* [PATCH] crypto: tcrypt - fix return value for multiple subtests
@ 2022-09-30 21:40 Robert Elliott
2022-09-30 22:09 ` Anirudh Venkataramanan
2022-10-21 11:35 ` Herbert Xu
0 siblings, 2 replies; 5+ messages in thread
From: Robert Elliott @ 2022-09-30 21:40 UTC (permalink / raw)
To: herbert, davem, jarod, linux-crypto, linux-kernel; +Cc: Robert Elliott
When a test mode invokes multiple tests (e.g., mode 0 invokes modes
1 through 199, and mode 3 tests three block cipher modes with des),
don't keep accumulating the return values with ret += tcrypt_test(),
which results in a bogus value if more than one report a nonzero
value (e.g., two reporting -2 (-ENOENT) end up reporting -4 (-EINTR)).
Instead, keep track of the minimum return value reported by any
subtest.
Fixes: 4e033a6bc70f ("crypto: tcrypt - Do not exit on success in fips mode")
Signed-off-by: Robert Elliott <elliott@hpe.com>
---
crypto/tcrypt.c | 256 ++++++++++++++++++++++++------------------------
1 file changed, 128 insertions(+), 128 deletions(-)
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index e85f623c3c54..c0fb4427c647 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -1471,387 +1471,387 @@ static int do_test(const char *alg, u32 type, u32 mask, int m, u32 num_mb)
}
for (i = 1; i < 200; i++)
- ret += do_test(NULL, 0, 0, i, num_mb);
+ ret = min(ret, do_test(NULL, 0, 0, i, num_mb));
break;
case 1:
- ret += tcrypt_test("md5");
+ ret = min(ret, tcrypt_test("md5"));
break;
case 2:
- ret += tcrypt_test("sha1");
+ ret = min(ret, tcrypt_test("sha1"));
break;
case 3:
- ret += tcrypt_test("ecb(des)");
- ret += tcrypt_test("cbc(des)");
- ret += tcrypt_test("ctr(des)");
+ ret = min(ret, tcrypt_test("ecb(des)"));
+ ret = min(ret, tcrypt_test("cbc(des)"));
+ ret = min(ret, tcrypt_test("ctr(des)"));
break;
case 4:
- ret += tcrypt_test("ecb(des3_ede)");
- ret += tcrypt_test("cbc(des3_ede)");
- ret += tcrypt_test("ctr(des3_ede)");
+ ret = min(ret, tcrypt_test("ecb(des3_ede)"));
+ ret = min(ret, tcrypt_test("cbc(des3_ede)"));
+ ret = min(ret, tcrypt_test("ctr(des3_ede)"));
break;
case 5:
- ret += tcrypt_test("md4");
+ ret = min(ret, tcrypt_test("md4"));
break;
case 6:
- ret += tcrypt_test("sha256");
+ ret = min(ret, tcrypt_test("sha256"));
break;
case 7:
- ret += tcrypt_test("ecb(blowfish)");
- ret += tcrypt_test("cbc(blowfish)");
- ret += tcrypt_test("ctr(blowfish)");
+ ret = min(ret, tcrypt_test("ecb(blowfish)"));
+ ret = min(ret, tcrypt_test("cbc(blowfish)"));
+ ret = min(ret, tcrypt_test("ctr(blowfish)"));
break;
case 8:
- ret += tcrypt_test("ecb(twofish)");
- ret += tcrypt_test("cbc(twofish)");
- ret += tcrypt_test("ctr(twofish)");
- ret += tcrypt_test("lrw(twofish)");
- ret += tcrypt_test("xts(twofish)");
+ ret = min(ret, tcrypt_test("ecb(twofish)"));
+ ret = min(ret, tcrypt_test("cbc(twofish)"));
+ ret = min(ret, tcrypt_test("ctr(twofish)"));
+ ret = min(ret, tcrypt_test("lrw(twofish)"));
+ ret = min(ret, tcrypt_test("xts(twofish)"));
break;
case 9:
- ret += tcrypt_test("ecb(serpent)");
- ret += tcrypt_test("cbc(serpent)");
- ret += tcrypt_test("ctr(serpent)");
- ret += tcrypt_test("lrw(serpent)");
- ret += tcrypt_test("xts(serpent)");
+ ret = min(ret, tcrypt_test("ecb(serpent)"));
+ ret = min(ret, tcrypt_test("cbc(serpent)"));
+ ret = min(ret, tcrypt_test("ctr(serpent)"));
+ ret = min(ret, tcrypt_test("lrw(serpent)"));
+ ret = min(ret, tcrypt_test("xts(serpent)"));
break;
case 10:
- ret += tcrypt_test("ecb(aes)");
- ret += tcrypt_test("cbc(aes)");
- ret += tcrypt_test("lrw(aes)");
- ret += tcrypt_test("xts(aes)");
- ret += tcrypt_test("ctr(aes)");
- ret += tcrypt_test("rfc3686(ctr(aes))");
- ret += tcrypt_test("ofb(aes)");
- ret += tcrypt_test("cfb(aes)");
- ret += tcrypt_test("xctr(aes)");
+ ret = min(ret, tcrypt_test("ecb(aes)"));
+ ret = min(ret, tcrypt_test("cbc(aes)"));
+ ret = min(ret, tcrypt_test("lrw(aes)"));
+ ret = min(ret, tcrypt_test("xts(aes)"));
+ ret = min(ret, tcrypt_test("ctr(aes)"));
+ ret = min(ret, tcrypt_test("rfc3686(ctr(aes))"));
+ ret = min(ret, tcrypt_test("ofb(aes)"));
+ ret = min(ret, tcrypt_test("cfb(aes)"));
+ ret = min(ret, tcrypt_test("xctr(aes)"));
break;
case 11:
- ret += tcrypt_test("sha384");
+ ret = min(ret, tcrypt_test("sha384"));
break;
case 12:
- ret += tcrypt_test("sha512");
+ ret = min(ret, tcrypt_test("sha512"));
break;
case 13:
- ret += tcrypt_test("deflate");
+ ret = min(ret, tcrypt_test("deflate"));
break;
case 14:
- ret += tcrypt_test("ecb(cast5)");
- ret += tcrypt_test("cbc(cast5)");
- ret += tcrypt_test("ctr(cast5)");
+ ret = min(ret, tcrypt_test("ecb(cast5)"));
+ ret = min(ret, tcrypt_test("cbc(cast5)"));
+ ret = min(ret, tcrypt_test("ctr(cast5)"));
break;
case 15:
- ret += tcrypt_test("ecb(cast6)");
- ret += tcrypt_test("cbc(cast6)");
- ret += tcrypt_test("ctr(cast6)");
- ret += tcrypt_test("lrw(cast6)");
- ret += tcrypt_test("xts(cast6)");
+ ret = min(ret, tcrypt_test("ecb(cast6)"));
+ ret = min(ret, tcrypt_test("cbc(cast6)"));
+ ret = min(ret, tcrypt_test("ctr(cast6)"));
+ ret = min(ret, tcrypt_test("lrw(cast6)"));
+ ret = min(ret, tcrypt_test("xts(cast6)"));
break;
case 16:
- ret += tcrypt_test("ecb(arc4)");
+ ret = min(ret, tcrypt_test("ecb(arc4)"));
break;
case 17:
- ret += tcrypt_test("michael_mic");
+ ret = min(ret, tcrypt_test("michael_mic"));
break;
case 18:
- ret += tcrypt_test("crc32c");
+ ret = min(ret, tcrypt_test("crc32c"));
break;
case 19:
- ret += tcrypt_test("ecb(tea)");
+ ret = min(ret, tcrypt_test("ecb(tea)"));
break;
case 20:
- ret += tcrypt_test("ecb(xtea)");
+ ret = min(ret, tcrypt_test("ecb(xtea)"));
break;
case 21:
- ret += tcrypt_test("ecb(khazad)");
+ ret = min(ret, tcrypt_test("ecb(khazad)"));
break;
case 22:
- ret += tcrypt_test("wp512");
+ ret = min(ret, tcrypt_test("wp512"));
break;
case 23:
- ret += tcrypt_test("wp384");
+ ret = min(ret, tcrypt_test("wp384"));
break;
case 24:
- ret += tcrypt_test("wp256");
+ ret = min(ret, tcrypt_test("wp256"));
break;
case 26:
- ret += tcrypt_test("ecb(anubis)");
- ret += tcrypt_test("cbc(anubis)");
+ ret = min(ret, tcrypt_test("ecb(anubis)"));
+ ret = min(ret, tcrypt_test("cbc(anubis)"));
break;
case 30:
- ret += tcrypt_test("ecb(xeta)");
+ ret = min(ret, tcrypt_test("ecb(xeta)"));
break;
case 31:
- ret += tcrypt_test("pcbc(fcrypt)");
+ ret = min(ret, tcrypt_test("pcbc(fcrypt)"));
break;
case 32:
- ret += tcrypt_test("ecb(camellia)");
- ret += tcrypt_test("cbc(camellia)");
- ret += tcrypt_test("ctr(camellia)");
- ret += tcrypt_test("lrw(camellia)");
- ret += tcrypt_test("xts(camellia)");
+ ret = min(ret, tcrypt_test("ecb(camellia)"));
+ ret = min(ret, tcrypt_test("cbc(camellia)"));
+ ret = min(ret, tcrypt_test("ctr(camellia)"));
+ ret = min(ret, tcrypt_test("lrw(camellia)"));
+ ret = min(ret, tcrypt_test("xts(camellia)"));
break;
case 33:
- ret += tcrypt_test("sha224");
+ ret = min(ret, tcrypt_test("sha224"));
break;
case 35:
- ret += tcrypt_test("gcm(aes)");
+ ret = min(ret, tcrypt_test("gcm(aes)"));
break;
case 36:
- ret += tcrypt_test("lzo");
+ ret = min(ret, tcrypt_test("lzo"));
break;
case 37:
- ret += tcrypt_test("ccm(aes)");
+ ret = min(ret, tcrypt_test("ccm(aes)"));
break;
case 38:
- ret += tcrypt_test("cts(cbc(aes))");
+ ret = min(ret, tcrypt_test("cts(cbc(aes))"));
break;
case 39:
- ret += tcrypt_test("xxhash64");
+ ret = min(ret, tcrypt_test("xxhash64"));
break;
case 40:
- ret += tcrypt_test("rmd160");
+ ret = min(ret, tcrypt_test("rmd160"));
break;
case 42:
- ret += tcrypt_test("blake2b-512");
+ ret = min(ret, tcrypt_test("blake2b-512"));
break;
case 43:
- ret += tcrypt_test("ecb(seed)");
+ ret = min(ret, tcrypt_test("ecb(seed)"));
break;
case 45:
- ret += tcrypt_test("rfc4309(ccm(aes))");
+ ret = min(ret, tcrypt_test("rfc4309(ccm(aes))"));
break;
case 46:
- ret += tcrypt_test("ghash");
+ ret = min(ret, tcrypt_test("ghash"));
break;
case 47:
- ret += tcrypt_test("crct10dif");
+ ret = min(ret, tcrypt_test("crct10dif"));
break;
case 48:
- ret += tcrypt_test("sha3-224");
+ ret = min(ret, tcrypt_test("sha3-224"));
break;
case 49:
- ret += tcrypt_test("sha3-256");
+ ret = min(ret, tcrypt_test("sha3-256"));
break;
case 50:
- ret += tcrypt_test("sha3-384");
+ ret = min(ret, tcrypt_test("sha3-384"));
break;
case 51:
- ret += tcrypt_test("sha3-512");
+ ret = min(ret, tcrypt_test("sha3-512"));
break;
case 52:
- ret += tcrypt_test("sm3");
+ ret = min(ret, tcrypt_test("sm3"));
break;
case 53:
- ret += tcrypt_test("streebog256");
+ ret = min(ret, tcrypt_test("streebog256"));
break;
case 54:
- ret += tcrypt_test("streebog512");
+ ret = min(ret, tcrypt_test("streebog512"));
break;
case 55:
- ret += tcrypt_test("gcm(sm4)");
+ ret = min(ret, tcrypt_test("gcm(sm4)"));
break;
case 56:
- ret += tcrypt_test("ccm(sm4)");
+ ret = min(ret, tcrypt_test("ccm(sm4)"));
break;
case 57:
- ret += tcrypt_test("polyval");
+ ret = min(ret, tcrypt_test("polyval"));
break;
case 58:
- ret += tcrypt_test("gcm(aria)");
+ ret = min(ret, tcrypt_test("gcm(aria)"));
break;
case 100:
- ret += tcrypt_test("hmac(md5)");
+ ret = min(ret, tcrypt_test("hmac(md5)"));
break;
case 101:
- ret += tcrypt_test("hmac(sha1)");
+ ret = min(ret, tcrypt_test("hmac(sha1)"));
break;
case 102:
- ret += tcrypt_test("hmac(sha256)");
+ ret = min(ret, tcrypt_test("hmac(sha256)"));
break;
case 103:
- ret += tcrypt_test("hmac(sha384)");
+ ret = min(ret, tcrypt_test("hmac(sha384)"));
break;
case 104:
- ret += tcrypt_test("hmac(sha512)");
+ ret = min(ret, tcrypt_test("hmac(sha512)"));
break;
case 105:
- ret += tcrypt_test("hmac(sha224)");
+ ret = min(ret, tcrypt_test("hmac(sha224)"));
break;
case 106:
- ret += tcrypt_test("xcbc(aes)");
+ ret = min(ret, tcrypt_test("xcbc(aes)"));
break;
case 108:
- ret += tcrypt_test("hmac(rmd160)");
+ ret = min(ret, tcrypt_test("hmac(rmd160)"));
break;
case 109:
- ret += tcrypt_test("vmac64(aes)");
+ ret = min(ret, tcrypt_test("vmac64(aes)"));
break;
case 111:
- ret += tcrypt_test("hmac(sha3-224)");
+ ret = min(ret, tcrypt_test("hmac(sha3-224)"));
break;
case 112:
- ret += tcrypt_test("hmac(sha3-256)");
+ ret = min(ret, tcrypt_test("hmac(sha3-256)"));
break;
case 113:
- ret += tcrypt_test("hmac(sha3-384)");
+ ret = min(ret, tcrypt_test("hmac(sha3-384)"));
break;
case 114:
- ret += tcrypt_test("hmac(sha3-512)");
+ ret = min(ret, tcrypt_test("hmac(sha3-512)"));
break;
case 115:
- ret += tcrypt_test("hmac(streebog256)");
+ ret = min(ret, tcrypt_test("hmac(streebog256)"));
break;
case 116:
- ret += tcrypt_test("hmac(streebog512)");
+ ret = min(ret, tcrypt_test("hmac(streebog512)"));
break;
case 150:
- ret += tcrypt_test("ansi_cprng");
+ ret = min(ret, tcrypt_test("ansi_cprng"));
break;
case 151:
- ret += tcrypt_test("rfc4106(gcm(aes))");
+ ret = min(ret, tcrypt_test("rfc4106(gcm(aes))"));
break;
case 152:
- ret += tcrypt_test("rfc4543(gcm(aes))");
+ ret = min(ret, tcrypt_test("rfc4543(gcm(aes))"));
break;
case 153:
- ret += tcrypt_test("cmac(aes)");
+ ret = min(ret, tcrypt_test("cmac(aes)"));
break;
case 154:
- ret += tcrypt_test("cmac(des3_ede)");
+ ret = min(ret, tcrypt_test("cmac(des3_ede)"));
break;
case 155:
- ret += tcrypt_test("authenc(hmac(sha1),cbc(aes))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha1),cbc(aes))"));
break;
case 156:
- ret += tcrypt_test("authenc(hmac(md5),ecb(cipher_null))");
+ ret = min(ret, tcrypt_test("authenc(hmac(md5),ecb(cipher_null))"));
break;
case 157:
- ret += tcrypt_test("authenc(hmac(sha1),ecb(cipher_null))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha1),ecb(cipher_null))"));
break;
case 158:
- ret += tcrypt_test("cbcmac(sm4)");
+ ret = min(ret, tcrypt_test("cbcmac(sm4)"));
break;
case 159:
- ret += tcrypt_test("cmac(sm4)");
+ ret = min(ret, tcrypt_test("cmac(sm4)"));
break;
case 181:
- ret += tcrypt_test("authenc(hmac(sha1),cbc(des))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha1),cbc(des))"));
break;
case 182:
- ret += tcrypt_test("authenc(hmac(sha1),cbc(des3_ede))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha1),cbc(des3_ede))"));
break;
case 183:
- ret += tcrypt_test("authenc(hmac(sha224),cbc(des))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha224),cbc(des))"));
break;
case 184:
- ret += tcrypt_test("authenc(hmac(sha224),cbc(des3_ede))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha224),cbc(des3_ede))"));
break;
case 185:
- ret += tcrypt_test("authenc(hmac(sha256),cbc(des))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha256),cbc(des))"));
break;
case 186:
- ret += tcrypt_test("authenc(hmac(sha256),cbc(des3_ede))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha256),cbc(des3_ede))"));
break;
case 187:
- ret += tcrypt_test("authenc(hmac(sha384),cbc(des))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha384),cbc(des))"));
break;
case 188:
- ret += tcrypt_test("authenc(hmac(sha384),cbc(des3_ede))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha384),cbc(des3_ede))"));
break;
case 189:
- ret += tcrypt_test("authenc(hmac(sha512),cbc(des))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha512),cbc(des))"));
break;
case 190:
- ret += tcrypt_test("authenc(hmac(sha512),cbc(des3_ede))");
+ ret = min(ret, tcrypt_test("authenc(hmac(sha512),cbc(des3_ede))"));
break;
case 191:
- ret += tcrypt_test("ecb(sm4)");
- ret += tcrypt_test("cbc(sm4)");
- ret += tcrypt_test("cfb(sm4)");
- ret += tcrypt_test("ctr(sm4)");
+ ret = min(ret, tcrypt_test("ecb(sm4)"));
+ ret = min(ret, tcrypt_test("cbc(sm4)"));
+ ret = min(ret, tcrypt_test("cfb(sm4)"));
+ ret = min(ret, tcrypt_test("ctr(sm4)"));
break;
case 192:
- ret += tcrypt_test("ecb(aria)");
- ret += tcrypt_test("cbc(aria)");
- ret += tcrypt_test("cfb(aria)");
- ret += tcrypt_test("ctr(aria)");
+ ret = min(ret, tcrypt_test("ecb(aria)"));
+ ret = min(ret, tcrypt_test("cbc(aria)"));
+ ret = min(ret, tcrypt_test("cfb(aria)"));
+ ret = min(ret, tcrypt_test("ctr(aria)"));
break;
case 200:
test_cipher_speed("ecb(aes)", ENCRYPT, sec, NULL, 0,
--
2.37.2
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH] crypto: tcrypt - fix return value for multiple subtests
2022-09-30 21:40 [PATCH] crypto: tcrypt - fix return value for multiple subtests Robert Elliott
@ 2022-09-30 22:09 ` Anirudh Venkataramanan
2022-09-30 22:42 ` Elliott, Robert (Servers)
2022-10-21 11:35 ` Herbert Xu
1 sibling, 1 reply; 5+ messages in thread
From: Anirudh Venkataramanan @ 2022-09-30 22:09 UTC (permalink / raw)
To: Robert Elliott, herbert, davem, jarod, linux-crypto, linux-kernel
On 9/30/2022 2:40 PM, Robert Elliott wrote:
> When a test mode invokes multiple tests (e.g., mode 0 invokes modes
> 1 through 199, and mode 3 tests three block cipher modes with des),
> don't keep accumulating the return values with ret += tcrypt_test(),
> which results in a bogus value if more than one report a nonzero
> value (e.g., two reporting -2 (-ENOENT) end up reporting -4 (-EINTR)).
> Instead, keep track of the minimum return value reported by any
> subtest.
I am assuming this is for the case when fips_enabled is true?
I agree that returning the cumulative sum or errors isn't particularly
useful, but how is returning the minimum error value useful? Wouldn't it
be more useful to return the first error return?
Ani
^ permalink raw reply [flat|nested] 5+ messages in thread
* RE: [PATCH] crypto: tcrypt - fix return value for multiple subtests
2022-09-30 22:09 ` Anirudh Venkataramanan
@ 2022-09-30 22:42 ` Elliott, Robert (Servers)
2022-09-30 23:30 ` Anirudh Venkataramanan
0 siblings, 1 reply; 5+ messages in thread
From: Elliott, Robert (Servers) @ 2022-09-30 22:42 UTC (permalink / raw)
To: Anirudh Venkataramanan, herbert, davem, jarod, linux-crypto,
linux-kernel
> -----Original Message-----
> From: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
> Sent: Friday, September 30, 2022 5:10 PM
> To: Elliott, Robert (Servers) <elliott@hpe.com>; herbert@gondor.apana.org.au;
> davem@davemloft.net; jarod@redhat.com; linux-crypto@vger.kernel.org; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH] crypto: tcrypt - fix return value for multiple subtests
>
> On 9/30/2022 2:40 PM, Robert Elliott wrote:
> > When a test mode invokes multiple tests (e.g., mode 0 invokes modes
> > 1 through 199, and mode 3 tests three block cipher modes with des),
> > don't keep accumulating the return values with ret += tcrypt_test(),
> > which results in a bogus value if more than one report a nonzero
> > value (e.g., two reporting -2 (-ENOENT) end up reporting -4 (-EINTR)).
> > Instead, keep track of the minimum return value reported by any
> > subtest.
>
> I am assuming this is for the case when fips_enabled is true?
I have some other unposted patches that print more info on the
test progress including the return values at various levels.
The Fedora 36 .config on x86 yields 23 -2 (ENOENT) errors, so
the overall result is -46 (which is defined as EPFNOSUPPORT).
> I agree that returning the cumulative sum or errors isn't particularly
> useful, but how is returning the minimum error value useful? Wouldn't it
> be more useful to return the first error return?
The first error would be more useful, but would require more complex
changes. Is there any kernel macro that would handle this in one line?
tmp = tcrypt_test();
if (tmp && !ret)
ret = tmp;
Since do_test() and tcrypt_test() are static inline functions
only used within this file, a new argument containing a pointer
to the return value could be added that lets them handle
updating it while keeping the callers simple.
ret += tcrypt_test("md5");
could become
tcrypt_test("md5", &ret);
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] crypto: tcrypt - fix return value for multiple subtests
2022-09-30 22:42 ` Elliott, Robert (Servers)
@ 2022-09-30 23:30 ` Anirudh Venkataramanan
0 siblings, 0 replies; 5+ messages in thread
From: Anirudh Venkataramanan @ 2022-09-30 23:30 UTC (permalink / raw)
To: Elliott, Robert (Servers),
herbert, davem, jarod, linux-crypto, linux-kernel
On 9/30/2022 3:42 PM, Elliott, Robert (Servers) wrote:
>
>
>> -----Original Message-----
>> From: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
>> Sent: Friday, September 30, 2022 5:10 PM
>> To: Elliott, Robert (Servers) <elliott@hpe.com>; herbert@gondor.apana.org.au;
>> davem@davemloft.net; jarod@redhat.com; linux-crypto@vger.kernel.org; linux-
>> kernel@vger.kernel.org
>> Subject: Re: [PATCH] crypto: tcrypt - fix return value for multiple subtests
>>
>> On 9/30/2022 2:40 PM, Robert Elliott wrote:
>>> When a test mode invokes multiple tests (e.g., mode 0 invokes modes
>>> 1 through 199, and mode 3 tests three block cipher modes with des),
>>> don't keep accumulating the return values with ret += tcrypt_test(),
>>> which results in a bogus value if more than one report a nonzero
>>> value (e.g., two reporting -2 (-ENOENT) end up reporting -4 (-EINTR)).
>>> Instead, keep track of the minimum return value reported by any
>>> subtest.
>>
>> I am assuming this is for the case when fips_enabled is true?
>
> I have some other unposted patches that print more info on the
> test progress including the return values at various levels.
To what end? What is the problem you're trying to solve?
> The Fedora 36 .config on x86 yields 23 -2 (ENOENT) errors, so
> the overall result is -46 (which is defined as EPFNOSUPPORT).
yeah, but the return value to userspace would always be -EAGAIN (-11)
unless fips_enabled is true.
>
>> I agree that returning the cumulative sum or errors isn't particularly
>> useful, but how is returning the minimum error value useful? Wouldn't it
>> be more useful to return the first error return?
>
> The first error would be more useful, but would require more complex
> changes. Is there any kernel macro that would handle this in one line?
Actually, thinking about this some more, the first error isn't
particularly useful either, because to find out what failed you have to
do more digging anyway. Userspace just gets a 0/negative return value,
and the negative value doesn't mean anything other than "there was an
error", and that too only if fips_enabled is true.
>
> tmp = tcrypt_test();
> if (tmp && !ret)
> ret = tmp;
>
> Since do_test() and tcrypt_test() are static inline functions
> only used within this file, a new argument containing a pointer
> to the return value could be added that lets them handle
> updating it while keeping the callers simple.
>
> ret += tcrypt_test("md5");
> could become
> tcrypt_test("md5", &ret);
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] crypto: tcrypt - fix return value for multiple subtests
2022-09-30 21:40 [PATCH] crypto: tcrypt - fix return value for multiple subtests Robert Elliott
2022-09-30 22:09 ` Anirudh Venkataramanan
@ 2022-10-21 11:35 ` Herbert Xu
1 sibling, 0 replies; 5+ messages in thread
From: Herbert Xu @ 2022-10-21 11:35 UTC (permalink / raw)
To: Robert Elliott; +Cc: davem, jarod, linux-crypto, linux-kernel
On Fri, Sep 30, 2022 at 04:40:14PM -0500, Robert Elliott wrote:
> When a test mode invokes multiple tests (e.g., mode 0 invokes modes
> 1 through 199, and mode 3 tests three block cipher modes with des),
> don't keep accumulating the return values with ret += tcrypt_test(),
> which results in a bogus value if more than one report a nonzero
> value (e.g., two reporting -2 (-ENOENT) end up reporting -4 (-EINTR)).
> Instead, keep track of the minimum return value reported by any
> subtest.
>
> Fixes: 4e033a6bc70f ("crypto: tcrypt - Do not exit on success in fips mode")
> Signed-off-by: Robert Elliott <elliott@hpe.com>
> ---
> crypto/tcrypt.c | 256 ++++++++++++++++++++++++------------------------
> 1 file changed, 128 insertions(+), 128 deletions(-)
Patch applied. Thanks.
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-10-21 11:36 UTC | newest]
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2022-09-30 21:40 [PATCH] crypto: tcrypt - fix return value for multiple subtests Robert Elliott
2022-09-30 22:09 ` Anirudh Venkataramanan
2022-09-30 22:42 ` Elliott, Robert (Servers)
2022-09-30 23:30 ` Anirudh Venkataramanan
2022-10-21 11:35 ` Herbert Xu
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