From: kernel test robot <lkp@intel.com>
To: Leon Hwang <leon.hwang@linux.dev>, bpf@vger.kernel.org
Cc: oe-kbuild-all@lists.linux.dev,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
Andrii Nakryiko <andrii@kernel.org>,
Eduard Zingerman <eddyz87@gmail.com>,
Kumar Kartikeya Dwivedi <memxor@gmail.com>,
Martin KaFai Lau <martin.lau@linux.dev>,
Song Liu <song@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
Jiri Olsa <jolsa@kernel.org>,
Emil Tsalapatis <emil@etsalapatis.com>,
Ihor Solodrai <ihor.solodrai@linux.dev>,
Quentin Monnet <qmo@kernel.org>,
Shuah Khan <skhan@linuxfoundation.org>,
Leon Hwang <leon.hwang@linux.dev>,
Mykyta Yatsenko <yatsenko@meta.com>,
Avinash Duduskar <avinash.duduskar@gmail.com>,
Anton Protopopov <a.s.protopopov@gmail.com>,
Amery Hung <ameryhung@gmail.com>, Jordan Rife <jordan@jrife.io>,
Rong Tao <rongtao@cestc.cn>, Eyal Birger <eyal.birger@gmail.com>,
Pu Lehui <pulehui@huawei.com>,
Jingguo Tan <tanjingguo@huawei.com>, Lin Ma <malin89@huawei.com>,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org
Subject: Re: [PATCH bpf-next v2 14/21] bpf: Add tracing_multi link info support for bpf progs
Date: Thu, 15 Oct 2026 08:24:03 +0800 [thread overview]
Message-ID: <202610151004.s3b0Ih11-lkp@intel.com> (raw)
In-Reply-To: <20261012154024.29423-15-leon.hwang@linux.dev>
Hi Leon,
kernel test robot noticed the following build warnings:
[auto build test WARNING on bpf-next/master]
url: https://github.com/intel-lab-lkp/linux/commits/Leon-Hwang/bpf-Initialize-ftrace_managed-in-bpf_trampoline_get/20261012-234003
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link: https://lore.kernel.org/r/20261012154024.29423-15-leon.hwang%40linux.dev
patch subject: [PATCH bpf-next v2 14/21] bpf: Add tracing_multi link info support for bpf progs
config: i386-randconfig-1011-20261013 (https://download.01.org/0day-ci/archive/20261015/202610151004.s3b0Ih11-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261015/202610151004.s3b0Ih11-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/202610151004.s3b0Ih11-lkp@intel.com/
All warnings (new ones prefixed by >>):
kernel/trace/bpf_trace.c: In function 'bpf_tracing_multi_link_fill_link_info':
>> kernel/trace/bpf_trace.c:3755:32: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
3755 | addr = (u64) mnode->trampoline->func.addr;
| ^
vim +3755 kernel/trace/bpf_trace.c
3708
3709 static int bpf_tracing_multi_link_fill_link_info(const struct bpf_link *link,
3710 struct bpf_link_info *info)
3711 {
3712 u32 __user *fids = u64_to_user_ptr(info->tracing_multi.func_btf_ids);
3713 u64 __user *ucookies = u64_to_user_ptr(info->tracing_multi.cookies);
3714 u64 __user *uaddrs = u64_to_user_ptr(info->tracing_multi.addrs);
3715 u32 __user *uids = u64_to_user_ptr(info->tracing_multi.ids);
3716 struct bpf_tracing_multi_link *tr_link;
3717 u32 ucount = info->tracing_multi.count;
3718 bool has_cookies, show_addrs, has_progs;
3719 int err = 0;
3720
3721 if ((uids || ucookies || uaddrs || fids) && !ucount)
3722 return -EINVAL;
3723
3724 tr_link = container_of(link, struct bpf_tracing_multi_link, link);
3725
3726 info->tracing_multi.attach_type = tr_link->link.attach_type;
3727 info->tracing_multi.count = tr_link->nodes_cnt;
3728 info->tracing_multi.btf_obj_id = btf_obj_id(tr_link->link.prog->aux->attach_btf);
3729 has_progs = !!tr_link->tgt_progs;
3730 info->tracing_multi.flags = has_progs ? BPF_F_TRACING_MULTI_TGT_PROGS : 0;
3731
3732 if (!uids && !ucookies && !uaddrs && !fids)
3733 return 0;
3734 if (has_progs != !!fids)
3735 return -EINVAL;
3736
3737 if (ucount < tr_link->nodes_cnt)
3738 err = -ENOSPC;
3739 else
3740 ucount = tr_link->nodes_cnt;
3741
3742 has_cookies = !!tr_link->cookies;
3743 show_addrs = kallsyms_show_value(current_cred());
3744
3745 for (int i = 0; i < ucount; i++) {
3746 struct bpf_tracing_multi_node *mnode = &tr_link->nodes[i];
3747 u32 prog_id, btf_id;
3748 u64 addr, cookie;
3749
3750 bpf_trampoline_unpack_key(mnode->trampoline->key, &prog_id, &btf_id);
3751
3752 if (!show_addrs)
3753 addr = 0;
3754 else if (has_progs)
> 3755 addr = (u64) mnode->trampoline->func.addr;
3756 else
3757 addr = mnode->trampoline->ip;
3758 cookie = has_cookies ? tr_link->cookies[i] : 0;
3759
3760 if (uids && put_user(has_progs ? prog_id : btf_id, uids + i))
3761 return -EFAULT;
3762 if (uaddrs && put_user(addr, uaddrs + i))
3763 return -EFAULT;
3764 if (ucookies && put_user(cookie, ucookies + i))
3765 return -EFAULT;
3766 if (has_progs && put_user((u32) mnode->trampoline->key, fids + i))
3767 return -EFAULT;
3768
3769 cond_resched();
3770 }
3771
3772 return err;
3773 }
3774
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2026-10-15 0:25 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-12 15:40 [PATCH bpf-next v2 00/21] bpf: Add tracing_multi link support for bpf progs Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 01/21] bpf: Initialize ftrace_managed in bpf_trampoline_get() Leon Hwang
2026-10-14 21:43 ` Jiri Olsa
2026-10-12 15:40 ` [PATCH bpf-next v2 02/21] bpf: Drop unnecessary ftrace_location() in register/unregister/modify_fentry_multi() Leon Hwang
2026-10-14 21:43 ` Jiri Olsa
2026-10-12 15:40 ` [PATCH bpf-next v2 03/21] bpf, x86: Factor out bpf_arch_text_poke_prepare_insns() helper on x86_64 Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 04/21] bpf, x86: Factor out bpf_arch_text_poke_check_ip() " Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 05/21] bpf, x86: Introduce bpf_arch_text_poke_batch() " Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 06/21] bpf: Add bpf_text_poke_batch() helper in trampoline Leon Hwang
2026-10-12 16:11 ` bot+bpf-ci
2026-10-12 15:40 ` [PATCH bpf-next v2 07/21] bpf: Check tgt_prog before is_tracing_multi_id() in verifier Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 08/21] bpf: Move helpers out of CONFIG_HAVE_SINGLE_FTRACE_DIRECT_OPS guard in trampoline Leon Hwang
2026-10-12 16:11 ` bot+bpf-ci
2026-10-12 15:40 ` [PATCH bpf-next v2 09/21] bpf: Add bpf_trampoline_multi_prog_attach/detach() Leon Hwang
2026-10-12 16:16 ` sashiko-bot
2026-10-12 16:33 ` bot+bpf-ci
2026-10-14 21:43 ` Jiri Olsa
2026-10-12 15:40 ` [PATCH bpf-next v2 10/21] bpf: Shrink CONFIG_HAVE_SINGLE_FTRACE_DIRECT_OPS guard scope for bpf_tracing_multi_attach() Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 11/21] bpf: Add tracing_multi link support for bpf progs Leon Hwang
2026-10-12 16:33 ` bot+bpf-ci
2026-10-14 21:45 ` Jiri Olsa
2026-10-12 15:40 ` [PATCH bpf-next v2 12/21] libbpf: " Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 13/21] bpf: Add tracing_multi link fdinfo " Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 14/21] bpf: Add tracing_multi link info " Leon Hwang
2026-10-12 16:33 ` bot+bpf-ci
2026-10-12 16:36 ` sashiko-bot
2026-10-14 21:43 ` Jiri Olsa
2026-10-15 0:24 ` kernel test robot [this message]
2026-10-12 15:40 ` [PATCH bpf-next v2 15/21] selftests/bpf: Add tracing_multi bpf prog attach test Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 16/21] selftests/bpf: Add tracing_multi bpf prog attach failure tests Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 17/21] selftests/bpf: Add tracing_multi bpf prog cookie test Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 18/21] selftests/bpf: Add tracing_multi bpf prog rollback test Leon Hwang
2026-10-12 16:46 ` sashiko-bot
2026-10-14 21:44 ` Jiri Olsa
2026-10-12 15:40 ` [PATCH bpf-next v2 19/21] selftests/bpf: Add tracing_multi bpf prog link info test Leon Hwang
2026-10-12 16:11 ` bot+bpf-ci
2026-10-12 16:43 ` sashiko-bot
2026-10-12 15:40 ` [PATCH bpf-next v2 20/21] selftests/bpf: Test tailcall with fentry.multi Leon Hwang
2026-10-12 15:40 ` [PATCH bpf-next v2 21/21] selftests/bpf: Benchmark tracing_multi bpf progs attachment Leon Hwang
2026-10-12 16:33 ` bot+bpf-ci
2026-10-12 16:52 ` sashiko-bot
2026-10-14 21:59 ` [PATCH bpf-next v2 00/21] bpf: Add tracing_multi link support for bpf progs Jiri Olsa
2026-10-15 1:48 ` Leon Hwang
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