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Johannes Berg 8cb081746c netlink: make validation more configurable for future strictness 
We currently have two levels of strict validation:

 1) liberal (default)
     - undefined (type >= max) & NLA_UNSPEC attributes accepted
     - attribute length >= expected accepted
     - garbage at end of message accepted
 2) strict (opt-in)
     - NLA_UNSPEC attributes accepted
     - attribute length >= expected accepted

Split out parsing strictness into four different options:
 * TRAILING     - check that there's no trailing data after parsing
                  attributes (in message or nested)
 * MAXTYPE      - reject attrs > max known type
 * UNSPEC       - reject attributes with NLA_UNSPEC policy entries
 * STRICT_ATTRS - strictly validate attribute size

The default for future things should be *everything*.
The current *_strict() is a combination of TRAILING and MAXTYPE,
and is renamed to _deprecated_strict().
The current regular parsing has none of this, and is renamed to
*_parse_deprecated().

Additionally it allows us to selectively set one of the new flags
even on old policies. Notably, the UNSPEC flag could be useful in
this case, since it can be arranged (by filling in the policy) to
not be an incompatible userspace ABI change, but would then going
forward prevent forgetting attribute entries. Similar can apply
to the POLICY flag.

We end up with the following renames:
 * nla_parse           -> nla_parse_deprecated
 * nla_parse_strict    -> nla_parse_deprecated_strict
 * nlmsg_parse         -> nlmsg_parse_deprecated
 * nlmsg_parse_strict  -> nlmsg_parse_deprecated_strict
 * nla_parse_nested    -> nla_parse_nested_deprecated
 * nla_validate_nested -> nla_validate_nested_deprecated

Using spatch, of course:
    @@
    expression TB, MAX, HEAD, LEN, POL, EXT;
    @@
    -nla_parse(TB, MAX, HEAD, LEN, POL, EXT)
    +nla_parse_deprecated(TB, MAX, HEAD, LEN, POL, EXT)

    @@
    expression NLH, HDRLEN, TB, MAX, POL, EXT;
    @@
    -nlmsg_parse(NLH, HDRLEN, TB, MAX, POL, EXT)
    +nlmsg_parse_deprecated(NLH, HDRLEN, TB, MAX, POL, EXT)

    @@
    expression NLH, HDRLEN, TB, MAX, POL, EXT;
    @@
    -nlmsg_parse_strict(NLH, HDRLEN, TB, MAX, POL, EXT)
    +nlmsg_parse_deprecated_strict(NLH, HDRLEN, TB, MAX, POL, EXT)

    @@
    expression TB, MAX, NLA, POL, EXT;
    @@
    -nla_parse_nested(TB, MAX, NLA, POL, EXT)
    +nla_parse_nested_deprecated(TB, MAX, NLA, POL, EXT)

    @@
    expression START, MAX, POL, EXT;
    @@
    -nla_validate_nested(START, MAX, POL, EXT)
    +nla_validate_nested_deprecated(START, MAX, POL, EXT)

    @@
    expression NLH, HDRLEN, MAX, POL, EXT;
    @@
    -nlmsg_validate(NLH, HDRLEN, MAX, POL, EXT)
    +nlmsg_validate_deprecated(NLH, HDRLEN, MAX, POL, EXT)

For this patch, don't actually add the strict, non-renamed versions
yet so that it breaks compile if I get it wrong.

Also, while at it, make nla_validate and nla_parse go down to a
common __nla_validate_parse() function to avoid code duplication.

Ultimately, this allows us to have very strict validation for every
new caller of nla_parse()/nlmsg_parse() etc as re-introduced in the
next patch, while existing things will continue to work as is.

In effect then, this adds fully strict validation for any new command.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-27 17:07:21 -04:00
..
asymmetric_keys KEYS: asym_tpm: Add support for the sign operation [ver #2] 2018-10-26 09:30:47 +01:00
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: skcipher - remove remnants of internal IV generators 2018-12-23 11:52:45 +08:00
acompress.c crypto: user - clean up report structure copying 2018-11-09 17:41:39 +08:00
adiantum.c crypto: adiantum - initialize crypto_spawn::inst 2019-01-10 21:37:31 +08:00
aead.c crypto: aead - set CRYPTO_TFM_NEED_KEY if ->setkey() fails 2019-01-18 18:40:24 +08:00
aegis.h crypto: aegis - Cleanup license mess 2019-01-25 18:41:51 +08:00
aegis128.c crypto: aegis - fix handling chunked inputs 2019-02-08 15:30:08 +08:00
aegis128l.c crypto: aegis - fix handling chunked inputs 2019-02-08 15:30:08 +08:00
aegis256.c crypto: aegis - fix handling chunked inputs 2019-02-08 15:30:08 +08:00
aes_generic.c crypto: arm/aes - add some hardening against cache-timing attacks 2018-11-09 17:36:48 +08:00
aes_ti.c crypto: aes_ti - disable interrupts while accessing S-box 2018-11-09 17:36:48 +08:00
af_alg.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-03-05 09:09:55 -08:00
ahash.c crypto: ahash - fix another early termination in hash walk 2019-02-08 15:30:08 +08:00
akcipher.c crypto: user - clean up report structure copying 2018-11-09 17:41:39 +08:00
algapi.c crypto: api - add a helper to (un)register a array of templates 2019-01-25 18:41:52 +08:00
algboss.c crypto: api - Introduce notifier for new crypto algorithms 2018-09-04 11:37:04 +08:00
algif_aead.c crypto: null - Remove VLA usage of skcipher 2018-09-28 12:46:08 +08:00
algif_hash.c crypto: hash - Remove VLA usage 2018-09-04 11:35:03 +08:00
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 crypto: ansi_cprng - Convert to new rng interface 2015-04-22 09:30:18 +08:00
anubis.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
api.c evm: Don't deadlock if a crypto algorithm is unavailable 2018-07-18 07:27:22 -04:00
arc4.c crypto: export arc4 defines 2019-02-15 13:21:55 +08:00
authenc.c crypto: authenc - fix parsing key with misaligned rta_len 2019-01-10 21:37:31 +08:00
authencesn.c crypto: authencesn - Avoid twice completion call in decrypt path 2019-01-10 21:37:31 +08:00
blkcipher.c crypto: skcipher - remove remnants of internal IV generators 2018-12-23 11:52:45 +08:00
blowfish_common.c
blowfish_generic.c crypto: add missing crypto module aliases 2015-01-13 22:29:11 +11:00
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 crypto: make tables used from assembler __visible 2013-08-14 20:42:03 +10:00
cbc.c crypto: cbc - convert to skcipher_alloc_instance_simple() 2019-01-11 14:16:57 +08:00
ccm.c crypto: ccm - use template array registering API to simplify the code 2019-01-25 18:41:52 +08:00
cfb.c crypto: cfb - convert to skcipher_alloc_instance_simple() 2019-01-11 14:16:57 +08:00
chacha20poly1305.c crypto: chacha20poly1305 - use template array registering API to simplify the code 2019-01-25 18:41:52 +08:00
chacha_generic.c crypto: chacha - add XChaCha12 support 2018-11-20 14:26:55 +08:00
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 crypto: crct10dif - Add fallback for broken initrds 2013-09-12 15:31:34 +10:00
crct10dif_generic.c crypto: squash lines for simple wrapper functions 2016-09-13 20:27:26 +08:00
cryptd.c crypto: skcipher - remove remnants of internal IV generators 2018-12-23 11:52:45 +08:00
crypto_engine.c crypto: engine - Permit to enqueue all async requests 2018-02-15 23:26:50 +08:00
crypto_null.c crypto: null - convert ecb-cipher_null to skcipher API 2019-01-11 14:16:58 +08:00
crypto_user_base.c netlink: make validation more configurable for future strictness 2019-04-27 17:07:21 -04:00
crypto_user_stat.c crypto: stat - remove unused mutex 2019-01-18 18:43:43 +08:00
crypto_wq.c crypto: crypto_wq - Fix late crypto work queue initialization 2014-03-21 21:54:28 +08:00
ctr.c crypto: ctr - use template array registering API to simplify the code 2019-01-25 18:41:52 +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 crypto: clarify name of WEAK_KEY request flag 2019-01-25 18:41:52 +08:00
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 crypto: ecb - convert to skcipher API 2019-01-11 14:16:58 +08:00
ecc.c crypto: ecc - regularize scalar for scalar multiplication 2018-11-16 14:11:04 +08:00
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: null - Remove VLA usage of skcipher 2018-09-28 12:46:08 +08:00
fcrypt.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
fips.c crypto: fips - Move fips_enabled sysctl into fips.c 2015-04-23 14:18:09 +08:00
gcm.c crypto: gcm - use template array registering API to simplify the code 2019-01-25 18:41:52 +08:00
gf128mul.c crypto: gf128mul - remove incorrect comment 2017-12-22 19:52:40 +11:00
ghash-generic.c crypto: shash - remove useless setting of type flags 2018-07-09 00:30:24 +08:00
hash_info.c crypto: streebog - register Streebog in hash info for IMA 2018-11-16 14:09:40 +08:00
hmac.c crypto: hmac - require that the underlying hash algorithm is unkeyed 2017-11-29 13:39:15 +11:00
internal.h crypto: api - Introduce notifier for new crypto algorithms 2018-09-04 11:37:04 +08:00
jitterentropy-kcapi.c crypto: jitterentropy - drop duplicate header module.h 2016-11-17 23:34:52 +08:00
jitterentropy.c crypto: jitterentropy - Delete unnecessary checks before the function call "kzfree" 2015-06-25 23:18:33 +08:00
Kconfig crypto: testmgr - introduce CONFIG_CRYPTO_MANAGER_EXTRA_TESTS 2019-02-08 15:30:09 +08:00
keywrap.c crypto: keywrap - convert to skcipher API 2019-01-11 14:16:58 +08:00
khazad.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
kpp.c crypto: user - clean up report structure copying 2018-11-09 17:41:39 +08:00
lrw.c crypto: lrw - fix rebase error after out of bounds fix 2018-10-05 10:22:48 +08:00
lz4.c crypto: remove useless initializations of cra_list 2018-11-20 14:26:55 +08:00
lz4hc.c crypto: remove useless initializations of cra_list 2018-11-20 14:26:55 +08:00
lzo-rle.c lib/lzo: separate lzo-rle from lzo 2019-03-07 18:32:03 -08:00
lzo.c treewide: use kv[mz]alloc* rather than opencoded variants 2017-05-08 17:15:13 -07:00
Makefile lib/lzo: separate lzo-rle from lzo 2019-03-07 18:32:03 -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 crypto: memneq - fix for archs without efficient unaligned access 2013-12-09 20:09:12 +08:00
michael_mic.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
morus640.c crypto: morus - fix handling chunked inputs 2019-02-08 15:30:08 +08:00
morus1280.c crypto: morus - fix handling chunked inputs 2019-02-08 15:30:08 +08:00
nhpoly1305.c crypto: adiantum - adjust some comments to match latest paper 2018-12-13 18:24:59 +08:00
ofb.c crypto: ofb - convert to skcipher_alloc_instance_simple() 2019-01-11 14:16:58 +08:00
pcbc.c crypto: pcbc - convert to skcipher_alloc_instance_simple() 2019-01-11 14:16:58 +08:00
pcrypt.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-12-27 13:53:32 -08:00
poly1305_generic.c crypto: poly1305 - add Poly1305 core API 2018-11-20 14:26:56 +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: user - fix use_after_free of struct xxx_request 2018-12-07 14:15:00 +08:00
rsa-pkcs1pad.c crypto: rsa-pkcs1pad - include <crypto/internal/rsa.h> 2019-01-18 18:43:42 +08:00
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 crypto: akcipher - Changes to asymmetric key API 2015-10-14 22:23:16 +08:00
salsa20_generic.c crypto: salsa20-generic - don't unnecessarily use atomic walk 2018-12-23 11:52:44 +08:00
scatterwalk.c crypto: scatterwalk - remove 'chain' argument from scatterwalk_crypto_chain() 2018-08-03 18:06:03 +08:00
scompress.c crypto: user - clean up report structure copying 2018-11-09 17:41:39 +08:00
seed.c crypto: prefix module autoloading with "crypto-" 2014-11-24 22:43:57 +08:00
seqiv.c crypto: seqiv - Use kmemdup in seqiv_aead_encrypt() 2019-02-01 14:42:03 +08:00
serpent_generic.c crypto: serpent - improve __serpent_setkey with UBSAN 2017-08-09 20:17:54 +08:00
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: shash - remove pointless checks of shash_alg::{export,import} 2019-01-18 18:40:24 +08:00
simd.c crypto: simd - correctly take reqsize of wrapped skcipher into account 2018-11-09 17:35:43 +08:00
skcipher.c crypto: skcipher - set CRYPTO_TFM_NEED_KEY if ->setkey() fails 2019-01-18 18:40:24 +08:00
sm3_generic.c crypto: sm3 - fix undefined shift by >= width of value 2019-01-10 21:37:32 +08:00
sm4_generic.c crypto: sm4 - export encrypt/decrypt routines to other drivers 2018-05-05 14:52:51 +08:00
streebog_generic.c crypto: streebog - use correct endianness type 2019-01-18 18:43:43 +08:00
tcrypt.c lib/lzo: separate lzo-rle from lzo 2019-03-07 18:32:03 -08:00
tcrypt.h crypto: testmgr - update sm4 test vectors 2018-09-28 12:46:26 +08:00
tea.c crypto: add missing crypto module aliases 2015-01-13 22:29:11 +11:00
testmgr.c crypto: testmgr - support checking skcipher output IV 2019-02-22 12:47:27 +08:00
testmgr.h crypto: x86/poly1305 - fix overflow during partial reduction 2019-04-08 14:43:06 +08:00
tgr192.c crypto: tgr192 - fix unaligned memory access 2019-01-18 18:43:43 +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: xcbc - Remove VLA usage 2018-09-04 11:35:03 +08:00
xor.c kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK 2017-11-15 18:21:04 -08:00
xts.c crypto: xts - Drop use of auxiliary buffer 2018-09-21 13:24:50 +08:00
zstd.c crypto: zstd - Add zstd support 2018-04-21 00:58:30 +08:00