linux-kernel - arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:393:28: sparse: sparse: incorrect type in argument 1 (different base types)

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Date:   Sun, 5 Jun 2022 04:58:07 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Kees Cook <keescook@...omium.org>
Subject: arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:393:28:
 sparse: sparse: incorrect type in argument 1 (different base types)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   032dcf09e2bf7c822be25b4abef7a6c913870d98
commit: 606b102876e3741851dfb09d53f3ee57f650a52c drm: fb_helper: fix CONFIG_FB dependency
date:   8 months ago
config: arm-randconfig-s031-20220605 (https://download.01.org/0day-ci/archive/20220605/202206050405.j880lgTy-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-18-g56afb504-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=606b102876e3741851dfb09d53f3ee57f650a52c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 606b102876e3741851dfb09d53f3ee57f650a52c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
   arch/arm/boot/compressed/decompress.c: note: in included file (through arch/arm/boot/compressed/../../../../lib/decompress_unxz.c):
   include/linux/decompress/mm.h:31:30: sparse: sparse: symbol 'malloc_ptr' was not declared. Should it be static?
   include/linux/decompress/mm.h:32:20: sparse: sparse: symbol 'malloc_count' was not declared. Should it be static?
   arch/arm/boot/compressed/decompress.c: note: in included file (through arch/arm/boot/compressed/../../../../lib/decompress_unxz.c):
   arch/arm/boot/compressed/decompress.c: note: in included file (through arch/arm/boot/compressed/../../../../lib/decompress_unxz.c):
>> arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:393:28: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected restricted __le32 const [usertype] *p @@     got unsigned int const [usertype] * @@
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:393:28: sparse:     expected restricted __le32 const [usertype] *p
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:393:28: sparse:     got unsigned int const [usertype] *
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:427:48: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected restricted __le32 const [usertype] *p @@     got unsigned int const [usertype] * @@
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:427:48: sparse:     expected restricted __le32 const [usertype] *p
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:427:48: sparse:     got unsigned int const [usertype] *
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:435:37: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected restricted __le32 const [usertype] *p @@     got unsigned int const [usertype] * @@
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:435:37: sparse:     expected restricted __le32 const [usertype] *p
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:435:37: sparse:     got unsigned int const [usertype] *
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:459:28: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected restricted __le32 const [usertype] *p @@     got unsigned int const [usertype] * @@
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:459:28: sparse:     expected restricted __le32 const [usertype] *p
   arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c:459:28: sparse:     got unsigned int const [usertype] *

vim +393 arch/arm/boot/compressed/../../../../lib/xz/xz_dec_stream.c

24fa0402a9b6a5 Lasse Collin 2011-01-12  385  
24fa0402a9b6a5 Lasse Collin 2011-01-12  386  /* Decode the Stream Header field (the first 12 bytes of the .xz Stream). */
24fa0402a9b6a5 Lasse Collin 2011-01-12  387  static enum xz_ret dec_stream_header(struct xz_dec *s)
24fa0402a9b6a5 Lasse Collin 2011-01-12  388  {
24fa0402a9b6a5 Lasse Collin 2011-01-12  389  	if (!memeq(s->temp.buf, HEADER_MAGIC, HEADER_MAGIC_SIZE))
24fa0402a9b6a5 Lasse Collin 2011-01-12  390  		return XZ_FORMAT_ERROR;
24fa0402a9b6a5 Lasse Collin 2011-01-12  391  
24fa0402a9b6a5 Lasse Collin 2011-01-12  392  	if (xz_crc32(s->temp.buf + HEADER_MAGIC_SIZE, 2, 0)
24fa0402a9b6a5 Lasse Collin 2011-01-12 @393  			!= get_le32(s->temp.buf + HEADER_MAGIC_SIZE + 2))
24fa0402a9b6a5 Lasse Collin 2011-01-12  394  		return XZ_DATA_ERROR;
24fa0402a9b6a5 Lasse Collin 2011-01-12  395  
24fa0402a9b6a5 Lasse Collin 2011-01-12  396  	if (s->temp.buf[HEADER_MAGIC_SIZE] != 0)
24fa0402a9b6a5 Lasse Collin 2011-01-12  397  		return XZ_OPTIONS_ERROR;
24fa0402a9b6a5 Lasse Collin 2011-01-12  398  
24fa0402a9b6a5 Lasse Collin 2011-01-12  399  	/*
24fa0402a9b6a5 Lasse Collin 2011-01-12  400  	 * Of integrity checks, we support only none (Check ID = 0) and
24fa0402a9b6a5 Lasse Collin 2011-01-12  401  	 * CRC32 (Check ID = 1). However, if XZ_DEC_ANY_CHECK is defined,
24fa0402a9b6a5 Lasse Collin 2011-01-12  402  	 * we will accept other check types too, but then the check won't
24fa0402a9b6a5 Lasse Collin 2011-01-12  403  	 * be verified and a warning (XZ_UNSUPPORTED_CHECK) will be given.
24fa0402a9b6a5 Lasse Collin 2011-01-12  404  	 */
24fa0402a9b6a5 Lasse Collin 2011-01-12  405  	s->check_type = s->temp.buf[HEADER_MAGIC_SIZE + 1];
24fa0402a9b6a5 Lasse Collin 2011-01-12  406  

:::::: The code at line 393 was first introduced by commit
:::::: 24fa0402a9b6a537e87e38341e78b7da86486846 decompressors: add XZ decompressor module

:::::: TO: Lasse Collin <lasse.collin@...aani.org>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

-- 
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