tree: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/randstruct
head: 0f9614862c554c424c7b099d2cf84a3ecd755357
commit: 0f9614862c554c424c7b099d2cf84a3ecd755357 [5/5] randstruct: Enable Clang support
config: powerpc64-allmodconfig (https://download.01.org/0day-ci/archive/20220418/[email protected]/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project ef94609d6ebe981767788e6877b0b3b731d425af)
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 powerpc64 cross compiling tool for clang build
# apt-get install binutils-powerpc64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id=0f9614862c554c424c7b099d2cf84a3ecd755357
git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git
git fetch --no-tags kees for-next/randstruct
git checkout 0f9614862c554c424c7b099d2cf84a3ecd755357
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc prepare
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>
All errors (new ones prefixed by >>):
scripts/genksyms/parse.y: warning: 9 shift/reduce conflicts [-Wconflicts-sr]
scripts/genksyms/parse.y: warning: 5 reduce/reduce conflicts [-Wconflicts-rr]
scripts/genksyms/parse.y: note: rerun with option '-Wcounterexamples' to generate conflict counterexamples
In file included from arch/powerpc/kernel/asm-offsets.c:12:
In file included from include/linux/compat.h:17:
In file included from include/linux/fs.h:33:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:10:
>> include/linux/cred.h:254:17: error: no member named 'non_rcu' in 'struct cred'
nonconst_cred->non_rcu = 0;
~~~~~~~~~~~~~ ^
include/linux/cred.h:266:17: error: no member named 'non_rcu' in 'struct cred'
nonconst_cred->non_rcu = 0;
~~~~~~~~~~~~~ ^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
In file included from include/linux/compat.h:17:
>> include/linux/fs.h:2896:17: error: no member named 'i_nlink' in 'struct inode'
return !inode->i_nlink || inode_unhashed(inode);
~~~~~ ^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
include/linux/compat.h:424:22: warning: array index 3 is past the end of the array (which contains 1 element) [-Warray-bounds]
case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
include/linux/compat.h:424:10: warning: array index 7 is past the end of the array (which contains 2 elements) [-Warray-bounds]
case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
^ ~
include/linux/compat.h:131:2: note: array 'sig' declared here
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
^
include/linux/compat.h:424:42: warning: array index 6 is past the end of the array (which contains 2 elements) [-Warray-bounds]
case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
^ ~
include/linux/compat.h:131:2: note: array 'sig' declared here
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
^
include/linux/compat.h:424:53: warning: array index 3 is past the end of the array (which contains 1 element) [-Warray-bounds]
case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
include/linux/compat.h:426:22: warning: array index 2 is past the end of the array (which contains 1 element) [-Warray-bounds]
case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
include/linux/compat.h:426:10: warning: array index 5 is past the end of the array (which contains 2 elements) [-Warray-bounds]
case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
^ ~
include/linux/compat.h:131:2: note: array 'sig' declared here
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
^
include/linux/compat.h:426:42: warning: array index 4 is past the end of the array (which contains 2 elements) [-Warray-bounds]
case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
^ ~
include/linux/compat.h:131:2: note: array 'sig' declared here
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
^
include/linux/compat.h:426:53: warning: array index 2 is past the end of the array (which contains 1 element) [-Warray-bounds]
case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
include/linux/compat.h:428:22: warning: array index 1 is past the end of the array (which contains 1 element) [-Warray-bounds]
case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:12:
include/linux/compat.h:428:10: warning: array index 3 is past the end of the array (which contains 2 elements) [-Warray-bounds]
case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
^ ~
include/linux/compat.h:131:2: note: array 'sig' declared here
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
^
include/linux/compat.h:428:42: warning: array index 2 is past the end of the array (which contains 2 elements) [-Warray-bounds]
case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
^ ~
include/linux/compat.h:131:2: note: array 'sig' declared here
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
^
include/linux/compat.h:428:53: warning: array index 1 is past the end of the array (which contains 1 element) [-Warray-bounds]
case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/powerpc/kernel/asm-offsets.c:19:
include/linux/mman.h:157:9: warning: division by zero is undefined [-Wdivision-by-zero]
_calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ) |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:136:21: note: expanded from macro '_calc_vm_trans'
: ((x) & (bit1)) / ((bit1) / (bit2))))
^ ~~~~~~~~~~~~~~~~~
include/linux/mman.h:158:9: warning: division by zero is undefined [-Wdivision-by-zero]
_calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:136:21: note: expanded from macro '_calc_vm_trans'
: ((x) & (bit1)) / ((bit1) / (bit2))))
^ ~~~~~~~~~~~~~~~~~
14 warnings and 3 errors generated.
make[2]: *** [scripts/Makefile.build:120: arch/powerpc/kernel/asm-offsets.s] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [Makefile:1195: prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:219: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +254 include/linux/cred.h
f1752eec6145c9 David Howells 2008-11-14 234
f1752eec6145c9 David Howells 2008-11-14 235 /**
f1752eec6145c9 David Howells 2008-11-14 236 * get_cred - Get a reference on a set of credentials
f1752eec6145c9 David Howells 2008-11-14 237 * @cred: The credentials to reference
f1752eec6145c9 David Howells 2008-11-14 238 *
f1752eec6145c9 David Howells 2008-11-14 239 * Get a reference on the specified set of credentials. The caller must
f06bc03339ad4c NeilBrown 2018-12-03 240 * release the reference. If %NULL is passed, it is returned with no action.
98870ab0a5a3f1 David Howells 2008-11-14 241 *
98870ab0a5a3f1 David Howells 2008-11-14 242 * This is used to deal with a committed set of credentials. Although the
98870ab0a5a3f1 David Howells 2008-11-14 243 * pointer is const, this will temporarily discard the const and increment the
98870ab0a5a3f1 David Howells 2008-11-14 244 * usage count. The purpose of this is to attempt to catch at compile time the
98870ab0a5a3f1 David Howells 2008-11-14 245 * accidental alteration of a set of credentials that should be considered
98870ab0a5a3f1 David Howells 2008-11-14 246 * immutable.
f1752eec6145c9 David Howells 2008-11-14 247 */
d84f4f992cbd76 David Howells 2008-11-14 248 static inline const struct cred *get_cred(const struct cred *cred)
f1752eec6145c9 David Howells 2008-11-14 249 {
1c388ad054fb1e Paul Menage 2009-07-17 250 struct cred *nonconst_cred = (struct cred *) cred;
f06bc03339ad4c NeilBrown 2018-12-03 251 if (!cred)
f06bc03339ad4c NeilBrown 2018-12-03 252 return cred;
e0e817392b9acf David Howells 2009-09-02 253 validate_creds(cred);
d7852fbd0f0423 Linus Torvalds 2019-07-11 @254 nonconst_cred->non_rcu = 0;
1c388ad054fb1e Paul Menage 2009-07-17 255 return get_new_cred(nonconst_cred);
f1752eec6145c9 David Howells 2008-11-14 256 }
f1752eec6145c9 David Howells 2008-11-14 257
:::::: The code at line 254 was first introduced by commit
:::::: d7852fbd0f0423937fa287a598bfde188bb68c22 access: avoid the RCU grace period for the temporary subjective credentials
:::::: TO: Linus Torvalds <[email protected]>
:::::: CC: Linus Torvalds <[email protected]>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
On Mon, Apr 18, 2022 at 02:31:31AM +0800, kernel test robot wrote:
> >> include/linux/cred.h:254:17: error: no member named 'non_rcu' in 'struct cred'
> nonconst_cred->non_rcu = 0;
> ~~~~~~~~~~~~~ ^
Thanks! This is being worked on:
https://github.com/KSPP/linux/issues/185
--
Kees Cook