From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: Re: [PATCH RFC bpf-next v1 5/8] bpf: Introduce a new program type bpf_view.
Date: Mon, 10 Jan 2022 15:06:47 +0800 [thread overview]
Message-ID: <202201101429.2XquVD3A-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 15611 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
In-Reply-To: <20220106215059.2308931-6-haoluo@google.com>
References: <20220106215059.2308931-6-haoluo@google.com>
TO: Hao Luo <haoluo@google.com>
Hi Hao,
[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on bpf-next/master]
url: https://github.com/0day-ci/linux/commits/Hao-Luo/Pinning-bpf-objects-outside-bpffs/20220107-055252
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
:::::: branch date: 3 days ago
:::::: commit date: 3 days ago
config: arm-randconfig-c002-20220107 (https://download.01.org/0day-ci/archive/20220110/202201101429.2XquVD3A-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 32167bfe64a4c5dd4eb3f7a58e24f4cba76f5ac2)
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://github.com/0day-ci/linux/commit/f3a5b66e45ed0d7bdc610cce2e0b6a3c606dbb95
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Hao-Luo/Pinning-bpf-objects-outside-bpffs/20220107-055252
git checkout f3a5b66e45ed0d7bdc610cce2e0b6a3c606dbb95
# 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 >>)
fs/ext4/mballoc.c:5817:3: note: Value stored to 'err' is never read
err = PTR_ERR(bitmap_bh);
^ ~~~~~~~~~~~~~~~~~~
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.
2 warnings generated.
fs/xfs/libxfs/xfs_attr.c:1243:2: warning: Value stored to 'error' is never read [clang-analyzer-deadcode.DeadStores]
error = xfs_attr_node_removename(args, state);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/xfs/libxfs/xfs_attr.c:1243:2: note: Value stored to 'error' is never read
error = xfs_attr_node_removename(args, state);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
fs/xfs/libxfs/xfs_attr_leaf.c:2243:29: warning: Value stored to 'drop_leaf' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct xfs_attr_leafblock *drop_leaf = drop_blk->bp->b_addr;
^~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~
fs/xfs/libxfs/xfs_attr_leaf.c:2243:29: note: Value stored to 'drop_leaf' during its initialization is never read
struct xfs_attr_leafblock *drop_leaf = drop_blk->bp->b_addr;
^~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~
fs/xfs/libxfs/xfs_attr_leaf.c:2244:29: warning: Value stored to 'save_leaf' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct xfs_attr_leafblock *save_leaf = save_blk->bp->b_addr;
^~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~
fs/xfs/libxfs/xfs_attr_leaf.c:2244:29: note: Value stored to 'save_leaf' during its initialization is never read
struct xfs_attr_leafblock *save_leaf = save_blk->bp->b_addr;
^~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~
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.
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.
fs/xfs/xfs_reflink.c:1151:3: warning: Value stored to 'qdelta' is never read [clang-analyzer-deadcode.DeadStores]
qdelta += dmap->br_blockcount;
^ ~~~~~~~~~~~~~~~~~~~
fs/xfs/xfs_reflink.c:1151:3: note: Value stored to 'qdelta' is never read
qdelta += dmap->br_blockcount;
^ ~~~~~~~~~~~~~~~~~~~
fs/xfs/xfs_reflink.c:1326:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = -EINVAL;
^ ~~~~~~~
fs/xfs/xfs_reflink.c:1326:2: note: Value stored to 'ret' is never read
ret = -EINVAL;
^ ~~~~~~~
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.
drivers/clk/clk-max9485.c:199:9: warning: Access to field 'out' results in a dereference of a null pointer (loaded from variable 'prev') [clang-analyzer-core.NullDereference]
return prev->out;
^~~~
drivers/clk/clk-max9485.c:165:36: note: 'prev' initialized to a null pointer value
const struct max9485_rate *curr, *prev = NULL;
^~~~
drivers/clk/clk-max9485.c:167:29: note: Assuming field 'out' is equal to 0
for (curr = max9485_rates; curr->out != 0; curr++) {
^~~~~~~~~~~~~~
drivers/clk/clk-max9485.c:167:2: note: Loop condition is false. Execution continues on line 199
for (curr = max9485_rates; curr->out != 0; curr++) {
^
drivers/clk/clk-max9485.c:199:9: note: Access to field 'out' results in a dereference of a null pointer (loaded from variable 'prev')
return prev->out;
^~~~
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.
>> kernel/bpf/bpf_view.c:151:36: warning: Array subscript is undefined [clang-analyzer-core.uninitialized.ArraySubscript]
target->ctx_arg_info[i].btf_id = bpf_view_btf_ids[idx[i]];
^
kernel/bpf/bpf_view.c:174:2: note: Calling 'register_bpf_view_target'
register_bpf_view_target(&cgroup_view_tinfo, cgroup_view_idx);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/bpf/bpf_view.c:150:14: note: Assuming 'i' is < field 'ctx_arg_info_size'
for (i = 0; i < target->ctx_arg_info_size; ++i)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/bpf/bpf_view.c:150:2: note: Loop condition is true. Entering loop body
for (i = 0; i < target->ctx_arg_info_size; ++i)
^
kernel/bpf/bpf_view.c:150:14: note: Assuming 'i' is < field 'ctx_arg_info_size'
for (i = 0; i < target->ctx_arg_info_size; ++i)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/bpf/bpf_view.c:150:2: note: Loop condition is true. Entering loop body
for (i = 0; i < target->ctx_arg_info_size; ++i)
^
kernel/bpf/bpf_view.c:150:45: note: The value 2 is assigned to 'i'
for (i = 0; i < target->ctx_arg_info_size; ++i)
^~~
kernel/bpf/bpf_view.c:150:14: note: Assuming 'i' is < field 'ctx_arg_info_size'
for (i = 0; i < target->ctx_arg_info_size; ++i)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/bpf/bpf_view.c:150:2: note: Loop condition is true. Entering loop body
for (i = 0; i < target->ctx_arg_info_size; ++i)
^
kernel/bpf/bpf_view.c:151:36: note: Array subscript is undefined
target->ctx_arg_info[i].btf_id = bpf_view_btf_ids[idx[i]];
^ ~~~~~~
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.
3 warnings generated.
mm/slab.c:1645:2: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
list_for_each_entry_safe(page, n, list, slab_list) {
^
include/linux/list.h:718:7: note: expanded from macro 'list_for_each_entry_safe'
n = list_next_entry(pos, member); \
^
include/linux/list.h:557:2: note: expanded from macro 'list_next_entry'
list_entry((pos)->member.next, typeof(*(pos)), member)
^
include/linux/list.h:513:2: note: expanded from macro 'list_entry'
container_of(ptr, type, member)
^
include/linux/container_of.h:18:2: note: expanded from macro 'container_of'
void *__mptr = (void *)(ptr); \
^
mm/slab.c:4135:6: note: Assuming 'count' is <= MAX_SLABINFO_WRITE
if (count > MAX_SLABINFO_WRITE)
^~~~~~~~~~~~~~~~~~~~~~~~~~
mm/slab.c:4135:2: note: Taking false branch
if (count > MAX_SLABINFO_WRITE)
^
mm/slab.c:4137:2: note: Taking false branch
if (copy_from_user(&kbuf, buffer, count))
^
mm/slab.c:4142:6: note: Assuming 'tmp' is non-null
if (!tmp)
^~~~
mm/slab.c:4142:2: note: Taking false branch
if (!tmp)
^
mm/slab.c:4146:6: note: Assuming the condition is false
if (sscanf(tmp, " %d %d %d", &limit, &batchcount, &shared) != 3)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/slab.c:4146:2: note: Taking false branch
if (sscanf(tmp, " %d %d %d", &limit, &batchcount, &shared) != 3)
^
mm/slab.c:4152:2: note: Loop condition is true. Entering loop body
list_for_each_entry(cachep, &slab_caches, list) {
^
include/linux/list.h:630:2: note: expanded from macro 'list_for_each_entry'
for (pos = list_first_entry(head, typeof(*pos), member); \
^
mm/slab.c:4153:7: note: Assuming the condition is true
if (!strcmp(cachep->name, kbuf)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~
mm/slab.c:4153:3: note: Taking true branch
if (!strcmp(cachep->name, kbuf)) {
^
mm/slab.c:4154:8: note: Assuming 'limit' is >= 1
if (limit < 1 || batchcount < 1 ||
^~~~~~~~~
mm/slab.c:4154:8: note: Left side of '||' is false
mm/slab.c:4154:21: note: Assuming 'batchcount' is >= 1
if (limit < 1 || batchcount < 1 ||
^~~~~~~~~~~~~~
mm/slab.c:4154:8: note: Left side of '||' is false
if (limit < 1 || batchcount < 1 ||
^
mm/slab.c:4155:6: note: Assuming 'batchcount' is <= 'limit'
batchcount > limit || shared < 0) {
^~~~~~~~~~~~~~~~~~
mm/slab.c:4154:8: note: Left side of '||' is false
vim +151 kernel/bpf/bpf_view.c
f3a5b66e45ed0d Hao Luo 2022-01-06 144
f3a5b66e45ed0d Hao Luo 2022-01-06 145 static void register_bpf_view_target(struct bpf_view_target_info *target,
f3a5b66e45ed0d Hao Luo 2022-01-06 146 int idx[BPF_VIEW_CTX_ARG_MAX])
f3a5b66e45ed0d Hao Luo 2022-01-06 147 {
f3a5b66e45ed0d Hao Luo 2022-01-06 148 int i;
f3a5b66e45ed0d Hao Luo 2022-01-06 149
f3a5b66e45ed0d Hao Luo 2022-01-06 150 for (i = 0; i < target->ctx_arg_info_size; ++i)
f3a5b66e45ed0d Hao Luo 2022-01-06 @151 target->ctx_arg_info[i].btf_id = bpf_view_btf_ids[idx[i]];
f3a5b66e45ed0d Hao Luo 2022-01-06 152
f3a5b66e45ed0d Hao Luo 2022-01-06 153 INIT_LIST_HEAD(&target->list);
f3a5b66e45ed0d Hao Luo 2022-01-06 154 list_add(&target->list, &targets);
f3a5b66e45ed0d Hao Luo 2022-01-06 155 }
f3a5b66e45ed0d Hao Luo 2022-01-06 156
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
next reply other threads:[~2022-01-10 7:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-10 7:06 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-01-06 21:50 [PATCH RFC bpf-next v1 0/8] Pinning bpf objects outside bpffs Hao Luo
2022-01-06 21:50 ` [PATCH RFC bpf-next v1 5/8] bpf: Introduce a new program type bpf_view Hao Luo
2022-01-07 0:35 ` Yonghong Song
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