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Eric Biggers 48d37cc423 crypto: user - support incremental algorithm dumps 
[ Upstream commit 0ac6b8fb23 ]

CRYPTO_MSG_GETALG in NLM_F_DUMP mode sometimes doesn't return all
registered crypto algorithms, because it doesn't support incremental
dumps.  crypto_dump_report() only permits itself to be called once, yet
the netlink subsystem allocates at most ~64 KiB for the skb being dumped
to.  Thus only the first recvmsg() returns data, and it may only include
a subset of the crypto algorithms even if the user buffer passed to
recvmsg() is large enough to hold all of them.

Fix this by using one of the arguments in the netlink_callback structure
to keep track of the current position in the algorithm list.  Then
userspace can do multiple recvmsg() on the socket after sending the dump
request.  This is the way netlink dumps work elsewhere in the kernel;
it's unclear why this was different (probably just an oversight).

Also fix an integer overflow when calculating the dump buffer size hint.

Fixes: a38f7907b9 ("crypto: Add userspace configuration API")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-05 09:20:04 +01:00
..
asymmetric_keys crypto: asymmetric_keys - select CRYPTO_HASH where needed 2019-07-26 09:14:13 +02:00
async_tx async_pq: Remove VLA usage 2018-06-18 20:17:38 +05:30
842.c crypto: acomp - add support for 842 via scomp 2016-10-25 11:08:33 +08:00
ablkcipher.c crypto: ablkcipher - fix crash flushing dcache in error path 2018-08-03 18:06:04 +08:00
acompress.c crypto: acomp - allow registration of multiple acomps 2017-04-21 20:30:50 +08:00
aead.c crypto: aead - set CRYPTO_TFM_NEED_KEY if ->setkey() fails 2019-03-23 20:09:54 +01:00
aegis.h crypto: aegis/generic - fix for big endian systems 2018-11-13 11:08:46 -08:00
aegis128.c crypto: aegis - fix handling chunked inputs 2019-03-23 20:09:54 +01:00
aegis128l.c crypto: aegis - fix handling chunked inputs 2019-03-23 20:09:54 +01:00
aegis256.c crypto: aegis - fix handling chunked inputs 2019-03-23 20:09:54 +01:00
aes_generic.c crypto: aes-generic - drop alignment requirement 2017-02-11 17:50:43 +08:00
aes_ti.c crypto: aes_ti - disable interrupts while accessing S-box 2019-02-12 19:46:58 +01:00
af_alg.c net: crypto set sk to NULL when af_alg_release. 2019-02-23 09:07:24 +01:00
ahash.c crypto: hash - set CRYPTO_TFM_NEED_KEY if ->setkey() fails 2019-03-23 20:09:54 +01:00
akcipher.c crypto: Replaced gcc specific attributes with macros from compiler.h 2017-01-13 00:24:39 +08:00
algapi.c crypto: api - laying defines and checks for statically allocated buffers 2018-04-21 00:58:32 +08:00
algboss.c crypto: algboss - remove redundant setting of len to zero 2017-10-07 12:10:34 +08:00
algif_aead.c Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
algif_hash.c net: remove sock_no_poll 2018-05-26 09:16:44 +02:00
algif_rng.c net: remove sock_no_poll 2018-05-26 09:16:44 +02:00
algif_skcipher.c Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
ansi_cprng.c
anubis.c
api.c evm: Don't deadlock if a crypto algorithm is unavailable 2018-07-18 07:27:22 -04:00
arc4.c
authenc.c crypto: authenc - fix parsing key with misaligned rta_len 2019-01-22 21:40:32 +01:00
authencesn.c crypto: authencesn - Avoid twice completion call in decrypt path 2019-01-22 21:40:31 +01:00
blkcipher.c crypto: blkcipher - fix crash flushing dcache in error path 2018-08-03 18:06:04 +08:00
blowfish_common.c
blowfish_generic.c
camellia_generic.c crypto: replace FSF address with web source in license notices 2017-11-29 17:33:25 +11:00
cast5_generic.c crypto: replace FSF address with web source in license notices 2017-11-29 17:33:25 +11:00
cast6_generic.c crypto: replace FSF address with web source in license notices 2017-11-29 17:33:25 +11:00
cast_common.c
cbc.c crypto: do not free algorithm before using 2018-12-13 09:16:21 +01:00
ccm.c crypto: ccm - fix incompatibility between "ccm" and "ccm_base" 2019-05-22 07:37:43 +02:00
cfb.c crypto: cfb - remove bogus memcpy() with src == dest 2019-03-23 20:09:40 +01:00
chacha20_generic.c crypto: chacha20 - Fix chacha20_block() keystream alignment (again) 2019-11-20 18:47:11 +01:00
chacha20poly1305.c crypto: chacha20poly1305 - fix atomic sleep when using async algorithm 2019-07-26 09:14:19 +02:00
cipher.c crypto: remove several VLAs 2018-04-21 00:58:34 +08:00
cmac.c crypto: algapi - make crypto_xor() and crypto_inc() alignment agnostic 2017-02-11 17:52:28 +08:00
compress.c crypto: api - Remove no-op exit_ops code 2016-10-21 11:03:42 +08:00
crc32_generic.c crypto: crc32-generic - remove __crc32_le() 2018-05-27 00:12:09 +08:00
crc32c_generic.c crypto: crc32c-generic - remove cra_alignmask 2018-05-27 00:12:08 +08:00
crct10dif_common.c
crct10dif_generic.c crypto: crct10dif-generic - fix use via crypto_shash_digest() 2019-05-22 07:37:37 +02:00
cryptd.c crypto: cryptd - Fix skcipher instance memory leak 2019-07-10 09:53:41 +02:00
crypto_engine.c crypto: engine - Permit to enqueue all async requests 2018-02-15 23:26:50 +08:00
crypto_null.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
crypto_user.c crypto: user - support incremental algorithm dumps 2019-12-05 09:20:04 +01:00
crypto_wq.c
ctr.c crypto: remove several VLAs 2018-04-21 00:58:34 +08:00
cts.c crypto: remove several VLAs 2018-04-21 00:58:34 +08:00
deflate.c crypto: scomp - add support for deflate rfc1950 (zlib) 2017-04-24 18:11:08 +08:00
des_generic.c
dh.c crypto: dh - fix memory leak 2018-07-20 13:51:21 +08:00
dh_helper.c crypto: dh - make crypto_dh_encode_key() make robust 2018-08-03 18:06:06 +08:00
drbg.c crypto: drbg - in-place cipher operation for CTR 2018-08-03 18:05:48 +08:00
ecb.c
ecc.c crypto: ecc - regularize scalar for scalar multiplication 2019-01-26 09:32:35 +01:00
ecc.h crypto: ecc - Actually remove stack VLA usage 2018-04-21 00:58:29 +08:00
ecc_curve_defs.h crypto: ecdh - fix typo of P-192 b value 2018-07-20 13:51:22 +08:00
ecdh.c crypto: ecc - Actually remove stack VLA usage 2018-04-21 00:58:29 +08:00
ecdh_helper.c crypto: ecdh - return unsigned value for crypto_ecdh_key_len() 2017-10-12 22:55:00 +08:00
echainiv.c crypto: echainiv - Remove unused alg/spawn variable 2017-12-22 19:52:45 +11:00
fcrypt.c
fips.c
gcm.c crypto: gcm - fix incompatibility between "gcm" and "gcm_base" 2019-05-22 07:37:37 +02:00
gf128mul.c crypto: gf128mul - remove incorrect comment 2017-12-22 19:52:40 +11:00
ghash-generic.c crypto: ghash - fix unaligned memory access in ghash_setkey() 2019-07-26 09:14:19 +02:00
hash_info.c
hmac.c crypto: hmac - require that the underlying hash algorithm is unkeyed 2017-11-29 13:39:15 +11:00
internal.h crypto: api - Make crypto_alg_lookup static 2018-03-31 01:32:58 +08:00
jitterentropy-kcapi.c crypto: jitterentropy - drop duplicate header module.h 2016-11-17 23:34:52 +08:00
jitterentropy.c
Kconfig crypto: aes_ti - disable interrupts while accessing S-box 2019-02-12 19:46:58 +01:00
keywrap.c crypto: keywrap - Add missing ULL suffixes for 64-bit constants 2017-11-29 17:33:26 +11:00
khazad.c
kpp.c crypto: Replaced gcc specific attributes with macros from compiler.h 2017-01-13 00:24:39 +08:00
lrw.c crypto: lrw - Fix out-of bounds access on counter overflow 2018-11-13 11:08:45 -08:00
lz4.c crypto: lz4 - fixed decompress function to return error code 2017-04-10 19:17:27 +08:00
lz4hc.c crypto: lz4 - fixed decompress function to return error code 2017-04-10 19:17:27 +08:00
lzo.c treewide: use kv[mz]alloc* rather than opencoded variants 2017-05-08 17:15:13 -07:00
Makefile crypto: speck - remove Speck 2018-11-13 11:08:46 -08:00
mcryptd.c crypto: mcryptd - remove pointless wrapper functions 2018-02-15 23:26:45 +08:00
md4.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
md5.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
memneq.c
michael_mic.c
morus640.c crypto: morus - fix handling chunked inputs 2019-03-23 20:09:54 +01:00
morus1280.c crypto: morus - fix handling chunked inputs 2019-03-23 20:09:54 +01:00
pcbc.c crypto: pcbc - remove bogus memcpy()s with src == dest 2019-03-23 20:09:55 +01:00
pcrypt.c crypto: pcrypt - fix freeing pcrypt instances 2017-12-22 19:02:47 +11:00
poly1305_generic.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
proc.c proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
ripemd.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rmd128.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
rmd160.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
rmd256.c crypto: rmd256 - use swap macro in rmd256_transform 2018-07-27 19:28:36 +08:00
rmd320.c crypto: rmd320 - use swap macro in rmd320_transform 2018-07-27 19:28:36 +08:00
rng.c crypto: rng - ensure that the RNG is ready before using 2017-07-28 17:56:00 +08:00
rsa-pkcs1pad.c crypto: fix a memory leak in rsa-kcs1pad's encryption mode 2019-11-20 18:47:44 +01:00
rsa.c crypto: rsa - Remove unneeded error assignment 2018-04-21 00:58:37 +08:00
rsa_helper.c kbuild: rename *-asn1.[ch] to *.asn1.[ch] 2018-04-07 19:04:02 +09:00
rsaprivkey.asn1 crypto: rsa - Store rest of the private key components 2016-07-05 23:05:26 +08:00
rsapubkey.asn1
salsa20_generic.c crypto: salsa20 - don't access already-freed walk.iv 2019-05-22 07:37:36 +02:00
scatterwalk.c crypto: scatterwalk - remove 'chain' argument from scatterwalk_crypto_chain() 2018-08-03 18:06:03 +08:00
scompress.c crypto: scompress - use sgl_alloc() and sgl_free() 2018-01-06 09:18:00 -07:00
seed.c
seqiv.c crypto: seqiv - Remove unused alg/spawn variable 2017-12-22 19:52:45 +11:00
serpent_generic.c crypto: serpent - mark __serpent_setkey_sbox noinline 2019-07-26 09:14:13 +02:00
sha1_generic.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
sha3_generic.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux 2018-08-03 17:55:12 +08:00
sha256_generic.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
sha512_generic.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
shash.c crypto: hash - set CRYPTO_TFM_NEED_KEY if ->setkey() fails 2019-03-23 20:09:54 +01:00
simd.c crypto: simd - correctly take reqsize of wrapped skcipher into account 2018-12-01 09:37:32 +01:00
skcipher.c crypto: skcipher - Unmap pages after an external error 2019-10-11 18:20:52 +02:00
sm3_generic.c crypto: sm3 - fix undefined shift by >= width of value 2019-01-22 21:40:31 +01:00
sm4_generic.c crypto: sm4 - export encrypt/decrypt routines to other drivers 2018-05-05 14:52:51 +08:00
tcrypt.c crypto: testmgr - add AES-CFB tests 2019-01-09 17:38:44 +01:00
tcrypt.h
tea.c
testmgr.c crypto: testmgr - fix sizeof() on COMP_BUF_SIZE 2019-12-01 09:16:13 +01:00
testmgr.h crypto: x86/poly1305 - fix overflow during partial reduction 2019-04-27 09:36:37 +02:00
tgr192.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
twofish_common.c crypto: replace FSF address with web source in license notices 2017-11-29 17:33:25 +11:00
twofish_generic.c crypto: replace FSF address with web source in license notices 2017-11-29 17:33:25 +11:00
vmac.c crypto: vmac - remove insecure version with hardcoded nonce 2018-07-01 21:00:44 +08:00
wp512.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
xcbc.c crypto: replace FSF address with web source in license notices 2017-11-29 17:33:25 +11:00
xor.c kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK 2017-11-15 18:21:04 -08:00
xts.c crypto: scatterwalk - remove 'chain' argument from scatterwalk_crypto_chain() 2018-08-03 18:06:03 +08:00
zstd.c crypto: zstd - Add zstd support 2018-04-21 00:58:30 +08:00