From 7e20a2238c0ca9cb83f74a60986c3d4a10ac7b48 Mon Sep 17 00:00:00 2001 From: Muminul Islam Date: Mon, 7 Oct 2019 21:50:40 +0000 Subject: glibc: Security fix for cve (From OE-Core rev: d68441ed80fd43f091baf01bfdb47c3ec010c662) Signed-off-by: Muminul Islam CVE: CVE-2019-6488, CVE-2019-7309 Upstream-Status: Backport Signed-off-by: Armin Kuster Signed-off-by: Richard Purdie --- meta/recipes-core/glibc/glibc/CVE-2019-7309.patch | 207 ++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 meta/recipes-core/glibc/glibc/CVE-2019-7309.patch (limited to 'meta/recipes-core/glibc/glibc/CVE-2019-7309.patch') diff --git a/meta/recipes-core/glibc/glibc/CVE-2019-7309.patch b/meta/recipes-core/glibc/glibc/CVE-2019-7309.patch new file mode 100644 index 0000000000..04963c29e4 --- /dev/null +++ b/meta/recipes-core/glibc/glibc/CVE-2019-7309.patch @@ -0,0 +1,207 @@ +From af7f46c45a60e6df754fb6258b546917e61ae6f1 Mon Sep 17 00:00:00 2001 +From: "H.J. Lu" +Date: Mon, 4 Feb 2019 08:55:52 -0800 +Subject: [PATCH] x86-64 memcmp: Use unsigned Jcc instructions on size [BZ + #24155] +Reply-To: muislam@microsoft.com + +Since the size argument is unsigned. we should use unsigned Jcc +instructions, instead of signed, to check size. + +Tested on x86-64 and x32, with and without --disable-multi-arch. + + [BZ #24155] + CVE-2019-7309 + * NEWS: Updated for CVE-2019-7309. + * sysdeps/x86_64/memcmp.S: Use RDX_LP for size. Clear the + upper 32 bits of RDX register for x32. Use unsigned Jcc + instructions, instead of signed. + * sysdeps/x86_64/x32/Makefile (tests): Add tst-size_t-memcmp-2. + * sysdeps/x86_64/x32/tst-size_t-memcmp-2.c: New test. + +(cherry picked from commit 3f635fb43389b54f682fc9ed2acc0b2aaf4a923d) + +Signed-off-by: Muminul Islam + +CVE: CVE-2019-7309 + +Upstream-Status: Backport +--- + sysdeps/x86_64/memcmp.S | 20 +++--- + sysdeps/x86_64/x32/Makefile | 2 +- + sysdeps/x86_64/x32/tst-size_t-memcmp-2.c | 79 ++++++++++++++++++++++++ + 3 files changed, 92 insertions(+), 9 deletions(-) + create mode 100644 sysdeps/x86_64/x32/tst-size_t-memcmp-2.c + +diff --git a/sysdeps/x86_64/memcmp.S b/sysdeps/x86_64/memcmp.S +index bcb4a2e88d..45918d375a 100644 +--- a/sysdeps/x86_64/memcmp.S ++++ b/sysdeps/x86_64/memcmp.S +@@ -21,14 +21,18 @@ + + .text + ENTRY (memcmp) +- test %rdx, %rdx ++#ifdef __ILP32__ ++ /* Clear the upper 32 bits. */ ++ movl %edx, %edx ++#endif ++ test %RDX_LP, %RDX_LP + jz L(finz) + cmpq $1, %rdx +- jle L(finr1b) ++ jbe L(finr1b) + subq %rdi, %rsi + movq %rdx, %r10 + cmpq $32, %r10 +- jge L(gt32) ++ jae L(gt32) + /* Handle small chunks and last block of less than 32 bytes. */ + L(small): + testq $1, %r10 +@@ -156,7 +160,7 @@ L(A32): + movq %r11, %r10 + andq $-32, %r10 + cmpq %r10, %rdi +- jge L(mt16) ++ jae L(mt16) + /* Pre-unroll to be ready for unrolled 64B loop. */ + testq $32, %rdi + jz L(A64) +@@ -178,7 +182,7 @@ L(A64): + movq %r11, %r10 + andq $-64, %r10 + cmpq %r10, %rdi +- jge L(mt32) ++ jae L(mt32) + + L(A64main): + movdqu (%rdi,%rsi), %xmm0 +@@ -216,7 +220,7 @@ L(mt32): + movq %r11, %r10 + andq $-32, %r10 + cmpq %r10, %rdi +- jge L(mt16) ++ jae L(mt16) + + L(A32main): + movdqu (%rdi,%rsi), %xmm0 +@@ -254,7 +258,7 @@ L(ATR): + movq %r11, %r10 + andq $-32, %r10 + cmpq %r10, %rdi +- jge L(mt16) ++ jae L(mt16) + testq $16, %rdi + jz L(ATR32) + +@@ -325,7 +329,7 @@ L(ATR64main): + movq %r11, %r10 + andq $-32, %r10 + cmpq %r10, %rdi +- jge L(mt16) ++ jae L(mt16) + + L(ATR32res): + movdqa (%rdi,%rsi), %xmm0 +diff --git a/sysdeps/x86_64/x32/Makefile b/sysdeps/x86_64/x32/Makefile +index 7d528889c6..c9850beeb5 100644 +--- a/sysdeps/x86_64/x32/Makefile ++++ b/sysdeps/x86_64/x32/Makefile +@@ -6,7 +6,7 @@ CFLAGS-s_llround.c += -fno-builtin-lround + endif + + ifeq ($(subdir),string) +-tests += tst-size_t-memchr ++tests += tst-size_t-memchr tst-size_t-memcmp-2 + endif + + ifeq ($(subdir),wcsmbs) +diff --git a/sysdeps/x86_64/x32/tst-size_t-memcmp-2.c b/sysdeps/x86_64/x32/tst-size_t-memcmp-2.c +new file mode 100644 +index 0000000000..d8ae1a0813 +--- /dev/null ++++ b/sysdeps/x86_64/x32/tst-size_t-memcmp-2.c +@@ -0,0 +1,79 @@ ++/* Test memcmp 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 ++ . */ ++ ++#define TEST_MAIN ++#ifdef WIDE ++# define TEST_NAME "wmemcmp" ++#else ++# define TEST_NAME "memcmp" ++#endif ++ ++#include "test-size_t.h" ++ ++#ifdef WIDE ++# include ++# include ++ ++# define MEMCMP wmemcmp ++# define CHAR wchar_t ++#else ++# define MEMCMP memcmp ++# define CHAR char ++#endif ++ ++IMPL (MEMCMP, 1) ++ ++typedef int (*proto_t) (const CHAR *, const CHAR *, size_t); ++ ++static int ++__attribute__ ((noinline, noclone)) ++do_memcmp (parameter_t a, parameter_t b) ++{ ++ return CALL (&b, a.p, b.p, a.len); ++} ++ ++static int ++test_main (void) ++{ ++ test_init (); ++ ++ parameter_t dest = { { page_size / sizeof (CHAR) }, buf1 }; ++ parameter_t src = { { 0 }, buf2 }; ++ ++ memcpy (buf1, buf2, page_size); ++ ++ CHAR *p = (CHAR *) buf1; ++ p[page_size / sizeof (CHAR) - 1] = (CHAR) 1; ++ ++ int ret = 0; ++ FOR_EACH_IMPL (impl, 0) ++ { ++ src.fn = impl->fn; ++ int res = do_memcmp (dest, src); ++ if (res >= 0) ++ { ++ error (0, 0, "Wrong result in function %s: %i >= 0", ++ impl->name, res); ++ ret = 1; ++ } ++ } ++ ++ return ret ? EXIT_FAILURE : EXIT_SUCCESS; ++} ++ ++#include +-- +2.23.0 + -- cgit v1.2.3-54-g00ecf