* drivers/crypto/qce/aead.c:148:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
@ 2022-03-28 10:02 kernel test robot
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From: kernel test robot @ 2022-03-28 10:02 UTC (permalink / raw)
To: kbuild
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CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
BCC: lkp(a)intel.com
CC: linux-kernel(a)vger.kernel.org
TO: Thara Gopinath <thara.gopinath@linaro.org>
CC: Herbert Xu <herbert@gondor.apana.org.au>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: ae085d7f9365de7da27ab5c0d16b12d51ea7fca9
commit: 9363efb4181c5e0fbf86bdfa759262aa29f0eb50 crypto: qce - Add support for AEAD algorithms
date: 11 months ago
:::::: branch date: 8 hours ago
:::::: commit date: 11 months ago
config: arm-randconfig-c002-20220327 (https://download.01.org/0day-ci/archive/20220328/202203281716.1kazgnbl-lkp(a)intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0f6d9501cf49ce02937099350d08f20c4af86f3d)
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=9363efb4181c5e0fbf86bdfa759262aa29f0eb50
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 9363efb4181c5e0fbf86bdfa759262aa29f0eb50
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
Suppressed 1 warnings (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
drivers/of/property.c:920:19: warning: Access to field 'full_name' results in a dereference of a null pointer [clang-analyzer-core.NullDereference]
return kbasename(to_of_node(fwnode)->full_name);
^
include/linux/of.h:161:2: note: expanded from macro 'to_of_node'
({ \
^
drivers/of/property.c:920:19: note: '?' condition is false
return kbasename(to_of_node(fwnode)->full_name);
^
include/linux/of.h:164:3: note: expanded from macro 'to_of_node'
is_of_node(__to_of_node_fwnode) ? \
^
drivers/of/property.c:920:19: note: Access to field 'full_name' results in a dereference of a null pointer
return kbasename(to_of_node(fwnode)->full_name);
^
include/linux/of.h:161:2: note: expanded from macro 'to_of_node'
({ \
^
drivers/of/property.c:926:7: warning: Access to field 'parent' results in a dereference of a null pointer [clang-analyzer-core.NullDereference]
if (!to_of_node(fwnode)->parent)
^
include/linux/of.h:161:2: note: expanded from macro 'to_of_node'
({ \
^
drivers/of/property.c:926:7: note: '?' condition is false
if (!to_of_node(fwnode)->parent)
^
include/linux/of.h:164:3: note: expanded from macro 'to_of_node'
is_of_node(__to_of_node_fwnode) ? \
^
drivers/of/property.c:926:7: note: Access to field 'parent' results in a dereference of a null pointer
if (!to_of_node(fwnode)->parent)
^
include/linux/of.h:161:2: note: expanded from macro 'to_of_node'
({ \
^
1 warning generated.
Suppressed 1 warnings (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
1 warning generated.
Suppressed 1 warnings (1 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 (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
7 warnings generated.
Suppressed 7 warnings (1 in non-user code, 6 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.
1 warning generated.
Suppressed 1 warnings (1 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 (1 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.
1 warning generated.
Suppressed 1 warnings (1 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.
drivers/crypto/mxs-dcp.c:285:22: warning: Value stored to 'src' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct scatterlist *src = req->src;
^~~ ~~~~~~~~
drivers/crypto/mxs-dcp.c:285:22: note: Value stored to 'src' during its initialization is never read
struct scatterlist *src = req->src;
^~~ ~~~~~~~~
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.
6 warnings generated.
Suppressed 6 warnings (2 in non-user code, 4 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.
4 warnings generated.
>> drivers/crypto/qce/aead.c:148:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = PTR_ERR(sg);
^ ~~~~~~~~~~~
drivers/crypto/qce/aead.c:148:4: note: Value stored to 'ret' is never read
ret = PTR_ERR(sg);
^ ~~~~~~~~~~~
drivers/crypto/qce/aead.c:154:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = PTR_ERR(sg);
^ ~~~~~~~~~~~
drivers/crypto/qce/aead.c:154:4: note: Value stored to 'ret' is never read
ret = PTR_ERR(sg);
^ ~~~~~~~~~~~
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.
1 warning generated.
Suppressed 1 warnings (1 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.
drivers/gpu/drm/rcar-du/rcar_lvds.c:105:20: warning: Value stored to 'lvds' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
^~~~
drivers/gpu/drm/rcar-du/rcar_lvds.c:105:20: note: Value stored to 'lvds' during its initialization is never read
struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
^~~~
drivers/gpu/drm/rcar-du/rcar_lvds.c:315:28: warning: Division by zero [clang-analyzer-core.DivideZero]
output = fin * pll->pll_n / pll->pll_m / (1 << pll->pll_e)
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:373:27: note: Left side of '&&' is false
struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:81:2: note: expanded from macro 'bridge_to_rcar_lvds'
container_of(b, struct rcar_lvds, bridge)
^
include/linux/kernel.h:704:61: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:373:27: note: Taking false branch
struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:81:2: note: expanded from macro 'bridge_to_rcar_lvds'
container_of(b, struct rcar_lvds, bridge)
^
include/linux/kernel.h:704:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:308:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:373:27: note: Loop condition is false. Exiting loop
struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:81:2: note: expanded from macro 'bridge_to_rcar_lvds'
container_of(b, struct rcar_lvds, bridge)
^
include/linux/kernel.h:704:2: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:306:2: note: expanded from macro '__compiletime_assert'
do { \
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:376:14: note: Assuming the condition is false
if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)))
^
include/asm-generic/bug.h:188:25: note: expanded from macro 'WARN_ON'
int __ret_warn_on = !!(condition); \
^~~~~~~~~
drivers/gpu/drm/rcar-du/rcar_lvds.c:376:2: note: Taking false branch
if (WARN_ON(!(lvds->info->quirks & RCAR_LVDS_QUIRK_EXT_PLL)))
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:379:2: note: Taking false branch
dev_dbg(lvds->dev, "enabling LVDS PLL, freq=%luHz\n", freq);
^
include/linux/dev_printk.h:130:2: note: expanded from macro 'dev_dbg'
if (0) \
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:382:6: note: Assuming 'ret' is >= 0
if (ret < 0)
^~~~~~~
drivers/gpu/drm/rcar-du/rcar_lvds.c:382:2: note: Taking false branch
if (ret < 0)
^
drivers/gpu/drm/rcar-du/rcar_lvds.c:385:2: note: Calling '__rcar_lvds_pll_setup_d3_e3'
__rcar_lvds_pll_setup_d3_e3(lvds, freq, true);
vim +/ret +148 drivers/crypto/qce/aead.c
9363efb4181c5e Thara Gopinath 2021-04-29 111
9363efb4181c5e Thara Gopinath 2021-04-29 112 static struct scatterlist *
9363efb4181c5e Thara Gopinath 2021-04-29 113 qce_aead_prepare_dst_buf(struct aead_request *req)
9363efb4181c5e Thara Gopinath 2021-04-29 114 {
9363efb4181c5e Thara Gopinath 2021-04-29 115 struct qce_aead_reqctx *rctx = aead_request_ctx(req);
9363efb4181c5e Thara Gopinath 2021-04-29 116 struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req));
9363efb4181c5e Thara Gopinath 2021-04-29 117 struct qce_device *qce = tmpl->qce;
9363efb4181c5e Thara Gopinath 2021-04-29 118 struct scatterlist *sg, *msg_sg, __sg[2];
9363efb4181c5e Thara Gopinath 2021-04-29 119 gfp_t gfp;
9363efb4181c5e Thara Gopinath 2021-04-29 120 unsigned int assoclen = req->assoclen;
9363efb4181c5e Thara Gopinath 2021-04-29 121 unsigned int totallen;
9363efb4181c5e Thara Gopinath 2021-04-29 122 int ret;
9363efb4181c5e Thara Gopinath 2021-04-29 123
9363efb4181c5e Thara Gopinath 2021-04-29 124 totallen = rctx->cryptlen + assoclen;
9363efb4181c5e Thara Gopinath 2021-04-29 125 rctx->dst_nents = sg_nents_for_len(req->dst, totallen);
9363efb4181c5e Thara Gopinath 2021-04-29 126 if (rctx->dst_nents < 0) {
9363efb4181c5e Thara Gopinath 2021-04-29 127 dev_err(qce->dev, "Invalid numbers of dst SG.\n");
9363efb4181c5e Thara Gopinath 2021-04-29 128 return ERR_PTR(-EINVAL);
9363efb4181c5e Thara Gopinath 2021-04-29 129 }
9363efb4181c5e Thara Gopinath 2021-04-29 130 if (IS_CCM(rctx->flags))
9363efb4181c5e Thara Gopinath 2021-04-29 131 rctx->dst_nents += 2;
9363efb4181c5e Thara Gopinath 2021-04-29 132 else
9363efb4181c5e Thara Gopinath 2021-04-29 133 rctx->dst_nents += 1;
9363efb4181c5e Thara Gopinath 2021-04-29 134
9363efb4181c5e Thara Gopinath 2021-04-29 135 gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
9363efb4181c5e Thara Gopinath 2021-04-29 136 GFP_KERNEL : GFP_ATOMIC;
9363efb4181c5e Thara Gopinath 2021-04-29 137 ret = sg_alloc_table(&rctx->dst_tbl, rctx->dst_nents, gfp);
9363efb4181c5e Thara Gopinath 2021-04-29 138 if (ret)
9363efb4181c5e Thara Gopinath 2021-04-29 139 return ERR_PTR(ret);
9363efb4181c5e Thara Gopinath 2021-04-29 140
9363efb4181c5e Thara Gopinath 2021-04-29 141 if (IS_CCM(rctx->flags) && assoclen) {
9363efb4181c5e Thara Gopinath 2021-04-29 142 /* Get the dst buffer */
9363efb4181c5e Thara Gopinath 2021-04-29 143 msg_sg = scatterwalk_ffwd(__sg, req->dst, assoclen);
9363efb4181c5e Thara Gopinath 2021-04-29 144
9363efb4181c5e Thara Gopinath 2021-04-29 145 sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->adata_sg,
9363efb4181c5e Thara Gopinath 2021-04-29 146 rctx->assoclen);
9363efb4181c5e Thara Gopinath 2021-04-29 147 if (IS_ERR(sg)) {
9363efb4181c5e Thara Gopinath 2021-04-29 @148 ret = PTR_ERR(sg);
9363efb4181c5e Thara Gopinath 2021-04-29 149 goto dst_tbl_free;
9363efb4181c5e Thara Gopinath 2021-04-29 150 }
9363efb4181c5e Thara Gopinath 2021-04-29 151 /* dst buffer */
9363efb4181c5e Thara Gopinath 2021-04-29 152 sg = qce_sgtable_add(&rctx->dst_tbl, msg_sg, rctx->cryptlen);
9363efb4181c5e Thara Gopinath 2021-04-29 153 if (IS_ERR(sg)) {
9363efb4181c5e Thara Gopinath 2021-04-29 154 ret = PTR_ERR(sg);
9363efb4181c5e Thara Gopinath 2021-04-29 155 goto dst_tbl_free;
9363efb4181c5e Thara Gopinath 2021-04-29 156 }
9363efb4181c5e Thara Gopinath 2021-04-29 157 totallen = rctx->cryptlen + rctx->assoclen;
9363efb4181c5e Thara Gopinath 2021-04-29 158 } else {
9363efb4181c5e Thara Gopinath 2021-04-29 159 if (totallen) {
9363efb4181c5e Thara Gopinath 2021-04-29 160 sg = qce_sgtable_add(&rctx->dst_tbl, req->dst, totallen);
9363efb4181c5e Thara Gopinath 2021-04-29 161 if (IS_ERR(sg))
9363efb4181c5e Thara Gopinath 2021-04-29 162 goto dst_tbl_free;
9363efb4181c5e Thara Gopinath 2021-04-29 163 }
9363efb4181c5e Thara Gopinath 2021-04-29 164 }
9363efb4181c5e Thara Gopinath 2021-04-29 165 if (IS_CCM(rctx->flags))
9363efb4181c5e Thara Gopinath 2021-04-29 166 sg = qce_aead_prepare_ccm_result_buf(&rctx->dst_tbl, req);
9363efb4181c5e Thara Gopinath 2021-04-29 167 else
9363efb4181c5e Thara Gopinath 2021-04-29 168 sg = qce_aead_prepare_result_buf(&rctx->dst_tbl, req);
9363efb4181c5e Thara Gopinath 2021-04-29 169
9363efb4181c5e Thara Gopinath 2021-04-29 170 if (IS_ERR(sg))
9363efb4181c5e Thara Gopinath 2021-04-29 171 goto dst_tbl_free;
9363efb4181c5e Thara Gopinath 2021-04-29 172
9363efb4181c5e Thara Gopinath 2021-04-29 173 sg_mark_end(sg);
9363efb4181c5e Thara Gopinath 2021-04-29 174 rctx->dst_sg = rctx->dst_tbl.sgl;
9363efb4181c5e Thara Gopinath 2021-04-29 175 rctx->dst_nents = sg_nents_for_len(rctx->dst_sg, totallen) + 1;
9363efb4181c5e Thara Gopinath 2021-04-29 176
9363efb4181c5e Thara Gopinath 2021-04-29 177 return sg;
9363efb4181c5e Thara Gopinath 2021-04-29 178
9363efb4181c5e Thara Gopinath 2021-04-29 179 dst_tbl_free:
9363efb4181c5e Thara Gopinath 2021-04-29 180 sg_free_table(&rctx->dst_tbl);
9363efb4181c5e Thara Gopinath 2021-04-29 181 return sg;
9363efb4181c5e Thara Gopinath 2021-04-29 182 }
9363efb4181c5e Thara Gopinath 2021-04-29 183
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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2022-03-28 10:02 drivers/crypto/qce/aead.c:148:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] kernel test robot
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