linux-kernel - kernel/bpf/verifier.c:11717:5: warning: stack frame size of 1032 bytes in function 'bpf

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Date:   Thu, 21 Jan 2021 15:11:51 +0800
From:   kernel test robot <lkp@...el.com>
To:     Hao Luo <haoluo@...gle.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>
Subject: kernel/bpf/verifier.c:11717:5: warning: stack frame size of 1032
 bytes in function 'bpf_check'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9791581c049c10929e97098374dd1716a81fefcc
commit: eaa6bcb71ef6ed3dc18fc525ee7e293b06b4882b bpf: Introduce bpf_per_cpu_ptr()
date:   4 months ago
config: mips-randconfig-r003-20210121 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 22b68440e1647e16b5ee24b924986207173c02d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eaa6bcb71ef6ed3dc18fc525ee7e293b06b4882b
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout eaa6bcb71ef6ed3dc18fc525ee7e293b06b4882b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> kernel/bpf/verifier.c:11717:5: warning: stack frame size of 1032 bytes in function 'bpf_check' [-Wframe-larger-than=]
   int bpf_check(struct bpf_prog **prog, union bpf_attr *attr,
       ^
   kernel/bpf/verifier.c:9163:12: warning: stack frame size of 3688 bytes in function 'do_check' [-Wframe-larger-than=]
   static int do_check(struct bpf_verifier_env *env)
              ^
   2 warnings generated.


vim +/bpf_check +11717 kernel/bpf/verifier.c

76654e67f3a01c50 Alan Maguire  2020-09-28  11716  
838e96904ff3fc6c Yonghong Song 2018-11-19 @11717  int bpf_check(struct bpf_prog **prog, union bpf_attr *attr,

:::::: The code at line 11717 was first introduced by commit
:::::: 838e96904ff3fc6c30e5ebbc611474669856e3c0 bpf: Introduce bpf_func_info

:::::: TO: Yonghong Song <yhs@...com>
:::::: CC: Alexei Starovoitov <ast@...nel.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (22973 bytes)