linuxkm/linuxkm_wc_port.h: fixes for legacy kernels, particularly: when building TLS stack (!WOLFCRYPT_ONLY), use the best heap with a functioning realloc(), else use kvmalloc() and friends if available, even if kvrealloc() is unavailable. also, provide for XMALLOC_USER and XMALLOC_OVERRIDE;
linuxkm/lkcapi_glue.c: recognize the new CONFIG_CRYPTO_SELFTESTS_FULL alongside the old CONFIG_CRYPTO_MANAGER_EXTRA_TESTS;
linuxkm/linuxkm_memory.c: restore my__show_free_areas() in case it's still needed.
linuxkm/linuxkm_wc_port.h: only use kvrealloc() on kernel >=6.11 -- the version in 5.15-6.10 is incompatible (oldsize arg). also, restore use of kvmalloc on 4.12+, but with XREALLOC undefined, suitable for cryptonly modules; add #include <linux/sched.h> even on __PIE__ objects to make cond_sched() available;
wolfcrypt/src/asn.c: harmonize gate around definitions of BEGIN_DSA_PRIV and END_DSA_PRIV;
wolfcrypt/src/asn.c: in EccSpecifiedECDomainDecode(), work around "const char[]" types in WOLFSSL_ECC_CURVE_STATIC struct ecc_set_type on FIPS <6;
wolfcrypt/src/asn.c, wolfcrypt/src/wc_xmss.c, wolfssl/wolfcrypt/wc_lms.h: add comments to new WOLFSSL_NAMES_STATIC slots explaining where the size comes from.
linuxkm/Kbuild: add linker script flag, containerize several more previously-missed ELF sections, and add a test verifying no sections were missed;
linuxkm/linuxkm_memory.c: remove obsolete lkm_realloc() shim and unneeded my__show_free_areas() wrapper;
linuxkm/linuxkm_wc_port.h: add new mapping from realloc() to native kvrealloc(), and gate out a slew of headers when __PIE__ to avoid polluting wolfCrypt objects with various unneeded header-implemented functions with associated awkward symbols references;
linuxkm/lkcapi_glue.c: harmonize gate for REGISTER_ALG_OPTIONAL();
linuxkm/module_hooks.c: add "ERROR:" prefixes on pr_err()s; add wc_RunAllCast_fips() at shutdown to send confidence verification to the kernel log; remove section bounds checks now that layout is unreliable;
wolfssl/wolfcrypt/settings.h: for WOLFSSL_LINUXKM && HAVE_LINUXKM_PIE_SUPPORT, #define WOLFSSL_ECC_CURVE_STATIC and WOLFSSL_NAMES_STATIC;
wolfssl/wolfcrypt/types.h: refactor the typedef for wcchar from a pointer to a char[];
wolfcrypt/src/wc_xmss.c and wolfssl/wolfcrypt/wc_lms.h: add WOLFSSL_NAMES_STATIC code paths for struct wc_XmssString and struct wc_LmsParamsMap;
wolfcrypt/src/asn.c: add WOLFSSL_NAMES_STATIC code paths for struct CertNameData, and add static attribute to a slew of wcchars not used or declared outside asn.c.
* add wc_linuxkm_drbg_ctx.n_rngs, and in wc_linuxkm_drbg_init_tfm(), set it to max(4, nr_cpu_ids), to avoid stalling on unicore targets;
* add explanatory comments re architecture to get_drbg() and get_drbg_n();
* add opportunistic cond_sched() to get_drbg_n();
* add runtime asserts in get_drbg(), wc_linuxkm_drbg_seed(), and get_default_drbg_ctx(), checking that we have the right tfm with an allocated DRBG array;
* wc_linuxkm_drbg_startup(): return failure if registering the random_bytes handlers fails;
linuxkm/patches/6.1.73/WOLFSSL_LINUXKM_HAVE_GET_RANDOM_CALLBACKS-6v1v73.patch: fix flub.
linuxkm/lkcapi_sha_glue.c:
* in wc_linuxkm_drbg_init_tfm(), sleep if it's safe, and observe a wc_linuxkm_drbg_init_tfm_disable_vector_registers flag;
* in wc_crng_reseed(), preemptively execute the reseed if it's safe to sleep;
* in wc_linuxkm_drbg_startup(), in LINUXKM_DRBG_GET_RANDOM_BYTES section, add reseed test sequence if defined(DEBUG_DRBG_RESEEDS).
wolfssl/wolfcrypt/settings.h: if WOLFSSL_LINUXKM && LINUXKM_LKCAPI_REGISTER && WORD64_AVAILABLE, set default WC_RESEED_INTERVAL to max allowed (2^48);
linuxkm/lkcapi_sha_glue.c: handle NO_LINUXKM_DRBG_GET_RANDOM_BYTES, for build-time override control of LINUXKM_DRBG_GET_RANDOM_BYTES, and handle WOLFSSL_LINUXKM_USE_GET_RANDOM_USER_KRETPROBE, for separate opt-in control of the buggy wc_get_random_bytes_user_kretprobe_enter().
* implement interception of _get_random_bytes() and get_random_bytes_user() (implicitly intercepts /dev/random and /dev/urandom):
* get_crypto_default_rng()
* get_default_drbg_ctx()
* wc__get_random_bytes()
* wc_get_random_bytes_user()
* wc_extract_crng_user()
* wc_mix_pool_bytes()
* wc_crng_reseed()
* wc_get_random_bytes_by_kprobe()
* wc_get_random_bytes_user_kretprobe_enter()
* wc_get_random_bytes_user_kretprobe_exit()
* add LINUXKM_DRBG_GET_RANDOM_BYTES sections to wc_linuxkm_drbg_startup() and wc_linuxkm_drbg_cleanup()
* add linuxkm/patches/*/WOLFSSL_LINUXKM_HAVE_GET_RANDOM_CALLBACKS-*.patch, initially for versions:
* 5.10.17
* 5.10.236
* 5.15
* 5.17
* 6.1.73
* 6.12
* 6.15
* remove "*.patch" from .gitignore.
* add linuxkm/patches/regen-patches.sh.
* in wc_linuxkm_drbg_ctx_clear(), check lock count before freeing.
* in get_drbg() and put_drbg(), use migrate_disable(), not DISABLE_VECTOR_REGISTERS().
* in wc_linuxkm_drbg_generate(), explicitly DISABLE_VECTOR_REGISTERS() for the crypto_default_rng.
* in wc_linuxkm_drbg_generate(), add DRBG reinitialization code to handle RNG_FAILURE_E. This handles the situation where a DRBG was instantiated in a vector-ops-allowed context, caching a vectorized SHA256 ethod, but later used in a no-vector-ops-allowed context.
* in wc_linuxkm_drbg_seed(), add DISABLE_VECTOR_REGISTERS() wrapper around wc_RNG_DRBG_Reseed() for crypto_default_rng.
linuxkm/x86_vector_register_glue.c:
* add crash recovery logic to wc_linuxkm_fpu_state_assoc_unlikely()
* in wc_linuxkm_fpu_state_assoc(), when wc_linuxkm_fpu_states is null, don't call wc_linuxkm_fpu_state_assoc_unlikely() if !assume_fpu_began.
* in can_save_vector_registers_x86(), save_vector_registers_x86(), and restore_vector_registers_x86(), check for hard interrupt context first, to return early failure if current->pid is unusable.
* in save_vector_registers_x86(), tweak logic around WC_FPU_INHIBITED_FLAG, adding local_bh_disable()...local_bh_enable() to provide for safe recursion.
wolfcrypt/src/random.c: optimization: in Hash_df(), for WOLFSSL_LINUXKM, don't put digest[WC_SHA256_DIGEST_SIZE] in the heap, keep it on the stack.
wolfssl/wolfcrypt/types.h: add WOLFSSL_NO_ASM no-op definitions for DISABLE_VECTOR_REGISTERS() and REENABLE_VECTOR_REGISTERS().
configure.ac:
* move --enable-linuxkm and --enable-linuxkm-defaults initial detection early, so that HMAC_COPY_DEFAULT picks it up.
* add ENABLED_ENTROPY_MEMUSE_DEFAULT, and enable it by default when ENABLED_LINUXKM_DEFAULTS.
* update linuxkm-lkcapi-register help message.
linuxkm/linuxkm_wc_port.h:
* add my_kallsyms_lookup_name().
* add preempt_count, _raw_spin_lock_irqsave, _raw_spin_trylock, _raw_spin_unlock_irqrestore, and _cond_resched, to wolfssl_linuxkm_pie_redirect_table, and add spin_unlock_irqrestore() macro to mask native inline.
* move linuxkm mutex wrappers from wolfcrypt/src/wc_port.c to linuxkm_wc_port.h, make them inlines, and add new default spinlock-based implementation, with old method now gated on WOLFSSL_LINUXKM_USE_MUTEXES.
* change malloc() and realloc() wrappers from GFP_KERNEL to GFP_ATOMIC.
linuxkm/lkcapi_glue.c: make misc.h/misc.c inclusion unconditional, and trim now-redundant inclusions out of lkcapi_dh_glue.c and lkcapi_ecdh_glue.c.
linuxkm/x86_vector_register_glue.c: implement support for WC_FPU_INHIBITED_FLAG, and an `int inhibit_p` argument to save_vector_registers_x86();
wolfcrypt/src/random.c: implement linuxkm support for RDSEED and HAVE_ENTROPY_MEMUSE;
wolfssl/wolfcrypt/error-crypt.h and wolfcrypt/src/error.c: add WC_ACCEL_INHIBIT_E "Crypto acceleration is currently inhibited";
linuxkm/module_hooks.c and linuxkm/x86_vector_register_glue.c: remove broken and bit-rotten WOLFSSL_COMMERCIAL_LICENSE and LINUXKM_FPU_STATES_FOLLOW_THREADS code paths.
wolfcrypt/src/random.c: in Hash_DRBG_Generate(), always put digest[] on the stack even in WOLFSSL_SMALL_STACK configuration (it's only 32 bytes);
configure.ac: default smallstackcache on when linuxkm-defaults.
