From: kernel test robot <lkp@intel.com>
To: oe-kbuild@lists.linux.dev
Cc: lkp@intel.com
Subject: [linux-next:master 2398/3406] crypto/kpp.c:138:27: warning: Value stored to 'istat' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
Date: Fri, 17 Mar 2023 03:54:25 +0800 [thread overview]
Message-ID: <202303170323.AqCy8nuC-lkp@intel.com> (raw)
::::::
:::::: Manual check reason: "low confidence static check warning: crypto/kpp.c:138:27: warning: Value stored to 'istat' during its initialization is never read [clang-analyzer-deadcode.DeadStores]"
::::::
BCC: lkp@intel.com
CC: llvm@lists.linux.dev
CC: oe-kbuild-all@lists.linux.dev
CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Herbert Xu <herbert@gondor.apana.org.au>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 6f72958a49f68553f2b6ff713e8c8e51a34c1e1e
commit: 095e590696f03ae9f458ace4ad32b6cbaea16d00 [2398/3406] crypto: kpp - Count error stats differently
:::::: branch date: 18 hours ago
:::::: commit date: 6 days ago
config: arm-randconfig-c002-20230312 (https://download.01.org/0day-ci/archive/20230317/202303170323.AqCy8nuC-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=095e590696f03ae9f458ace4ad32b6cbaea16d00
git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git fetch --no-tags linux-next master
git checkout 095e590696f03ae9f458ace4ad32b6cbaea16d00
# save the config file
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm clang-analyzer olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm clang-analyzer
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/r/202303170323.AqCy8nuC-lkp@intel.com/
clang_analyzer warnings: (new ones prefixed by >>)
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
lib/assoc_array.c:97:3: warning: Value stored to 'cursor' is never read [clang-analyzer-deadcode.DeadStores]
cursor = parent;
^ ~~~~~~
lib/assoc_array.c:97:3: note: Value stored to 'cursor' is never read
cursor = parent;
^ ~~~~~~
lib/assoc_array.c:409:3: warning: Value stored to 'cursor' is never read [clang-analyzer-deadcode.DeadStores]
cursor = parent;
^ ~~~~~~
lib/assoc_array.c:409:3: note: Value stored to 'cursor' is never read
cursor = parent;
^ ~~~~~~
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (3 in non-user code, 2 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
20 warnings generated.
crypto/ahash.c:311:26: warning: Value stored to 'alg' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct hash_alg_common *alg = crypto_hash_alg_common(tfm);
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
crypto/ahash.c:311:26: note: Value stored to 'alg' during its initialization is never read
struct hash_alg_common *alg = crypto_hash_alg_common(tfm);
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
crypto/ahash.c:323:26: warning: Value stored to 'alg' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct hash_alg_common *alg = crypto_hash_alg_common(tfm);
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
crypto/ahash.c:323:26: note: Value stored to 'alg' during its initialization is never read
struct hash_alg_common *alg = crypto_hash_alg_common(tfm);
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
19 warnings generated.
crypto/shash.c:573:28: warning: Value stored to 'istat' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct crypto_istat_hash *istat = hash_get_stat(alg);
^~~~~ ~~~~~~~~~~~~~~~~~~
crypto/shash.c:573:28: note: Value stored to 'istat' during its initialization is never read
struct crypto_istat_hash *istat = hash_get_stat(alg);
^~~~~ ~~~~~~~~~~~~~~~~~~
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
19 warnings generated.
crypto/akcipher.c:135:32: warning: Value stored to 'istat' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct crypto_istat_akcipher *istat = akcipher_get_stat(alg);
^~~~~ ~~~~~~~~~~~~~~~~~~~~~~
crypto/akcipher.c:135:32: note: Value stored to 'istat' during its initialization is never read
struct crypto_istat_akcipher *istat = akcipher_get_stat(alg);
^~~~~ ~~~~~~~~~~~~~~~~~~~~~~
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
19 warnings generated.
>> crypto/kpp.c:138:27: warning: Value stored to 'istat' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct crypto_istat_kpp *istat = kpp_get_stat(alg);
^~~~~ ~~~~~~~~~~~~~~~~~
crypto/kpp.c:138:27: note: Value stored to 'istat' during its initialization is never read
struct crypto_istat_kpp *istat = kpp_get_stat(alg);
^~~~~ ~~~~~~~~~~~~~~~~~
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
19 warnings generated.
Suppressed 19 warnings (18 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
19 warnings generated.
arch/arm/mach-omap2/omap-wakeupgen.c:99:14: warning: Although the value stored to 'irq' is used in the enclosing expression, the value is never actually read from 'irq' [clang-analyzer-deadcode.DeadStores]
*bit_posn = irq %= 32;
^ ~~
arch/arm/mach-omap2/omap-wakeupgen.c:99:14: note: Although the value stored to 'irq' is used in the enclosing expression, the value is never actually read from 'irq'
*bit_posn = irq %= 32;
^ ~~
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
18 warnings generated.
Suppressed 18 warnings (18 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
4 warnings generated.
crypto/asymmetric_keys/verify_pefile.c:113:14: warning: Although the value stored to 'secs' is used in the enclosing expression, the value is never actually read from 'secs' [clang-analyzer-deadcode.DeadStores]
ctx->secs = secs = pebuf + cursor;
^ ~~~~~~~~~~~~~~
crypto/asymmetric_keys/verify_pefile.c:113:14: note: Although the value stored to 'secs' is used in the enclosing expression, the value is never actually read from 'secs'
ctx->secs = secs = pebuf + cursor;
^ ~~~~~~~~~~~~~~
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (3 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
vim +/istat +138 crypto/kpp.c
9e2f284e149124 Hannes Reinecke 2022-06-27 135
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 136 static void kpp_prepare_alg(struct kpp_alg *alg)
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 137 {
095e590696f03a Herbert Xu 2023-02-16 @138 struct crypto_istat_kpp *istat = kpp_get_stat(alg);
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 139 struct crypto_alg *base = &alg->base;
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 140
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 141 base->cra_type = &crypto_kpp_type;
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 142 base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 143 base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
095e590696f03a Herbert Xu 2023-02-16 144
095e590696f03a Herbert Xu 2023-02-16 145 if (IS_ENABLED(CONFIG_CRYPTO_STATS))
095e590696f03a Herbert Xu 2023-02-16 146 memset(istat, 0, sizeof(*istat));
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 147 }
4e5f2c400765e3 Salvatore Benedetto 2016-06-22 148
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
reply other threads:[~2023-03-16 19:54 UTC|newest]
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