Re: [PATCH v8 14/15] mm/kasan: Introduce helpers for lazy MMU mode sanitizer
From: kernel test robot
Date: Wed Oct 07 2026 - 16:35:27 EST
Hi Alexander,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on v7.3-rc6]
[cannot apply to akpm-mm/mm-everything s390/features kvms390/next next-20261006]
[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/Alexander-Gordeev/mm-introduce-hw_pte_t-for-PTE-table-storage/20261007-134144
base: linus/master
patch link: https://lore.kernel.org/r/e42d9f02ec1f8478a50fce424b95d0e7ff6a359f.1791365932.git.agordeev%40linux.ibm.com
patch subject: [PATCH v8 14/15] mm/kasan: Introduce helpers for lazy MMU mode sanitizer
config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20261008/202610080433.XoFeDwjr-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261008/202610080433.XoFeDwjr-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610080433.XoFeDwjr-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:31:
In file included from include/linux/pgtable.h:6:
In file included from arch/arm/include/asm/pgtable.h:16:
In file included from arch/arm/include/asm/pgtable-nommu.h:13:
In file included from include/linux/slab.h:276:
>> include/linux/kasan.h:430:37: error: unknown type name 'hw_pte_t'
430 | static inline void kasan_poison_pte(hw_pte_t *pte, int nr) {}
| ^
include/linux/kasan.h:431:39: error: unknown type name 'hw_pte_t'
431 | static inline void kasan_unpoison_pte(hw_pte_t *pte, int nr) {}
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
114 | return (set1->sig[3] == set2->sig[3]) &&
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:114:27: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
114 | return (set1->sig[3] == set2->sig[3]) &&
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:115:5: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
115 | (set1->sig[2] == set2->sig[2]) &&
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:115:21: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
115 | (set1->sig[2] == set2->sig[2]) &&
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:157:1: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
157 | _SIG_SET_BINOP(sigorsets, _sig_or)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:138:8: note: expanded from macro '_SIG_SET_BINOP'
138 | a3 = a->sig[3]; a2 = a->sig[2]; \
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:157:1: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
157 | _SIG_SET_BINOP(sigorsets, _sig_or)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:138:24: note: expanded from macro '_SIG_SET_BINOP'
138 | a3 = a->sig[3]; a2 = a->sig[2]; \
| ^ ~
arch/arm/include/asm/signal.h:17:2: note: array 'sig' declared here
17 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/arm/kernel/asm-offsets.c:14:
In file included from include/linux/mm.h:36:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:157:1: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
157 | _SIG_SET_BINOP(sigorsets, _sig_or)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:139:8: note: expanded from macro '_SIG_SET_BINOP'
139 | b3 = b->sig[3]; b2 = b->sig[2]; \
vim +/hw_pte_t +430 include/linux/kasan.h
420
421 static inline void kasan_unpoison_range(const void *address, size_t size) {}
422 static inline void kasan_poison_pages(struct page *page, unsigned int order,
423 bool init) {}
424 static inline bool kasan_unpoison_pages(struct page *page, unsigned int order,
425 bool init)
426 {
427 return false;
428 }
429 static inline void kasan_poison_slab(struct slab *slab) {}
> 430 static inline void kasan_poison_pte(hw_pte_t *pte, int nr) {}
431 static inline void kasan_unpoison_pte(hw_pte_t *pte, int nr) {}
432 static inline void kasan_unpoison_new_object(struct kmem_cache *cache,
433 void *object) {}
434 static inline void kasan_poison_new_object(struct kmem_cache *cache,
435 void *object) {}
436 static inline void *kasan_init_slab_obj(struct kmem_cache *cache,
437 const void *object)
438 {
439 return (void *)object;
440 }
441
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