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2017-12-08X.509: fix comparisons of ->pkey_algoEric Biggers
->pkey_algo used to be an enum, but was changed to a string by commit 4e8ae72a75aa ("X.509: Make algo identifiers text instead of enum"). But two comparisons were not updated. Fix them to use strcmp(). This bug broke signature verification in certain configurations, depending on whether the string constants were deduplicated or not. Fixes: 4e8ae72a75aa ("X.509: Make algo identifiers text instead of enum") Cc: <stable@vger.kernel.org> # v4.6+ Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com>
2017-12-08X.509: use crypto_shash_digest()Eric Biggers
Use crypto_shash_digest() instead of crypto_shash_init() followed by crypto_shash_finup(). (For simplicity only; they are equivalent.) Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com>
2017-12-08KEYS: be careful with error codes in public_key_verify_signature()Eric Biggers
In public_key_verify_signature(), if akcipher_request_alloc() fails, we return -ENOMEM. But that error code was set 25 lines above, and by accident someone could easily insert new code in between that assigns to 'ret', which would introduce a signature verification bypass. Make the code clearer by moving the -ENOMEM down to where it is used. Additionally, the callers of public_key_verify_signature() only consider a negative return value to be an error. This means that if any positive return value is accidentally introduced deeper in the call stack (e.g. 'return EBADMSG' instead of 'return -EBADMSG' somewhere in RSA), signature verification will be bypassed. Make things more robust by having public_key_verify_signature() warn about positive errors and translate them into -EINVAL. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com>
2017-12-08pkcs7: use crypto_shash_digest()Eric Biggers
Use crypto_shash_digest() instead of crypto_shash_init() followed by crypto_shash_finup(). (For simplicity only; they are equivalent.) Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com>
2017-12-08pkcs7: fix check for self-signed certificateEric Biggers
pkcs7_validate_trust_one() used 'x509->next == x509' to identify a self-signed certificate. That's wrong; ->next is simply the link in the linked list of certificates in the PKCS#7 message. It should be checking ->signer instead. Fix it. Fortunately this didn't actually matter because when we re-visited 'x509' on the next iteration via 'x509->signer', it was already seen and not verified, so we returned -ENOKEY anyway. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <james.l.morris@oracle.com>
2017-12-08pkcs7: return correct error code if pkcs7_check_authattrs() failsEric Biggers
If pkcs7_check_authattrs() returns an error code, we should pass that error code on, rather than using ENOMEM. Fixes: 99db44350672 ("PKCS#7: Appropriately restrict authenticated attributes and content type") Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <james.l.morris@oracle.com>
2017-12-08X.509: reject invalid BIT STRING for subjectPublicKeyEric Biggers
Adding a specially crafted X.509 certificate whose subjectPublicKey ASN.1 value is zero-length caused x509_extract_key_data() to set the public key size to SIZE_MAX, as it subtracted the nonexistent BIT STRING metadata byte. Then, x509_cert_parse() called kmemdup() with that bogus size, triggering the WARN_ON_ONCE() in kmalloc_slab(). This appears to be harmless, but it still must be fixed since WARNs are never supposed to be user-triggerable. Fix it by updating x509_cert_parse() to validate that the value has a BIT STRING metadata byte, and that the byte is 0 which indicates that the number of bits in the bitstring is a multiple of 8. It would be nice to handle the metadata byte in asn1_ber_decoder() instead. But that would be tricky because in the general case a BIT STRING could be implicitly tagged, and/or could legitimately have a length that is not a whole number of bytes. Here was the WARN (cleaned up slightly): WARNING: CPU: 1 PID: 202 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 mm/slab_common.c:971 Modules linked in: CPU: 1 PID: 202 Comm: keyctl Tainted: G B 4.14.0-09238-g1d3b78bbc6e9 #26 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-20171110_100015-anatol 04/01/2014 task: ffff880033014180 task.stack: ffff8800305c8000 Call Trace: __do_kmalloc mm/slab.c:3706 [inline] __kmalloc_track_caller+0x22/0x2e0 mm/slab.c:3726 kmemdup+0x17/0x40 mm/util.c:118 kmemdup include/linux/string.h:414 [inline] x509_cert_parse+0x2cb/0x620 crypto/asymmetric_keys/x509_cert_parser.c:106 x509_key_preparse+0x61/0x750 crypto/asymmetric_keys/x509_public_key.c:174 asymmetric_key_preparse+0xa4/0x150 crypto/asymmetric_keys/asymmetric_type.c:388 key_create_or_update+0x4d4/0x10a0 security/keys/key.c:850 SYSC_add_key security/keys/keyctl.c:122 [inline] SyS_add_key+0xe8/0x290 security/keys/keyctl.c:62 entry_SYSCALL_64_fastpath+0x1f/0x96 Fixes: 42d5ec27f873 ("X.509: Add an ASN.1 decoder") Cc: <stable@vger.kernel.org> # v3.7+ Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <james.l.morris@oracle.com>
2017-11-28Merge branch 'linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto fixes from Herbert Xu: - avoid potential bogus alignment for some AEAD operations - fix crash in algif_aead - avoid sleeping in softirq context with async af_alg * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: skcipher - Fix skcipher_walk_aead_common crypto: af_alg - remove locking in async callback crypto: algif_aead - skip SGL entries with NULL page
2017-11-25crypto: skcipher - Fix skcipher_walk_aead_commonOndrej Mosnáček
The skcipher_walk_aead_common function calls scatterwalk_copychunks on the input and output walks to skip the associated data. If the AD end at an SG list entry boundary, then after these calls the walks will still be pointing to the end of the skipped region. These offsets are later checked for alignment in skcipher_walk_next, so the skcipher_walk may detect the alignment incorrectly. This patch fixes it by calling scatterwalk_done after the copychunks calls to ensure that the offsets refer to the right SG list entry. Fixes: b286d8b1a690 ("crypto: skcipher - Add skcipher walk interface") Cc: <stable@vger.kernel.org> Signed-off-by: Ondrej Mosnacek <omosnacek@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-24crypto: af_alg - remove locking in async callbackStephan Mueller
The code paths protected by the socket-lock do not use or modify the socket in a non-atomic fashion. The actions pertaining the socket do not even need to be handled as an atomic operation. Thus, the socket-lock can be safely ignored. This fixes a bug regarding scheduling in atomic as the callback function may be invoked in interrupt context. In addition, the sock_hold is moved before the AIO encrypt/decrypt operation to ensure that the socket is always present. This avoids a tiny race window where the socket is unprotected and yet used by the AIO operation. Finally, the release of resources for a crypto operation is moved into a common function of af_alg_free_resources. Cc: <stable@vger.kernel.org> Fixes: e870456d8e7c8 ("crypto: algif_skcipher - overhaul memory management") Fixes: d887c52d6ae43 ("crypto: algif_aead - overhaul memory management") Reported-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Tested-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-24crypto: algif_aead - skip SGL entries with NULL pageStephan Mueller
The TX SGL may contain SGL entries that are assigned a NULL page. This may happen if a multi-stage AIO operation is performed where the data for each stage is pointed to by one SGL entry. Upon completion of that stage, af_alg_pull_tsgl will assign NULL to the SGL entry. The NULL cipher used to copy the AAD from TX SGL to the destination buffer, however, cannot handle the case where the SGL starts with an SGL entry having a NULL page. Thus, the code needs to advance the start pointer into the SGL to the first non-NULL entry. This fixes a crash visible on Intel x86 32 bit using the libkcapi test suite. Cc: <stable@vger.kernel.org> Fixes: 72548b093ee38 ("crypto: algif_aead - copy AAD from src to dst") Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-24Merge tag 'keys-next-20171123' of ↵James Morris
git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs into next-keys Merge keys subsystem changes from David Howells, for v4.15.
2017-11-15kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACKLevin, Alexander (Sasha Levin)
Convert all allocations that used a NOTRACK flag to stop using it. Link: http://lkml.kernel.org/r/20171007030159.22241-3-alexander.levin@verizon.com Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Cc: Alexander Potapenko <glider@google.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tim Hansen <devtimhansen@gmail.com> Cc: Vegard Nossum <vegardno@ifi.uio.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-15pkcs7: Set the module licence to prevent taintingDavid Howells
Set the module licence to prevent the kernel from being tainted if loaded as a module. Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: David Howells <dhowells@redhat.com>
2017-11-14Merge branch 'linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto updates from Herbert Xu: "Here is the crypto update for 4.15: API: - Disambiguate EBUSY when queueing crypto request by adding ENOSPC. This change touches code outside the crypto API. - Reset settings when empty string is written to rng_current. Algorithms: - Add OSCCA SM3 secure hash. Drivers: - Remove old mv_cesa driver (replaced by marvell/cesa). - Enable rfc3686/ecb/cfb/ofb AES in crypto4xx. - Add ccm/gcm AES in crypto4xx. - Add support for BCM7278 in iproc-rng200. - Add hash support on Exynos in s5p-sss. - Fix fallback-induced error in vmx. - Fix output IV in atmel-aes. - Fix empty GCM hash in mediatek. Others: - Fix DoS potential in lib/mpi. - Fix potential out-of-order issues with padata" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (162 commits) lib/mpi: call cond_resched() from mpi_powm() loop crypto: stm32/hash - Fix return issue on update crypto: dh - Remove pointless checks for NULL 'p' and 'g' crypto: qat - Clean up error handling in qat_dh_set_secret() crypto: dh - Don't permit 'key' or 'g' size longer than 'p' crypto: dh - Don't permit 'p' to be 0 crypto: dh - Fix double free of ctx->p hwrng: iproc-rng200 - Add support for BCM7278 dt-bindings: rng: Document BCM7278 RNG200 compatible crypto: chcr - Replace _manual_ swap with swap macro crypto: marvell - Add a NULL entry at the end of mv_cesa_plat_id_table[] hwrng: virtio - Virtio RNG devices need to be re-registered after suspend/resume crypto: atmel - remove empty functions crypto: ecdh - remove empty exit() MAINTAINERS: update maintainer for qat crypto: caam - remove unused param of ctx_map_to_sec4_sg() crypto: caam - remove unneeded edesc zeroization crypto: atmel-aes - Reset the controller before each use crypto: atmel-aes - properly set IV after {en,de}crypt hwrng: core - Reset user selected rng by writing "" to rng_current ...
2017-11-10crypto: dh - Remove pointless checks for NULL 'p' and 'g'Eric Biggers
Neither 'p' nor 'g' can be NULL, as they were unpacked using crypto_dh_decode_key(). And it makes no sense for them to be optional. So remove the NULL checks that were copy-and-pasted into both modules. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-10crypto: dh - Don't permit 'key' or 'g' size longer than 'p'Eric Biggers
The "qat-dh" DH implementation assumes that 'key' and 'g' can be copied into a buffer with size 'p_size'. However it was never checked that that was actually the case, which most likely allowed users to cause a buffer underflow via KEYCTL_DH_COMPUTE. Fix this by updating crypto_dh_decode_key() to verify this precondition for all DH implementations. Fixes: c9839143ebbf ("crypto: qat - Add DH support") Cc: <stable@vger.kernel.org> # v4.8+ Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-10crypto: dh - Don't permit 'p' to be 0Eric Biggers
If 'p' is 0 for the software Diffie-Hellman implementation, then dh_max_size() returns 0. In the case of KEYCTL_DH_COMPUTE, this causes ZERO_SIZE_PTR to be passed to sg_init_one(), which with CONFIG_DEBUG_SG=y triggers the 'BUG_ON(!virt_addr_valid(buf));' in sg_set_buf(). Fix this by making crypto_dh_decode_key() reject 0 for 'p'. p=0 makes no sense for any DH implementation because 'p' is supposed to be a prime number. Moreover, 'mod 0' is not mathematically defined. Bug report: kernel BUG at ./include/linux/scatterlist.h:140! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 27112 Comm: syz-executor2 Not tainted 4.14.0-rc7-00010-gf5dbb5d0ce32-dirty #7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.3-20171021_125229-anatol 04/01/2014 task: ffff88006caac0c0 task.stack: ffff88006c7c8000 RIP: 0010:sg_set_buf include/linux/scatterlist.h:140 [inline] RIP: 0010:sg_init_one+0x1b3/0x240 lib/scatterlist.c:156 RSP: 0018:ffff88006c7cfb08 EFLAGS: 00010216 RAX: 0000000000010000 RBX: ffff88006c7cfe30 RCX: 00000000000064ee RDX: ffffffff81cf64c3 RSI: ffffc90000d72000 RDI: ffffffff92e937e0 RBP: ffff88006c7cfb30 R08: ffffed000d8f9fab R09: ffff88006c7cfd30 R10: 0000000000000005 R11: ffffed000d8f9faa R12: ffff88006c7cfd30 R13: 0000000000000000 R14: 0000000000000010 R15: ffff88006c7cfc50 FS: 00007fce190fa700(0000) GS:ffff88003ea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffc6b33db8 CR3: 000000003cf64000 CR4: 00000000000006f0 Call Trace: __keyctl_dh_compute+0xa95/0x19b0 security/keys/dh.c:360 keyctl_dh_compute+0xac/0x100 security/keys/dh.c:434 SYSC_keyctl security/keys/keyctl.c:1745 [inline] SyS_keyctl+0x72/0x2c0 security/keys/keyctl.c:1641 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4585c9 RSP: 002b:00007fce190f9bd8 EFLAGS: 00000216 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 0000000000738020 RCX: 00000000004585c9 RDX: 000000002000d000 RSI: 0000000020000ff4 RDI: 0000000000000017 RBP: 0000000000000046 R08: 0000000020008000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00007fff6e610cde R13: 00007fff6e610cdf R14: 00007fce190fa700 R15: 0000000000000000 Code: 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 33 5b 45 89 6c 24 14 41 5c 41 5d 41 5e 41 5f 5d c3 e8 fd 8f 68 ff <0f> 0b e8 f6 8f 68 ff 0f 0b e8 ef 8f 68 ff 0f 0b e8 e8 8f 68 ff 20 RIP: sg_set_buf include/linux/scatterlist.h:140 [inline] RSP: ffff88006c7cfb08 RIP: sg_init_one+0x1b3/0x240 lib/scatterlist.c:156 RSP: ffff88006c7cfb08 Fixes: 802c7f1c84e4 ("crypto: dh - Add DH software implementation") Cc: <stable@vger.kernel.org> # v4.8+ Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-10crypto: dh - Fix double free of ctx->pEric Biggers
When setting the secret with the software Diffie-Hellman implementation, if allocating 'g' failed (e.g. if it was longer than MAX_EXTERN_MPI_BITS), then 'p' was freed twice: once immediately, and once later when the crypto_kpp tfm was destroyed. Fix it by using dh_free_ctx() (renamed to dh_clear_ctx()) in the error paths, as that correctly sets the pointers to NULL. KASAN report: MPI: mpi too large (32760 bits) ================================================================== BUG: KASAN: use-after-free in mpi_free+0x131/0x170 Read of size 4 at addr ffff88006c7cdf90 by task reproduce_doubl/367 CPU: 1 PID: 367 Comm: reproduce_doubl Not tainted 4.14.0-rc7-00040-g05298abde6fe #7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: dump_stack+0xb3/0x10b ? mpi_free+0x131/0x170 print_address_description+0x79/0x2a0 ? mpi_free+0x131/0x170 kasan_report+0x236/0x340 ? akcipher_register_instance+0x90/0x90 __asan_report_load4_noabort+0x14/0x20 mpi_free+0x131/0x170 ? akcipher_register_instance+0x90/0x90 dh_exit_tfm+0x3d/0x140 crypto_kpp_exit_tfm+0x52/0x70 crypto_destroy_tfm+0xb3/0x250 __keyctl_dh_compute+0x640/0xe90 ? kasan_slab_free+0x12f/0x180 ? dh_data_from_key+0x240/0x240 ? key_create_or_update+0x1ee/0xb20 ? key_instantiate_and_link+0x440/0x440 ? lock_contended+0xee0/0xee0 ? kfree+0xcf/0x210 ? SyS_add_key+0x268/0x340 keyctl_dh_compute+0xb3/0xf1 ? __keyctl_dh_compute+0xe90/0xe90 ? SyS_add_key+0x26d/0x340 ? entry_SYSCALL_64_fastpath+0x5/0xbe ? trace_hardirqs_on_caller+0x3f4/0x560 SyS_keyctl+0x72/0x2c0 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x43ccf9 RSP: 002b:00007ffeeec96158 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa RAX: ffffffffffffffda RBX: 000000000248b9b9 RCX: 000000000043ccf9 RDX: 00007ffeeec96170 RSI: 00007ffeeec96160 RDI: 0000000000000017 RBP: 0000000000000046 R08: 0000000000000000 R09: 0248b9b9143dc936 R10: 0000000000001000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000409670 R14: 0000000000409700 R15: 0000000000000000 Allocated by task 367: save_stack_trace+0x16/0x20 kasan_kmalloc+0xeb/0x180 kmem_cache_alloc_trace+0x114/0x300 mpi_alloc+0x4b/0x230 mpi_read_raw_data+0xbe/0x360 dh_set_secret+0x1dc/0x460 __keyctl_dh_compute+0x623/0xe90 keyctl_dh_compute+0xb3/0xf1 SyS_keyctl+0x72/0x2c0 entry_SYSCALL_64_fastpath+0x1f/0xbe Freed by task 367: save_stack_trace+0x16/0x20 kasan_slab_free+0xab/0x180 kfree+0xb5/0x210 mpi_free+0xcb/0x170 dh_set_secret+0x2d7/0x460 __keyctl_dh_compute+0x623/0xe90 keyctl_dh_compute+0xb3/0xf1 SyS_keyctl+0x72/0x2c0 entry_SYSCALL_64_fastpath+0x1f/0xbe Fixes: 802c7f1c84e4 ("crypto: dh - Add DH software implementation") Cc: <stable@vger.kernel.org> # v4.8+ Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-06Merge branch 'linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto fixes from Herbert Xu: "This fixes an unaligned panic in x86/sha-mb and a bug in ccm that triggers with certain underlying implementations" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: ccm - preserve the IV buffer crypto: x86/sha1-mb - fix panic due to unaligned access crypto: x86/sha256-mb - fix panic due to unaligned access
2017-11-06crypto: ecdh - remove empty exit()Tudor-Dan Ambarus
Pointer members of an object with static storage duration, if not explicitly initialized, will be initialized to a NULL pointer. The crypto API checks if this pointer is not NULL before using it, we are safe to remove the function. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: tcrypt - move to generic async completionGilad Ben-Yossef
tcrypt starts several async crypto ops and waits for their completions. Move it over to generic code doing the same. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: testmgr - move to generic async completionGilad Ben-Yossef
testmgr is starting async. crypto ops and waiting for them to complete. Move it over to generic code doing the same. This also provides a test of the generic crypto async. wait code. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: gcm - move to generic async completionGilad Ben-Yossef
gcm is starting an async. crypto op and waiting for it complete. Move it over to generic code doing the same. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: drbg - move to generic async completionGilad Ben-Yossef
DRBG is starting an async. crypto op and waiting for it complete. Move it over to generic code doing the same. The code now also passes CRYPTO_TFM_REQ_MAY_SLEEP flag indicating crypto request memory allocation may use GFP_KERNEL which should be perfectly fine as the code is obviously sleeping for the completion of the request any way. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: move pub key to generic async completionGilad Ben-Yossef
public_key_verify_signature() is starting an async crypto op and waiting for it to complete. Move it over to generic code doing the same. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: algif - move to generic async completionGilad Ben-Yossef
algif starts several async crypto ops and waits for their completion. Move it over to generic code doing the same. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: introduce crypto wait for async opGilad Ben-Yossef
Invoking a possibly async. crypto op and waiting for completion while correctly handling backlog processing is a common task in the crypto API implementation and outside users of it. This patch adds a generic implementation for doing so in preparation for using it across the board instead of hand rolled versions. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> CC: Eric Biggers <ebiggers3@gmail.com> CC: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: remove redundant backlog checks on EBUSYGilad Ben-Yossef
Now that -EBUSY return code only indicates backlog queueing we can safely remove the now redundant check for the CRYPTO_TFM_REQ_MAY_BACKLOG flag when -EBUSY is returned. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: change transient busy return code to -ENOSPCGilad Ben-Yossef
The crypto API was using the -EBUSY return value to indicate both a hard failure to submit a crypto operation into a transformation provider when the latter was busy and the backlog mechanism was not enabled as well as a notification that the operation was queued into the backlog when the backlog mechanism was enabled. Having the same return code indicate two very different conditions depending on a flag is both error prone and requires extra runtime check like the following to discern between the cases: if (err == -EINPROGRESS || (err == -EBUSY && (ahash_request_flags(req) & CRYPTO_TFM_REQ_MAY_BACKLOG))) This patch changes the return code used to indicate a crypto op failed due to the transformation provider being transiently busy to -ENOSPC. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: tcrypt - fix buffer lengths in test_aead_speed()Robert Baronescu
Fix the way the length of the buffers used for encryption / decryption are computed. For e.g. in case of encryption, input buffer does not contain an authentication tag. Signed-off-by: Robert Baronescu <robert.baronescu@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: tcrypt - mark expected switch fall-throughs in do_test()Gustavo A. R. Silva
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-crypto@vger.kernel.org Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: gf128mul - The x8_ble multiplication functionsHarsh Jain
It multiply GF(2^128) elements in the ble format. It will be used by chelsio driver to speed up gf multiplication. Signed-off-by: Harsh Jain <harsh@chelsio.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-03crypto: ccm - preserve the IV bufferRomain Izard
The IV buffer used during CCM operations is used twice, during both the hashing step and the ciphering step. When using a hardware accelerator that updates the contents of the IV buffer at the end of ciphering operations, the value will be modified. In the decryption case, the subsequent setup of the hashing algorithm will interpret the updated IV instead of the original value, which can lead to out-of-bounds writes. Reuse the idata buffer, only used in the hashing step, to preserve the IV's value during the ciphering step in the decryption case. Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com> Cc: <stable@vger.kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-19Merge commit 'tags/keys-fixes-20171018' into fixes-v4.14-rc5James Morris
2017-10-18pkcs7: Prevent NULL pointer dereference, since sinfo is not always set.Eric Sesterhenn
The ASN.1 parser does not necessarily set the sinfo field, this patch prevents a NULL pointer dereference on broken input. Fixes: 99db44350672 ("PKCS#7: Appropriately restrict authenticated attributes and content type") Signed-off-by: Eric Sesterhenn <eric.sesterhenn@x41-dsec.de> Signed-off-by: David Howells <dhowells@redhat.com> cc: stable@vger.kernel.org # 4.3+
2017-10-18KEYS: checking the input id parameters before finding asymmetric keyChun-Yi Lee
For finding asymmetric key, the input id_0 and id_1 parameters can not be NULL at the same time. This patch adds the BUG_ON checking for id_0 and id_1. Cc: David Howells <dhowells@redhat.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Chun-Yi Lee <jlee@suse.com> Signed-off-by: David Howells <dhowells@redhat.com>
2017-10-18KEYS: Fix the wrong index when checking the existence of second idChun-Yi Lee
Fix the wrong index number when checking the existence of second id in function of finding asymmetric key. The id_1 is the second id that the index in array must be 1 but not 0. Fixes: 9eb029893ad5 (KEYS: Generalise x509_request_asymmetric_key()) Cc: David Howells <dhowells@redhat.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Chun-Yi Lee <jlee@suse.com> Signed-off-by: David Howells <dhowells@redhat.com>
2017-10-12crypto: keywrap - simplify codeStephan Mueller
The code is simplified by using two __be64 values for the operation instead of using two arrays of u8. This allows to get rid of the memory alignment code. In addition, the crypto_xor can be replaced with a native XOR operation. Finally, the definition of the variables is re-arranged such that the data structures come before simple variables to potentially reduce memory space. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-12crypto: dh - return unsigned value for crypto_dh_key_len()Tudor-Dan Ambarus
DH_KPP_SECRET_MIN_SIZE and dh_data_size() are both returning unsigned values. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-12crypto: dh - return unsigned int for dh_data_size()Tudor-Dan Ambarus
p->key_size, p->p_size, p->g_size are all of unsigned int type. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-12crypto: ecdh - return unsigned value for crypto_ecdh_key_len()Tudor-Dan Ambarus
ECDH_KPP_SECRET_MIN_SIZE and params->key_size are both returning unsigned values. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-12crypto: lrw - Check for incorrect cipher nameChristophe Jaillet
If the cipher name does not start with 'ecb(' we should bail out, as done in the 'create()' function in 'crypto/xts.c'. Fixes: 700cb3f5fe75 ("crypto: lrw - Convert to skcipher") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-12crypto: lrw - Fix an error handling path in 'create()'Christophe Jaillet
All error handling paths 'goto err_drop_spawn' except this one. In order to avoid some resources leak, we should do it as well here. Fixes: 700cb3f5fe75 ("crypto: lrw - Convert to skcipher") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-11crypto: shash - Fix zero-length shash ahash digest crashHerbert Xu
The shash ahash digest adaptor function may crash if given a zero-length input together with a null SG list. This is because it tries to read the SG list before looking at the length. This patch fixes it by checking the length first. Cc: <stable@vger.kernel.org> Reported-by: Stephan Müller<smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Stephan Müller <smueller@chronox.de>
2017-10-07crypto: algboss - remove redundant setting of len to zeroColin Ian King
The variable len is set to zero, never read and then later updated to p - name, so clearly the zero'ing of len is redundant and can be removed. Detected by clang scan-build: " warning: Value stored to 'len' is never read" Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-07crypto: skcipher - Fix crash on zero-length inputHerbert Xu
The skcipher walk interface doesn't handle zero-length input properly as the old blkcipher walk interface did. This is due to the fact that the length check is done too late. This patch moves the length check forward so that it does the right thing. Fixes: b286d8b1a690 ("crypto: skcipher - Add skcipher walk...") Cc: <stable@vger.kernel.org> Reported-by: Stephan Müller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-07crypto: shash - Fix a sleep-in-atomic bug in shash_setkey_unalignedJia-Ju Bai
The SCTP program may sleep under a spinlock, and the function call path is: sctp_generate_t3_rtx_event (acquire the spinlock) sctp_do_sm sctp_side_effects sctp_cmd_interpreter sctp_make_init_ack sctp_pack_cookie crypto_shash_setkey shash_setkey_unaligned kmalloc(GFP_KERNEL) For the same reason, the orinoco driver may sleep in interrupt handler, and the function call path is: orinoco_rx_isr_tasklet orinoco_rx orinoco_mic crypto_shash_setkey shash_setkey_unaligned kmalloc(GFP_KERNEL) To fix it, GFP_KERNEL is replaced with GFP_ATOMIC. This bug is found by my static analysis tool and my code review. Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2017-10-07crypto: xts - Fix an error handling path in 'create()'Christophe Jaillet
All error handling paths 'goto err_drop_spawn' except this one. In order to avoid some resources leak, we should do it as well here. Fixes: f1c131b45410 ("crypto: xts - Convert to skcipher") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>