Re: [PATCH] net: xfrm: fix shift-out-of-bounce

On Wed, 28 Jul 2021 01:25:18 +0800
kernel test robot [off-list ref] wrote:

Hi Pavel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on ipsec-next/master]
[also build test ERROR on next-20210726]
[cannot apply to ipsec/master net-next/master net/master
sparc-next/master v5.14-rc3] [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]

url:
https://github.com/0day-ci/linux/commits/Pavel-Skripkin/net-xfrm-fix-shift-out-of-bounce/20210727-224549
base:
https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git
master config: s390-randconfig-r034-20210727 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
c658b472f3e61e1818e1909bf02f3d65470018a5) 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 s390 cross
compiling tool for clang build # apt-get install
binutils-s390x-linux-gnu #
https://github.com/0day-ci/linux/commit/0d1cb044926e3d81c86b5add2eeaf38c7aec7f90
git remote add linux-review https://github.com/0day-ci/linux git
fetch --no-tags linux-review
Pavel-Skripkin/net-xfrm-fix-shift-out-of-bounce/20210727-224549 git
checkout 0d1cb044926e3d81c86b5add2eeaf38c7aec7f90 # save the attached
.config to linux build tree mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross
O=build_dir ARCH=s390 SHELL=/bin/bash net/xfrm/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   In file included from net/xfrm/xfrm_user.c:22:
   In file included from include/linux/skbuff.h:31:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:464:31: warning: performing pointer
arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing
pointer arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16
__force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from
macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force
__u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded
from macro '__swab16' #define __swab16(x)
(__u16)__builtin_bswap16((__u16)(x)) ^
   In file included from net/xfrm/xfrm_user.c:22:
   In file included from include/linux/skbuff.h:31:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:490:61: warning: performing pointer
arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32
__force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from
macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force
__u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded
from macro '__swab32' #define __swab32(x)
(__u32)__builtin_bswap32((__u32)(x)) ^
   In file included from net/xfrm/xfrm_user.c:22:
   In file included from include/linux/skbuff.h:31:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:501:33: warning: performing pointer
arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing
pointer arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] __raw_writew((u16
__force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer
arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] __raw_writel((u32
__force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer
arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing
pointer arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing
pointer arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing
pointer arithmetic on a null pointer has undefined behavior
[-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer,
count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning:
performing pointer arithmetic on a null pointer has undefined
behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr,
buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21:
warning: performing pointer arithmetic on a null pointer has
undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE +
addr, buffer, count); ~~~~~~~~~~ ^

quoted

quoted

net/xfrm/xfrm_user.c:1975:54: error: expected ';' after expression

           dirmask = (1 << up->dirmask) & XFRM_POL_DEFAULT_MASK
                                                               ^
                                                               ;

Oops :) Thank you, kernel test robot.

#syz test
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master


With regards,
Pavel Skripkin