6:46 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git cet/kvm
head: e2f9808bd7530f44cd5d95332036bb660b66b8db
commit: b20ff701175a81ee3517a5f2bca5bbac90529892 [12/49] x86/mm: Update
ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to
_PAGE_COW
config: i386-randconfig-a006
(https://download.01.org/0day-ci/archive/20220217/202202171546.ctApx9Nj-lk...)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project
0bad7cb56526f2572c74449fcf97c1fcda42b41d)
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/rppt/linux.git/commit/?id...
git remote add rppt
https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git
git fetch --no-tags rppt cet/kvm
git checkout b20ff701175a81ee3517a5f2bca5bbac90529892
# 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=i386 prepare
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:33:
In file included from include/linux/pgtable.h:6:
> arch/x86/include/asm/pgtable.h:1312:13: error: invalid output
size for constraint '+a'
} while
(!try_cmpxchg(&ptep->pte, &old_pte.pte, new_pte.pte));
^
include/linux/atomic/atomic-instrumented.h:1978:2: note: expanded from macro
'try_cmpxchg'
arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro
'arch_try_cmpxchg'
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
^
arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
^
arch/x86/include/asm/cmpxchg.h:172:23: note: expanded from macro
'__raw_try_cmpxchg'
[old] "+a" (__old) \
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:33:
In file included from include/linux/pgtable.h:6:
> arch/x86/include/asm/pgtable.h:1312:13: error: invalid output
size for constraint '+a'
include/linux/atomic/atomic-instrumented.h:1978:2: note: expanded from macro
'try_cmpxchg'
arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro
'arch_try_cmpxchg'
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
^
arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
^
arch/x86/include/asm/cmpxchg.h:184:23: note: expanded from macro
'__raw_try_cmpxchg'
[old] "+a" (__old) \
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:33:
In file included from include/linux/pgtable.h:6:
> arch/x86/include/asm/pgtable.h:1312:13: error: invalid output
size for constraint '+a'
include/linux/atomic/atomic-instrumented.h:1978:2: note: expanded from macro
'try_cmpxchg'
arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro
'arch_try_cmpxchg'
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
^
arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
^
arch/x86/include/asm/cmpxchg.h:196:23: note: expanded from macro
'__raw_try_cmpxchg'
[old] "+a" (__old) \
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:33:
In file included from include/linux/pgtable.h:6:
> arch/x86/include/asm/pgtable.h:1312:13: error: invalid output
size for constraint '+a'
include/linux/atomic/atomic-instrumented.h:1978:2: note: expanded from macro
'try_cmpxchg'
arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro
'arch_try_cmpxchg'
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
^
arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
^
arch/x86/include/asm/cmpxchg.h:208:23: note: expanded from macro
'__raw_try_cmpxchg'
[old] "+a" (__old) \
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:33:
In file included from include/linux/pgtable.h:6:
arch/x86/include/asm/pgtable.h:1383:13: error: invalid output size for constraint
'+a'
} while (!try_cmpxchg(&pmdp->pmd, &old_pmd.pmd,
new_pmd.pmd));
^
include/linux/atomic/atomic-instrumented.h:1978:2: note: expanded from macro
'try_cmpxchg'
arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro
'arch_try_cmpxchg'
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
^
arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
^
arch/x86/include/asm/cmpxchg.h:172:23: note: expanded from macro
'__raw_try_cmpxchg'
[old] "+a" (__old) \
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:33:
In file included from include/linux/pgtable.h:6:
arch/x86/include/asm/pgtable.h:1383:13: error: invalid output size for constraint
'+a'
include/linux/atomic/atomic-instrumented.h:1978:2: note: expanded from macro
'try_cmpxchg'
arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro
'arch_try_cmpxchg'
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
^
arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
^
arch/x86/include/asm/cmpxchg.h:184:23: note: expanded from macro
'__raw_try_cmpxchg'
[old] "+a" (__old) \
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:33:
In file included from include/linux/pgtable.h:6:
arch/x86/include/asm/pgtable.h:1383:13: error: invalid output size for constraint
'+a'
include/linux/atomic/atomic-instrumented.h:1978:2: note: expanded from macro
'try_cmpxchg'
arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro
'arch_try_cmpxchg'
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
^
arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
^
arch/x86/include/asm/cmpxchg.h:196:23: note: expanded from macro
'__raw_try_cmpxchg'
[old] "+a" (__old) \
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:33:
In file included from include/linux/pgtable.h:6:
arch/x86/include/asm/pgtable.h:1383:13: error: invalid output size for constraint
'+a'
include/linux/atomic/atomic-instrumented.h:1978:2: note: expanded from macro
'try_cmpxchg'
arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:225:2: note: expanded from macro
'arch_try_cmpxchg'
__try_cmpxchg((ptr), (pold), (new), sizeof(*(ptr)))
^
arch/x86/include/asm/cmpxchg.h:222:2: note: expanded from macro
'__try_cmpxchg'
__raw_try_cmpxchg((ptr), (pold), (new), (size), LOCK_PREFIX)
^
arch/x86/include/asm/cmpxchg.h:208:23: note: expanded from macro
'__raw_try_cmpxchg'
[old] "+a" (__old) \
^
8 errors generated.
make[2]: *** [scripts/Makefile.build:121: arch/x86/kernel/asm-offsets.s] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [Makefile:1191: 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 +1312 arch/x86/include/asm/pgtable.h
1293
1294 #define __HAVE_ARCH_PTEP_SET_WRPROTECT
1295 static inline void ptep_set_wrprotect(struct mm_struct *mm,
1296 unsigned long addr, pte_t *ptep)
1297 {
1298 /*
1299 * If Shadow Stack is enabled, pte_wrprotect() moves _PAGE_DIRTY
1300 * to _PAGE_COW (see comments at pte_wrprotect()).
1301 * When a thread reads a RW=1, Dirty=0 PTE and before changing it
1302 * to RW=0, Dirty=0, another thread could have written to the page
1303 * and the PTE is RW=1, Dirty=1 now. Use try_cmpxchg() to detect
1304 * PTE changes and update old_pte, then try again.
1305 */
1306 if (cpu_feature_enabled(X86_FEATURE_SHSTK)) {
1307 pte_t old_pte, new_pte;
1308
1309 old_pte = READ_ONCE(*ptep);
1310 do {
1311 new_pte = pte_wrprotect(old_pte);
1312 } while (!try_cmpxchg(&ptep->pte, &old_pte.pte,
new_pte.pte));
1313
1314 return;
1315 }
1316 clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
1317 }
1318
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org