Re: [PATCH v2] scsi: target: pin db_root for metadata writes
From: kernel test robot
Date: Fri Aug 21 2026 - 08:21:26 EST
Hi Runyu,
kernel test robot noticed the following build errors:
[auto build test ERROR on mkp-scsi/for-next]
[also build test ERROR on v7.2]
[cannot apply to linus/master next-20260820]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Runyu-Xiao/scsi-target-pin-db_root-for-metadata-writes/20260818-131442
base: https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
patch link: https://lore.kernel.org/r/20260818051442.1523210-1-runyu.xiao%40seu.edu.cn
patch subject: [PATCH v2] scsi: target: pin db_root for metadata writes
config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20260821/202608212004.Xyev8OzS-lkp@xxxxxxxxx/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 935bfc708590c60147a79c7df145bb6e68b1d388)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260821/202608212004.Xyev8OzS-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202608212004.Xyev8OzS-lkp@xxxxxxxxx/
All error/warnings (new ones prefixed by >>):
>> drivers/target/target_core_configfs.c:3757:2: warning: adding 'int' to a string does not append to the string [-Wstring-plus-int]
3757 | strscpy(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/string.h:111:2: note: expanded from macro 'strscpy'
111 | CONCATENATE(__strscpy, COUNT_ARGS(__VA_ARGS__))(dst, src, __VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/args.h:26:27: note: expanded from macro 'CONCATENATE'
26 | #define CONCATENATE(a, b) __CONCAT(a, b)
| ^
include/linux/args.h:25:24: note: expanded from macro '__CONCAT'
25 | #define __CONCAT(a, b) a ## b
| ^
<scratch space>:29:1: note: expanded from here
29 | __strscpy1
| ^
include/linux/string.h:80:31: note: expanded from macro '__strscpy1'
80 | sized_strscpy(dst, src, size + __must_be_cstr(dst) + __must_be_cstr(src))
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3757:2: note: use array indexing to silence this warning
include/linux/string.h:111:2: note: expanded from macro 'strscpy'
111 | CONCATENATE(__strscpy, COUNT_ARGS(__VA_ARGS__))(dst, src, __VA_ARGS__)
| ^
include/linux/args.h:26:27: note: expanded from macro 'CONCATENATE'
26 | #define CONCATENATE(a, b) __CONCAT(a, b)
| ^
include/linux/args.h:25:24: note: expanded from macro '__CONCAT'
25 | #define __CONCAT(a, b) a ## b
| ^
<scratch space>:29:1: note: expanded from here
29 | __strscpy1
| ^
include/linux/string.h:80:31: note: expanded from macro '__strscpy1'
80 | sized_strscpy(dst, src, size + __must_be_cstr(dst) + __must_be_cstr(src))
| ^
>> drivers/target/target_core_configfs.c:3757:25: error: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *' [-Wint-conversion]
3757 | strscpy(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
| ^~~~~~~~~~~
drivers/target/target_core_internal.h:169:22: note: expanded from macro 'DB_ROOT_LEN'
169 | #define DB_ROOT_LEN 4096
| ^~~~
include/linux/string.h:70:43: note: passing argument to parameter here
70 | ssize_t sized_strscpy(char *, const char *, size_t);
| ^
>> drivers/target/target_core_configfs.c:3757:38: error: incompatible pointer to integer conversion passing 'char *' to parameter of type 'size_t' (aka 'unsigned long') [-Wint-conversion]
3757 | strscpy(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
drivers/target/target_core_internal.h:171:27: note: expanded from macro 'DB_ROOT_PREFERRED'
171 | #define DB_ROOT_PREFERRED "/etc/target"
| ^
include/linux/string.h:111:60: note: expanded from macro 'strscpy'
111 | CONCATENATE(__strscpy, COUNT_ARGS(__VA_ARGS__))(dst, src, __VA_ARGS__)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
include/linux/string.h:80:26: note: expanded from macro '__strscpy1'
80 | sized_strscpy(dst, src, size + __must_be_cstr(dst) + __must_be_cstr(src))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/string.h:70:51: note: passing argument to parameter here
70 | ssize_t sized_strscpy(char *, const char *, size_t);
| ^
drivers/target/target_core_configfs.c:3760:3: warning: adding 'int' to a string does not append to the string [-Wstring-plus-int]
3760 | strscpy(db_root_stage, DB_ROOT_LEN, DB_ROOT_DEFAULT);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/string.h:111:2: note: expanded from macro 'strscpy'
111 | CONCATENATE(__strscpy, COUNT_ARGS(__VA_ARGS__))(dst, src, __VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/args.h:26:27: note: expanded from macro 'CONCATENATE'
26 | #define CONCATENATE(a, b) __CONCAT(a, b)
| ^
include/linux/args.h:25:24: note: expanded from macro '__CONCAT'
25 | #define __CONCAT(a, b) a ## b
| ^
<scratch space>:30:1: note: expanded from here
30 | __strscpy1
| ^
include/linux/string.h:80:31: note: expanded from macro '__strscpy1'
80 | sized_strscpy(dst, src, size + __must_be_cstr(dst) + __must_be_cstr(src))
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
drivers/target/target_core_configfs.c:3760:3: note: use array indexing to silence this warning
include/linux/string.h:111:2: note: expanded from macro 'strscpy'
111 | CONCATENATE(__strscpy, COUNT_ARGS(__VA_ARGS__))(dst, src, __VA_ARGS__)
| ^
include/linux/args.h:26:27: note: expanded from macro 'CONCATENATE'
26 | #define CONCATENATE(a, b) __CONCAT(a, b)
| ^
include/linux/args.h:25:24: note: expanded from macro '__CONCAT'
25 | #define __CONCAT(a, b) a ## b
| ^
<scratch space>:30:1: note: expanded from here
30 | __strscpy1
| ^
include/linux/string.h:80:31: note: expanded from macro '__strscpy1'
80 | sized_strscpy(dst, src, size + __must_be_cstr(dst) + __must_be_cstr(src))
| ^
drivers/target/target_core_configfs.c:3760:26: error: incompatible integer to pointer conversion passing 'int' to parameter of type 'const char *' [-Wint-conversion]
3760 | strscpy(db_root_stage, DB_ROOT_LEN, DB_ROOT_DEFAULT);
| ^~~~~~~~~~~
drivers/target/target_core_internal.h:169:22: note: expanded from macro 'DB_ROOT_LEN'
169 | #define DB_ROOT_LEN 4096
| ^~~~
include/linux/string.h:70:43: note: passing argument to parameter here
70 | ssize_t sized_strscpy(char *, const char *, size_t);
| ^
drivers/target/target_core_configfs.c:3760:39: error: incompatible pointer to integer conversion passing 'char *' to parameter of type 'size_t' (aka 'unsigned long') [-Wint-conversion]
3760 | strscpy(db_root_stage, DB_ROOT_LEN, DB_ROOT_DEFAULT);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
drivers/target/target_core_internal.h:170:26: note: expanded from macro 'DB_ROOT_DEFAULT'
170 | #define DB_ROOT_DEFAULT "/var/target"
| ^
include/linux/string.h:111:60: note: expanded from macro 'strscpy'
111 | CONCATENATE(__strscpy, COUNT_ARGS(__VA_ARGS__))(dst, src, __VA_ARGS__)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
include/linux/string.h:80:26: note: expanded from macro '__strscpy1'
80 | sized_strscpy(dst, src, size + __must_be_cstr(dst) + __must_be_cstr(src))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/string.h:70:51: note: passing argument to parameter here
70 | ssize_t sized_strscpy(char *, const char *, size_t);
| ^
2 warnings and 4 errors generated.
vim +3757 drivers/target/target_core_configfs.c
3751
3752 static void target_init_dbroot(void)
3753 {
3754 struct path path = {};
3755 int ret;
3756
> 3757 strscpy(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3758 ret = target_validate_db_root(db_root_stage, &path);
3759 if (ret) {
3760 strscpy(db_root_stage, DB_ROOT_LEN, DB_ROOT_DEFAULT);
3761 ret = target_validate_db_root(db_root_stage, &path);
3762 if (ret)
3763 return;
3764 }
3765
3766 db_root_path = path;
3767 strscpy(db_root, db_root_stage);
3768 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3769 }
3770
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki