diff options
Diffstat (limited to 'meta/recipes-core/glibc/glibc/CVE-2019-6488.patch')
-rw-r--r-- | meta/recipes-core/glibc/glibc/CVE-2019-6488.patch | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/meta/recipes-core/glibc/glibc/CVE-2019-6488.patch b/meta/recipes-core/glibc/glibc/CVE-2019-6488.patch new file mode 100644 index 0000000000..fa423754d4 --- /dev/null +++ b/meta/recipes-core/glibc/glibc/CVE-2019-6488.patch @@ -0,0 +1,274 @@ +From 718016100d889a986c536b595bf6ec0d6ab4b90e Mon Sep 17 00:00:00 2001 +From: "H.J. Lu" <hjl.tools@gmail.com> +Date: Fri, 1 Feb 2019 12:17:09 -0800 +Subject: [PATCH] x86-64 memchr/wmemchr: Properly handle the length parameter + [BZ #24097] +Reply-To: muislam@microsoft.com + +On x32, the size_t parameter may be passed in the lower 32 bits of a +64-bit register with the non-zero upper 32 bits. The string/memory +functions written in assembly can only use the lower 32 bits of a +64-bit register as length or must clear the upper 32 bits before using +the full 64-bit register for length. + +This pach fixes memchr/wmemchr for x32. Tested on x86-64 and x32. On +x86-64, libc.so is the same with and withou the fix. + + [BZ #24097] + CVE-2019-6488 + * sysdeps/x86_64/memchr.S: Use RDX_LP for length. Clear the + upper 32 bits of RDX register. + * sysdeps/x86_64/multiarch/memchr-avx2.S: Likewise. + * sysdeps/x86_64/x32/Makefile (tests): Add tst-size_t-memchr and + tst-size_t-wmemchr. + * sysdeps/x86_64/x32/test-size_t.h: New file. + * sysdeps/x86_64/x32/tst-size_t-memchr.c: Likewise. + * sysdeps/x86_64/x32/tst-size_t-wmemchr.c: Likewise. + +(cherry picked from commit 97700a34f36721b11a754cf37a1cc40695ece1fd) + +CVE: CVE-2019-6488 + +Upstream-Status: Backport + +Signed-off-by: Muminul Islam <muislam@microsoft.com> +--- + NEWS | 1 - + sysdeps/x86_64/memchr.S | 10 ++-- + sysdeps/x86_64/multiarch/memchr-avx2.S | 8 ++- + sysdeps/x86_64/x32/Makefile | 8 +++ + sysdeps/x86_64/x32/test-size_t.h | 35 ++++++++++++ + sysdeps/x86_64/x32/tst-size_t-memchr.c | 72 +++++++++++++++++++++++++ + sysdeps/x86_64/x32/tst-size_t-wmemchr.c | 20 +++++++ + 7 files changed, 148 insertions(+), 6 deletions(-) + create mode 100644 sysdeps/x86_64/x32/test-size_t.h + create mode 100644 sysdeps/x86_64/x32/tst-size_t-memchr.c + create mode 100644 sysdeps/x86_64/x32/tst-size_t-wmemchr.c + +diff --git a/NEWS b/NEWS +index fd14941128..b158973a30 100644 +--- a/NEWS ++++ b/NEWS +@@ -17,7 +17,6 @@ The following bugs are resolved with this release: + [23606] Missing ENDBR32 in sysdeps/i386/start.S + [23679] gethostid: Missing NULL check for gethostbyname_r result + [23717] Fix stack overflow in stdlib/tst-setcontext9 +- + + Version 2.28 + +diff --git a/sysdeps/x86_64/memchr.S b/sysdeps/x86_64/memchr.S +index feef5d4f24..cb320257a2 100644 +--- a/sysdeps/x86_64/memchr.S ++++ b/sysdeps/x86_64/memchr.S +@@ -34,12 +34,16 @@ ENTRY(MEMCHR) + mov %edi, %ecx + + #ifdef USE_AS_WMEMCHR +- test %rdx, %rdx ++ test %RDX_LP, %RDX_LP + jz L(return_null) +- shl $2, %rdx ++ shl $2, %RDX_LP + #else ++# ifdef __ILP32__ ++ /* Clear the upper 32 bits. */ ++ movl %edx, %edx ++# endif + punpcklbw %xmm1, %xmm1 +- test %rdx, %rdx ++ test %RDX_LP, %RDX_LP + jz L(return_null) + punpcklbw %xmm1, %xmm1 + #endif +diff --git a/sysdeps/x86_64/multiarch/memchr-avx2.S b/sysdeps/x86_64/multiarch/memchr-avx2.S +index 5f5e772554..c81da19bf0 100644 +--- a/sysdeps/x86_64/multiarch/memchr-avx2.S ++++ b/sysdeps/x86_64/multiarch/memchr-avx2.S +@@ -40,16 +40,20 @@ + ENTRY (MEMCHR) + # ifndef USE_AS_RAWMEMCHR + /* Check for zero length. */ +- testq %rdx, %rdx ++ test %RDX_LP, %RDX_LP + jz L(null) + # endif + movl %edi, %ecx + /* Broadcast CHAR to YMM0. */ + vmovd %esi, %xmm0 + # ifdef USE_AS_WMEMCHR +- shl $2, %rdx ++ shl $2, %RDX_LP + vpbroadcastd %xmm0, %ymm0 + # else ++# ifdef __ILP32__ ++ /* Clear the upper 32 bits. */ ++ movl %edx, %edx ++# endif + vpbroadcastb %xmm0, %ymm0 + # endif + /* Check if we may cross page boundary with one vector load. */ +diff --git a/sysdeps/x86_64/x32/Makefile b/sysdeps/x86_64/x32/Makefile +index f2ebc24fb0..7d528889c6 100644 +--- a/sysdeps/x86_64/x32/Makefile ++++ b/sysdeps/x86_64/x32/Makefile +@@ -4,3 +4,11 @@ ifeq ($(subdir),math) + # 64-bit llround. Add -fno-builtin-lround to silence the compiler. + CFLAGS-s_llround.c += -fno-builtin-lround + endif ++ ++ifeq ($(subdir),string) ++tests += tst-size_t-memchr ++endif ++ ++ifeq ($(subdir),wcsmbs) ++tests += tst-size_t-wmemchr ++endif +diff --git a/sysdeps/x86_64/x32/test-size_t.h b/sysdeps/x86_64/x32/test-size_t.h +new file mode 100644 +index 0000000000..78a940863e +--- /dev/null ++++ b/sysdeps/x86_64/x32/test-size_t.h +@@ -0,0 +1,35 @@ ++/* Test string/memory functions with size_t in the lower 32 bits of ++ 64-bit register. ++ Copyright (C) 2019 Free Software Foundation, Inc. ++ This file is part of the GNU C Library. ++ ++ The GNU C Library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Lesser General Public ++ License as published by the Free Software Foundation; either ++ version 2.1 of the License, or (at your option) any later version. ++ ++ The GNU C Library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Lesser General Public License for more details. ++ ++ You should have received a copy of the GNU Lesser General Public ++ License along with the GNU C Library; if not, see ++ <http://www.gnu.org/licenses/>. */ ++ ++#define TEST_MAIN ++#include <string/test-string.h> ++ ++/* On x32, parameter_t may be passed in a 64-bit register with the LEN ++ field in the lower 32 bits. When the LEN field of 64-bit register ++ is passed to string/memory function as the size_t parameter, only ++ the lower 32 bits can be used. */ ++typedef struct ++{ ++ union ++ { ++ size_t len; ++ void (*fn) (void); ++ }; ++ void *p; ++} parameter_t; +diff --git a/sysdeps/x86_64/x32/tst-size_t-memchr.c b/sysdeps/x86_64/x32/tst-size_t-memchr.c +new file mode 100644 +index 0000000000..29a3daf102 +--- /dev/null ++++ b/sysdeps/x86_64/x32/tst-size_t-memchr.c +@@ -0,0 +1,72 @@ ++/* Test memchr with size_t in the lower 32 bits of 64-bit register. ++ Copyright (C) 2019 Free Software Foundation, Inc. ++ This file is part of the GNU C Library. ++ ++ The GNU C Library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Lesser General Public ++ License as published by the Free Software Foundation; either ++ version 2.1 of the License, or (at your option) any later version. ++ ++ The GNU C Library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Lesser General Public License for more details. ++ ++ You should have received a copy of the GNU Lesser General Public ++ License along with the GNU C Library; if not, see ++ <http://www.gnu.org/licenses/>. */ ++ ++#ifndef WIDE ++# define TEST_NAME "memchr" ++#else ++# define TEST_NAME "wmemchr" ++#endif /* WIDE */ ++#include "test-size_t.h" ++ ++#ifndef WIDE ++# define MEMCHR memchr ++# define CHAR char ++# define UCHAR unsigned char ++#else ++# include <wchar.h> ++# define MEMCHR wmemchr ++# define CHAR wchar_t ++# define UCHAR wchar_t ++#endif /* WIDE */ ++ ++IMPL (MEMCHR, 1) ++ ++typedef CHAR * (*proto_t) (const CHAR*, int, size_t); ++ ++static CHAR * ++__attribute__ ((noinline, noclone)) ++do_memchr (parameter_t a, parameter_t b) ++{ ++ return CALL (&b, a.p, (uintptr_t) b.p, a.len); ++} ++ ++static int ++test_main (void) ++{ ++ test_init (); ++ ++ parameter_t src = { { page_size / sizeof (CHAR) }, buf2 }; ++ parameter_t c = { { 0 }, (void *) (uintptr_t) 0x12 }; ++ ++ int ret = 0; ++ FOR_EACH_IMPL (impl, 0) ++ { ++ c.fn = impl->fn; ++ CHAR *res = do_memchr (src, c); ++ if (res) ++ { ++ error (0, 0, "Wrong result in function %s: %p != NULL", ++ impl->name, res); ++ ret = 1; ++ } ++ } ++ ++ return ret ? EXIT_FAILURE : EXIT_SUCCESS; ++} ++ ++#include <support/test-driver.c> +diff --git a/sysdeps/x86_64/x32/tst-size_t-wmemchr.c b/sysdeps/x86_64/x32/tst-size_t-wmemchr.c +new file mode 100644 +index 0000000000..877801d646 +--- /dev/null ++++ b/sysdeps/x86_64/x32/tst-size_t-wmemchr.c +@@ -0,0 +1,20 @@ ++/* Test wmemchr with size_t in the lower 32 bits of 64-bit register. ++ Copyright (C) 2019 Free Software Foundation, Inc. ++ This file is part of the GNU C Library. ++ ++ The GNU C Library is free software; you can redistribute it and/or ++ modify it under the terms of the GNU Lesser General Public ++ License as published by the Free Software Foundation; either ++ version 2.1 of the License, or (at your option) any later version. ++ ++ The GNU C Library is distributed in the hope that it will be useful, ++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ Lesser General Public License for more details. ++ ++ You should have received a copy of the GNU Lesser General Public ++ License along with the GNU C Library; if not, see ++ <http://www.gnu.org/licenses/>. */ ++ ++#define WIDE 1 ++#include "tst-size_t-memchr.c" +-- +2.23.0 + |