_2.
* include/bits/fcntl2.h: New file.
* sysdeps/unix/sysv/linux/Makefile [subdir=io] (sysdep_routines):
Add open_2.
* sysdeps/unix/sysv/linux/open_2.c: New file.
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