From a981d9b753a13e100af1f654fb3384f0bcda0b65 Mon Sep 17 00:00:00 2001 From: Yi Zhao Date: Tue, 29 Oct 2019 10:47:29 +0100 Subject: libgcrypt: fix CVE-2019-12904 In Libgcrypt 1.8.4, the C implementation of AES is vulnerable to a flush-and-reload side-channel attack because physical addresses are available to other processes. (The C implementation is used on platforms where an assembly-language implementation is unavailable.) Reference: https://nvd.nist.gov/vuln/detail/CVE-2019-12904 Patches from: https://github.com/gpg/libgcrypt/commit/1374254c2904ab5b18ba4a890856824a102d4705 https://github.com/gpg/libgcrypt/commit/daedbbb5541cd8ecda1459d3b843ea4d92788762 https://github.com/gpg/libgcrypt/commit/a4c561aab1014c3630bc88faf6f5246fee16b020 Signed-off-by: Yi Zhao Signed-off-by: Ross Burton (cherry picked from commit 37e390ff05b6a4509019db358ed496731d80cc51) Signed-off-by: Armin Kuster (cherry picked from commit 4c207cb1ad46c0d2005ab3eae70d78c937e084b5) Signed-off-by: Armin Kuster Signed-off-by: Richard Purdie --- .../files/0001-Prefetch-GCM-look-up-tables.patch | 90 ++++++ ...ok-up-tables-to-.data-section-and-unshare.patch | 332 +++++++++++++++++++++ ...ok-up-table-to-.data-section-and-unshare-.patch | 178 +++++++++++ meta/recipes-support/libgcrypt/libgcrypt_1.8.4.bb | 3 + 4 files changed, 603 insertions(+) create mode 100644 meta/recipes-support/libgcrypt/files/0001-Prefetch-GCM-look-up-tables.patch create mode 100644 meta/recipes-support/libgcrypt/files/0002-AES-move-look-up-tables-to-.data-section-and-unshare.patch create mode 100644 meta/recipes-support/libgcrypt/files/0003-GCM-move-look-up-table-to-.data-section-and-unshare-.patch diff --git a/meta/recipes-support/libgcrypt/files/0001-Prefetch-GCM-look-up-tables.patch b/meta/recipes-support/libgcrypt/files/0001-Prefetch-GCM-look-up-tables.patch new file mode 100644 index 0000000000..4df96f0011 --- /dev/null +++ b/meta/recipes-support/libgcrypt/files/0001-Prefetch-GCM-look-up-tables.patch @@ -0,0 +1,90 @@ +From 1374254c2904ab5b18ba4a890856824a102d4705 Mon Sep 17 00:00:00 2001 +From: Jussi Kivilinna +Date: Sat, 27 Apr 2019 19:33:28 +0300 +Subject: [PATCH 1/3] Prefetch GCM look-up tables + +* cipher/cipher-gcm.c (prefetch_table, do_prefetch_tables) +(prefetch_tables): New. +(ghash_internal): Call prefetch_tables. +-- + +Signed-off-by: Jussi Kivilinna + +Upstream-Status: Backport +[https://github.com/gpg/libgcrypt/commit/1374254c2904ab5b18ba4a890856824a102d4705] + +CVE: CVE-2019-12904 + +Signed-off-by: Yi Zhao +--- + cipher/cipher-gcm.c | 33 +++++++++++++++++++++++++++++++++ + 1 file changed, 33 insertions(+) + +diff --git a/cipher/cipher-gcm.c b/cipher/cipher-gcm.c +index c19f09f..11f119a 100644 +--- a/cipher/cipher-gcm.c ++++ b/cipher/cipher-gcm.c +@@ -118,6 +118,34 @@ static const u16 gcmR[256] = { + 0xbbf0, 0xba32, 0xb874, 0xb9b6, 0xbcf8, 0xbd3a, 0xbf7c, 0xbebe, + }; + ++static inline ++void prefetch_table(const void *tab, size_t len) ++{ ++ const volatile byte *vtab = tab; ++ size_t i; ++ ++ for (i = 0; i < len; i += 8 * 32) ++ { ++ (void)vtab[i + 0 * 32]; ++ (void)vtab[i + 1 * 32]; ++ (void)vtab[i + 2 * 32]; ++ (void)vtab[i + 3 * 32]; ++ (void)vtab[i + 4 * 32]; ++ (void)vtab[i + 5 * 32]; ++ (void)vtab[i + 6 * 32]; ++ (void)vtab[i + 7 * 32]; ++ } ++ ++ (void)vtab[len - 1]; ++} ++ ++static inline void ++do_prefetch_tables (const void *gcmM, size_t gcmM_size) ++{ ++ prefetch_table(gcmM, gcmM_size); ++ prefetch_table(gcmR, sizeof(gcmR)); ++} ++ + #ifdef GCM_TABLES_USE_U64 + static void + bshift (u64 * b0, u64 * b1) +@@ -365,6 +393,8 @@ do_ghash (unsigned char *result, const unsigned char *buf, const u32 *gcmM) + #define fillM(c) \ + do_fillM (c->u_mode.gcm.u_ghash_key.key, c->u_mode.gcm.gcm_table) + #define GHASH(c, result, buf) do_ghash (result, buf, c->u_mode.gcm.gcm_table) ++#define prefetch_tables(c) \ ++ do_prefetch_tables(c->u_mode.gcm.gcm_table, sizeof(c->u_mode.gcm.gcm_table)) + + #else + +@@ -430,6 +460,7 @@ do_ghash (unsigned char *hsub, unsigned char *result, const unsigned char *buf) + + #define fillM(c) do { } while (0) + #define GHASH(c, result, buf) do_ghash (c->u_mode.gcm.u_ghash_key.key, result, buf) ++#define prefetch_tables(c) do {} while (0) + + #endif /* !GCM_USE_TABLES */ + +@@ -441,6 +472,8 @@ ghash_internal (gcry_cipher_hd_t c, byte *result, const byte *buf, + const unsigned int blocksize = GCRY_GCM_BLOCK_LEN; + unsigned int burn = 0; + ++ prefetch_tables (c); ++ + while (nblocks) + { + burn = GHASH (c, result, buf); +-- +2.7.4 + diff --git a/meta/recipes-support/libgcrypt/files/0002-AES-move-look-up-tables-to-.data-section-and-unshare.patch b/meta/recipes-support/libgcrypt/files/0002-AES-move-look-up-tables-to-.data-section-and-unshare.patch new file mode 100644 index 0000000000..c82c5b5c8a --- /dev/null +++ b/meta/recipes-support/libgcrypt/files/0002-AES-move-look-up-tables-to-.data-section-and-unshare.patch @@ -0,0 +1,332 @@ +From 119348dd9aa52ab229afb5e2d3342d2b76fe81bf Mon Sep 17 00:00:00 2001 +From: Jussi Kivilinna +Date: Fri, 31 May 2019 17:18:09 +0300 +Subject: [PATCH 2/3] AES: move look-up tables to .data section and unshare between + processes + +* cipher/rijndael-internal.h (ATTR_ALIGNED_64): New. +* cipher/rijndael-tables.h (encT): Move to 'enc_tables' structure. +(enc_tables): New structure for encryption table with counters before +and after. +(encT): New macro. +(dec_tables): Add counters before and after encryption table; Move +from .rodata to .data section. +(do_encrypt): Change 'encT' to 'enc_tables.T'. +(do_decrypt): Change '&dec_tables' to 'dec_tables.T'. +* cipher/cipher-gcm.c (prefetch_table): Make inline; Handle input +with length not multiple of 256. +(prefetch_enc, prefetch_dec): Modify pre- and post-table counters +to unshare look-up table pages between processes. +-- + +GnuPG-bug-id: 4541 +Signed-off-by: Jussi Kivilinna + +Upstream-Status: Backport +[https://github.com/gpg/libgcrypt/commit/daedbbb5541cd8ecda1459d3b843ea4d92788762] + +CVE: CVE-2019-12904 + +Signed-off-by: Yi Zhao +--- + cipher/rijndael-internal.h | 4 +- + cipher/rijndael-tables.h | 155 +++++++++++++++++++++++++-------------------- + cipher/rijndael.c | 35 ++++++++-- + 3 files changed, 118 insertions(+), 76 deletions(-) + +diff --git a/cipher/rijndael-internal.h b/cipher/rijndael-internal.h +index 160fb8c..a62d4b7 100644 +--- a/cipher/rijndael-internal.h ++++ b/cipher/rijndael-internal.h +@@ -29,11 +29,13 @@ + #define BLOCKSIZE (128/8) + + +-/* Helper macro to force alignment to 16 bytes. */ ++/* Helper macro to force alignment to 16 or 64 bytes. */ + #ifdef HAVE_GCC_ATTRIBUTE_ALIGNED + # define ATTR_ALIGNED_16 __attribute__ ((aligned (16))) ++# define ATTR_ALIGNED_64 __attribute__ ((aligned (64))) + #else + # define ATTR_ALIGNED_16 ++# define ATTR_ALIGNED_64 + #endif + + +diff --git a/cipher/rijndael-tables.h b/cipher/rijndael-tables.h +index 8359470..b54d959 100644 +--- a/cipher/rijndael-tables.h ++++ b/cipher/rijndael-tables.h +@@ -21,80 +21,98 @@ + /* To keep the actual implementation at a readable size we use this + include file to define the tables. */ + +-static const u32 encT[256] = ++static struct ++{ ++ volatile u32 counter_head; ++ u32 cacheline_align[64 / 4 - 1]; ++ u32 T[256]; ++ volatile u32 counter_tail; ++} enc_tables ATTR_ALIGNED_64 = + { +- 0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6, +- 0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591, +- 0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56, +- 0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec, +- 0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa, +- 0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb, +- 0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45, +- 0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b, +- 0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c, +- 0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83, +- 0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9, +- 0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a, +- 0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d, +- 0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f, +- 0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df, +- 0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea, +- 0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34, +- 0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b, +- 0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d, +- 0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413, +- 0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1, +- 0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6, +- 0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972, +- 0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85, +- 0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed, +- 0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511, +- 0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe, +- 0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b, +- 0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05, +- 0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1, +- 0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142, +- 0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf, +- 0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3, +- 0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e, +- 0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a, +- 0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6, +- 0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3, +- 0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b, +- 0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428, +- 0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad, +- 0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14, +- 0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8, +- 0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4, +- 0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2, +- 0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda, +- 0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949, +- 0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf, +- 0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810, +- 0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c, +- 0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697, +- 0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e, +- 0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f, +- 0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc, +- 0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c, +- 0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969, +- 0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27, +- 0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122, +- 0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433, +- 0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9, +- 0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5, +- 0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a, +- 0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0, +- 0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e, +- 0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c ++ 0, ++ { 0, }, ++ { ++ 0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6, ++ 0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591, ++ 0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56, ++ 0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec, ++ 0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa, ++ 0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb, ++ 0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45, ++ 0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b, ++ 0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c, ++ 0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83, ++ 0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9, ++ 0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a, ++ 0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d, ++ 0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f, ++ 0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df, ++ 0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea, ++ 0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34, ++ 0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b, ++ 0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d, ++ 0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413, ++ 0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1, ++ 0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6, ++ 0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972, ++ 0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85, ++ 0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed, ++ 0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511, ++ 0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe, ++ 0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b, ++ 0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05, ++ 0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1, ++ 0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142, ++ 0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf, ++ 0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3, ++ 0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e, ++ 0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a, ++ 0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6, ++ 0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3, ++ 0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b, ++ 0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428, ++ 0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad, ++ 0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14, ++ 0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8, ++ 0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4, ++ 0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2, ++ 0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda, ++ 0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949, ++ 0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf, ++ 0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810, ++ 0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c, ++ 0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697, ++ 0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e, ++ 0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f, ++ 0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc, ++ 0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c, ++ 0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969, ++ 0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27, ++ 0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122, ++ 0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433, ++ 0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9, ++ 0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5, ++ 0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a, ++ 0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0, ++ 0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e, ++ 0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c ++ }, ++ 0 + }; + +-static const struct ++#define encT enc_tables.T ++ ++static struct + { ++ volatile u32 counter_head; ++ u32 cacheline_align[64 / 4 - 1]; + u32 T[256]; + byte inv_sbox[256]; +-} dec_tables = ++ volatile u32 counter_tail; ++} dec_tables ATTR_ALIGNED_64 = + { ++ 0, ++ { 0, }, + { + 0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a, + 0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b, +@@ -194,7 +212,8 @@ static const struct + 0xc8,0xeb,0xbb,0x3c,0x83,0x53,0x99,0x61, + 0x17,0x2b,0x04,0x7e,0xba,0x77,0xd6,0x26, + 0xe1,0x69,0x14,0x63,0x55,0x21,0x0c,0x7d +- } ++ }, ++ 0 + }; + + #define decT dec_tables.T +diff --git a/cipher/rijndael.c b/cipher/rijndael.c +index 8637195..d0edab2 100644 +--- a/cipher/rijndael.c ++++ b/cipher/rijndael.c +@@ -227,11 +227,11 @@ static const char *selftest(void); + + + /* Prefetching for encryption/decryption tables. */ +-static void prefetch_table(const volatile byte *tab, size_t len) ++static inline void prefetch_table(const volatile byte *tab, size_t len) + { + size_t i; + +- for (i = 0; i < len; i += 8 * 32) ++ for (i = 0; len - i >= 8 * 32; i += 8 * 32) + { + (void)tab[i + 0 * 32]; + (void)tab[i + 1 * 32]; +@@ -242,17 +242,37 @@ static void prefetch_table(const volatile byte *tab, size_t len) + (void)tab[i + 6 * 32]; + (void)tab[i + 7 * 32]; + } ++ for (; i < len; i += 32) ++ { ++ (void)tab[i]; ++ } + + (void)tab[len - 1]; + } + + static void prefetch_enc(void) + { +- prefetch_table((const void *)encT, sizeof(encT)); ++ /* Modify counters to trigger copy-on-write and unsharing if physical pages ++ * of look-up table are shared between processes. Modifying counters also ++ * causes checksums for pages to change and hint same-page merging algorithm ++ * that these pages are frequently changing. */ ++ enc_tables.counter_head++; ++ enc_tables.counter_tail++; ++ ++ /* Prefetch look-up tables to cache. */ ++ prefetch_table((const void *)&enc_tables, sizeof(enc_tables)); + } + + static void prefetch_dec(void) + { ++ /* Modify counters to trigger copy-on-write and unsharing if physical pages ++ * of look-up table are shared between processes. Modifying counters also ++ * causes checksums for pages to change and hint same-page merging algorithm ++ * that these pages are frequently changing. */ ++ dec_tables.counter_head++; ++ dec_tables.counter_tail++; ++ ++ /* Prefetch look-up tables to cache. */ + prefetch_table((const void *)&dec_tables, sizeof(dec_tables)); + } + +@@ -737,7 +757,7 @@ do_encrypt (const RIJNDAEL_context *ctx, + #ifdef USE_AMD64_ASM + # ifdef HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS + return _gcry_aes_amd64_encrypt_block(ctx->keyschenc, bx, ax, ctx->rounds, +- encT); ++ enc_tables.T); + # else + /* Call SystemV ABI function without storing non-volatile XMM registers, + * as target function does not use vector instruction sets. */ +@@ -757,7 +777,8 @@ do_encrypt (const RIJNDAEL_context *ctx, + return ret; + # endif /* HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS */ + #elif defined(USE_ARM_ASM) +- return _gcry_aes_arm_encrypt_block(ctx->keyschenc, bx, ax, ctx->rounds, encT); ++ return _gcry_aes_arm_encrypt_block(ctx->keyschenc, bx, ax, ctx->rounds, ++ enc_tables.T); + #else + return do_encrypt_fn (ctx, bx, ax); + #endif /* !USE_ARM_ASM && !USE_AMD64_ASM*/ +@@ -1120,7 +1141,7 @@ do_decrypt (const RIJNDAEL_context *ctx, unsigned char *bx, + #ifdef USE_AMD64_ASM + # ifdef HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS + return _gcry_aes_amd64_decrypt_block(ctx->keyschdec, bx, ax, ctx->rounds, +- &dec_tables); ++ dec_tables.T); + # else + /* Call SystemV ABI function without storing non-volatile XMM registers, + * as target function does not use vector instruction sets. */ +@@ -1141,7 +1162,7 @@ do_decrypt (const RIJNDAEL_context *ctx, unsigned char *bx, + # endif /* HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS */ + #elif defined(USE_ARM_ASM) + return _gcry_aes_arm_decrypt_block(ctx->keyschdec, bx, ax, ctx->rounds, +- &dec_tables); ++ dec_tables.T); + #else + return do_decrypt_fn (ctx, bx, ax); + #endif /*!USE_ARM_ASM && !USE_AMD64_ASM*/ +-- +2.7.4 + diff --git a/meta/recipes-support/libgcrypt/files/0003-GCM-move-look-up-table-to-.data-section-and-unshare-.patch b/meta/recipes-support/libgcrypt/files/0003-GCM-move-look-up-table-to-.data-section-and-unshare-.patch new file mode 100644 index 0000000000..b580b7b13c --- /dev/null +++ b/meta/recipes-support/libgcrypt/files/0003-GCM-move-look-up-table-to-.data-section-and-unshare-.patch @@ -0,0 +1,178 @@ +From a4c561aab1014c3630bc88faf6f5246fee16b020 Mon Sep 17 00:00:00 2001 +From: Jussi Kivilinna +Date: Fri, 31 May 2019 17:27:25 +0300 +Subject: [PATCH 3/3] GCM: move look-up table to .data section and unshare + between processes + +* cipher/cipher-gcm.c (ATTR_ALIGNED_64): New. +(gcmR): Move to 'gcm_table' structure. +(gcm_table): New structure for look-up table with counters before and +after. +(gcmR): New macro. +(prefetch_table): Handle input with length not multiple of 256. +(do_prefetch_tables): Modify pre- and post-table counters to unshare +look-up table pages between processes. +-- + +GnuPG-bug-id: 4541 +Signed-off-by: Jussi Kivilinna + +Upstream-Status: Backport +[https://github.com/gpg/libgcrypt/commit/a4c561aab1014c3630bc88faf6f5246fee16b020] + +CVE: CVE-2019-12904 + +Signed-off-by: Yi Zhao +--- + cipher/cipher-gcm.c | 106 ++++++++++++++++++++++++++++++++++------------------ + 1 file changed, 70 insertions(+), 36 deletions(-) + +diff --git a/cipher/cipher-gcm.c b/cipher/cipher-gcm.c +index 11f119a..194e2ec 100644 +--- a/cipher/cipher-gcm.c ++++ b/cipher/cipher-gcm.c +@@ -30,6 +30,14 @@ + #include "./cipher-internal.h" + + ++/* Helper macro to force alignment to 16 or 64 bytes. */ ++#ifdef HAVE_GCC_ATTRIBUTE_ALIGNED ++# define ATTR_ALIGNED_64 __attribute__ ((aligned (64))) ++#else ++# define ATTR_ALIGNED_64 ++#endif ++ ++ + #ifdef GCM_USE_INTEL_PCLMUL + extern void _gcry_ghash_setup_intel_pclmul (gcry_cipher_hd_t c); + +@@ -83,40 +91,54 @@ ghash_armv7_neon (gcry_cipher_hd_t c, byte *result, const byte *buf, + + + #ifdef GCM_USE_TABLES +-static const u16 gcmR[256] = { +- 0x0000, 0x01c2, 0x0384, 0x0246, 0x0708, 0x06ca, 0x048c, 0x054e, +- 0x0e10, 0x0fd2, 0x0d94, 0x0c56, 0x0918, 0x08da, 0x0a9c, 0x0b5e, +- 0x1c20, 0x1de2, 0x1fa4, 0x1e66, 0x1b28, 0x1aea, 0x18ac, 0x196e, +- 0x1230, 0x13f2, 0x11b4, 0x1076, 0x1538, 0x14fa, 0x16bc, 0x177e, +- 0x3840, 0x3982, 0x3bc4, 0x3a06, 0x3f48, 0x3e8a, 0x3ccc, 0x3d0e, +- 0x3650, 0x3792, 0x35d4, 0x3416, 0x3158, 0x309a, 0x32dc, 0x331e, +- 0x2460, 0x25a2, 0x27e4, 0x2626, 0x2368, 0x22aa, 0x20ec, 0x212e, +- 0x2a70, 0x2bb2, 0x29f4, 0x2836, 0x2d78, 0x2cba, 0x2efc, 0x2f3e, +- 0x7080, 0x7142, 0x7304, 0x72c6, 0x7788, 0x764a, 0x740c, 0x75ce, +- 0x7e90, 0x7f52, 0x7d14, 0x7cd6, 0x7998, 0x785a, 0x7a1c, 0x7bde, +- 0x6ca0, 0x6d62, 0x6f24, 0x6ee6, 0x6ba8, 0x6a6a, 0x682c, 0x69ee, +- 0x62b0, 0x6372, 0x6134, 0x60f6, 0x65b8, 0x647a, 0x663c, 0x67fe, +- 0x48c0, 0x4902, 0x4b44, 0x4a86, 0x4fc8, 0x4e0a, 0x4c4c, 0x4d8e, +- 0x46d0, 0x4712, 0x4554, 0x4496, 0x41d8, 0x401a, 0x425c, 0x439e, +- 0x54e0, 0x5522, 0x5764, 0x56a6, 0x53e8, 0x522a, 0x506c, 0x51ae, +- 0x5af0, 0x5b32, 0x5974, 0x58b6, 0x5df8, 0x5c3a, 0x5e7c, 0x5fbe, +- 0xe100, 0xe0c2, 0xe284, 0xe346, 0xe608, 0xe7ca, 0xe58c, 0xe44e, +- 0xef10, 0xeed2, 0xec94, 0xed56, 0xe818, 0xe9da, 0xeb9c, 0xea5e, +- 0xfd20, 0xfce2, 0xfea4, 0xff66, 0xfa28, 0xfbea, 0xf9ac, 0xf86e, +- 0xf330, 0xf2f2, 0xf0b4, 0xf176, 0xf438, 0xf5fa, 0xf7bc, 0xf67e, +- 0xd940, 0xd882, 0xdac4, 0xdb06, 0xde48, 0xdf8a, 0xddcc, 0xdc0e, +- 0xd750, 0xd692, 0xd4d4, 0xd516, 0xd058, 0xd19a, 0xd3dc, 0xd21e, +- 0xc560, 0xc4a2, 0xc6e4, 0xc726, 0xc268, 0xc3aa, 0xc1ec, 0xc02e, +- 0xcb70, 0xcab2, 0xc8f4, 0xc936, 0xcc78, 0xcdba, 0xcffc, 0xce3e, +- 0x9180, 0x9042, 0x9204, 0x93c6, 0x9688, 0x974a, 0x950c, 0x94ce, +- 0x9f90, 0x9e52, 0x9c14, 0x9dd6, 0x9898, 0x995a, 0x9b1c, 0x9ade, +- 0x8da0, 0x8c62, 0x8e24, 0x8fe6, 0x8aa8, 0x8b6a, 0x892c, 0x88ee, +- 0x83b0, 0x8272, 0x8034, 0x81f6, 0x84b8, 0x857a, 0x873c, 0x86fe, +- 0xa9c0, 0xa802, 0xaa44, 0xab86, 0xaec8, 0xaf0a, 0xad4c, 0xac8e, +- 0xa7d0, 0xa612, 0xa454, 0xa596, 0xa0d8, 0xa11a, 0xa35c, 0xa29e, +- 0xb5e0, 0xb422, 0xb664, 0xb7a6, 0xb2e8, 0xb32a, 0xb16c, 0xb0ae, +- 0xbbf0, 0xba32, 0xb874, 0xb9b6, 0xbcf8, 0xbd3a, 0xbf7c, 0xbebe, +-}; ++static struct ++{ ++ volatile u32 counter_head; ++ u32 cacheline_align[64 / 4 - 1]; ++ u16 R[256]; ++ volatile u32 counter_tail; ++} gcm_table ATTR_ALIGNED_64 = ++ { ++ 0, ++ { 0, }, ++ { ++ 0x0000, 0x01c2, 0x0384, 0x0246, 0x0708, 0x06ca, 0x048c, 0x054e, ++ 0x0e10, 0x0fd2, 0x0d94, 0x0c56, 0x0918, 0x08da, 0x0a9c, 0x0b5e, ++ 0x1c20, 0x1de2, 0x1fa4, 0x1e66, 0x1b28, 0x1aea, 0x18ac, 0x196e, ++ 0x1230, 0x13f2, 0x11b4, 0x1076, 0x1538, 0x14fa, 0x16bc, 0x177e, ++ 0x3840, 0x3982, 0x3bc4, 0x3a06, 0x3f48, 0x3e8a, 0x3ccc, 0x3d0e, ++ 0x3650, 0x3792, 0x35d4, 0x3416, 0x3158, 0x309a, 0x32dc, 0x331e, ++ 0x2460, 0x25a2, 0x27e4, 0x2626, 0x2368, 0x22aa, 0x20ec, 0x212e, ++ 0x2a70, 0x2bb2, 0x29f4, 0x2836, 0x2d78, 0x2cba, 0x2efc, 0x2f3e, ++ 0x7080, 0x7142, 0x7304, 0x72c6, 0x7788, 0x764a, 0x740c, 0x75ce, ++ 0x7e90, 0x7f52, 0x7d14, 0x7cd6, 0x7998, 0x785a, 0x7a1c, 0x7bde, ++ 0x6ca0, 0x6d62, 0x6f24, 0x6ee6, 0x6ba8, 0x6a6a, 0x682c, 0x69ee, ++ 0x62b0, 0x6372, 0x6134, 0x60f6, 0x65b8, 0x647a, 0x663c, 0x67fe, ++ 0x48c0, 0x4902, 0x4b44, 0x4a86, 0x4fc8, 0x4e0a, 0x4c4c, 0x4d8e, ++ 0x46d0, 0x4712, 0x4554, 0x4496, 0x41d8, 0x401a, 0x425c, 0x439e, ++ 0x54e0, 0x5522, 0x5764, 0x56a6, 0x53e8, 0x522a, 0x506c, 0x51ae, ++ 0x5af0, 0x5b32, 0x5974, 0x58b6, 0x5df8, 0x5c3a, 0x5e7c, 0x5fbe, ++ 0xe100, 0xe0c2, 0xe284, 0xe346, 0xe608, 0xe7ca, 0xe58c, 0xe44e, ++ 0xef10, 0xeed2, 0xec94, 0xed56, 0xe818, 0xe9da, 0xeb9c, 0xea5e, ++ 0xfd20, 0xfce2, 0xfea4, 0xff66, 0xfa28, 0xfbea, 0xf9ac, 0xf86e, ++ 0xf330, 0xf2f2, 0xf0b4, 0xf176, 0xf438, 0xf5fa, 0xf7bc, 0xf67e, ++ 0xd940, 0xd882, 0xdac4, 0xdb06, 0xde48, 0xdf8a, 0xddcc, 0xdc0e, ++ 0xd750, 0xd692, 0xd4d4, 0xd516, 0xd058, 0xd19a, 0xd3dc, 0xd21e, ++ 0xc560, 0xc4a2, 0xc6e4, 0xc726, 0xc268, 0xc3aa, 0xc1ec, 0xc02e, ++ 0xcb70, 0xcab2, 0xc8f4, 0xc936, 0xcc78, 0xcdba, 0xcffc, 0xce3e, ++ 0x9180, 0x9042, 0x9204, 0x93c6, 0x9688, 0x974a, 0x950c, 0x94ce, ++ 0x9f90, 0x9e52, 0x9c14, 0x9dd6, 0x9898, 0x995a, 0x9b1c, 0x9ade, ++ 0x8da0, 0x8c62, 0x8e24, 0x8fe6, 0x8aa8, 0x8b6a, 0x892c, 0x88ee, ++ 0x83b0, 0x8272, 0x8034, 0x81f6, 0x84b8, 0x857a, 0x873c, 0x86fe, ++ 0xa9c0, 0xa802, 0xaa44, 0xab86, 0xaec8, 0xaf0a, 0xad4c, 0xac8e, ++ 0xa7d0, 0xa612, 0xa454, 0xa596, 0xa0d8, 0xa11a, 0xa35c, 0xa29e, ++ 0xb5e0, 0xb422, 0xb664, 0xb7a6, 0xb2e8, 0xb32a, 0xb16c, 0xb0ae, ++ 0xbbf0, 0xba32, 0xb874, 0xb9b6, 0xbcf8, 0xbd3a, 0xbf7c, 0xbebe, ++ }, ++ 0 ++ }; ++ ++#define gcmR gcm_table.R + + static inline + void prefetch_table(const void *tab, size_t len) +@@ -124,7 +146,7 @@ void prefetch_table(const void *tab, size_t len) + const volatile byte *vtab = tab; + size_t i; + +- for (i = 0; i < len; i += 8 * 32) ++ for (i = 0; len - i >= 8 * 32; i += 8 * 32) + { + (void)vtab[i + 0 * 32]; + (void)vtab[i + 1 * 32]; +@@ -135,6 +157,10 @@ void prefetch_table(const void *tab, size_t len) + (void)vtab[i + 6 * 32]; + (void)vtab[i + 7 * 32]; + } ++ for (; i < len; i += 32) ++ { ++ (void)vtab[i]; ++ } + + (void)vtab[len - 1]; + } +@@ -142,8 +168,16 @@ void prefetch_table(const void *tab, size_t len) + static inline void + do_prefetch_tables (const void *gcmM, size_t gcmM_size) + { ++ /* Modify counters to trigger copy-on-write and unsharing if physical pages ++ * of look-up table are shared between processes. Modifying counters also ++ * causes checksums for pages to change and hint same-page merging algorithm ++ * that these pages are frequently changing. */ ++ gcm_table.counter_head++; ++ gcm_table.counter_tail++; ++ ++ /* Prefetch look-up tables to cache. */ + prefetch_table(gcmM, gcmM_size); +- prefetch_table(gcmR, sizeof(gcmR)); ++ prefetch_table(&gcm_table, sizeof(gcm_table)); + } + + #ifdef GCM_TABLES_USE_U64 +-- +2.7.4 + diff --git a/meta/recipes-support/libgcrypt/libgcrypt_1.8.4.bb b/meta/recipes-support/libgcrypt/libgcrypt_1.8.4.bb index fda68a2938..11d078d44a 100644 --- a/meta/recipes-support/libgcrypt/libgcrypt_1.8.4.bb +++ b/meta/recipes-support/libgcrypt/libgcrypt_1.8.4.bb @@ -21,6 +21,9 @@ SRC_URI = "${GNUPG_MIRROR}/libgcrypt/libgcrypt-${PV}.tar.bz2 \ file://0003-tests-bench-slope.c-workaround-ICE-failure-on-mips-w.patch \ file://0002-libgcrypt-fix-building-error-with-O2-in-sysroot-path.patch \ file://0004-tests-Makefile.am-fix-undefined-reference-to-pthread.patch \ + file://0001-Prefetch-GCM-look-up-tables.patch \ + file://0002-AES-move-look-up-tables-to-.data-section-and-unshare.patch \ + file://0003-GCM-move-look-up-table-to-.data-section-and-unshare-.patch \ " SRC_URI[md5sum] = "fbfdaebbbc6d7e5fbbf6ffdb3e139573" SRC_URI[sha256sum] = "f638143a0672628fde0cad745e9b14deb85dffb175709cacc1f4fe24b93f2227" -- cgit 1.2.3-korg