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Message-ID: <202302231040.fsntCrq0-lkp@intel.com>
Date: Thu, 23 Feb 2023 10:23:21 +0800
From: kernel test robot <lkp@...el.com>
To: Arthur Simchaev <Arthur.Simchaev@....com>,
martin.petersen@...cle.com
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
beanhuo@...ron.com, bvanassche@....org, linux-scsi@...r.kernel.org,
linux-kernel@...r.kernel.org,
Arthur Simchaev <Arthur.Simchaev@....com>
Subject: Re: [PATCH 1/2] include: uapi: scsi: Change utp_upiu_query struct
Hi Arthur,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on mkp-scsi/for-next]
[also build test WARNING on jejb-scsi/for-next linus/master next-20230222]
[cannot apply to v6.2]
[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/Arthur-Simchaev/include-uapi-scsi-Change-utp_upiu_query-struct/20230222-233738
base: https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
patch link: https://lore.kernel.org/r/1677078770-30994-2-git-send-email-Arthur.Simchaev%40wdc.com
patch subject: [PATCH 1/2] include: uapi: scsi: Change utp_upiu_query struct
config: riscv-randconfig-r025-20230222 (https://download.01.org/0day-ci/archive/20230223/202302231040.fsntCrq0-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
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 riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://github.com/intel-lab-lkp/linux/commit/b821692fde9b136903941365fae75b13d85c23c7
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Arthur-Simchaev/include-uapi-scsi-Change-utp_upiu_query-struct/20230222-233738
git checkout b821692fde9b136903941365fae75b13d85c23c7
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/ufs/core/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302231040.fsntCrq0-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/ufs/core/ufshcd.c:12:
In file included from include/linux/async.h:14:
In file included from include/linux/device.h:15:
In file included from include/linux/dev_printk.h:16:
In file included from include/linux/ratelimit.h:6:
In file included from include/linux/sched.h:14:
In file included from include/linux/pid.h:5:
In file included from include/linux/rculist.h:11:
In file included from include/linux/rcupdate.h:29:
In file included from include/linux/lockdep.h:14:
In file included from include/linux/smp.h:13:
In file included from include/linux/cpumask.h:12:
In file included from include/linux/bitmap.h:11:
In file included from include/linux/string.h:253:
>> include/linux/fortify-string.h:513:4: warning: call to '__write_overflow_field' declared with 'warning' attribute: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Wattribute-warning]
__write_overflow_field(p_size_field, size);
^
include/linux/fortify-string.h:522:4: warning: call to '__read_overflow2_field' declared with 'warning' attribute: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Wattribute-warning]
__read_overflow2_field(q_size_field, size);
^
>> include/linux/fortify-string.h:513:4: warning: call to '__write_overflow_field' declared with 'warning' attribute: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Wattribute-warning]
__write_overflow_field(p_size_field, size);
^
include/linux/fortify-string.h:522:4: warning: call to '__read_overflow2_field' declared with 'warning' attribute: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Wattribute-warning]
__read_overflow2_field(q_size_field, size);
^
4 warnings generated.
vim +513 include/linux/fortify-string.h
a28a6e860c6cf2 Francis Laniel 2021-02-25 457
f68f2ff91512c1 Kees Cook 2021-04-20 458 /*
f68f2ff91512c1 Kees Cook 2021-04-20 459 * To make sure the compiler can enforce protection against buffer overflows,
f68f2ff91512c1 Kees Cook 2021-04-20 460 * memcpy(), memmove(), and memset() must not be used beyond individual
f68f2ff91512c1 Kees Cook 2021-04-20 461 * struct members. If you need to copy across multiple members, please use
f68f2ff91512c1 Kees Cook 2021-04-20 462 * struct_group() to create a named mirror of an anonymous struct union.
f68f2ff91512c1 Kees Cook 2021-04-20 463 * (e.g. see struct sk_buff.) Read overflow checking is currently only
f68f2ff91512c1 Kees Cook 2021-04-20 464 * done when a write overflow is also present, or when building with W=1.
f68f2ff91512c1 Kees Cook 2021-04-20 465 *
f68f2ff91512c1 Kees Cook 2021-04-20 466 * Mitigation coverage matrix
f68f2ff91512c1 Kees Cook 2021-04-20 467 * Bounds checking at:
f68f2ff91512c1 Kees Cook 2021-04-20 468 * +-------+-------+-------+-------+
f68f2ff91512c1 Kees Cook 2021-04-20 469 * | Compile time | Run time |
f68f2ff91512c1 Kees Cook 2021-04-20 470 * memcpy() argument sizes: | write | read | write | read |
f68f2ff91512c1 Kees Cook 2021-04-20 471 * dest source length +-------+-------+-------+-------+
f68f2ff91512c1 Kees Cook 2021-04-20 472 * memcpy(known, known, constant) | y | y | n/a | n/a |
f68f2ff91512c1 Kees Cook 2021-04-20 473 * memcpy(known, unknown, constant) | y | n | n/a | V |
f68f2ff91512c1 Kees Cook 2021-04-20 474 * memcpy(known, known, dynamic) | n | n | B | B |
f68f2ff91512c1 Kees Cook 2021-04-20 475 * memcpy(known, unknown, dynamic) | n | n | B | V |
f68f2ff91512c1 Kees Cook 2021-04-20 476 * memcpy(unknown, known, constant) | n | y | V | n/a |
f68f2ff91512c1 Kees Cook 2021-04-20 477 * memcpy(unknown, unknown, constant) | n | n | V | V |
f68f2ff91512c1 Kees Cook 2021-04-20 478 * memcpy(unknown, known, dynamic) | n | n | V | B |
f68f2ff91512c1 Kees Cook 2021-04-20 479 * memcpy(unknown, unknown, dynamic) | n | n | V | V |
f68f2ff91512c1 Kees Cook 2021-04-20 480 * +-------+-------+-------+-------+
f68f2ff91512c1 Kees Cook 2021-04-20 481 *
f68f2ff91512c1 Kees Cook 2021-04-20 482 * y = perform deterministic compile-time bounds checking
f68f2ff91512c1 Kees Cook 2021-04-20 483 * n = cannot perform deterministic compile-time bounds checking
f68f2ff91512c1 Kees Cook 2021-04-20 484 * n/a = no run-time bounds checking needed since compile-time deterministic
f68f2ff91512c1 Kees Cook 2021-04-20 485 * B = can perform run-time bounds checking (currently unimplemented)
f68f2ff91512c1 Kees Cook 2021-04-20 486 * V = vulnerable to run-time overflow (will need refactoring to solve)
f68f2ff91512c1 Kees Cook 2021-04-20 487 *
f68f2ff91512c1 Kees Cook 2021-04-20 488 */
54d9469bc515dc Kees Cook 2021-06-24 489 __FORTIFY_INLINE bool fortify_memcpy_chk(__kernel_size_t size,
f68f2ff91512c1 Kees Cook 2021-04-20 490 const size_t p_size,
f68f2ff91512c1 Kees Cook 2021-04-20 491 const size_t q_size,
f68f2ff91512c1 Kees Cook 2021-04-20 492 const size_t p_size_field,
f68f2ff91512c1 Kees Cook 2021-04-20 493 const size_t q_size_field,
f68f2ff91512c1 Kees Cook 2021-04-20 494 const char *func)
a28a6e860c6cf2 Francis Laniel 2021-02-25 495 {
a28a6e860c6cf2 Francis Laniel 2021-02-25 496 if (__builtin_constant_p(size)) {
f68f2ff91512c1 Kees Cook 2021-04-20 497 /*
f68f2ff91512c1 Kees Cook 2021-04-20 498 * Length argument is a constant expression, so we
f68f2ff91512c1 Kees Cook 2021-04-20 499 * can perform compile-time bounds checking where
fa35198f39571b Kees Cook 2022-09-19 500 * buffer sizes are also known at compile time.
f68f2ff91512c1 Kees Cook 2021-04-20 501 */
f68f2ff91512c1 Kees Cook 2021-04-20 502
f68f2ff91512c1 Kees Cook 2021-04-20 503 /* Error when size is larger than enclosing struct. */
fa35198f39571b Kees Cook 2022-09-19 504 if (__compiletime_lessthan(p_size_field, p_size) &&
fa35198f39571b Kees Cook 2022-09-19 505 __compiletime_lessthan(p_size, size))
a28a6e860c6cf2 Francis Laniel 2021-02-25 506 __write_overflow();
fa35198f39571b Kees Cook 2022-09-19 507 if (__compiletime_lessthan(q_size_field, q_size) &&
fa35198f39571b Kees Cook 2022-09-19 508 __compiletime_lessthan(q_size, size))
a28a6e860c6cf2 Francis Laniel 2021-02-25 509 __read_overflow2();
f68f2ff91512c1 Kees Cook 2021-04-20 510
f68f2ff91512c1 Kees Cook 2021-04-20 511 /* Warn when write size argument larger than dest field. */
fa35198f39571b Kees Cook 2022-09-19 512 if (__compiletime_lessthan(p_size_field, size))
f68f2ff91512c1 Kees Cook 2021-04-20 @513 __write_overflow_field(p_size_field, size);
f68f2ff91512c1 Kees Cook 2021-04-20 514 /*
f68f2ff91512c1 Kees Cook 2021-04-20 515 * Warn for source field over-read when building with W=1
f68f2ff91512c1 Kees Cook 2021-04-20 516 * or when an over-write happened, so both can be fixed at
f68f2ff91512c1 Kees Cook 2021-04-20 517 * the same time.
f68f2ff91512c1 Kees Cook 2021-04-20 518 */
fa35198f39571b Kees Cook 2022-09-19 519 if ((IS_ENABLED(KBUILD_EXTRA_WARN1) ||
fa35198f39571b Kees Cook 2022-09-19 520 __compiletime_lessthan(p_size_field, size)) &&
fa35198f39571b Kees Cook 2022-09-19 521 __compiletime_lessthan(q_size_field, size))
f68f2ff91512c1 Kees Cook 2021-04-20 522 __read_overflow2_field(q_size_field, size);
a28a6e860c6cf2 Francis Laniel 2021-02-25 523 }
f68f2ff91512c1 Kees Cook 2021-04-20 524 /*
f68f2ff91512c1 Kees Cook 2021-04-20 525 * At this point, length argument may not be a constant expression,
f68f2ff91512c1 Kees Cook 2021-04-20 526 * so run-time bounds checking can be done where buffer sizes are
f68f2ff91512c1 Kees Cook 2021-04-20 527 * known. (This is not an "else" because the above checks may only
f68f2ff91512c1 Kees Cook 2021-04-20 528 * be compile-time warnings, and we want to still warn for run-time
f68f2ff91512c1 Kees Cook 2021-04-20 529 * overflows.)
f68f2ff91512c1 Kees Cook 2021-04-20 530 */
f68f2ff91512c1 Kees Cook 2021-04-20 531
f68f2ff91512c1 Kees Cook 2021-04-20 532 /*
f68f2ff91512c1 Kees Cook 2021-04-20 533 * Always stop accesses beyond the struct that contains the
f68f2ff91512c1 Kees Cook 2021-04-20 534 * field, when the buffer's remaining size is known.
311fb40aa0569a Kees Cook 2022-09-02 535 * (The SIZE_MAX test is to optimize away checks where the buffer
f68f2ff91512c1 Kees Cook 2021-04-20 536 * lengths are unknown.)
f68f2ff91512c1 Kees Cook 2021-04-20 537 */
311fb40aa0569a Kees Cook 2022-09-02 538 if ((p_size != SIZE_MAX && p_size < size) ||
311fb40aa0569a Kees Cook 2022-09-02 539 (q_size != SIZE_MAX && q_size < size))
f68f2ff91512c1 Kees Cook 2021-04-20 540 fortify_panic(func);
54d9469bc515dc Kees Cook 2021-06-24 541
54d9469bc515dc Kees Cook 2021-06-24 542 /*
54d9469bc515dc Kees Cook 2021-06-24 543 * Warn when writing beyond destination field size.
54d9469bc515dc Kees Cook 2021-06-24 544 *
54d9469bc515dc Kees Cook 2021-06-24 545 * We must ignore p_size_field == 0 for existing 0-element
54d9469bc515dc Kees Cook 2021-06-24 546 * fake flexible arrays, until they are all converted to
54d9469bc515dc Kees Cook 2021-06-24 547 * proper flexible arrays.
54d9469bc515dc Kees Cook 2021-06-24 548 *
9f7d69c5cd2390 Kees Cook 2022-09-19 549 * The implementation of __builtin_*object_size() behaves
54d9469bc515dc Kees Cook 2021-06-24 550 * like sizeof() when not directly referencing a flexible
54d9469bc515dc Kees Cook 2021-06-24 551 * array member, which means there will be many bounds checks
54d9469bc515dc Kees Cook 2021-06-24 552 * that will appear at run-time, without a way for them to be
54d9469bc515dc Kees Cook 2021-06-24 553 * detected at compile-time (as can be done when the destination
54d9469bc515dc Kees Cook 2021-06-24 554 * is specifically the flexible array member).
54d9469bc515dc Kees Cook 2021-06-24 555 * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101832
54d9469bc515dc Kees Cook 2021-06-24 556 */
54d9469bc515dc Kees Cook 2021-06-24 557 if (p_size_field != 0 && p_size_field != SIZE_MAX &&
54d9469bc515dc Kees Cook 2021-06-24 558 p_size != p_size_field && p_size_field < size)
54d9469bc515dc Kees Cook 2021-06-24 559 return true;
54d9469bc515dc Kees Cook 2021-06-24 560
54d9469bc515dc Kees Cook 2021-06-24 561 return false;
a28a6e860c6cf2 Francis Laniel 2021-02-25 562 }
a28a6e860c6cf2 Francis Laniel 2021-02-25 563
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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