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Message-ID: <201703292120.wrm0eHSI%fengguang.wu@intel.com>
Date: Wed, 29 Mar 2017 21:48:01 +0800
From: kbuild test robot <lkp@...el.com>
To: Mickaël Salaün <mic@...ikod.net>
Cc: kbuild-all@...org, linux-kernel@...r.kernel.org,
Mickaël Salaün <mic@...ikod.net>,
Alexei Starovoitov <ast@...nel.org>,
Andy Lutomirski <luto@...capital.net>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Casey Schaufler <casey@...aufler-ca.com>,
Daniel Borkmann <daniel@...earbox.net>,
David Drysdale <drysdale@...gle.com>,
"David S . Miller" <davem@...emloft.net>,
"Eric W . Biederman" <ebiederm@...ssion.com>,
James Morris <james.l.morris@...cle.com>,
Jann Horn <jann@...jh.net>, Jonathan Corbet <corbet@....net>,
Matthew Garrett <mjg59@...f.ucam.org>,
Michael Kerrisk <mtk.manpages@...il.com>,
Kees Cook <keescook@...omium.org>, Paul Moore <paul@...l-moore.com>,
Sargun Dhillon <sargun@...gun.me>,
"Serge E . Hallyn" <serge@...lyn.com>,
Shuah Khan <shuah@...nel.org>, Tejun Heo <tj@...nel.org>,
Thomas Graf <tgraf@...g.ch>, Will Drewry <wad@...omium.org>,
kernel-hardening@...ts.openwall.com, linux-api@...r.kernel.org,
linux-security-module@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v6 01/11] bpf: Add eBPF program subtype and
is_valid_subtype() verifier
Hi Mickaël,
[auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Micka-l-Sala-n/Landlock-LSM-Toward-unprivileged-sandboxing/20170329-211258
config: i386-randconfig-x002-201713 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
kernel/bpf/syscall.c: In function 'bpf_prog_load':
>> kernel/bpf/syscall.c:886:25: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
size = check_user_buf((void __user *)attr->prog_subtype,
^
vim +886 kernel/bpf/syscall.c
870
871 prog->orig_prog = NULL;
872 prog->jited = 0;
873
874 atomic_set(&prog->aux->refcnt, 1);
875 prog->gpl_compatible = is_gpl ? 1 : 0;
876
877 /* find program type: socket_filter vs tracing_filter */
878 err = find_prog_type(type, prog);
879 if (err < 0)
880 goto free_prog;
881
882 /* copy eBPF program subtype from user space */
883 if (attr->prog_subtype) {
884 __u32 size;
885
> 886 size = check_user_buf((void __user *)attr->prog_subtype,
887 attr->prog_subtype_size,
888 sizeof(prog->subtype));
889 if (size < 0) {
890 err = size;
891 goto free_prog;
892 }
893 /* prog->subtype is __GFP_ZERO */
894 if (copy_from_user(&prog->subtype,
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
Download attachment ".config.gz" of type "application/gzip" (23016 bytes)
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