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Date: Wed, 26 Aug 2020 22:27:42 +0800
From: kernel test robot <lkp@...el.com>
To: Stephan Müller <smueller@...onox.de>,
Arnd Bergmann <arnd@...db.de>
Cc: kbuild-all@...ts.01.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-crypto@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
linux-api@...r.kernel.org,
"Eric W. Biederman" <ebiederm@...ssion.com>,
"Alexander E. Patrakov" <patrakov@...il.com>,
"Ahmed S. Darwish" <darwish.07@...il.com>,
"Theodore Y. Ts'o" <tytso@....edu>, Willy Tarreau <w@....eu>
Subject: Re: [PATCH v33 01/12] Linux Random Number Generator
Hi "Stephan,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on cryptodev/master crypto/master v5.9-rc1 next-20200821]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Stephan-M-ller/dev-random-a-new-approach-with-full-SP800-90B-compliance/20200821-140523
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git d162219c655c8cf8003128a13840d6c1e183fb80
:::::: branch date: 2 days ago
:::::: commit date: 2 days ago
config: arm64-randconfig-s031-20200821 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.2-191-g10164920-dirty
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
drivers/char/lrng/lrng_drng.c:381:6: sparse: sparse: symbol 'lrng_reset' was not declared. Should it be static?
--
>> drivers/char/lrng/lrng_chacha20.c:54:47: sparse: sparse: cast to restricted __le32
drivers/char/lrng/lrng_chacha20.c:58:47: sparse: sparse: cast to restricted __le32
--
>> drivers/char/lrng/lrng_interfaces.c:482:16: sparse: sparse: incorrect type in return expression (different base types) @@ expected unsigned int @@ got restricted __poll_t [assigned] [usertype] mask @@
>> drivers/char/lrng/lrng_interfaces.c:482:16: sparse: expected unsigned int
>> drivers/char/lrng/lrng_interfaces.c:482:16: sparse: got restricted __poll_t [assigned] [usertype] mask
>> drivers/char/lrng/lrng_interfaces.c:612:18: sparse: sparse: incorrect type in initializer (different base types) @@ expected restricted __poll_t ( *poll )( ... ) @@ got unsigned int ( * )( ... ) @@
>> drivers/char/lrng/lrng_interfaces.c:612:18: sparse: expected restricted __poll_t ( *poll )( ... )
>> drivers/char/lrng/lrng_interfaces.c:612:18: sparse: got unsigned int ( * )( ... )
# https://github.com/0day-ci/linux/commit/95481f9aadd4408e56c65cd95e47b929224fbc28
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Stephan-M-ller/dev-random-a-new-approach-with-full-SP800-90B-compliance/20200821-140523
git checkout 95481f9aadd4408e56c65cd95e47b929224fbc28
vim +/lrng_drngs_init_cc20 +81 drivers/char/lrng/lrng_drng.c
95481f9aadd440 Stephan Müller 2020-08-21 79
95481f9aadd440 Stephan Müller 2020-08-21 80 /* Initialize the default DRNG during boot */
95481f9aadd440 Stephan Müller 2020-08-21 @81 static void lrng_drngs_init_cc20(void)
95481f9aadd440 Stephan Müller 2020-08-21 82 {
95481f9aadd440 Stephan Müller 2020-08-21 83 unsigned long flags = 0;
95481f9aadd440 Stephan Müller 2020-08-21 84
95481f9aadd440 Stephan Müller 2020-08-21 85 if (lrng_get_available())
95481f9aadd440 Stephan Müller 2020-08-21 86 return;
95481f9aadd440 Stephan Müller 2020-08-21 87
95481f9aadd440 Stephan Müller 2020-08-21 88 lrng_drng_lock(&lrng_drng_init, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 89 if (lrng_get_available()) {
95481f9aadd440 Stephan Müller 2020-08-21 90 lrng_drng_unlock(&lrng_drng_init, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 91 return;
95481f9aadd440 Stephan Müller 2020-08-21 92 }
95481f9aadd440 Stephan Müller 2020-08-21 93
95481f9aadd440 Stephan Müller 2020-08-21 94 lrng_drng_reset(&lrng_drng_init);
95481f9aadd440 Stephan Müller 2020-08-21 95 lrng_cc20_init_state(&chacha20);
95481f9aadd440 Stephan Müller 2020-08-21 96 lrng_state_init_seed_work();
95481f9aadd440 Stephan Müller 2020-08-21 97 lrng_drng_unlock(&lrng_drng_init, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 98
95481f9aadd440 Stephan Müller 2020-08-21 99 lrng_drng_lock(&lrng_drng_atomic, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 100 lrng_drng_reset(&lrng_drng_atomic);
95481f9aadd440 Stephan Müller 2020-08-21 101 /*
95481f9aadd440 Stephan Müller 2020-08-21 102 * We do not initialize the state of the atomic DRNG as it is identical
95481f9aadd440 Stephan Müller 2020-08-21 103 * to the DRNG at this point.
95481f9aadd440 Stephan Müller 2020-08-21 104 */
95481f9aadd440 Stephan Müller 2020-08-21 105 lrng_drng_unlock(&lrng_drng_atomic, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 106
95481f9aadd440 Stephan Müller 2020-08-21 107 lrng_set_available();
95481f9aadd440 Stephan Müller 2020-08-21 108 }
95481f9aadd440 Stephan Müller 2020-08-21 109
95481f9aadd440 Stephan Müller 2020-08-21 110 /************************* Random Number Generation ***************************/
95481f9aadd440 Stephan Müller 2020-08-21 111
95481f9aadd440 Stephan Müller 2020-08-21 112 /* Inject a data buffer into the DRNG */
95481f9aadd440 Stephan Müller 2020-08-21 @113 static void lrng_drng_inject(struct lrng_drng *drng,
95481f9aadd440 Stephan Müller 2020-08-21 114 const u8 *inbuf, u32 inbuflen)
95481f9aadd440 Stephan Müller 2020-08-21 115 {
95481f9aadd440 Stephan Müller 2020-08-21 116 const char *drng_type = unlikely(drng == &lrng_drng_atomic) ?
95481f9aadd440 Stephan Müller 2020-08-21 117 "atomic" : "regular";
95481f9aadd440 Stephan Müller 2020-08-21 118 unsigned long flags = 0;
95481f9aadd440 Stephan Müller 2020-08-21 119
95481f9aadd440 Stephan Müller 2020-08-21 120 BUILD_BUG_ON(LRNG_DRNG_RESEED_THRESH > INT_MAX);
95481f9aadd440 Stephan Müller 2020-08-21 121 pr_debug("seeding %s DRNG with %u bytes\n", drng_type, inbuflen);
95481f9aadd440 Stephan Müller 2020-08-21 122 lrng_drng_lock(drng, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 123 if (drng->crypto_cb->lrng_drng_seed_helper(drng->drng,
95481f9aadd440 Stephan Müller 2020-08-21 124 inbuf, inbuflen) < 0) {
95481f9aadd440 Stephan Müller 2020-08-21 125 pr_warn("seeding of %s DRNG failed\n", drng_type);
95481f9aadd440 Stephan Müller 2020-08-21 126 atomic_set(&drng->requests, 1);
95481f9aadd440 Stephan Müller 2020-08-21 127 } else {
95481f9aadd440 Stephan Müller 2020-08-21 128 pr_debug("%s DRNG stats since last seeding: %lu secs; generate calls: %d\n",
95481f9aadd440 Stephan Müller 2020-08-21 129 drng_type,
95481f9aadd440 Stephan Müller 2020-08-21 130 (time_after(jiffies, drng->last_seeded) ?
95481f9aadd440 Stephan Müller 2020-08-21 131 (jiffies - drng->last_seeded) : 0) / HZ,
95481f9aadd440 Stephan Müller 2020-08-21 132 (LRNG_DRNG_RESEED_THRESH -
95481f9aadd440 Stephan Müller 2020-08-21 133 atomic_read(&drng->requests)));
95481f9aadd440 Stephan Müller 2020-08-21 134 drng->last_seeded = jiffies;
95481f9aadd440 Stephan Müller 2020-08-21 135 atomic_set(&drng->requests, LRNG_DRNG_RESEED_THRESH);
95481f9aadd440 Stephan Müller 2020-08-21 136 drng->force_reseed = false;
95481f9aadd440 Stephan Müller 2020-08-21 137
95481f9aadd440 Stephan Müller 2020-08-21 138 if (drng->drng == lrng_drng_atomic.drng) {
95481f9aadd440 Stephan Müller 2020-08-21 139 lrng_drng_atomic.last_seeded = jiffies;
95481f9aadd440 Stephan Müller 2020-08-21 140 atomic_set(&lrng_drng_atomic.requests,
95481f9aadd440 Stephan Müller 2020-08-21 141 LRNG_DRNG_RESEED_THRESH);
95481f9aadd440 Stephan Müller 2020-08-21 142 lrng_drng_atomic.force_reseed = false;
95481f9aadd440 Stephan Müller 2020-08-21 143 }
95481f9aadd440 Stephan Müller 2020-08-21 144 }
95481f9aadd440 Stephan Müller 2020-08-21 145 lrng_drng_unlock(drng, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 146 }
95481f9aadd440 Stephan Müller 2020-08-21 147
95481f9aadd440 Stephan Müller 2020-08-21 148 /*
95481f9aadd440 Stephan Müller 2020-08-21 149 * Perform the seeding of the DRNG with data from noise source
95481f9aadd440 Stephan Müller 2020-08-21 150 */
95481f9aadd440 Stephan Müller 2020-08-21 151 static inline int _lrng_drng_seed(struct lrng_drng *drng)
95481f9aadd440 Stephan Müller 2020-08-21 152 {
95481f9aadd440 Stephan Müller 2020-08-21 153 struct entropy_buf seedbuf __aligned(LRNG_KCAPI_ALIGN);
95481f9aadd440 Stephan Müller 2020-08-21 154 unsigned long flags = 0;
95481f9aadd440 Stephan Müller 2020-08-21 155 u32 total_entropy_bits;
95481f9aadd440 Stephan Müller 2020-08-21 156 int ret;
95481f9aadd440 Stephan Müller 2020-08-21 157
95481f9aadd440 Stephan Müller 2020-08-21 158 lrng_drng_lock(drng, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 159 total_entropy_bits = lrng_fill_seed_buffer(drng->crypto_cb, drng->hash,
95481f9aadd440 Stephan Müller 2020-08-21 160 &seedbuf, 0);
95481f9aadd440 Stephan Müller 2020-08-21 @161 lrng_drng_unlock(drng, &flags);
95481f9aadd440 Stephan Müller 2020-08-21 162
95481f9aadd440 Stephan Müller 2020-08-21 163 /* Allow the seeding operation to be called again */
95481f9aadd440 Stephan Müller 2020-08-21 164 lrng_pool_unlock();
95481f9aadd440 Stephan Müller 2020-08-21 165 lrng_init_ops(total_entropy_bits);
95481f9aadd440 Stephan Müller 2020-08-21 166 ret = total_entropy_bits >> 3;
95481f9aadd440 Stephan Müller 2020-08-21 167
95481f9aadd440 Stephan Müller 2020-08-21 168 lrng_drng_inject(drng, (u8 *)&seedbuf, sizeof(seedbuf));
95481f9aadd440 Stephan Müller 2020-08-21 169 memzero_explicit(&seedbuf, sizeof(seedbuf));
95481f9aadd440 Stephan Müller 2020-08-21 170
95481f9aadd440 Stephan Müller 2020-08-21 171 return ret;
95481f9aadd440 Stephan Müller 2020-08-21 172 }
95481f9aadd440 Stephan Müller 2020-08-21 173
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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