From: kernel test robot <lkp@intel.com>
To: luoqing <l1138897701@163.com>, axboe@kernel.dk
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] block: Use struct_size() helper in kmalloc()
Date: Fri, 6 Mar 2026 17:02:53 +0100 [thread overview]
Message-ID: <202603061636.1njuAoiZ-lkp@intel.com> (raw)
In-Reply-To: <20260306080056.1262324-1-l1138897701@163.com>
Hi luoqing,
kernel test robot noticed the following build errors:
[auto build test ERROR on axboe/for-next]
[also build test ERROR on device-mapper-dm/for-next linus/master v7.0-rc2 next-20260305]
[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/luoqing/dm-bufio-Use-struct_size-helper-in-kmalloc/20260306-165625
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git for-next
patch link: https://lore.kernel.org/r/20260306080056.1262324-1-l1138897701%40163.com
patch subject: [PATCH 1/2] block: Use struct_size() helper in kmalloc()
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260306/202603061636.1njuAoiZ-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260306/202603061636.1njuAoiZ-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603061636.1njuAoiZ-lkp@intel.com/
All errors (new ones prefixed by >>):
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:420:26: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:420:57: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:420:57: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:17: error: static assertion failed due to requirement '!(!(!__builtin_types_compatible_p(struct bio_vec *, struct bio_vec *)))': must be array
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:436:18: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:420:36: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/compiler.h:208:28: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^~~~~~~~~
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:421:32: note: expanded from macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:421:63: note: expanded from macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:421:63: note: expanded from macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:17: error: static assertion failed due to requirement '!(!(!__builtin_types_compatible_p(struct bio_vec *, struct bio_vec *)))': must be array
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:436:18: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:421:42: note: expanded from macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^
include/linux/compiler.h:208:28: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^~~~~~~~~
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:437:45: note: expanded from macro 'struct_size'
437 | size_add(sizeof(*(p)), flex_array_size(p, member, count)))
| ^
include/linux/overflow.h:420:26: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:437:45: note: expanded from macro 'struct_size'
437 | size_add(sizeof(*(p)), flex_array_size(p, member, count)))
| ^
include/linux/overflow.h:420:57: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:437:45: note: expanded from macro 'struct_size'
437 | size_add(sizeof(*(p)), flex_array_size(p, member, count)))
| ^
include/linux/overflow.h:420:57: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:17: error: static assertion failed due to requirement '!(!(!__builtin_types_compatible_p(struct bio_vec *, struct bio_vec *)))': must be array
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:437:26: note: expanded from macro 'struct_size'
437 | size_add(sizeof(*(p)), flex_array_size(p, member, count)))
| ^
include/linux/overflow.h:420:36: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/compiler.h:208:28: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^~~~~~~~~
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:437:45: note: expanded from macro 'struct_size'
437 | size_add(sizeof(*(p)), flex_array_size(p, member, count)))
| ^
include/linux/overflow.h:421:32: note: expanded from macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:437:45: note: expanded from macro 'struct_size'
437 | size_add(sizeof(*(p)), flex_array_size(p, member, count)))
| ^
include/linux/overflow.h:421:63: note: expanded from macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:437:45: note: expanded from macro 'struct_size'
437 | size_add(sizeof(*(p)), flex_array_size(p, member, count)))
| ^
include/linux/overflow.h:421:63: note: expanded from macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:17: error: static assertion failed due to requirement '!(!(!__builtin_types_compatible_p(struct bio_vec *, struct bio_vec *)))': must be array
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:437:26: note: expanded from macro 'struct_size'
437 | size_add(sizeof(*(p)), flex_array_size(p, member, count)))
| ^
include/linux/overflow.h:421:42: note: expanded from macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^
include/linux/compiler.h:208:28: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~
include/linux/alloc_tag.h:251:9: note: expanded from macro 'alloc_hooks_tag'
251 | typeof(_do_alloc) _res; \
| ^~~~~~~~~
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:420:26: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:255:10: note: expanded from macro 'alloc_hooks_tag'
255 | _res = _do_alloc; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:420:57: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:255:10: note: expanded from macro 'alloc_hooks_tag'
255 | _res = _do_alloc; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
>> block/bio.c:660:34: error: no member named 'bio_vec' in 'struct bio'; did you mean 'bi_io_vec'?
660 | return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
| ^~~~~~~
| bi_io_vec
include/linux/overflow.h:436:37: note: expanded from macro 'struct_size'
436 | sizeof(*(p)) + flex_array_size(p, member, count), \
| ^
include/linux/overflow.h:420:57: note: expanded from macro 'flex_array_size'
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ^
include/linux/compiler.h:208:64: note: expanded from macro '__must_be_array'
208 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \
| ^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/slab.h:956:52: note: expanded from macro 'kmalloc'
956 | #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__))
| ^
include/linux/alloc_tag.h:265:31: note: expanded from macro 'alloc_hooks'
265 | alloc_hooks_tag(&_alloc_tag, _do_alloc); \
| ^
include/linux/alloc_tag.h:255:10: note: expanded from macro 'alloc_hooks_tag'
255 | _res = _do_alloc; \
| ^
include/linux/blk_types.h:236:19: note: 'bi_io_vec' declared here
236 | struct bio_vec *bi_io_vec;
| ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
vim +660 block/bio.c
637
638 /**
639 * bio_kmalloc - kmalloc a bio
640 * @nr_vecs: number of bio_vecs to allocate
641 * @gfp_mask: the GFP_* mask given to the slab allocator
642 *
643 * Use kmalloc to allocate a bio (including bvecs). The bio must be initialized
644 * using bio_init() before use. To free a bio returned from this function use
645 * kfree() after calling bio_uninit(). A bio returned from this function can
646 * be reused by calling bio_uninit() before calling bio_init() again.
647 *
648 * Note that unlike bio_alloc() or bio_alloc_bioset() allocations from this
649 * function are not backed by a mempool can fail. Do not use this function
650 * for allocations in the file system I/O path.
651 *
652 * Returns: Pointer to new bio on success, NULL on failure.
653 */
654 struct bio *bio_kmalloc(unsigned short nr_vecs, gfp_t gfp_mask)
655 {
656 struct bio *bio;
657
658 if (nr_vecs > BIO_MAX_INLINE_VECS)
659 return NULL;
> 660 return kmalloc(struct_size(bio, bio_vec, nr_vecs), gfp_mask);
661 }
662 EXPORT_SYMBOL(bio_kmalloc);
663
--
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next prev parent reply other threads:[~2026-03-06 16:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-06 8:00 [PATCH 1/2] block: Use struct_size() helper in kmalloc() luoqing
2026-03-06 15:52 ` kernel test robot
2026-03-06 16:02 ` kernel test robot [this message]
2026-03-06 18:34 ` kernel test robot
2026-03-06 19:07 ` kernel test robot
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