From aeb709c767aeca996e6011133e4f7bdb2a4af652 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Wed, 30 Sep 2026 09:59:20 +0000 Subject: selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first free_bulk() starts RCU tasks trace GP and the rest of the elements are freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and waiting_for_gp_ttrace lists are empty. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- lib/crypto/chacha.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 lib/crypto/chacha.c (limited to 'lib/crypto/chacha.c') diff --git a/lib/crypto/chacha.c b/lib/crypto/chacha.c new file mode 100644 index 000000000..86e5d382a --- /dev/null +++ b/lib/crypto/chacha.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * The ChaCha stream cipher (RFC7539) + * + * Copyright (C) 2015 Martin Willi + */ + +#include +#include +#include +#include +#include + +static void __maybe_unused +chacha_crypt_generic(struct chacha_state *state, u8 *dst, const u8 *src, + unsigned int bytes, int nrounds) +{ + /* aligned to potentially speed up crypto_xor() */ + u8 stream[CHACHA_BLOCK_SIZE] __aligned(sizeof(long)); + + while (bytes >= CHACHA_BLOCK_SIZE) { + chacha_block_generic(state, stream, nrounds); + crypto_xor_cpy(dst, src, stream, CHACHA_BLOCK_SIZE); + bytes -= CHACHA_BLOCK_SIZE; + dst += CHACHA_BLOCK_SIZE; + src += CHACHA_BLOCK_SIZE; + } + if (bytes) { + chacha_block_generic(state, stream, nrounds); + crypto_xor_cpy(dst, src, stream, bytes); + } +} + +#ifdef CONFIG_CRYPTO_LIB_CHACHA_ARCH +#include "chacha.h" /* $(SRCARCH)/chacha.h */ +#else +#define chacha_crypt_arch chacha_crypt_generic +#define hchacha_block_arch hchacha_block_generic +#endif + +void chacha_crypt(struct chacha_state *state, u8 *dst, const u8 *src, + unsigned int bytes, int nrounds) +{ + chacha_crypt_arch(state, dst, src, bytes, nrounds); +} +EXPORT_SYMBOL_GPL(chacha_crypt); + +void hchacha_block(const struct chacha_state *state, + u32 out[HCHACHA_OUT_WORDS], int nrounds) +{ + hchacha_block_arch(state, out, nrounds); +} +EXPORT_SYMBOL_GPL(hchacha_block); + +#ifdef chacha_mod_init_arch +static int __init chacha_mod_init(void) +{ + chacha_mod_init_arch(); + return 0; +} +subsys_initcall(chacha_mod_init); + +static void __exit chacha_mod_exit(void) +{ +} +module_exit(chacha_mod_exit); +#endif + +MODULE_DESCRIPTION("ChaCha stream cipher (RFC7539)"); +MODULE_LICENSE("GPL"); -- cgit v1.3.1