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2024-01-12getcwd: Set errno to ERANGE for size == 1 (CVE-2021-3999)Siddhesh Poyarekar1-0/+6
Cherry-picked from 23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e in main branch. Test included with this commit is not cherry-picked because it requires more changes. No valid path returned by getcwd would fit into 1 byte, so reject the size early and return NULL with errno set to ERANGE. This change is prompted by CVE-2021-3999, which describes a single byte buffer underflow and overflow when all of the following conditions are met: - The buffer size (i.e. the second argument of getcwd) is 1 byte - The current working directory is too long - '/' is also mounted on the current working directory Sequence of events: - In sysdeps/unix/sysv/linux/getcwd.c, the syscall returns ENAMETOOLONG because the linux kernel checks for name length before it checks buffer size - The code falls back to the generic getcwd in sysdeps/posix - In the generic func, the buf[0] is set to '\0' on line 250 - this while loop on line 262 is bypassed: while (!(thisdev == rootdev && thisino == rootino)) since the rootfs (/) is bind mounted onto the directory and the flow goes on to line 449, where it puts a '/' in the byte before the buffer. - Finally on line 458, it moves 2 bytes (the underflowed byte and the '\0') to the buf[0] and buf[1], resulting in a 1 byte buffer overflow. - buf is returned on line 469 and errno is not set. This resolves BZ #28769. Reviewed-by: Andreas Schwab <schwab@linux-m68k.org> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Signed-off-by: Qualys Security Advisory <qsa@qualys.com> Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2024-01-12CVE-2018-19591: if_nametoindex: Fix descriptor for overlong name [BZ #23927]Florian Weimer1-0/+4
2024-01-12CVE-2016-10739: getaddrinfo: Fully parse IPv4 address strings [BZ #20018]Florian Weimer1-0/+4
Some tests in original commit are not included because they depend on headers that are not present in GRTEv5 branch. The IPv4 address parser in the getaddrinfo function is changed so that it does not ignore trailing whitespace and all characters after it. For backwards compatibility, the getaddrinfo function still recognizes legacy name syntax, such as 192.000.002.010 interpreted as 192.0.2.8 (octal). This commit does not change the behavior of inet_addr and inet_aton. gethostbyname already had additional sanity checks (but is switched over to the new __inet_aton_exact function for completeness as well). To avoid sending the problematic query names over DNS, commit 6ca53a2453598804a2559a548a08424fca96434a ("resolv: Do not send queries for non-host-names in nss_dns [BZ #24112]") is needed.
2021-08-27[BZ #19239] Don't include sys/sysmacros.h from sys/types.h.Zack Weinberg1-0/+13
This completes the deprecation and removal of this inclusion, which was begun in the 2.25 release. * posix/sys/types.h: Don't include sys/sysmacros.h. * misc/sys/sysmacros.h: Remove the conditional deprecation warnings for the macros defined by this header.
2021-08-27NEWS: Move security-lated changes before bug listFlorian Weimer1-13/+13
This matches the practice for previous releases.
2021-08-27Add references to CVE-2018-11236, CVE-2017-18269Florian Weimer1-0/+7
2021-08-27Don't write beyond destination in __mempcpy_avx512_no_vzeroupper (bug 23196)Andreas Schwab1-0/+7
When compiled as mempcpy, the return value is the end of the destination buffer, thus it cannot be used to refer to the start of it. (cherry picked from commit 9aaaab7c6e4176e61c59b0a63c6ba906d875dc0e)
2021-08-27sunrpc: Remove stray exports without --enable-obsolete-rpc [BZ #23166]Florian Weimer1-0/+1
This is needed to avoid a warning when linking against libtirpc: /lib64/libc.so.6: warning: common of `rpc_createerr@@TIRPC_0.3.0' overridden by definition /usr/lib64/libtirpc.so: warning: defined here This ld warning is not enabled by default; -Wl,--warn-common enables it. Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit 89aacb513eb77549a29df2638913a0f8178cf3f5)
2021-08-27gd_GB: Fix typo in abbreviated "May" (bug 23152).Rafal Luzynski1-0/+1
[BZ #23152] * localedata/locales/gd_GB (abmon): Fix typo in May: "Mhàrt" -> "Cèit". Adjust the comment according to the change. Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit bb066cb806dfe55511cf2fb59bf013751152608f)
2021-08-27NEWS: add entries for bugs 17343, 20419, 22644, 22786, 22884, 22947, 23005, ↵Dmitry V. Levin1-0/+13
23037, 23069, 23137
2021-08-27NEWS: Add entries for bugs: 22848, 22932, 22937, 22963.Rafal Luzynski1-0/+10
Alternative (nominative/genitive) month names have been added to the Catalan and Czech locale data and the abbreviated alternative names to Catalan and Greek. (cherry picked from commit c553cd6f7e939ae4ef62b52b3c55fbe76dddecee)
2017-11-17i386: Fix i386 sigaction sa_restorer initialization (BZ#21269)Adhemerval Zanella1-0/+1
This patch fixes the i386 sa_restorer field initialization for sigaction syscall for kernel with vDSO. As described in bug report, i386 Linux (and compat on x86_64) interprets SA_RESTORER clear with nonzero sa_restorer as a request for stack switching if the SS segment is 'funny'. This means that anything that tries to mix glibc's signal handling with segmentation (for instance through modify_ldt syscall) is randomly broken depending on what values lands in sa_restorer. The testcase added is based on Linux test tools/testing/selftests/x86/ldt_gdt.c, more specifically in do_multicpu_tests function. The main changes are: - C11 atomics instead of plain access. - Remove x86_64 support which simplifies the syscall handling and fallbacks. - Replicate only the test required to trigger the issue. Checked on i686-linux-gnu. [BZ #21269] * sysdeps/unix/sysv/linux/i386/Makefile (tests): Add tst-bz21269. * sysdeps/unix/sysv/linux/i386/sigaction.c (SET_SA_RESTORER): Clear sa_restorer for vDSO case. * sysdeps/unix/sysv/linux/i386/tst-bz21269.c: New file. (cherry picked from commit 68448be208ee06e76665918b37b0a57e3e00c8b4)
2018-03-02Fix multiple definitions of __nss_*_database (bug 22918)Andreas Schwab1-0/+1
(cherry picked from commit eaf6753f8aac33a36deb98c1031d1bad7b593d2d)
2018-03-01[BZ #22342] Fix netgroup cache keys.DJ Delorie1-0/+1
Unlike other nscd caches, the netgroup cache contains two types of records - those for "iterate through a netgroup" (i.e. setnetgrent()) and those for "is this user in this netgroup" (i.e. innetgr()), i.e. full and partial records. The timeout code assumes these records have the same key for the group name, so that the collection of records that is "this netgroup" can be expired as a unit. However, the keys are not the same, as the in-netgroup key is generated by nscd rather than being passed to it from elsewhere, and is generated without the trailing NUL. All other keys have the trailing NUL, and as noted in the linked BZ, debug statements confirm that two keys for the same netgroup are added to the cache with two different lengths. The result of this is that as records in the cache expire, the purge code only cleans out one of the two types of entries, resulting in stale, possibly incorrect, and possibly inconsistent cache data. The patch simply includes the existing NUL in the computation for the key length ('key' points to the char after the NUL, and 'group' to the first char of the group, so 'key-group' includes the first char to the NUL, inclusive). [BZ #22342] * nscd/netgroupcache.c (addinnetgrX): Include trailing NUL in key value. Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit 1c81d55fc4b07b51adf68558ba74ce975153e580)
2018-02-10linux/powerpc: sync sys/ptrace.h with Linux 4.15 [BZ #22433, #22807]Dmitry V. Levin1-0/+1
Tested with strace. * sysdeps/unix/sysv/linux/powerpc/sys/ptrace.h (__ptrace_request): Add PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS, PTRACE_SETFPREGS, PTRACE_GETVRREGS, PTRACE_SETVRREGS, PTRACE_GETEVRREGS, PTRACE_SETEVRREGS, PTRACE_GETREGS64, PTRACE_SETREGS64, PTRACE_GET_DEBUGREG, PTRACE_SET_DEBUGREG, PTRACE_GETVSRREGS, PTRACE_SETVSRREGS, and PTRACE_SINGLEBLOCK. (cherry picked from commit f5f473a9d0e8fdbede858fa1ef0d01d12142367b)
2018-02-19manual: Document missing feature test macros.Rical Jasan1-0/+1
Several feature test macros are documented in features.h but absent in the manual, and some documented macros accept undocumented values. This commit updates the manual to mention all the accepted macros, along with any values that hold special meaning. * manual/creature.texi (_POSIX_C_SOURCE): Document special values of 199606L, 200112L, and 200809L. (_XOPEN_SOURCE): Document special values of 600 and 700. (_ISOC11_SOURCE): Document macro. (_ATFILE_SOURCE): Likewise. (_FORTIFY_SOURCE): Likewise. (cherry picked from commit 6a3962c4a408e8cbc305d2433711196107374e89) (cherry picked from commit da81ae645d8ee89052f109c814a68a9489f562e6)
2018-03-08NEWS: add entries for bugs 22919 and 22926Dmitry V. Levin1-0/+2
2018-02-16manual: Improve documentation of get_current_dir_name. [BZ #6889]Rical Jasan1-0/+1
This is a minor rewording to clarify the behaviour of get_current_dir_name. Additionally, the @vindex is moved above the @deftypefun so that following links give a better result with regard to context. [BZ #6889] * manual/filesys.texi (get_current_dir_name): Clarify behaviour. (cherry picked from commit 7d15ef84f50a80cb170f8ce3457010f59e221cb8)
2018-02-18Fix posix/tst-glob_lstat_compat on alpha [BZ #22818]Aurelien Jarno1-0/+1
The tst-glob_lstat_compat test needs to run tests on the previous version of glob. On alpha, there are three versions of glob, GLIBC_2.0, GLIBC_2.1 and GLIBC_2.27, while on other architectures there are only the GLIBC_2.0 and GLIBC_2.27 version. Therefore on alpha the previous version is GLIBC_2.1 and not GLIBC_2.0. Changelog: [BZ #22818] * posix/tst-glob_lstat_compat.c [__alpha__] (glob): Access the GLIBC_2.1 version. (cherry picked from commit f8d79582896c52cc2b50bdd030a3ec27ef23b587)
2018-02-02time: Reference CLOCKS_PER_SEC in clock comment [BZ #22735]Sean McKean1-0/+1
(cherry picked from commit 09e56b9e18f987105e39768f907db800e9330930)
2018-02-06NEWS: add an entry for bug 22827Dmitry V. Levin1-0/+1
2018-02-07Linux: use reserved name __key in pkey_get [BZ #22797]Igor Gnatenko1-0/+1
_key is not reserved name and we should avoid using that. It seems that it was simple typo when pkey_* was implemented. (cherry picked from commit 388ff7bd0d57d7061fdd39a2f26f65687e8058da)
2018-02-06NEWS: add an entry for bug 22638Dmitry V. Levin1-0/+8
2018-02-06Record CVE-2018-6551 in NEWS and ChangeLog [BZ #22774]Florian Weimer1-0/+4
(cherry picked from commit 71aa429b029fdb6f9e65d44050388b51eca460d6)
2018-02-01NEWS: add the list of bugs fixed in 2.27Dmitry V. Levin1-2/+312
2018-02-01Record CVE-2018-6485 in ChangeLog and NEWS [BZ #22343]Florian Weimer1-0/+4
2018-02-01NEWS: List the languages which use the alternative months.Rafal Luzynski1-1/+8
[BZ #10871] * NEWS: List the languages which actually use the alternative months feature in this release. Also explain that "alt_mon" and "ab_alt_mon" are optional.
2018-01-29Skeleton documentation for the RISC-V portPalmer Dabbelt1-4/+12
During the upstreaming process it was suggested that I add a handful of small documentation entries about the RISC-V port, which I've collected here. 2018-01-29 Palmer Dabbelt <palmer@sifive.com> * manual/math.texi: RISC-V supports _Float128 and _Float64x.
2018-01-23NEWS: Fix spelling mistake: "%ob" -> "%Ob".Rafal Luzynski1-1/+1
2018-01-23NEWS: fix spelling mistakeDmitry V. Levin1-1/+1
2018-01-23NEWS: Fix spelling mistake.Carlos O'Donell1-1/+1
2018-01-23NEWS: Document static application consequenes of %OB/%Ob.Carlos O'Donell1-0/+15
2018-01-22Fix the wording in NEWS to use "or later"Szabolcs Nagy1-2/+2
2018-01-22Update NEWS with binutils version requirement for static PIE supportSzabolcs Nagy1-1/+2
2018-01-22Documentation to the above changes (bug 10871).Rafal Luzynski1-0/+24
[BZ #10871] * manual/locale.texi: Document ALTMON_1..12 constants for nl_langinfo. Specify when to use ALTMON instead of MON. * manual/time.texi (strftime, strptime): Document GNU extension permitting O modifier with %B and %b. Specify when to use %OB instead of %B. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2018-01-12linux: make getcwd(3) fail if it cannot obtain an absolute path [BZ #22679]Dmitry V. Levin1-0/+4
Currently getcwd(3) can succeed without returning an absolute path because the underlying getcwd syscall, starting with linux commit v2.6.36-rc1~96^2~2, may succeed without returning an absolute path. This is a conformance issue because "The getcwd() function shall place an absolute pathname of the current working directory in the array pointed to by buf, and return buf". This is also a security issue because a non-absolute path returned by getcwd(3) causes a buffer underflow in realpath(3). Fix this by checking the path returned by getcwd syscall and falling back to generic_getcwd if the path is not absolute, effectively making getcwd(3) fail with ENOENT. The error code is chosen for consistency with the case when the current directory is unlinked. [BZ #22679] CVE-2018-1000001 * sysdeps/unix/sysv/linux/getcwd.c (__getcwd): Fall back to generic_getcwd if the path returned by getcwd syscall is not absolute. * io/tst-getcwd-abspath.c: New test. * io/Makefile (tests): Add tst-getcwd-abspath.
2018-01-08x86-64: Add sincosf with vector FMAH.J. Lu1-2/+2
Since the x86-64 assembly version of sincosf is higly optimized with vector instructions, there isn't much room for improvement. However s_sincosf.c written in C with vector math and intrinsics can be optimized by GCC with FMA. On Skylake, bench-sincosf reports performance improvement: Assembly FMA improvement max 104.042 101.008 3% min 9.426 8.586 10% mean 20.6209 18.2238 13% * sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines): Add s_sincosf-sse2 and s_sincosf-fma. (CFLAGS-s_sincosf-fma.c): New. * sysdeps/x86_64/fpu/multiarch/s_sincosf-fma.c: New file. * sysdeps/x86_64/fpu/multiarch/s_sincosf-sse2.S: Likewise. * sysdeps/x86_64/fpu/multiarch/s_sincosf.c: Likewise. * sysdeps/x86_64/fpu/s_sincosf.S: Don't add alias if __sincosf is defined.
2018-01-05NEWS: Deprecate static dlopenFlorian Weimer1-0/+4
2018-01-05NEWS: Deprecate direct access libio internalsFlorian Weimer1-0/+27
2018-01-02Update NEWS to add cosf and sincosf optimizationRajalakshmi Srinivasaraghavan1-1/+1
2018-01-01Update copyright dates not handled by scripts/update-copyrights.Joseph Myers1-1/+1
I've updated copyright dates in glibc for 2018. This is the patch for the changes not generated by scripts/update-copyrights and subsequent build / regeneration of generated files. Please remember to include 2018 in the dates for any new files added in future (which means updating any existing uncommitted patches you have that add new files to use the new copyright dates in them). * NEWS: Update copyright dates. * catgets/gencat.c (print_version): Likewise. * csu/version.c (banner): Likewise. * debug/catchsegv.sh: Likewise. * debug/pcprofiledump.c (print_version): Likewise. * debug/xtrace.sh (do_version): Likewise. * elf/ldconfig.c (print_version): Likewise. * elf/ldd.bash.in: Likewise. * elf/pldd.c (print_version): Likewise. * elf/sotruss.sh: Likewise. * elf/sprof.c (print_version): Likewise. * iconv/iconv_prog.c (print_version): Likewise. * iconv/iconvconfig.c (print_version): Likewise. * locale/programs/locale.c (print_version): Likewise. * locale/programs/localedef.c (print_version): Likewise. * login/programs/pt_chown.c (print_version): Likewise. * malloc/memusage.sh (do_version): Likewise. * malloc/memusagestat.c (print_version): Likewise. * malloc/mtrace.pl: Likewise. * manual/libc.texinfo: Likewise. * nptl/version.c (banner): Likewise. * nscd/nscd.c (print_version): Likewise. * nss/getent.c (print_version): Likewise. * nss/makedb.c (print_version): Likewise. * posix/getconf.c (main): Likewise. * scripts/test-installation.pl: Likewise. * sysdeps/unix/sysv/linux/lddlibc4.c (main): Likewise.
2018-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers1-1/+1
* 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.
2017-12-30elf: Check for empty tokens before dynamic string token expansion [BZ #22625]Aurelien Jarno1-0/+4
The fillin_rpath function in elf/dl-load.c loops over each RPATH or RUNPATH tokens and interprets empty tokens as the current directory ("./"). In practice the check for empty token is done *after* the dynamic string token expansion. The expansion process can return an empty string for the $ORIGIN token if __libc_enable_secure is set or if the path of the binary can not be determined (/proc not mounted). Fix that by moving the check for empty tokens before the dynamic string token expansion. In addition, check for NULL pointer or empty strings return by expand_dynamic_string_token. The above changes highlighted a bug in decompose_rpath, an empty array is represented by the first element being NULL at the fillin_rpath level, but by using a -1 pointer in decompose_rpath and other functions. Changelog: [BZ #22625] * elf/dl-load.c (fillin_rpath): Check for empty tokens before dynamic string token expansion. Check for NULL pointer or empty string possibly returned by expand_dynamic_string_token. (decompose_rpath): Check for empty path after dynamic string token expansion.
2017-12-24Deprecate external use of libio.h and _G_config.h.Zack Weinberg1-0/+11
libio.h was originally the header for a set of supported GNU extensions, but they have not been maintained as such in many years, they are now standing in the way of improvements to stdio, and we don't think there are any remaining external users. _G_config.h was never intended for public use, but predates the bits convention. Move both of these headers into the bits directory and provide stubs at top level which issue deprecation warnings. The contents of (bits/)libio.h and (bits/)_G_config.h are still exposed to external software via stdio.h; changing that requires more complex surgery than I have time to attempt right now. * libio/libio.h, libio/_G_config.h: New stub headers which issue a deprecation warning and then include <bits/libio.h>, <bits/_G_config.h> respectively. * libio/libio.h: Rename the original version of this file to libio/bits/libio.h. Error out if not included by stdio.h or the stub libio.h. * include/libio.h: Move to include/bits. Forward to libio/bits/libio.h. * sysdeps/generic/_G_config.h: Move to top-level bits/. Error out if not included by bits/libio.h or the stub _G_config.h. * sysdeps/unix/sysv/linux/_G_config.h: Move to sysdeps/unix/sysv/linux/bits. Error out if not included by bits/libio.h or the stub _G_config.h. * libio/stdio.h: Include bits/libio.h, not libio.h. * libio/Makefile: Install bits/libio.h and bits/_G_config.h as well as libio.h and _G_config.h. * csu/init.c, libio/fmemopen.c, libio/iolibio.h, libio/oldfmemopen.c * libio/strfile.h, stdio-common/vfscanf.c * sysdeps/pthread/flockfile.c, sysdeps/pthread/funlockfile.c Include stdio.h, not _G_config.h nor libio.h. * libio/iofgetpos.c: Also rename fgetpos64 out of the way. * libio/iofsetpos.c: Also rename fsetpos64 out of the way. * scripts/check-installed-headers.sh: Skip libio.h and _G_config.h.
2017-12-22copy_file_range: New function to copy file dataFlorian Weimer1-0/+2
The semantics are based on the Linux system call, but a very close emulation in user space is provided.
2017-12-20Remove tilepro-*-linux-gnu supportAdhemerval Zanella1-0/+2
As from previous discussions [1] this patch removes tileprox-*-linux-gnu support from GLIBC. This patch is a straigthfoward one, which just remove tilepro specific implementation and configurations (no sysdep simplfication or reorganization is done). * README: Remove tilepro-*-linux-gnu from supported architecture. * scripts/build-many-glibcs.py: Likewise. * sysdeps/tile/__tls_get_addr.S (__tls_get_addr): Likewise. * sysdeps/tile/crti.S (PREINIT_FUNCTION): Likewise. * sysdeps/tile/dl-machine.h (ELF_MACHINE_NAME, elf_machine_matches_host, elf_machine_dynamic, elf_machine_load_address, elf_machine_runtime_setup, reloc_howto howto, elf_machine_rela): Likewise * sysdeps/tile/dl-start.S (_start): Likewise. * sysdeps/tile/memcmp.c (DBLALIGN, REVBYTES): Likewise. * sysdeps/tile/memcopy.h (MEMCPY_OK_FOR_FWD_MEMMOVE, MEMCPY_OK_FOR_FWD_MEMMOVE, op_t): Likewise. * sysdeps/tile/nptl/pthread_spin_lock.c (TNS, CMPTNS): Likewise. * sysdeps/tile/nptl/pthread_spin_trylock.c (TNS): Likewise. * sysdeps/tile/nptl/pthread_spin_unlock.c (pthread_spin_unlock): Likewise. * sysdeps/tile/nptl/tls.h (DB_THREAD_SELF): Likewise. * sysdeps/tile/preconfigure: Likewise. * sysdeps/tile/stackguard-macros.h (STACK_CHK_GUARD, POINTER_CHK_GUARD): Likewise. * sysdeps/tile/stackinfo.h (__stackinfo_sub): Likewise. * sysdeps/tile/start.S (_start): Likewise. * sysdeps/tile/tls-macros.h (TLS_GD_OFFSET, TLS_IE_OFFSET, _TLS_LE): Likewise. * sysdeps/tile/sysdep.h (REGSIZE): Likewise. (LD, LD4U, ST, ST4, BNEZ, BEQZ, BEQZT, BGTZ, CMPEQI, CMPEQ, CMOVEQZ, CMOVNEZ): Remove. * sysdeps/unix/sysv/linux/tile/bits/environments.h (__ILP32_OFF32_CFLAGS, __ILP32_OFFBIG_CFLAGS, __ILP32_OFF32_LDFLAGS, __ILP32_OFFBIG_LDFLAGS, __LP64_OFF64_CFLAGS, __LP64_OFF64_LDFLAGS): Likewise. * sysdeps/tile/wordcopy.c (DBLALIGN): Likewise. * sysdeps/tile/tilepro/Implies: Remove file. * sysdeps/tile/tilepro/atomic-machine.h: Likewise. * sysdeps/tile/tilepro/bits/wordsize.h: Likewise. * sysdeps/tile/tilepro/memchr.c: Likewise. * sysdeps/tile/tilepro/memcpy.S: Likewise. * sysdeps/tile/tilepro/memset.c: Likewise. * sysdeps/tile/tilepro/memusage.h: Likewise. * sysdeps/tile/tilepro/rawmemchr.c: Likewise. * sysdeps/tile/tilepro/strchr.c: Likewise. * sysdeps/tile/tilepro/strchrnul.c: Likewise. * sysdeps/tile/tilepro/strlen.c: Likewise. * sysdeps/tile/tilepro/strrchr.c: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/Implies: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/c++-types.data: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/jmp_buf-macros.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/ld.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/ldconfig.h: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libBrokenLocale.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libanl.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libcrypt.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libdl.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libnsl.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libpthread.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libresolv.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/librt.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libthread_db.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libutil.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/register-dump.h: Likewise. * sysdeps/unix/sysv/linux/tile/sysconf.c (linux_sysconf): Remove tilepro mention in comment. [1] https://sourceware.org/ml/libc-alpha/2017-12/msg00038.html
2017-12-18Update NEWS with aarch64 static pie supportSzabolcs Nagy1-1/+1
The required binutils patches are not in a released version yet, but glibc has support for static linked pie on aarch64 since commit 14d886edbd3d80b771e1c42fbd9217f9074de9c6
2017-12-16ldconfig: set LC_COLLATE to C [BZ #22505]Aurelien Jarno1-0/+4
ldconfig supports `include' directives and use the glob function to process them. The glob function sort entries according to the LC_COLLATE category. When using a standard "include /etc/ld.so.conf.d/*.conf" entry in /etc/ld.so.conf, the order therefore depends on the locale used to run ldconfig. A few examples of locale specific order that might be disturbing in that context compared to the C locale: - The cs_CZ and sk_SK locales sort the digits after the letters. - The et_EE locale sorts the 'z' between 's' and 't'. This patch fixes that by setting LC_COLLATE to C in order to process files in deterministic order, independently of the locale used to launch ldconfig. NOTE: This should NOT be backported to older release branches. Changelog: [BZ #22505] * elf/ldconfig.c (main): Call setlocale to force LC_COLLATE to C.
2017-12-15Add --enable-static-pie configure option to build static PIE [BZ #19574]H.J. Lu1-0/+9
Static PIE extends address space layout randomization to static executables. It provides additional security hardening benefits at the cost of some memory and performance. Dynamic linker, ld.so, is a standalone program which can be loaded at any address. This patch adds a configure option, --enable-static-pie, to embed the part of ld.so in static executable to create static position independent executable (static PIE). A static PIE is similar to static executable, but can be loaded at any address without help from a dynamic linker. When --enable-static-pie is used to configure glibc, libc.a is built as PIE and all static executables, including tests, are built as static PIE. The resulting libc.a can be used together with GCC 8 or above to build static PIE with the compiler option, -static-pie. But GCC 8 isn't required to build glibc with --enable-static-pie. Only GCC with PIE support is needed. When an older GCC is used to build glibc with --enable-static-pie, proper input files are passed to linker to create static executables as static PIE, together with "-z text" to prevent dynamic relocations in read-only segments, which are not allowed in static PIE. The following changes are made for static PIE: 1. Add a new function, _dl_relocate_static_pie, to: a. Get the run-time load address. b. Read the dynamic section. c. Perform dynamic relocations. Dynamic linker also performs these steps. But static PIE doesn't load any shared objects. 2. Call _dl_relocate_static_pie at entrance of LIBC_START_MAIN in libc.a. crt1.o, which is used to create dynamic and non-PIE static executables, is updated to include a dummy _dl_relocate_static_pie. rcrt1.o is added to create static PIE, which will link in the real _dl_relocate_static_pie. grcrt1.o is also added to create static PIE with -pg. GCC 8 has been updated to support rcrt1.o and grcrt1.o for static PIE. Static PIE can work on all architectures which support PIE, provided: 1. Target must support accessing of local functions without dynamic relocations, which is needed in start.S to call __libc_start_main with function addresses of __libc_csu_init, __libc_csu_fini and main. All functions in static PIE are local functions. If PIE start.S can't reach main () defined in a shared object, the code sequence: pass address of local_main to __libc_start_main ... local_main: tail call to main via PLT can be used. 2. start.S is updated to check PIC instead SHARED for PIC code path and avoid dynamic relocation, when PIC is defined and SHARED isn't defined, to support static PIE. 3. All assembly codes are updated check PIC instead SHARED for PIC code path to avoid dynamic relocations in read-only sections. 4. All assembly codes are updated check SHARED instead PIC for static symbol name. 5. elf_machine_load_address in dl-machine.h are updated to support static PIE. 6. __brk works without TLS nor dynamic relocations in read-only section so that it can be used by __libc_setup_tls to initializes TLS in static PIE. NB: When glibc is built with GCC defaulted to PIE, libc.a is compiled with -fPIE, regardless if --enable-static-pie is used to configure glibc. When glibc is configured with --enable-static-pie, libc.a is compiled with -fPIE, regardless whether GCC defaults to PIE or not. The same libc.a can be used to build both static executable and static PIE. There is no need for separate PIE copy of libc.a. On x86-64, the normal static sln: text data bss dec hex filename 625425 8284 5456 639165 9c0bd elf/sln the static PIE sln: text data bss dec hex filename 657626 20636 5392 683654 a6e86 elf/sln The code size is increased by 5% and the binary size is increased by 7%. Linker requirements to build glibc with --enable-static-pie: 1. Linker supports --no-dynamic-linker to remove PT_INTERP segment from static PIE. 2. Linker can create working static PIE. The x86-64 linker needs the fix for https://sourceware.org/bugzilla/show_bug.cgi?id=21782 The i386 linker needs to be able to convert "movl main@GOT(%ebx), %eax" to "leal main@GOTOFF(%ebx), %eax" if main is defined locally. Binutils 2.29 or above are OK for i686 and x86-64. But linker status for other targets need to be verified. 3. Linker should resolve undefined weak symbols to 0 in static PIE: https://sourceware.org/bugzilla/show_bug.cgi?id=22269 4. Many ELF backend linkers incorrectly check bfd_link_pic for TLS relocations, which should check bfd_link_executable instead: https://sourceware.org/bugzilla/show_bug.cgi?id=22263 Tested on aarch64, i686 and x86-64. Using GCC 7 and binutils master branch, build-many-glibcs.py with --enable-static-pie with all patches for static PIE applied have the following build successes: PASS: glibcs-aarch64_be-linux-gnu build PASS: glibcs-aarch64-linux-gnu build PASS: glibcs-armeb-linux-gnueabi-be8 build PASS: glibcs-armeb-linux-gnueabi build PASS: glibcs-armeb-linux-gnueabihf-be8 build PASS: glibcs-armeb-linux-gnueabihf build PASS: glibcs-arm-linux-gnueabi build PASS: glibcs-arm-linux-gnueabihf build PASS: glibcs-arm-linux-gnueabihf-v7a build PASS: glibcs-arm-linux-gnueabihf-v7a-disable-multi-arch build PASS: glibcs-m68k-linux-gnu build PASS: glibcs-microblazeel-linux-gnu build PASS: glibcs-microblaze-linux-gnu build PASS: glibcs-mips64el-linux-gnu-n32 build PASS: glibcs-mips64el-linux-gnu-n32-nan2008 build PASS: glibcs-mips64el-linux-gnu-n32-nan2008-soft build PASS: glibcs-mips64el-linux-gnu-n32-soft build PASS: glibcs-mips64el-linux-gnu-n64 build PASS: glibcs-mips64el-linux-gnu-n64-nan2008 build PASS: glibcs-mips64el-linux-gnu-n64-nan2008-soft build PASS: glibcs-mips64el-linux-gnu-n64-soft build PASS: glibcs-mips64-linux-gnu-n32 build PASS: glibcs-mips64-linux-gnu-n32-nan2008 build PASS: glibcs-mips64-linux-gnu-n32-nan2008-soft build PASS: glibcs-mips64-linux-gnu-n32-soft build PASS: glibcs-mips64-linux-gnu-n64 build PASS: glibcs-mips64-linux-gnu-n64-nan2008 build PASS: glibcs-mips64-linux-gnu-n64-nan2008-soft build PASS: glibcs-mips64-linux-gnu-n64-soft build PASS: glibcs-mipsel-linux-gnu build PASS: glibcs-mipsel-linux-gnu-nan2008 build PASS: glibcs-mipsel-linux-gnu-nan2008-soft build PASS: glibcs-mipsel-linux-gnu-soft build PASS: glibcs-mips-linux-gnu build PASS: glibcs-mips-linux-gnu-nan2008 build PASS: glibcs-mips-linux-gnu-nan2008-soft build PASS: glibcs-mips-linux-gnu-soft build PASS: glibcs-nios2-linux-gnu build PASS: glibcs-powerpc64le-linux-gnu build PASS: glibcs-powerpc64-linux-gnu build PASS: glibcs-tilegxbe-linux-gnu-32 build PASS: glibcs-tilegxbe-linux-gnu build PASS: glibcs-tilegx-linux-gnu-32 build PASS: glibcs-tilegx-linux-gnu build PASS: glibcs-tilepro-linux-gnu build and the following build failures: FAIL: glibcs-alpha-linux-gnu build elf/sln is failed to link due to: assertion fail bfd/elf64-alpha.c:4125 This is caused by linker bug and/or non-PIC code in PIE libc.a. FAIL: glibcs-hppa-linux-gnu build elf/sln is failed to link due to: collect2: fatal error: ld terminated with signal 11 [Segmentation fault] https://sourceware.org/bugzilla/show_bug.cgi?id=22537 FAIL: glibcs-ia64-linux-gnu build elf/sln is failed to link due to: collect2: fatal error: ld terminated with signal 11 [Segmentation fault] FAIL: glibcs-powerpc-linux-gnu build FAIL: glibcs-powerpc-linux-gnu-soft build FAIL: glibcs-powerpc-linux-gnuspe build FAIL: glibcs-powerpc-linux-gnuspe-e500v1 build elf/sln is failed to link due to: ld: read-only segment has dynamic relocations. This is caused by linker bug and/or non-PIC code in PIE libc.a. See: https://sourceware.org/bugzilla/show_bug.cgi?id=22264 FAIL: glibcs-powerpc-linux-gnu-power4 build elf/sln is failed to link due to: findlocale.c:96:(.text+0x22c): @local call to ifunc memchr This is caused by linker bug and/or non-PIC code in PIE libc.a. FAIL: glibcs-s390-linux-gnu build elf/sln is failed to link due to: collect2: fatal error: ld terminated with signal 11 [Segmentation fault], core dumped assertion fail bfd/elflink.c:14299 This is caused by linker bug and/or non-PIC code in PIE libc.a. FAIL: glibcs-sh3eb-linux-gnu build FAIL: glibcs-sh3-linux-gnu build FAIL: glibcs-sh4eb-linux-gnu build FAIL: glibcs-sh4eb-linux-gnu-soft build FAIL: glibcs-sh4-linux-gnu build FAIL: glibcs-sh4-linux-gnu-soft build elf/sln is failed to link due to: ld: read-only segment has dynamic relocations. This is caused by linker bug and/or non-PIC code in PIE libc.a. See: https://sourceware.org/bugzilla/show_bug.cgi?id=22263 Also TLS code sequence in SH assembly syscalls in glibc doesn't match TLS code sequence expected by ld: https://sourceware.org/bugzilla/show_bug.cgi?id=22270 FAIL: glibcs-sparc64-linux-gnu build FAIL: glibcs-sparcv9-linux-gnu build FAIL: glibcs-tilegxbe-linux-gnu build FAIL: glibcs-tilegxbe-linux-gnu-32 build FAIL: glibcs-tilegx-linux-gnu build FAIL: glibcs-tilegx-linux-gnu-32 build FAIL: glibcs-tilepro-linux-gnu build elf/sln is failed to link due to: ld: read-only segment has dynamic relocations. This is caused by linker bug and/or non-PIC code in PIE libc.a. See: https://sourceware.org/bugzilla/show_bug.cgi?id=22263 [BZ #19574] * INSTALL: Regenerated. * Makeconfig (real-static-start-installed-name): New. (pic-default): Updated for --enable-static-pie. (pie-default): New for --enable-static-pie. (default-pie-ldflag): Likewise. (+link-static-before-libc): Replace $(DEFAULT-LDFLAGS-$(@F)) with $(if $($(@F)-no-pie),$(no-pie-ldflag),$(default-pie-ldflag)). Replace $(static-start-installed-name) with $(real-static-start-installed-name). (+prectorT): Updated for --enable-static-pie. (+postctorT): Likewise. (CFLAGS-.o): Add $(pie-default). (CFLAGS-.op): Likewise. * NEWS: Mention --enable-static-pie. * config.h.in (ENABLE_STATIC_PIE): New. * configure.ac (--enable-static-pie): New configure option. (have-no-dynamic-linker): New LIBC_CONFIG_VAR. (have-static-pie): Likewise. Enable static PIE if linker supports --no-dynamic-linker. (ENABLE_STATIC_PIE): New AC_DEFINE. (enable-static-pie): New LIBC_CONFIG_VAR. * configure: Regenerated. * csu/Makefile (omit-deps): Add r$(start-installed-name) and gr$(start-installed-name) for --enable-static-pie. (extra-objs): Likewise. (install-lib): Likewise. (extra-objs): Add static-reloc.o and static-reloc.os ($(objpfx)$(start-installed-name)): Also depend on $(objpfx)static-reloc.o. ($(objpfx)r$(start-installed-name)): New. ($(objpfx)g$(start-installed-name)): Also depend on $(objpfx)static-reloc.os. ($(objpfx)gr$(start-installed-name)): New. * csu/libc-start.c (LIBC_START_MAIN): Call _dl_relocate_static_pie in libc.a. * csu/libc-tls.c (__libc_setup_tls): Add main_map->l_addr to initimage. * csu/static-reloc.c: New file. * elf/Makefile (routines): Add dl-reloc-static-pie. (elide-routines.os): Likewise. (DEFAULT-LDFLAGS-tst-tls1-static-non-pie): Removed. (tst-tls1-static-non-pie-no-pie): New. * elf/dl-reloc-static-pie.c: New file. * elf/dl-support.c (_dl_get_dl_main_map): New function. * elf/dynamic-link.h (ELF_DURING_STARTUP): Also check STATIC_PIE_BOOTSTRAP. * elf/get-dynamic-info.h (elf_get_dynamic_info): Likewise. * gmon/Makefile (tests): Add tst-gmon-static-pie. (tests-static): Likewise. (DEFAULT-LDFLAGS-tst-gmon-static): Removed. (tst-gmon-static-no-pie): New. (CFLAGS-tst-gmon-static-pie.c): Likewise. (CRT-tst-gmon-static-pie): Likewise. (tst-gmon-static-pie-ENV): Likewise. (tests-special): Likewise. ($(objpfx)tst-gmon-static-pie.out): Likewise. (clean-tst-gmon-static-pie-data): Likewise. ($(objpfx)tst-gmon-static-pie-gprof.out): Likewise. * gmon/tst-gmon-static-pie.c: New file. * manual/install.texi: Document --enable-static-pie. * sysdeps/generic/ldsodefs.h (_dl_relocate_static_pie): New. (_dl_get_dl_main_map): Likewise. * sysdeps/i386/configure.ac: Check if linker supports static PIE. * sysdeps/x86_64/configure.ac: Likewise. * sysdeps/i386/configure: Regenerated. * sysdeps/x86_64/configure: Likewise. * sysdeps/mips/Makefile (ASFLAGS-.o): Add $(pie-default). (ASFLAGS-.op): Likewise.
2017-12-14elf: Count components of the expanded path in _dl_init_path [BZ #22607]Florian Weimer1-0/+6
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