From: kernel test robot <lkp@intel.com>
To: Ming Lei <ming.lei@redhat.com>, Jens Axboe <axboe@kernel.dk>,
io-uring@vger.kernel.org
Cc: oe-kbuild-all@lists.linux.dev,
Caleb Sander Mateos <csander@purestorage.com>,
Akilesh Kailash <akailash@google.com>,
bpf@vger.kernel.org, Alexei Starovoitov <ast@kernel.org>,
Ming Lei <ming.lei@redhat.com>
Subject: Re: [PATCH 5/5] io_uring: bpf: add io_uring_bpf_req_memcpy() kfunc
Date: Sat, 8 Nov 2025 02:51:51 +0800 [thread overview]
Message-ID: <202511080255.v8F8GrXF-lkp@intel.com> (raw)
In-Reply-To: <20251104162123.1086035-6-ming.lei@redhat.com>
Hi Ming,
kernel test robot noticed the following build warnings:
[auto build test WARNING on next-20251104]
[cannot apply to bpf-next/net bpf-next/master bpf/master linus/master v6.18-rc4 v6.18-rc3 v6.18-rc2 v6.18-rc4]
[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/Ming-Lei/io_uring-prepare-for-extending-io_uring-with-bpf/20251105-002757
base: next-20251104
patch link: https://lore.kernel.org/r/20251104162123.1086035-6-ming.lei%40redhat.com
patch subject: [PATCH 5/5] io_uring: bpf: add io_uring_bpf_req_memcpy() kfunc
config: openrisc-allyesconfig (https://download.01.org/0day-ci/archive/20251108/202511080255.v8F8GrXF-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251108/202511080255.v8F8GrXF-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/202511080255.v8F8GrXF-lkp@intel.com/
All warnings (new ones prefixed by >>):
io_uring/bpf.c: In function 'io_bpf_import_buffer':
>> io_uring/bpf.c:423:47: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
423 | return import_ubuf(direction, (void __user *)(addr + offset),
| ^
In file included from include/linux/bpf_verifier.h:7,
from io_uring/bpf.c:9:
io_uring/bpf.c: In function 'io_bpf_init':
include/linux/bpf.h:2044:50: warning: statement with no effect [-Wunused-value]
2044 | #define register_bpf_struct_ops(st_ops, type) ({ (void *)(st_ops); 0; })
| ^~~~~~~~~~~~~~~~
io_uring/bpf.c:551:15: note: in expansion of macro 'register_bpf_struct_ops'
551 | err = register_bpf_struct_ops(&bpf_uring_bpf_ops, uring_bpf_ops);
| ^~~~~~~~~~~~~~~~~~~~~~~
In file included from <command-line>:
In function 'io_kiocb_cmd_sz_check',
inlined from 'io_uring_bpf_prep' at io_uring/bpf.c:93:32:
include/linux/compiler_types.h:603:45: error: call to '__compiletime_assert_598' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
603 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:584:25: note: in definition of macro '__compiletime_assert'
584 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:603:9: note: in expansion of macro '_compiletime_assert'
603 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~~~~~~~~
include/linux/io_uring_types.h:655:9: note: in expansion of macro 'BUILD_BUG_ON'
655 | BUILD_BUG_ON(cmd_sz > sizeof(struct io_cmd_data));
| ^~~~~~~~~~~~
In function 'io_kiocb_cmd_sz_check',
inlined from 'io_uring_bpf_issue' at io_uring/bpf.c:131:32:
include/linux/compiler_types.h:603:45: error: call to '__compiletime_assert_598' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
603 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:584:25: note: in definition of macro '__compiletime_assert'
584 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:603:9: note: in expansion of macro '_compiletime_assert'
603 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~~~~~~~~
include/linux/io_uring_types.h:655:9: note: in expansion of macro 'BUILD_BUG_ON'
655 | BUILD_BUG_ON(cmd_sz > sizeof(struct io_cmd_data));
| ^~~~~~~~~~~~
In function 'io_kiocb_cmd_sz_check',
inlined from 'io_uring_bpf_fail' at io_uring/bpf.c:148:32:
include/linux/compiler_types.h:603:45: error: call to '__compiletime_assert_598' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
603 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:584:25: note: in definition of macro '__compiletime_assert'
584 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:603:9: note: in expansion of macro '_compiletime_assert'
603 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~~~~~~~~
include/linux/io_uring_types.h:655:9: note: in expansion of macro 'BUILD_BUG_ON'
655 | BUILD_BUG_ON(cmd_sz > sizeof(struct io_cmd_data));
| ^~~~~~~~~~~~
In function 'io_kiocb_cmd_sz_check',
inlined from 'io_uring_bpf_cleanup' at io_uring/bpf.c:159:32:
include/linux/compiler_types.h:603:45: error: call to '__compiletime_assert_598' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
603 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
include/linux/compiler_types.h:584:25: note: in definition of macro '__compiletime_assert'
584 | prefix ## suffix(); \
| ^~~~~~
include/linux/compiler_types.h:603:9: note: in expansion of macro '_compiletime_assert'
603 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
| ^~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
| ^~~~~~~~~~~~~~~~
include/linux/io_uring_types.h:655:9: note: in expansion of macro 'BUILD_BUG_ON'
655 | BUILD_BUG_ON(cmd_sz > sizeof(struct io_cmd_data));
| ^~~~~~~~~~~~
vim +423 io_uring/bpf.c
401
402 /*
403 * Helper to import a buffer into an iov_iter for BPF memcpy operations.
404 * Handles both plain user buffers and fixed/registered buffers.
405 *
406 * @req: io_kiocb request
407 * @iter: output iterator
408 * @buf_type: buffer type (plain or fixed)
409 * @addr: buffer address
410 * @offset: offset into buffer
411 * @len: length from offset
412 * @direction: ITER_SOURCE for source buffer, ITER_DEST for destination
413 * @issue_flags: io_uring issue flags
414 *
415 * Returns 0 on success, negative error code on failure.
416 */
417 static int io_bpf_import_buffer(struct io_kiocb *req, struct iov_iter *iter,
418 u8 buf_type, u64 addr, unsigned int offset,
419 u32 len, int direction, unsigned int issue_flags)
420 {
421 if (buf_type == IORING_BPF_BUF_TYPE_PLAIN) {
422 /* Plain user buffer */
> 423 return import_ubuf(direction, (void __user *)(addr + offset),
424 len - offset, iter);
425 } else if (buf_type == IORING_BPF_BUF_TYPE_FIXED) {
426 /* Fixed buffer */
427 return io_import_reg_buf(req, iter, addr + offset,
428 len - offset, direction, issue_flags);
429 }
430
431 return -EINVAL;
432 }
433
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2025-11-07 18:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-04 16:21 [PATCH 0/5] io_uring: add IORING_OP_BPF for extending io_uring Ming Lei
2025-11-04 16:21 ` [PATCH 1/5] io_uring: prepare for extending io_uring with bpf Ming Lei
2025-11-04 16:21 ` [PATCH 2/5] io_uring: bpf: add io_uring_ctx setup for BPF into one list Ming Lei
2025-11-04 16:21 ` [PATCH 3/5] io_uring: bpf: extend io_uring with bpf struct_ops Ming Lei
2025-11-07 19:02 ` kernel test robot
2025-11-08 6:53 ` kernel test robot
2025-11-04 16:21 ` [PATCH 4/5] io_uring: bpf: add buffer support for IORING_OP_BPF Ming Lei
2025-11-04 16:21 ` [PATCH 5/5] io_uring: bpf: add io_uring_bpf_req_memcpy() kfunc Ming Lei
2025-11-07 18:51 ` kernel test robot [this message]
2025-11-05 12:47 ` [PATCH 0/5] io_uring: add IORING_OP_BPF for extending io_uring Pavel Begunkov
2025-11-05 15:57 ` Ming Lei
2025-11-06 16:03 ` Pavel Begunkov
2025-11-07 15:54 ` Ming Lei
2025-11-11 14:07 ` Pavel Begunkov
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