From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- crypto/jitterentropy.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 crypto/jitterentropy.h (limited to 'crypto/jitterentropy.h') diff --git a/crypto/jitterentropy.h b/crypto/jitterentropy.h new file mode 100644 index 000000000..5bb15cb33 --- /dev/null +++ b/crypto/jitterentropy.h @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +struct sha3_ctx; +extern void *jent_kvzalloc(unsigned int len); +extern void jent_kvzfree(void *ptr, unsigned int len); +extern void *jent_zalloc(unsigned int len); +extern void jent_zfree(void *ptr); +extern void jent_get_nstime(__u64 *out); +void jent_hash_time(struct sha3_ctx *hash_state, __u64 time, u8 *addtl, + unsigned int addtl_len, __u64 hash_loop_cnt, + unsigned int stuck); +void jent_read_random_block(struct sha3_ctx *hash_state, char *dst, + unsigned int dst_len); + +struct rand_data; +extern int jent_entropy_init(unsigned int osr, unsigned int flags, + struct sha3_ctx *hash_state, + struct rand_data *p_ec); +extern int jent_read_entropy(struct rand_data *ec, unsigned char *data, + unsigned int len); + +extern struct rand_data * +jent_entropy_collector_alloc(unsigned int osr, unsigned int flags, + struct sha3_ctx *hash_state); +extern void jent_entropy_collector_free(struct rand_data *entropy_collector); + +#ifdef CONFIG_CRYPTO_JITTERENTROPY_TESTINTERFACE +int jent_raw_hires_entropy_store(__u64 value); +void jent_testing_init(void); +void jent_testing_exit(void); +#else /* CONFIG_CRYPTO_JITTERENTROPY_TESTINTERFACE */ +static inline int jent_raw_hires_entropy_store(__u64 value) { return 0; } +static inline void jent_testing_init(void) { } +static inline void jent_testing_exit(void) { } +#endif /* CONFIG_CRYPTO_JITTERENTROPY_TESTINTERFACE */ -- cgit v1.3.1