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Date: Wed, 30 Mar 2022 12:08:28 +0800
From: kernel test robot <lkp@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: kbuild-all@...ts.01.org,
"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
LKML <linux-kernel@...r.kernel.org>
Subject: [gustavoars:testing/kspp-stringop-overflow 7/7]
arch/m68k/amiga/config.c:453:56: warning: writing 1 byte into a region of
size 0
tree: https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/kspp-stringop-overflow
head: 3801f720ebf09ec3589982fba4138e83b4177fe1
commit: 3801f720ebf09ec3589982fba4138e83b4177fe1 [7/7] Makefile: Enable -Wstringop-overflow globally
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20220330/202203301238.Yblbl2iM-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 11.2.0
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/gustavoars/linux.git/commit/?id=3801f720ebf09ec3589982fba4138e83b4177fe1
git remote add gustavoars https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git
git fetch --no-tags gustavoars testing/kspp-stringop-overflow
git checkout 3801f720ebf09ec3589982fba4138e83b4177fe1
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash arch/m68k/amiga/ arch/m68k/q40/ drivers/staging/r8188eu/ sound/oss/dmasound/
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 >>):
arch/m68k/amiga/config.c: In function 'config_amiga':
>> arch/m68k/amiga/config.c:453:56: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
453 | *(unsigned char *)ZTWO_VADDR(0xde0002) |= 0x80;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
--
arch/m68k/q40/q40ints.c:84:13: warning: no previous prototype for 'q40_init_IRQ' [-Wmissing-prototypes]
84 | void __init q40_init_IRQ(void)
| ^~~~~~~~~~~~
arch/m68k/q40/q40ints.c:112:6: warning: no previous prototype for 'q40_mksound' [-Wmissing-prototypes]
112 | void q40_mksound(unsigned int hz, unsigned int ticks)
| ^~~~~~~~~~~
arch/m68k/q40/q40ints.c:152:6: warning: no previous prototype for 'q40_sched_init' [-Wmissing-prototypes]
152 | void q40_sched_init (void)
| ^~~~~~~~~~~~~~
arch/m68k/q40/q40ints.c: In function 'q40_timer_int':
>> arch/m68k/q40/q40ints.c:137:26: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
137 | *DAC_LEFT=sval;
| ~~~~~~~~~^~~~~
arch/m68k/q40/q40ints.c:138:27: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
138 | *DAC_RIGHT=sval;
| ~~~~~~~~~~^~~~~
arch/m68k/q40/q40ints.c: In function 'q40_mksound':
arch/m68k/q40/q40ints.c:120:27: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
120 | *DAC_LEFT = 128;
| ~~~~~~~~~~^~~~~
arch/m68k/q40/q40ints.c:121:28: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
121 | *DAC_RIGHT = 128;
| ~~~~~~~~~~~^~~~~
--
In file included from include/linux/string.h:20,
from include/linux/bitmap.h:11,
from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/rcupdate.h:29,
from include/linux/rculist.h:11,
from include/linux/sched/signal.h:5,
from drivers/staging/r8188eu/core/../include/osdep_service.h:7,
from drivers/staging/r8188eu/core/rtw_recv.c:6:
drivers/staging/r8188eu/core/rtw_recv.c: In function 'wlanhdr_to_ethhdr':
>> arch/m68k/include/asm/string.h:72:25: warning: '__builtin_memcpy' writing 6 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=]
72 | #define memcpy(d, s, n) __builtin_memcpy(d, s, n)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/staging/r8188eu/core/rtw_recv.c:1233:9: note: in expansion of macro 'memcpy'
1233 | memcpy(ptr + ETH_ALEN, pattrib->src, ETH_ALEN);
| ^~~~~~
>> arch/m68k/include/asm/string.h:72:25: warning: '__builtin_memcpy' writing 6 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=]
72 | #define memcpy(d, s, n) __builtin_memcpy(d, s, n)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/staging/r8188eu/core/rtw_recv.c:1233:9: note: in expansion of macro 'memcpy'
1233 | memcpy(ptr + ETH_ALEN, pattrib->src, ETH_ALEN);
| ^~~~~~
--
sound/oss/dmasound/dmasound_q40.c: In function 'Q40Silence':
>> sound/oss/dmasound/dmasound_q40.c:395:29: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
395 | *DAC_LEFT=*DAC_RIGHT=127;
| ~~~~~~~~~~^~~~
sound/oss/dmasound/dmasound_q40.c:395:18: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
395 | *DAC_LEFT=*DAC_RIGHT=127;
| ~~~~~~~~~^~~~~~~~~~~~~~~
In function 'Q40Silence',
inlined from 'Q40Init' at sound/oss/dmasound/dmasound_q40.c:530:2:
>> sound/oss/dmasound/dmasound_q40.c:395:29: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
395 | *DAC_LEFT=*DAC_RIGHT=127;
| ~~~~~~~~~~^~~~
sound/oss/dmasound/dmasound_q40.c:395:18: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
395 | *DAC_LEFT=*DAC_RIGHT=127;
| ~~~~~~~~~^~~~~~~~~~~~~~~
sound/oss/dmasound/dmasound_q40.c: In function 'Q40Interrupt':
sound/oss/dmasound/dmasound_q40.c:499:37: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
499 | *DAC_LEFT=*DAC_RIGHT=127;
| ~~~~~~~~~~^~~~
sound/oss/dmasound/dmasound_q40.c:499:26: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
499 | *DAC_LEFT=*DAC_RIGHT=127;
| ~~~~~~~~~^~~~~~~~~~~~~~~
vim +453 arch/m68k/amiga/config.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 395
50190edb2a56bb Geert Uytterhoeven 2013-10-18 396 mach_random_get_entropy = amiga_random_get_entropy;
50190edb2a56bb Geert Uytterhoeven 2013-10-18 397
0795dbcc4c4c93 Adrian Bunk 2008-07-17 398 /* Fill in the clock value (based on the 700 kHz E-Clock) */
^1da177e4c3f41 Linus Torvalds 2005-04-16 399 amiga_colorclock = 5*amiga_eclock; /* 3.5 MHz */
^1da177e4c3f41 Linus Torvalds 2005-04-16 400
^1da177e4c3f41 Linus Torvalds 2005-04-16 401 /* clear all DMA bits */
b4290a23cfa904 Al Viro 2006-01-12 402 amiga_custom.dmacon = DMAF_ALL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 403 /* ensure that the DMA master bit is set */
b4290a23cfa904 Al Viro 2006-01-12 404 amiga_custom.dmacon = DMAF_SETCLR | DMAF_MASTER;
^1da177e4c3f41 Linus Torvalds 2005-04-16 405
^1da177e4c3f41 Linus Torvalds 2005-04-16 406 /* don't use Z2 RAM as system memory on Z3 capable machines */
^1da177e4c3f41 Linus Torvalds 2005-04-16 407 if (AMIGAHW_PRESENT(ZORRO3)) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 408 int i, j;
^1da177e4c3f41 Linus Torvalds 2005-04-16 409 u32 disabled_z2mem = 0;
6ff5801acbb643 Roman Zippel 2007-05-01 410
6ff5801acbb643 Roman Zippel 2007-05-01 411 for (i = 0; i < m68k_num_memory; i++) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 412 if (m68k_memory[i].addr < 16*1024*1024) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 413 if (i == 0) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 414 /* don't cut off the branch we're sitting on */
f296401b04a6eb Fabian Frederick 2014-05-10 415 pr_warn("Warning: kernel runs in Zorro II memory\n");
^1da177e4c3f41 Linus Torvalds 2005-04-16 416 continue;
^1da177e4c3f41 Linus Torvalds 2005-04-16 417 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 418 disabled_z2mem += m68k_memory[i].size;
^1da177e4c3f41 Linus Torvalds 2005-04-16 419 m68k_num_memory--;
^1da177e4c3f41 Linus Torvalds 2005-04-16 420 for (j = i; j < m68k_num_memory; j++)
^1da177e4c3f41 Linus Torvalds 2005-04-16 421 m68k_memory[j] = m68k_memory[j+1];
^1da177e4c3f41 Linus Torvalds 2005-04-16 422 i--;
^1da177e4c3f41 Linus Torvalds 2005-04-16 423 }
6ff5801acbb643 Roman Zippel 2007-05-01 424 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 425 if (disabled_z2mem)
f296401b04a6eb Fabian Frederick 2014-05-10 426 pr_info("%dK of Zorro II memory will not be used as system memory\n",
^1da177e4c3f41 Linus Torvalds 2005-04-16 427 disabled_z2mem>>10);
^1da177e4c3f41 Linus Torvalds 2005-04-16 428 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 429
^1da177e4c3f41 Linus Torvalds 2005-04-16 430 /* request all RAM */
^1da177e4c3f41 Linus Torvalds 2005-04-16 431 for (i = 0; i < m68k_num_memory; i++) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 432 ram_resource[i].name =
^1da177e4c3f41 Linus Torvalds 2005-04-16 433 (m68k_memory[i].addr >= 0x01000000) ? "32-bit Fast RAM" :
^1da177e4c3f41 Linus Torvalds 2005-04-16 434 (m68k_memory[i].addr < 0x00c00000) ? "16-bit Fast RAM" :
^1da177e4c3f41 Linus Torvalds 2005-04-16 435 "16-bit Slow RAM";
^1da177e4c3f41 Linus Torvalds 2005-04-16 436 ram_resource[i].start = m68k_memory[i].addr;
^1da177e4c3f41 Linus Torvalds 2005-04-16 437 ram_resource[i].end = m68k_memory[i].addr+m68k_memory[i].size-1;
^1da177e4c3f41 Linus Torvalds 2005-04-16 438 request_resource(&iomem_resource, &ram_resource[i]);
^1da177e4c3f41 Linus Torvalds 2005-04-16 439 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 440
^1da177e4c3f41 Linus Torvalds 2005-04-16 441 /* initialize chipram allocator */
^1da177e4c3f41 Linus Torvalds 2005-04-16 442 amiga_chip_init();
^1da177e4c3f41 Linus Torvalds 2005-04-16 443
^1da177e4c3f41 Linus Torvalds 2005-04-16 444 /* our beloved beeper */
^1da177e4c3f41 Linus Torvalds 2005-04-16 445 if (AMIGAHW_PRESENT(AMI_AUDIO))
^1da177e4c3f41 Linus Torvalds 2005-04-16 446 amiga_init_sound();
^1da177e4c3f41 Linus Torvalds 2005-04-16 447
^1da177e4c3f41 Linus Torvalds 2005-04-16 448 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 449 * if it is an A3000, set the magic bit that forces
^1da177e4c3f41 Linus Torvalds 2005-04-16 450 * a hard rekick
^1da177e4c3f41 Linus Torvalds 2005-04-16 451 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 452 if (AMIGAHW_PRESENT(MAGIC_REKICK))
^1da177e4c3f41 Linus Torvalds 2005-04-16 @453 *(unsigned char *)ZTWO_VADDR(0xde0002) |= 0x80;
^1da177e4c3f41 Linus Torvalds 2005-04-16 454 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 455
:::::: The code at line 453 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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