* include/linux/skmsg.h:312:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
@ 2022-03-27 17:47 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2022-03-27 17:47 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 28195 bytes --]
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: Cong Wang <cong.wang@bytedance.com>
CC: Alexei Starovoitov <ast@kernel.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f022814633e1c600507b3a99691b4d624c2813f0
commit: b01fd6e802b6d0a635176f943315670b679d8d7b skmsg: Introduce a spinlock to protect ingress_msg
date: 12 months ago
:::::: branch date: 20 hours ago
:::::: commit date: 12 months ago
config: arm-randconfig-c002-20220327 (https://download.01.org/0day-ci/archive/20220328/202203280118.wPnZSh4H-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=b01fd6e802b6d0a635176f943315670b679d8d7b
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b01fd6e802b6d0a635176f943315670b679d8d7b
# 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/fscache/operation.c:597:3: note: Taking false branch
if (object->n_ops == 0)
^
fs/fscache/operation.c:601:3: note: Memory is released
kfree(op);
^~~~~~~~~
fs/fscache/operation.c:571:2: note: Loop condition is true. Execution continues on line 572
do {
^
fs/fscache/operation.c:573:7: note: Assuming the condition is false
if (list_empty(&cache->op_gc_list)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/fscache/operation.c:573:3: note: Taking false branch
if (list_empty(&cache->op_gc_list)) {
^
fs/fscache/operation.c:578:8: note: Left side of '&&' is false
op = list_entry(cache->op_gc_list.next,
^
include/linux/list.h:511:2: note: expanded from macro 'list_entry'
container_of(ptr, type, member)
^
include/linux/kernel.h:709:61: note: expanded from macro 'container_of'
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
^
fs/fscache/operation.c:578:8: note: Taking false branch
op = list_entry(cache->op_gc_list.next,
^
include/linux/list.h:511:2: note: expanded from macro 'list_entry'
container_of(ptr, type, member)
^
include/linux/kernel.h:709:2: 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:320:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:308:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:300:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
fs/fscache/operation.c:578:8: note: Loop condition is false. Exiting loop
op = list_entry(cache->op_gc_list.next,
^
include/linux/list.h:511:2: note: expanded from macro 'list_entry'
container_of(ptr, type, member)
^
include/linux/kernel.h:709:2: 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:320:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:308:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:298:2: note: expanded from macro '__compiletime_assert'
do { \
^
fs/fscache/operation.c:580:3: note: Calling 'list_del'
list_del(&op->pend_link);
^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/list.h:147:14: note: Use of memory after it is freed
entry->next = LIST_POISON1;
~~~~~~~~~~~ ^
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.
4 warnings generated.
Suppressed 4 warnings (2 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.
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.
drivers/power/supply/88pm860x_battery.c:197:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = ((buf[4] >> 6) << 10) | ((buf[3] >> 6) << 8)
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/power/supply/88pm860x_battery.c:197:3: note: Value stored to 'ret' is never read
ret = ((buf[4] >> 6) << 10) | ((buf[3] >> 6) << 8)
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
>> include/linux/skmsg.h:312:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
return msg;
^
net/ipv4/tcp_bpf.c:21:11: note: Calling 'sk_psock_peek_msg'
msg_rx = sk_psock_peek_msg(psock);
^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/skmsg.h:310:8: note: Left side of '||' is false
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:21: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:282:3: note: expanded from macro '__native_word'
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
^
include/linux/skmsg.h:310:8: note: Left side of '||' is false
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:21: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:282:3: note: expanded from macro '__native_word'
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
^
include/linux/skmsg.h:310:8: note: Left side of '||' is true
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:21: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:283:28: note: expanded from macro '__native_word'
sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
^
include/linux/skmsg.h:310:8: note: Taking false branch
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:2: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:320:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:308:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:300:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
include/linux/skmsg.h:310:8: note: Loop condition is false. Exiting loop
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:2: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:320:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:308:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:298:2: note: expanded from macro '__compiletime_assert'
do { \
^
include/linux/skmsg.h:310:8: note: Assuming 'pos__' is not equal to 'head__'
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:546:2: note: expanded from macro 'list_first_entry_or_null'
pos__ != head__ ? list_entry(pos__, type, member) : NULL; \
^~~~~~~~~~~~~~~
include/linux/skmsg.h:310:8: note: '?' condition is true
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
--
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 (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.
6 warnings generated.
drivers/bus/mhi/core/pm.c:322:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:322:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:379:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:379:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:709:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:709:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:728:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:728:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:1203:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:1203:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
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 (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.
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 (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.
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.
3 warnings generated.
>> include/linux/skmsg.h:312:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
return msg;
^
net/ipv4/tcp_bpf.c:21:11: note: Calling 'sk_psock_peek_msg'
msg_rx = sk_psock_peek_msg(psock);
^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/skmsg.h:310:8: note: Left side of '||' is false
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:21: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:282:3: note: expanded from macro '__native_word'
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
^
include/linux/skmsg.h:310:8: note: Left side of '||' is false
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:21: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:282:3: note: expanded from macro '__native_word'
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
^
include/linux/skmsg.h:310:8: note: Left side of '||' is true
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:21: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:283:28: note: expanded from macro '__native_word'
sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
^
include/linux/skmsg.h:310:8: note: Taking false branch
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:2: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:320:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:308:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:300:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
include/linux/skmsg.h:310:8: note: Loop condition is false. Exiting loop
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:545:28: note: expanded from macro 'list_first_entry_or_null'
struct list_head *pos__ = READ_ONCE(head__->next); \
^
include/asm-generic/rwonce.h:49:2: note: expanded from macro 'READ_ONCE'
compiletime_assert_rwonce_type(x); \
^
include/asm-generic/rwonce.h:36:2: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
include/linux/compiler_types.h:320:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:308:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:298:2: note: expanded from macro '__compiletime_assert'
do { \
^
include/linux/skmsg.h:310:8: note: Assuming 'pos__' is not equal to 'head__'
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
^
include/linux/list.h:546:2: note: expanded from macro 'list_first_entry_or_null'
pos__ != head__ ? list_entry(pos__, type, member) : NULL; \
^~~~~~~~~~~~~~~
include/linux/skmsg.h:310:8: note: '?' condition is true
msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
vim +312 include/linux/skmsg.h
b01fd6e802b6d0a Cong Wang 2021-03-30 304
b01fd6e802b6d0a Cong Wang 2021-03-30 305 static inline struct sk_msg *sk_psock_peek_msg(struct sk_psock *psock)
b01fd6e802b6d0a Cong Wang 2021-03-30 306 {
b01fd6e802b6d0a Cong Wang 2021-03-30 307 struct sk_msg *msg;
b01fd6e802b6d0a Cong Wang 2021-03-30 308
b01fd6e802b6d0a Cong Wang 2021-03-30 309 spin_lock_bh(&psock->ingress_lock);
b01fd6e802b6d0a Cong Wang 2021-03-30 310 msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list);
b01fd6e802b6d0a Cong Wang 2021-03-30 311 spin_unlock_bh(&psock->ingress_lock);
b01fd6e802b6d0a Cong Wang 2021-03-30 @312 return msg;
b01fd6e802b6d0a Cong Wang 2021-03-30 313 }
b01fd6e802b6d0a Cong Wang 2021-03-30 314
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2022-03-27 17:47 include/linux/skmsg.h:312:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc] kernel test robot
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