crypto/testmgr.c:297:8: warning: Excessive padding in 'struct testvec_config' (5 padding bytes, where 1 is optimal). Optimal fields order: name, inplace_mode, req_flags, iv_offset, key_offset, finalization_type, src_divs, dst_divs, iv_offset_relative_to_a...

From: kernel test robot
Date: Sun Jul 03 2022 - 04:31:47 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 69cb6c6556ad89620547318439d6be8bb1629a5a
commit: f17f9e9069f20f4400ae0bb3ee830d34104ff8f7 crypto: testmgr - test in-place en/decryption with two sglists
date: 3 months ago
config: arm-randconfig-c002-20220629 (https://download.01.org/0day-ci/archive/20220703/202207031600.5xQNJyk8-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a9119143a2d1f4d0d0bc1fe0d819e5351b4e0deb)
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/torvalds/linux.git/commit/?id=f17f9e9069f20f4400ae0bb3ee830d34104ff8f7
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout f17f9e9069f20f4400ae0bb3ee830d34104ff8f7
# save the config file
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@xxxxxxxxx>

clang-analyzer warnings: (new ones prefixed by >>)
^ ~~~
Suppressed 41 warnings (41 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.
45 warnings generated.
drivers/gpu/drm/drm_file.c:587:30: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
file_priv->event_space += e->event->length;
^~~~~~~~
drivers/gpu/drm/drm_file.c:577:6: note: Assuming 'ret' is 0
if (ret)
^~~
drivers/gpu/drm/drm_file.c:577:2: note: Taking false branch
if (ret)
^
drivers/gpu/drm/drm_file.c:580:2: note: Loop condition is true. Entering loop body
for (;;) {
^
drivers/gpu/drm/drm_file.c:584:7: note: Assuming the condition is true
if (!list_empty(&file_priv->event_list)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/drm_file.c:584:3: note: Taking true branch
if (!list_empty(&file_priv->event_list)) {
^
drivers/gpu/drm/drm_file.c:592:7: note: 'e' is not equal to NULL
if (e == NULL) {
^
drivers/gpu/drm/drm_file.c:592:3: note: Taking false branch
if (e == NULL) {
^
drivers/gpu/drm/drm_file.c:611:8: note: Assuming the condition is false
if (length > count - ret) {
^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/drm_file.c:611:4: note: Taking false branch
if (length > count - ret) {
^
drivers/gpu/drm/drm_file.c:622:8: note: Assuming the condition is false
if (copy_to_user(buffer + ret, e->event, length)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/drm_file.c:622:4: note: Taking false branch
if (copy_to_user(buffer + ret, e->event, length)) {
^
drivers/gpu/drm/drm_file.c:629:4: note: Memory is released
kfree(e);
^~~~~~~~
drivers/gpu/drm/drm_file.c:580:2: note: Loop condition is true. Entering loop body
for (;;) {
^
drivers/gpu/drm/drm_file.c:584:7: note: Assuming the condition is true
if (!list_empty(&file_priv->event_list)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/drm_file.c:584:3: note: Taking true branch
if (!list_empty(&file_priv->event_list)) {
^
drivers/gpu/drm/drm_file.c:587:30: note: Use of memory after it is freed
file_priv->event_space += e->event->length;
^~~~~~~~
Suppressed 44 warnings (44 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.
45 warnings generated.
Suppressed 45 warnings (45 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.
59 warnings generated.
Suppressed 59 warnings (59 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.
59 warnings generated.
Suppressed 59 warnings (59 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.
64 warnings generated.
crypto/algboss.c:96:2: warning: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling]
memcpy(param->template, name, len);
^~~~~~
crypto/algboss.c:96:2: note: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11
memcpy(param->template, name, len);
^~~~~~
crypto/algboss.c:126:3: warning: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling]
memcpy(param->attrs[i].data.name, name, len);
^~~~~~
crypto/algboss.c:126:3: note: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11
memcpy(param->attrs[i].data.name, name, len);
^~~~~~
crypto/algboss.c:209:2: warning: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling]
memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver));
^~~~~~
crypto/algboss.c:209:2: note: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11
memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver));
^~~~~~
crypto/algboss.c:210:2: warning: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling]
memcpy(param->alg, alg->cra_name, sizeof(param->alg));
^~~~~~
crypto/algboss.c:210:2: note: Call to function 'memcpy' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memcpy_s' in case of C11
memcpy(param->alg, alg->cra_name, sizeof(param->alg));
^~~~~~
Suppressed 60 warnings (60 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.
78 warnings generated.
crypto/testmgr.c:207:2: warning: Call to function 'memset' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memset_s' in case of C11 [clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling]
memset(addr, TESTMGR_POISON_BYTE, len);
^~~~~~
crypto/testmgr.c:207:2: note: Call to function 'memset' is insecure as it does not provide security checks introduced in the C11 standard. Replace with analogous functions that support length arguments or provides boundary checks such as 'memset_s' in case of C11
memset(addr, TESTMGR_POISON_BYTE, len);
^~~~~~
>> crypto/testmgr.c:297:8: warning: Excessive padding in 'struct testvec_config' (5 padding bytes, where 1 is optimal). Optimal fields order: name, inplace_mode, req_flags, iv_offset, key_offset, finalization_type, src_divs, dst_divs, iv_offset_relative_to_alignmask, key_offset_relative_to_alignmask, nosimd, consider reordering the fields or adding explicit padding members [clang-analyzer-optin.performance.Padding]
struct testvec_config {
~~~~~~~^~~~~~~~~~~~~~~~
crypto/testmgr.c:297:8: note: Excessive padding in 'struct testvec_config' (5 padding bytes, where 1 is optimal). Optimal fields order: name, inplace_mode, req_flags, iv_offset, key_offset, finalization_type, src_divs, dst_divs, iv_offset_relative_to_alignmask, key_offset_relative_to_alignmask, nosimd, consider reordering the fields or adding explicit padding members
struct testvec_config {
~~~~~~~^~~~~~~~~~~~~~~~
crypto/testmgr.c:617:25: warning: Access to field 'offset' results in a dereference of an undefined pointer value (loaded from field 'div') [clang-analyzer-core.NullDereference]
unsigned int offset = partitions[i].div->offset;
^
crypto/testmgr.c:2748:19: note: Assuming 'enc' is 0
const char *op = enc ? "encryption" : "decryption";
^~~
crypto/testmgr.c:2748:19: note: '?' condition is false
crypto/testmgr.c:2753:5: note: Assuming field 'iv_offset_relative_to_alignmask' is false
(cfg->iv_offset_relative_to_alignmask ? alignmask : 0);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
crypto/testmgr.c:2753:5: note: '?' condition is false
crypto/testmgr.c:2758:6: note: Assuming field 'wk' is 0
if (vec->wk)
^~~~~~~
crypto/testmgr.c:2758:2: note: Taking false branch
if (vec->wk)
^
crypto/testmgr.c:2763:8: note: 'err' is equal to 0
err = do_setkey(crypto_skcipher_setkey, tfm, vec->key, vec->klen,
^
crypto/testmgr.c:846:6: note: expanded from macro 'do_setkey'
if (err == 0) { \
^~~
crypto/testmgr.c:2763:8: note: Taking true branch
err = do_setkey(crypto_skcipher_setkey, tfm, vec->key, vec->klen,
^
crypto/testmgr.c:846:2: note: expanded from macro 'do_setkey'
if (err == 0) { \
^
crypto/testmgr.c:2765:6: note: Assuming 'err' is 0
if (err) {
^~~
crypto/testmgr.c:2765:2: note: Taking false branch
if (err) {
^
crypto/testmgr.c:2773:6: note: Assuming field 'setkey_error' is 0
if (vec->setkey_error) {
^~~~~~~~~~~~~~~~~
crypto/testmgr.c:2773:2: note: Taking false branch
if (vec->setkey_error) {
^
crypto/testmgr.c:2780:6: note: Assuming 'ivsize' is not equal to 0
if (ivsize) {
^~~~~~
crypto/testmgr.c:2780:2: note: Taking true branch
if (ivsize) {
^
crypto/testmgr.c:2781:15: note: Assuming 'ivsize' is <= 32
if (WARN_ON(ivsize > MAX_IVLEN))
^
include/asm-generic/bug.h:121:25: note: expanded from macro 'WARN_ON'
int __ret_warn_on = !!(condition); \
^~~~~~~~~
crypto/testmgr.c:2781:7: note: Taking false branch
if (WARN_ON(ivsize > MAX_IVLEN))
^
include/asm-generic/bug.h:122:2: note: expanded from macro 'WARN_ON'
if (unlikely(__ret_warn_on)) \
^
crypto/testmgr.c:2781:3: note: Taking false branch
if (WARN_ON(ivsize > MAX_IVLEN))
^
crypto/testmgr.c:2783:7: note: Assuming field 'generates_iv' is true
if (vec->generates_iv && !enc)
^~~~~~~~~~~~~~~~~
crypto/testmgr.c:2783:7: note: Left side of '&&' is true
crypto/testmgr.c:2783:29: note: 'enc' is 0
if (vec->generates_iv && !enc)
^~~
crypto/testmgr.c:2783:3: note: Taking true branch
if (vec->generates_iv && !enc)
^
crypto/testmgr.c:2799:19: note: 'enc' is 0
input.iov_base = enc ? (void *)vec->ptext : (void *)vec->ctext;
^~~
crypto/testmgr.c:2799:19: note: '?' condition is false
crypto/testmgr.c:2801:8: note: Calling 'build_cipher_test_sglists'
err = build_cipher_test_sglists(tsgls, cfg, alignmask,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
crypto/testmgr.c:771:5: note: Assuming field 'inplace_mode' is not equal to OUT_OF_PLACE
cfg->inplace_mode != OUT_OF_PLACE ?
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
crypto/testmgr.c:771:5: note: '?' condition is true
crypto/testmgr.c:772:6: note: '__UNIQUE_ID___x215' is <= '__UNIQUE_ID___y216'
max(dst_total_len, src_total_len) :
^
include/linux/minmax.h:52:19: note: expanded from macro 'max'
#define max(x, y) __careful_cmp(x, y, >)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:38:3: note: expanded from macro '__careful_cmp'
__cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:33:3: note: expanded from macro '__cmp_once'
__cmp(unique_x, unique_y, op); })
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +297 crypto/testmgr.c

3f47a03df6e811 Eric Biggers 2019-01-31 274
3f47a03df6e811 Eric Biggers 2019-01-31 275 /**
3f47a03df6e811 Eric Biggers 2019-01-31 276 * struct testvec_config - configuration for testing a crypto test vector
3f47a03df6e811 Eric Biggers 2019-01-31 277 *
3f47a03df6e811 Eric Biggers 2019-01-31 278 * This struct describes the data layout and other parameters with which each
3f47a03df6e811 Eric Biggers 2019-01-31 279 * crypto test vector can be tested.
3f47a03df6e811 Eric Biggers 2019-01-31 280 *
3f47a03df6e811 Eric Biggers 2019-01-31 281 * @name: name of this config, logged for debugging purposes if a test fails
f17f9e9069f20f Eric Biggers 2022-03-26 282 * @inplace_mode: whether and how to operate on the data in-place, if applicable
3f47a03df6e811 Eric Biggers 2019-01-31 283 * @req_flags: extra request_flags, e.g. CRYPTO_TFM_REQ_MAY_SLEEP
3f47a03df6e811 Eric Biggers 2019-01-31 284 * @src_divs: description of how to arrange the source scatterlist
3f47a03df6e811 Eric Biggers 2019-01-31 285 * @dst_divs: description of how to arrange the dst scatterlist, if applicable
3f47a03df6e811 Eric Biggers 2019-01-31 286 * for the algorithm type. Defaults to @src_divs if unset.
3f47a03df6e811 Eric Biggers 2019-01-31 287 * @iv_offset: misalignment of the IV in the range [0..MAX_ALGAPI_ALIGNMASK+1],
3f47a03df6e811 Eric Biggers 2019-01-31 288 * where 0 is aligned to a 2*(MAX_ALGAPI_ALIGNMASK+1) byte boundary
3f47a03df6e811 Eric Biggers 2019-01-31 289 * @iv_offset_relative_to_alignmask: if true, add the algorithm's alignmask to
3f47a03df6e811 Eric Biggers 2019-01-31 290 * the @iv_offset
fd8c37c72d60c7 Eric Biggers 2019-12-01 291 * @key_offset: misalignment of the key, where 0 is default alignment
fd8c37c72d60c7 Eric Biggers 2019-12-01 292 * @key_offset_relative_to_alignmask: if true, add the algorithm's alignmask to
fd8c37c72d60c7 Eric Biggers 2019-12-01 293 * the @key_offset
3f47a03df6e811 Eric Biggers 2019-01-31 294 * @finalization_type: what finalization function to use for hashes
6570737c7fa047 Eric Biggers 2019-03-12 295 * @nosimd: execute with SIMD disabled? Requires !CRYPTO_TFM_REQ_MAY_SLEEP.
3f47a03df6e811 Eric Biggers 2019-01-31 296 */
3f47a03df6e811 Eric Biggers 2019-01-31 @297 struct testvec_config {
3f47a03df6e811 Eric Biggers 2019-01-31 298 const char *name;
f17f9e9069f20f Eric Biggers 2022-03-26 299 enum inplace_mode inplace_mode;
3f47a03df6e811 Eric Biggers 2019-01-31 300 u32 req_flags;
3f47a03df6e811 Eric Biggers 2019-01-31 301 struct test_sg_division src_divs[XBUFSIZE];
3f47a03df6e811 Eric Biggers 2019-01-31 302 struct test_sg_division dst_divs[XBUFSIZE];
3f47a03df6e811 Eric Biggers 2019-01-31 303 unsigned int iv_offset;
fd8c37c72d60c7 Eric Biggers 2019-12-01 304 unsigned int key_offset;
3f47a03df6e811 Eric Biggers 2019-01-31 305 bool iv_offset_relative_to_alignmask;
fd8c37c72d60c7 Eric Biggers 2019-12-01 306 bool key_offset_relative_to_alignmask;
3f47a03df6e811 Eric Biggers 2019-01-31 307 enum finalization_type finalization_type;
6570737c7fa047 Eric Biggers 2019-03-12 308 bool nosimd;
3f47a03df6e811 Eric Biggers 2019-01-31 309 };
3f47a03df6e811 Eric Biggers 2019-01-31 310

:::::: The code at line 297 was first introduced by commit
:::::: 3f47a03df6e81174558f4604828851cb600e1db6 crypto: testmgr - add testvec_config struct and helper functions

:::::: TO: Eric Biggers <ebiggers@xxxxxxxxxx>
:::::: CC: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

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https://01.org/lkp

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