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Message-ID: <202204212124.c4Cz1ERW-lkp@intel.com>
Date: Thu, 21 Apr 2022 21:43:14 +0800
From: kernel test robot <lkp@...el.com>
To: Kees Cook <keescook@...omium.org>
Cc: kbuild-all@...ts.01.org,
GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
linux-kernel@...r.kernel.org, Sasha Levin <sashal@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [ammarfaizi2-block:stable/linux-stable-rc/queue/5.4 1/5]
include/linux/string.h:294:33: warning: '__builtin_strncpy' output truncated
copying 8 bytes from a string of length 27
tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.4
head: e613962787e504da4b594e69c524e003c1267ebd
commit: 71b7d7ee19a794811e8a70d7407d79197f5b930f [1/5] etherdevice: Adjust ether_addr* prototypes to silence -Wstringop-overead
config: x86_64-randconfig-a015 (https://download.01.org/0day-ci/archive/20220421/202204212124.c4Cz1ERW-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
# https://github.com/ammarfaizi2/linux-block/commit/71b7d7ee19a794811e8a70d7407d79197f5b930f
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/5.4
git checkout 71b7d7ee19a794811e8a70d7407d79197f5b930f
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/nvme/target/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from include/linux/bitmap.h:9,
from include/linux/cpumask.h:12,
from arch/x86/include/asm/cpumask.h:5,
from arch/x86/include/asm/msr.h:11,
from arch/x86/include/asm/processor.h:21,
from arch/x86/include/asm/cpufeature.h:5,
from arch/x86/include/asm/thread_info.h:53,
from include/linux/thread_info.h:39,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/spinlock.h:51,
from include/linux/mmzone.h:8,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from drivers/nvme/target/discovery.c:7:
In function 'strncpy',
inlined from 'nvmet_execute_identify_disc_ctrl' at drivers/nvme/target/discovery.c:243:2:
>> include/linux/string.h:294:33: warning: '__builtin_strncpy' output truncated copying 8 bytes from a string of length 27 [-Wstringop-truncation]
294 | #define __underlying_strncpy __builtin_strncpy
| ^
include/linux/string.h:304:16: note: in expansion of macro '__underlying_strncpy'
304 | return __underlying_strncpy(p, q, size);
| ^~~~~~~~~~~~~~~~~~~~
vim +/__builtin_strncpy +294 include/linux/string.h
b008ae4cc74d3a Daniel Axtens 2020-06-03 272
b008ae4cc74d3a Daniel Axtens 2020-06-03 273 #ifdef CONFIG_KASAN
b008ae4cc74d3a Daniel Axtens 2020-06-03 274 extern void *__underlying_memchr(const void *p, int c, __kernel_size_t size) __RENAME(memchr);
b008ae4cc74d3a Daniel Axtens 2020-06-03 275 extern int __underlying_memcmp(const void *p, const void *q, __kernel_size_t size) __RENAME(memcmp);
b008ae4cc74d3a Daniel Axtens 2020-06-03 276 extern void *__underlying_memcpy(void *p, const void *q, __kernel_size_t size) __RENAME(memcpy);
b008ae4cc74d3a Daniel Axtens 2020-06-03 277 extern void *__underlying_memmove(void *p, const void *q, __kernel_size_t size) __RENAME(memmove);
b008ae4cc74d3a Daniel Axtens 2020-06-03 278 extern void *__underlying_memset(void *p, int c, __kernel_size_t size) __RENAME(memset);
b008ae4cc74d3a Daniel Axtens 2020-06-03 279 extern char *__underlying_strcat(char *p, const char *q) __RENAME(strcat);
b008ae4cc74d3a Daniel Axtens 2020-06-03 280 extern char *__underlying_strcpy(char *p, const char *q) __RENAME(strcpy);
b008ae4cc74d3a Daniel Axtens 2020-06-03 281 extern __kernel_size_t __underlying_strlen(const char *p) __RENAME(strlen);
b008ae4cc74d3a Daniel Axtens 2020-06-03 282 extern char *__underlying_strncat(char *p, const char *q, __kernel_size_t count) __RENAME(strncat);
b008ae4cc74d3a Daniel Axtens 2020-06-03 283 extern char *__underlying_strncpy(char *p, const char *q, __kernel_size_t size) __RENAME(strncpy);
b008ae4cc74d3a Daniel Axtens 2020-06-03 284 #else
b008ae4cc74d3a Daniel Axtens 2020-06-03 285 #define __underlying_memchr __builtin_memchr
b008ae4cc74d3a Daniel Axtens 2020-06-03 286 #define __underlying_memcmp __builtin_memcmp
b008ae4cc74d3a Daniel Axtens 2020-06-03 287 #define __underlying_memcpy __builtin_memcpy
b008ae4cc74d3a Daniel Axtens 2020-06-03 288 #define __underlying_memmove __builtin_memmove
b008ae4cc74d3a Daniel Axtens 2020-06-03 289 #define __underlying_memset __builtin_memset
b008ae4cc74d3a Daniel Axtens 2020-06-03 290 #define __underlying_strcat __builtin_strcat
b008ae4cc74d3a Daniel Axtens 2020-06-03 291 #define __underlying_strcpy __builtin_strcpy
b008ae4cc74d3a Daniel Axtens 2020-06-03 292 #define __underlying_strlen __builtin_strlen
b008ae4cc74d3a Daniel Axtens 2020-06-03 293 #define __underlying_strncat __builtin_strncat
b008ae4cc74d3a Daniel Axtens 2020-06-03 @294 #define __underlying_strncpy __builtin_strncpy
b008ae4cc74d3a Daniel Axtens 2020-06-03 295 #endif
b008ae4cc74d3a Daniel Axtens 2020-06-03 296
:::::: The code at line 294 was first introduced by commit
:::::: b008ae4cc74d3ab43074099746f6c32d353e01aa string.h: fix incompatibility between FORTIFY_SOURCE and KASAN
:::::: TO: Daniel Axtens <dja@...ens.net>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
--
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https://01.org/lkp
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