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Date: Thu, 6 Apr 2017 01:52:10 +0800
From: kbuild test robot <lkp@...el.com>
To: Tycho Andersen <tycho@...ker.com>
Cc: kbuild-all@...org, Daniel Borkmann <daniel@...earbox.net>,
Alexei Starovoitov <ast@...nel.org>,
Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, kernel-hardening@...ts.openwall.com,
Tycho Andersen <tycho@...ker.com>,
Mickaël Salaün <mic@...ikod.net>
Subject: Re: [PATCH] ebpf: verify the output of the JIT
Hi Tycho,
[auto build test WARNING on net/master]
[also build test WARNING on v4.11-rc5 next-20170405]
[cannot apply to tip/x86/core]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Tycho-Andersen/ebpf-verify-the-output-of-the-JIT/20170406-004746
config: x86_64-allmodconfig (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=x86_64
All warnings (new ones prefixed by >>):
arch/x86/net/bpf_jit_comp.c: In function 'do_jit':
>> arch/x86/net/bpf_jit_comp.c:1098:1: warning: the frame size of 13024 bytes is larger than 8192 bytes [-Wframe-larger-than=]
}
^
vim +1098 arch/x86/net/bpf_jit_comp.c
9383191d Daniel Borkmann 2017-02-16 1082 pr_err("bpf_jit: fatal insn size error\n");
e0ee9c12 Alexei Starovoitov 2014-10-10 1083 return -EFAULT;
e0ee9c12 Alexei Starovoitov 2014-10-10 1084 }
e0ee9c12 Alexei Starovoitov 2014-10-10 1085
0a14842f Eric Dumazet 2011-04-20 1086 if (image) {
0a14842f Eric Dumazet 2011-04-20 1087 if (unlikely(proglen + ilen > oldproglen)) {
9383191d Daniel Borkmann 2017-02-16 1088 pr_err("bpf_jit: fatal error\n");
f3c2af7b Alexei Starovoitov 2014-05-13 1089 return -EFAULT;
0a14842f Eric Dumazet 2011-04-20 1090 }
0a14842f Eric Dumazet 2011-04-20 1091 memcpy(image + proglen, temp, ilen);
0a14842f Eric Dumazet 2011-04-20 1092 }
0a14842f Eric Dumazet 2011-04-20 1093 proglen += ilen;
0a14842f Eric Dumazet 2011-04-20 1094 addrs[i] = proglen;
0a14842f Eric Dumazet 2011-04-20 1095 prog = temp;
0a14842f Eric Dumazet 2011-04-20 1096 }
f3c2af7b Alexei Starovoitov 2014-05-13 1097 return proglen;
f3c2af7b Alexei Starovoitov 2014-05-13 @1098 }
f3c2af7b Alexei Starovoitov 2014-05-13 1099
19d23b2d Tycho Andersen 2017-04-04 1100 #ifdef CONFIG_EBPF_JIT_HASH_OUTPUT
19d23b2d Tycho Andersen 2017-04-04 1101 static struct shash_desc *bpf_alloc_hash_desc(void)
19d23b2d Tycho Andersen 2017-04-04 1102 {
19d23b2d Tycho Andersen 2017-04-04 1103 struct shash_desc *hash;
19d23b2d Tycho Andersen 2017-04-04 1104 int sz = sizeof(struct shash_desc) + crypto_shash_descsize(tfm);
19d23b2d Tycho Andersen 2017-04-04 1105
19d23b2d Tycho Andersen 2017-04-04 1106 hash = kzalloc(sz, GFP_KERNEL);
:::::: The code at line 1098 was first introduced by commit
:::::: f3c2af7ba17a83809806880062c9ad541744fb95 net: filter: x86: split bpf_jit_compile()
:::::: TO: Alexei Starovoitov <ast@...mgrid.com>
:::::: CC: David S. Miller <davem@...emloft.net>
---
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