mirror of
https://sourceware.org/git/glibc.git
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ee8d5e33ad
realpath returns an allocated string when the result exceeds PATH_MAX, which is unexpected when its second argument is not NULL. This results in the second argument (resolved) being uninitialized and also results in a memory leak since the caller expects resolved to be the same as the returned value. Return NULL and set errno to ENAMETOOLONG if the result exceeds PATH_MAX. This fixes [BZ #28770], which is CVE-2021-3998. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
301 lines
9.2 KiB
Makefile
301 lines
9.2 KiB
Makefile
# Copyright (C) 1991-2022 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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#
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# Makefile for stdlib routines
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#
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subdir := stdlib
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include ../Makeconfig
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headers := stdlib.h bits/stdlib.h bits/stdlib-ldbl.h bits/stdlib-float.h \
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monetary.h bits/monetary-ldbl.h \
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inttypes.h stdint.h bits/wordsize.h bits/timesize.h \
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errno.h sys/errno.h bits/errno.h bits/types/error_t.h \
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ucontext.h sys/ucontext.h bits/indirect-return.h \
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alloca.h fmtmsg.h \
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bits/stdlib-bsearch.h sys/random.h bits/stdint-intn.h \
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bits/stdint-uintn.h bits/time64.h \
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routines := \
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atof atoi atol atoll \
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abort \
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bsearch qsort msort \
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getenv putenv setenv secure-getenv \
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exit on_exit atexit cxa_atexit cxa_finalize old_atexit \
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quick_exit at_quick_exit cxa_at_quick_exit cxa_thread_atexit_impl \
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abs labs llabs \
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div ldiv lldiv \
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mblen mbstowcs mbtowc wcstombs wctomb \
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random random_r rand rand_r \
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drand48 erand48 lrand48 nrand48 mrand48 jrand48 \
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srand48 seed48 lcong48 \
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drand48_r erand48_r lrand48_r nrand48_r mrand48_r jrand48_r \
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srand48_r seed48_r lcong48_r \
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drand48-iter getrandom getentropy \
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strfromf strfromd strfroml \
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strtol strtoul strtoll strtoull \
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strtol_l strtoul_l strtoll_l strtoull_l \
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strtof strtod strtold \
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strtof_l strtod_l strtold_l \
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strtof_nan strtod_nan strtold_nan \
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system canonicalize \
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a64l l64a \
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rpmatch strfmon strfmon_l getsubopt xpg_basename fmtmsg \
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getcontext setcontext makecontext swapcontext
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aux = grouping groupingwc tens_in_limb
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# These routines will be omitted from the libc shared object.
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# Instead the static object files will be included in a special archive
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# linked against when the shared library will be used.
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static-only-routines = atexit at_quick_exit
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test-srcs := tst-fmtmsg
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tests := \
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bug-fmtmsg1 \
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bug-getcontext \
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bug-strtod \
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bug-strtod2 \
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test-a64l \
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test-at_quick_exit-race \
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test-atexit-race \
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test-bz22786 \
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test-canon \
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test-canon2 \
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test-cxa_atexit-race \
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test-cxa_atexit-race2 \
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test-dlclose-exit-race \
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test-on_exit-race \
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testdiv \
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testmb \
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testmb2 \
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testrand \
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testsort \
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tst-at_quick_exit \
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tst-atexit \
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tst-atof1 \
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tst-atof2 \
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tst-bsearch \
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tst-bz20544 \
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tst-canon-bz26341 \
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tst-cxa_atexit \
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tst-environ \
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tst-getrandom \
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tst-limits \
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tst-makecontext \
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tst-makecontext-align \
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tst-makecontext2 \
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tst-makecontext3 \
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tst-on_exit \
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tst-qsort \
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tst-qsort2 \
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tst-quick_exit \
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tst-rand48 \
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tst-rand48-2 \
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tst-random \
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tst-random2 \
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tst-realpath \
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tst-realpath-toolong \
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tst-secure-getenv \
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tst-setcontext \
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tst-setcontext2 \
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tst-setcontext3 \
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tst-setcontext4 \
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tst-setcontext5 \
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tst-setcontext6 \
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tst-setcontext7 \
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tst-setcontext8 \
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tst-setcontext9 \
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tst-strfmon_l \
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tst-strfrom \
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tst-strfrom-locale \
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tst-strtod \
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tst-strtod-nan-locale \
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tst-strtod-nan-sign \
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tst-strtod-overflow \
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tst-strtod-round \
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tst-strtod-underflow \
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tst-strtod2 \
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tst-strtod5 \
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tst-strtod6 \
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tst-strtol \
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tst-strtol-locale \
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tst-strtoll \
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tst-swapcontext1 \
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tst-thread-quick_exit \
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tst-tininess \
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tst-unsetenv1 \
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tst-width \
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tst-width-stdint \
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tst-xpg-basename \
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# tests
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tests-internal := tst-strtod1i tst-strtod3 tst-strtod4 tst-strtod5i \
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tst-tls-atexit tst-tls-atexit-nodelete
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tests-static := tst-secure-getenv
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tests-container := tst-system
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ifeq ($(build-hardcoded-path-in-tests),yes)
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tests += tst-empty-env
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endif
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LDLIBS-test-atexit-race = $(shared-thread-library)
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LDLIBS-test-at_quick_exit-race = $(shared-thread-library)
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LDLIBS-test-cxa_atexit-race = $(shared-thread-library)
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LDLIBS-test-cxa_atexit-race2 = $(shared-thread-library)
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LDLIBS-test-on_exit-race = $(shared-thread-library)
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LDLIBS-tst-canon-bz26341 = $(shared-thread-library)
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LDLIBS-test-dlclose-exit-race = $(shared-thread-library)
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LDFLAGS-test-dlclose-exit-race = $(LDFLAGS-rdynamic)
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LDLIBS-test-dlclose-exit-race-helper.so = $(libsupport) $(shared-thread-library)
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ifeq ($(have-cxx-thread_local),yes)
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CFLAGS-tst-quick_exit.o = -std=c++11
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LDLIBS-tst-quick_exit = -lstdc++
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CFLAGS-tst-thread-quick_exit.o = -std=c++11
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LDLIBS-tst-thread-quick_exit = -lstdc++
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$(objpfx)tst-thread-quick_exit: $(shared-thread-library)
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else
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tests-unsupported += tst-quick_exit tst-thread-quick_exit
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endif
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modules-names = tst-tls-atexit-lib test-dlclose-exit-race-helper
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extra-test-objs += $(addsuffix .os, $(modules-names))
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ifeq ($(build-shared),yes)
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tests += tst-putenv
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endif
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# Several mpn functions from GNU MP are used by the strtod function.
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mpn-routines := inlines add_n addmul_1 cmp divmod_1 divrem udiv_qrnnd \
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lshift rshift mod_1 mul mul_1 mul_n sub_n submul_1
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mpn-headers = longlong.h gmp.h gmp-impl.h gmp-mparam.h asm-syntax.h
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routines := $(strip $(routines) $(mpn-routines)) \
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dbl2mpn ldbl2mpn \
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mpn2flt mpn2dbl mpn2ldbl
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aux += fpioconst mp_clz_tab
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tests-extras += tst-putenvmod
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extra-test-objs += tst-putenvmod.os
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generated += isomac isomac.out tst-putenvmod.so
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CFLAGS-bsearch.c += $(uses-callbacks)
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CFLAGS-msort.c += $(uses-callbacks)
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CFLAGS-qsort.c += $(uses-callbacks)
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CFLAGS-system.c += -fexceptions
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CFLAGS-system.os = -fomit-frame-pointer
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CFLAGS-fmtmsg.c += -fexceptions
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CFLAGS-strfmon.c += $(libio-mtsafe)
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CFLAGS-strfmon_l.c += $(libio-mtsafe)
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# The strfrom class of functions call __printf_fp in order to convert the
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# floating-point value to characters. This requires the value of IO_MTSAFE_IO.
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CFLAGS-strfromd.c += $(libio-mtsafe)
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CFLAGS-strfromf.c += $(libio-mtsafe)
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CFLAGS-strfroml.c += $(libio-mtsafe)
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CFLAGS-tst-bsearch.c += $(stack-align-test-flags)
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CFLAGS-tst-qsort.c += $(stack-align-test-flags)
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CFLAGS-tst-makecontext.c += -funwind-tables
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CFLAGS-tst-makecontext2.c += $(stack-align-test-flags)
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# Run a test on the header files we use.
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tests-special += $(objpfx)isomac.out
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ifeq ($(run-built-tests),yes)
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tests-special += $(objpfx)tst-fmtmsg.out
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endif
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include ../Rules
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ifeq ($(run-built-tests),yes)
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LOCALES := cs_CZ.UTF-8 de_DE.UTF-8 en_US.ISO-8859-1 tr_TR.UTF-8 \
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tr_TR.ISO-8859-9 tg_TJ.UTF-8 hr_HR.UTF-8 hi_IN.UTF-8 \
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el_GR.UTF-8
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include ../gen-locales.mk
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$(objpfx)bug-strtod2.out: $(gen-locales)
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$(objpfx)testmb2.out: $(gen-locales)
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$(objpfx)tst-strtod.out: $(gen-locales)
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$(objpfx)tst-strtod1i.out: $(gen-locales)
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$(objpfx)tst-strtod3.out: $(gen-locales)
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$(objpfx)tst-strtod4.out: $(gen-locales)
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$(objpfx)tst-strtod5.out: $(gen-locales)
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$(objpfx)tst-strtod5i.out: $(gen-locales)
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$(objpfx)tst-strtol-locale.out: $(gen-locales)
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$(objpfx)tst-strtod-nan-locale.out: $(gen-locales)
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$(objpfx)tst-strfmon_l.out: $(gen-locales)
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$(objpfx)tst-strfrom.out: $(gen-locales)
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$(objpfx)tst-strfrom-locale.out: $(gen-locales)
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$(objpfx)test-dlclose-exit-race.out: $(objpfx)test-dlclose-exit-race-helper.so
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endif
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# Testdir has to be named stdlib and needs to be writable
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test-canon-ARGS = --test-dir=${common-objpfx}stdlib
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bug-fmtmsg1-ENV = SEV_LEVEL=foo,11,newsev
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$(objpfx)isomac.out: $(objpfx)isomac
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$(dir $<)$(notdir $<) '$(CC)' \
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'-I../include $(+sysdep-includes) $(sysincludes) -I..' > $@; \
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$(evaluate-test)
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isomac-CFLAGS = -O
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$(objpfx)isomac: isomac.c
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$(native-compile)
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$(objpfx)tst-fmtmsg.out: tst-fmtmsg.sh $(objpfx)tst-fmtmsg
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$(SHELL) $< $(common-objpfx) '$(test-program-prefix-before-env)' \
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'$(run-program-env)' '$(test-program-prefix-after-env)' \
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$(common-objpfx)stdlib/; \
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$(evaluate-test)
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$(objpfx)tst-putenv: $(objpfx)tst-putenvmod.so
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LDFLAGS-tst-putenv = -Wl,--no-as-needed
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$(objpfx)tst-putenvmod.so: $(objpfx)tst-putenvmod.os $(link-libc-deps)
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$(build-module)
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libof-tst-putenvmod = extramodules
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$(objpfx)bug-getcontext: $(libm)
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$(objpfx)bug-strtod2: $(libm)
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$(objpfx)tst-strtod-round: $(libm)
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$(objpfx)tst-tininess: $(libm)
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$(objpfx)tst-strtod-underflow: $(libm)
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$(objpfx)tst-strtod6: $(libm)
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$(objpfx)tst-strtod-nan-locale: $(libm)
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$(objpfx)tst-strtod-nan-sign: $(libm)
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tst-tls-atexit-lib.so-no-z-defs = yes
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test-dlclose-exit-race-helper.so-no-z-defs = yes
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$(objpfx)tst-tls-atexit: $(shared-thread-library)
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$(objpfx)tst-tls-atexit.out: $(objpfx)tst-tls-atexit-lib.so
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$(objpfx)tst-tls-atexit-nodelete: $(shared-thread-library)
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$(objpfx)tst-tls-atexit-nodelete.out: $(objpfx)tst-tls-atexit-lib.so
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$(objpfx)tst-setcontext3.out: tst-setcontext3.sh $(objpfx)tst-setcontext3
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$(SHELL) $< $(common-objpfx) '$(test-program-prefix-before-env)' \
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'$(run-program-env)' '$(test-program-prefix-after-env)' \
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$(common-objpfx)stdlib/; \
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$(evaluate-test)
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