From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- lib/crypto/sm3.c | 290 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 290 insertions(+) create mode 100644 lib/crypto/sm3.c (limited to 'lib/crypto/sm3.c') diff --git a/lib/crypto/sm3.c b/lib/crypto/sm3.c new file mode 100644 index 000000000..b02b8a247 --- /dev/null +++ b/lib/crypto/sm3.c @@ -0,0 +1,290 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and described + * at https://datatracker.ietf.org/doc/html/draft-sca-cfrg-sm3-02 + * + * Copyright (C) 2017 ARM Limited or its affiliates. + * Copyright (C) 2017 Gilad Ben-Yossef + * Copyright (C) 2021 Tianjia Zhang + */ + +#include +#include +#include +#include +#include +#include + +static const struct sm3_block_state sm3_iv = { + .h = { + SM3_IVA, SM3_IVB, SM3_IVC, SM3_IVD, + SM3_IVE, SM3_IVF, SM3_IVG, SM3_IVH, + }, +}; + +static const u32 ____cacheline_aligned K[64] = { + 0x79cc4519, 0xf3988a32, 0xe7311465, 0xce6228cb, + 0x9cc45197, 0x3988a32f, 0x7311465e, 0xe6228cbc, + 0xcc451979, 0x988a32f3, 0x311465e7, 0x6228cbce, + 0xc451979c, 0x88a32f39, 0x11465e73, 0x228cbce6, + 0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c, + 0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce, + 0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec, + 0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5, + 0x7a879d8a, 0xf50f3b14, 0xea1e7629, 0xd43cec53, + 0xa879d8a7, 0x50f3b14f, 0xa1e7629e, 0x43cec53d, + 0x879d8a7a, 0x0f3b14f5, 0x1e7629ea, 0x3cec53d4, + 0x79d8a7a8, 0xf3b14f50, 0xe7629ea1, 0xcec53d43, + 0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c, + 0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce, + 0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec, + 0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5 +}; + +/* + * Transform the message X which consists of 16 32-bit-words. See + * GM/T 004-2012 for details. + */ +#define R(i, a, b, c, d, e, f, g, h, t, w1, w2) \ + do { \ + ss1 = rol32((rol32((a), 12) + (e) + (t)), 7); \ + ss2 = ss1 ^ rol32((a), 12); \ + d += FF ## i(a, b, c) + ss2 + ((w1) ^ (w2)); \ + h += GG ## i(e, f, g) + ss1 + (w1); \ + b = rol32((b), 9); \ + f = rol32((f), 19); \ + h = P0((h)); \ + } while (0) + +#define R1(a, b, c, d, e, f, g, h, t, w1, w2) \ + R(1, a, b, c, d, e, f, g, h, t, w1, w2) +#define R2(a, b, c, d, e, f, g, h, t, w1, w2) \ + R(2, a, b, c, d, e, f, g, h, t, w1, w2) + +#define FF1(x, y, z) (x ^ y ^ z) +#define FF2(x, y, z) ((x & y) | (x & z) | (y & z)) + +#define GG1(x, y, z) FF1(x, y, z) +#define GG2(x, y, z) ((x & y) | (~x & z)) + +/* Message expansion */ +#define P0(x) ((x) ^ rol32((x), 9) ^ rol32((x), 17)) +#define P1(x) ((x) ^ rol32((x), 15) ^ rol32((x), 23)) +#define I(i) (W[i] = get_unaligned_be32(data + i * 4)) +#define W1(i) (W[i & 0x0f]) +#define W2(i) (W[i & 0x0f] = \ + P1(W[i & 0x0f] \ + ^ W[(i-9) & 0x0f] \ + ^ rol32(W[(i-3) & 0x0f], 15)) \ + ^ rol32(W[(i-13) & 0x0f], 7) \ + ^ W[(i-6) & 0x0f]) + +static void sm3_block_generic(struct sm3_block_state *state, + const u8 data[SM3_BLOCK_SIZE], u32 W[16]) +{ + u32 a, b, c, d, e, f, g, h, ss1, ss2; + + a = state->h[0]; + b = state->h[1]; + c = state->h[2]; + d = state->h[3]; + e = state->h[4]; + f = state->h[5]; + g = state->h[6]; + h = state->h[7]; + + R1(a, b, c, d, e, f, g, h, K[0], I(0), I(4)); + R1(d, a, b, c, h, e, f, g, K[1], I(1), I(5)); + R1(c, d, a, b, g, h, e, f, K[2], I(2), I(6)); + R1(b, c, d, a, f, g, h, e, K[3], I(3), I(7)); + R1(a, b, c, d, e, f, g, h, K[4], W1(4), I(8)); + R1(d, a, b, c, h, e, f, g, K[5], W1(5), I(9)); + R1(c, d, a, b, g, h, e, f, K[6], W1(6), I(10)); + R1(b, c, d, a, f, g, h, e, K[7], W1(7), I(11)); + R1(a, b, c, d, e, f, g, h, K[8], W1(8), I(12)); + R1(d, a, b, c, h, e, f, g, K[9], W1(9), I(13)); + R1(c, d, a, b, g, h, e, f, K[10], W1(10), I(14)); + R1(b, c, d, a, f, g, h, e, K[11], W1(11), I(15)); + R1(a, b, c, d, e, f, g, h, K[12], W1(12), W2(16)); + R1(d, a, b, c, h, e, f, g, K[13], W1(13), W2(17)); + R1(c, d, a, b, g, h, e, f, K[14], W1(14), W2(18)); + R1(b, c, d, a, f, g, h, e, K[15], W1(15), W2(19)); + + R2(a, b, c, d, e, f, g, h, K[16], W1(16), W2(20)); + R2(d, a, b, c, h, e, f, g, K[17], W1(17), W2(21)); + R2(c, d, a, b, g, h, e, f, K[18], W1(18), W2(22)); + R2(b, c, d, a, f, g, h, e, K[19], W1(19), W2(23)); + R2(a, b, c, d, e, f, g, h, K[20], W1(20), W2(24)); + R2(d, a, b, c, h, e, f, g, K[21], W1(21), W2(25)); + R2(c, d, a, b, g, h, e, f, K[22], W1(22), W2(26)); + R2(b, c, d, a, f, g, h, e, K[23], W1(23), W2(27)); + R2(a, b, c, d, e, f, g, h, K[24], W1(24), W2(28)); + R2(d, a, b, c, h, e, f, g, K[25], W1(25), W2(29)); + R2(c, d, a, b, g, h, e, f, K[26], W1(26), W2(30)); + R2(b, c, d, a, f, g, h, e, K[27], W1(27), W2(31)); + R2(a, b, c, d, e, f, g, h, K[28], W1(28), W2(32)); + R2(d, a, b, c, h, e, f, g, K[29], W1(29), W2(33)); + R2(c, d, a, b, g, h, e, f, K[30], W1(30), W2(34)); + R2(b, c, d, a, f, g, h, e, K[31], W1(31), W2(35)); + + R2(a, b, c, d, e, f, g, h, K[32], W1(32), W2(36)); + R2(d, a, b, c, h, e, f, g, K[33], W1(33), W2(37)); + R2(c, d, a, b, g, h, e, f, K[34], W1(34), W2(38)); + R2(b, c, d, a, f, g, h, e, K[35], W1(35), W2(39)); + R2(a, b, c, d, e, f, g, h, K[36], W1(36), W2(40)); + R2(d, a, b, c, h, e, f, g, K[37], W1(37), W2(41)); + R2(c, d, a, b, g, h, e, f, K[38], W1(38), W2(42)); + R2(b, c, d, a, f, g, h, e, K[39], W1(39), W2(43)); + R2(a, b, c, d, e, f, g, h, K[40], W1(40), W2(44)); + R2(d, a, b, c, h, e, f, g, K[41], W1(41), W2(45)); + R2(c, d, a, b, g, h, e, f, K[42], W1(42), W2(46)); + R2(b, c, d, a, f, g, h, e, K[43], W1(43), W2(47)); + R2(a, b, c, d, e, f, g, h, K[44], W1(44), W2(48)); + R2(d, a, b, c, h, e, f, g, K[45], W1(45), W2(49)); + R2(c, d, a, b, g, h, e, f, K[46], W1(46), W2(50)); + R2(b, c, d, a, f, g, h, e, K[47], W1(47), W2(51)); + + R2(a, b, c, d, e, f, g, h, K[48], W1(48), W2(52)); + R2(d, a, b, c, h, e, f, g, K[49], W1(49), W2(53)); + R2(c, d, a, b, g, h, e, f, K[50], W1(50), W2(54)); + R2(b, c, d, a, f, g, h, e, K[51], W1(51), W2(55)); + R2(a, b, c, d, e, f, g, h, K[52], W1(52), W2(56)); + R2(d, a, b, c, h, e, f, g, K[53], W1(53), W2(57)); + R2(c, d, a, b, g, h, e, f, K[54], W1(54), W2(58)); + R2(b, c, d, a, f, g, h, e, K[55], W1(55), W2(59)); + R2(a, b, c, d, e, f, g, h, K[56], W1(56), W2(60)); + R2(d, a, b, c, h, e, f, g, K[57], W1(57), W2(61)); + R2(c, d, a, b, g, h, e, f, K[58], W1(58), W2(62)); + R2(b, c, d, a, f, g, h, e, K[59], W1(59), W2(63)); + R2(a, b, c, d, e, f, g, h, K[60], W1(60), W2(64)); + R2(d, a, b, c, h, e, f, g, K[61], W1(61), W2(65)); + R2(c, d, a, b, g, h, e, f, K[62], W1(62), W2(66)); + R2(b, c, d, a, f, g, h, e, K[63], W1(63), W2(67)); + + state->h[0] ^= a; + state->h[1] ^= b; + state->h[2] ^= c; + state->h[3] ^= d; + state->h[4] ^= e; + state->h[5] ^= f; + state->h[6] ^= g; + state->h[7] ^= h; +} +#undef R +#undef R1 +#undef R2 +#undef I +#undef W1 +#undef W2 + +static void __maybe_unused sm3_blocks_generic(struct sm3_block_state *state, + const u8 *data, size_t nblocks) +{ + u32 W[16]; + + do { + sm3_block_generic(state, data, W); + data += SM3_BLOCK_SIZE; + } while (--nblocks); + + memzero_explicit(W, sizeof(W)); +} + +#ifdef CONFIG_CRYPTO_LIB_SM3_ARCH +#include "sm3.h" /* $(SRCARCH)/sm3.h */ +#else +#define sm3_blocks sm3_blocks_generic +#endif + +void sm3_init(struct sm3_ctx *ctx) +{ + ctx->state = sm3_iv; + ctx->bytecount = 0; +} +EXPORT_SYMBOL_GPL(sm3_init); + +void sm3_update(struct sm3_ctx *ctx, const u8 *data, size_t len) +{ + size_t partial = ctx->bytecount % SM3_BLOCK_SIZE; + + ctx->bytecount += len; + + if (partial + len >= SM3_BLOCK_SIZE) { + size_t nblocks; + + if (partial) { + size_t l = SM3_BLOCK_SIZE - partial; + + memcpy(&ctx->buf[partial], data, l); + data += l; + len -= l; + + sm3_blocks(&ctx->state, ctx->buf, 1); + } + + nblocks = len / SM3_BLOCK_SIZE; + len %= SM3_BLOCK_SIZE; + + if (nblocks) { + sm3_blocks(&ctx->state, data, nblocks); + data += nblocks * SM3_BLOCK_SIZE; + } + partial = 0; + } + if (len) + memcpy(&ctx->buf[partial], data, len); +} +EXPORT_SYMBOL_GPL(sm3_update); + +static void __sm3_final(struct sm3_ctx *ctx, u8 out[SM3_DIGEST_SIZE]) +{ + u64 bitcount = ctx->bytecount << 3; + size_t partial = ctx->bytecount % SM3_BLOCK_SIZE; + + ctx->buf[partial++] = 0x80; + if (partial > SM3_BLOCK_SIZE - 8) { + memset(&ctx->buf[partial], 0, SM3_BLOCK_SIZE - partial); + sm3_blocks(&ctx->state, ctx->buf, 1); + partial = 0; + } + memset(&ctx->buf[partial], 0, SM3_BLOCK_SIZE - 8 - partial); + *(__be64 *)&ctx->buf[SM3_BLOCK_SIZE - 8] = cpu_to_be64(bitcount); + sm3_blocks(&ctx->state, ctx->buf, 1); + + for (size_t i = 0; i < SM3_DIGEST_SIZE; i += 4) + put_unaligned_be32(ctx->state.h[i / 4], out + i); +} + +void sm3_final(struct sm3_ctx *ctx, u8 out[SM3_DIGEST_SIZE]) +{ + __sm3_final(ctx, out); + memzero_explicit(ctx, sizeof(*ctx)); +} +EXPORT_SYMBOL_GPL(sm3_final); + +void sm3(const u8 *data, size_t len, u8 out[SM3_DIGEST_SIZE]) +{ + struct sm3_ctx ctx; + + sm3_init(&ctx); + sm3_update(&ctx, data, len); + sm3_final(&ctx, out); +} +EXPORT_SYMBOL_GPL(sm3); + +#ifdef sm3_mod_init_arch +static int __init sm3_mod_init(void) +{ + sm3_mod_init_arch(); + return 0; +} +subsys_initcall(sm3_mod_init); + +static void __exit sm3_mod_exit(void) +{ +} +module_exit(sm3_mod_exit); +#endif + +MODULE_DESCRIPTION("SM3 library functions"); +MODULE_LICENSE("GPL v2"); -- cgit v1.3.1