From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
Date: Sun, 28 Nov 2021 17:45:43 +0800 [thread overview]
Message-ID: <202111281744.pmYRdJOc-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 15902 bytes --]
CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Chuck Lever <chuck.lever@oracle.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3498e7f2bb415e447354a3debef6738d9655768c
commit: 7954c8503b8709660d93505a40f1847634d9c3ba svcrdma: Remove chunk list pointers
date: 12 months ago
:::::: branch date: 11 hours ago
:::::: commit date: 12 months ago
config: x86_64-randconfig-c007-20211124 (https://download.01.org/0day-ci/archive/20211128/202111281744.pmYRdJOc-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c)
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
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7954c8503b8709660d93505a40f1847634d9c3ba
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 7954c8503b8709660d93505a40f1847634d9c3ba
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>)
result_msg = p;
^ ~
Suppressed 4 warnings (4 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.
6 warnings generated.
net/ceph/auth_x.c:35:22: warning: Value stored to 'xi' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct ceph_x_info *xi = ac->private;
^~ ~~~~~~~~~~~
net/ceph/auth_x.c:35:22: note: Value stored to 'xi' during its initialization is never read
struct ceph_x_info *xi = ac->private;
^~ ~~~~~~~~~~~
net/ceph/auth_x.c:591:2: warning: Value stored to 'result' is never read [clang-analyzer-deadcode.DeadStores]
result = le32_to_cpu(head->result);
^
net/ceph/auth_x.c:591:2: note: Value stored to 'result' is never read
Suppressed 4 warnings (4 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.
4 warnings generated.
Suppressed 4 warnings (4 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.
Suppressed 4 warnings (4 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.
4 warnings generated.
Suppressed 4 warnings (4 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 (2 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.
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.
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.
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.
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.
9 warnings generated.
lib/zstd/decompress.c:1557:4: warning: Value stored to 'remainingSize' is never read [clang-analyzer-deadcode.DeadStores]
remainingSize -= 4;
^ ~
lib/zstd/decompress.c:1557:4: note: Value stored to 'remainingSize' is never read
remainingSize -= 4;
^ ~
Suppressed 8 warnings (3 in non-user code, 5 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.
2 warnings generated.
4 warnings generated.
Suppressed 4 warnings (4 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.
Suppressed 4 warnings (4 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.
Suppressed 4 warnings (4 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.
Suppressed 4 warnings (4 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.
Suppressed 4 warnings (4 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.
Suppressed 4 warnings (4 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.
>> net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
return list_first_entry_or_null(list, struct svc_rdma_recv_ctxt,
^
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:377:17: note: Calling 'svc_rdma_next_recv_ctxt'
while ((ctxt = svc_rdma_next_recv_ctxt(&rdma->sc_read_complete_q))) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:9: note: Left side of '||' is false
return list_first_entry_or_null(list, struct svc_rdma_recv_ctxt,
^
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:277:3: note: expanded from macro '__native_word'
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
^
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:9: note: Left side of '||' is false
return list_first_entry_or_null(list, struct svc_rdma_recv_ctxt,
^
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:277:3: note: expanded from macro '__native_word'
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
^
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:9: note: Left side of '||' is false
return list_first_entry_or_null(list, struct svc_rdma_recv_ctxt,
^
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:277:3: note: expanded from macro '__native_word'
(sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \
^
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:9: note: Left side of '||' is true
return list_first_entry_or_null(list, struct svc_rdma_recv_ctxt,
^
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:36:38: note: expanded from macro 'compiletime_assert_rwonce_type'
compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
^
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:9: note: Taking false branch
return list_first_entry_or_null(list, struct svc_rdma_recv_ctxt,
^
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:315:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:303:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
^
include/linux/compiler_types.h:295:3: note: expanded from macro '__compiletime_assert'
if (!(condition)) \
^
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:9: note: Loop condition is false. Exiting loop
return list_first_entry_or_null(list, struct svc_rdma_recv_ctxt,
^
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:315:2: note: expanded from macro 'compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:303:2: note: expanded from macro '_compiletime_assert'
__compiletime_assert(condition, msg, prefix, suffix)
vim +117 net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
ecf85b2384ea5f Chuck Lever 2018-05-07 113
ecf85b2384ea5f Chuck Lever 2018-05-07 114 static inline struct svc_rdma_recv_ctxt *
ecf85b2384ea5f Chuck Lever 2018-05-07 115 svc_rdma_next_recv_ctxt(struct list_head *list)
ecf85b2384ea5f Chuck Lever 2018-05-07 116 {
ecf85b2384ea5f Chuck Lever 2018-05-07 @117 return list_first_entry_or_null(list, struct svc_rdma_recv_ctxt,
ecf85b2384ea5f Chuck Lever 2018-05-07 118 rc_list);
ecf85b2384ea5f Chuck Lever 2018-05-07 119 }
ecf85b2384ea5f Chuck Lever 2018-05-07 120
:::::: The code at line 117 was first introduced by commit
:::::: ecf85b2384ea5f7cb0577bf6143bc46d9ecfe4d3 svcrdma: Introduce svc_rdma_recv_ctxt
:::::: TO: Chuck Lever <chuck.lever@oracle.com>
:::::: CC: J. Bruce Fields <bfields@redhat.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
next reply other threads:[~2021-11-28 9:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-28 9:45 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-11-29 16:08 net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:117:2: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc] kernel test robot
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