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

From: kernel test robot
Date: Thu Jan 21 2021 - 02:15:39 EST


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@xxxxxxxxx>

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@xxxxxx>
:::::: CC: Alexei Starovoitov <ast@xxxxxxxxxx>

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

Attachment: .config.gz
Description: application/gzip