linux-kernel - mm/slub.c:3253:6: warning: stack frame size of 2640 bytes in function 'kmem_cache_free

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Date:   Mon, 3 May 2021 09:45:04 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org,
        Nathan Chancellor <natechancellor@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: mm/slub.c:3253:6: warning: stack frame size of 2640 bytes in
 function 'kmem_cache_free_bulk'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9ccce092fc64d19504fa54de4fd659e279cc92e7
commit: cdf8a76fda4ae3b53c5a09e5a8c79e27b7b65d68 ubsan: move cc-option tests into Kconfig
date:   5 months ago
config: powerpc64-randconfig-r026-20210430 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439)
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 powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cdf8a76fda4ae3b53c5a09e5a8c79e27b7b65d68
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout cdf8a76fda4ae3b53c5a09e5a8c79e27b7b65d68
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64 

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 >>):

   mm/slub.c:1503:21: warning: unused function 'kmalloc_large_node_hook' [-Wunused-function]
   static inline void *kmalloc_large_node_hook(void *ptr, size_t size, gfp_t flags)
                       ^
>> mm/slub.c:3253:6: warning: stack frame size of 2640 bytes in function 'kmem_cache_free_bulk' [-Wframe-larger-than=]
   void kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
        ^
   2 warnings generated.
--
>> drivers/gpu/drm/drm_edid.c:4998:13: warning: stack frame size of 2640 bytes in function 'drm_parse_cea_ext' [-Wframe-larger-than=]
   static void drm_parse_cea_ext(struct drm_connector *connector,
               ^
   1 warning generated.
--
>> kernel/sched/topology.c:2029:1: warning: stack frame size of 2384 bytes in function 'build_sched_domains' [-Wframe-larger-than=]
   build_sched_domains(const struct cpumask *cpu_map, struct sched_domain_attr *attr)
   ^
   1 warning generated.


vim +/kmem_cache_free_bulk +3253 mm/slub.c

d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3251  
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3252  /* Note that interrupts must be enabled when calling this function. */
376bf125ac781d Jesper Dangaard Brouer 2016-03-15 @3253  void kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3254  {
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3255  	if (WARN_ON(!size))
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3256  		return;
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3257  
d1b2cf6cb84a9b Bharata B Rao          2020-10-13  3258  	memcg_slab_free_hook(s, p, size);
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3259  	do {
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3260  		struct detached_freelist df;
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3261  
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3262  		size = build_detached_freelist(s, size, p, &df);
84582c8ab9479f Arnd Bergmann          2016-12-12  3263  		if (!df.page)
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3264  			continue;
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3265  
376bf125ac781d Jesper Dangaard Brouer 2016-03-15  3266  		slab_free(df.s, df.page, df.freelist, df.tail, df.cnt,_RET_IP_);
d0ecd894e3d5f7 Jesper Dangaard Brouer 2015-11-20  3267  	} while (likely(size));
484748f0b65a19 Christoph Lameter      2015-09-04  3268  }
484748f0b65a19 Christoph Lameter      2015-09-04  3269  EXPORT_SYMBOL(kmem_cache_free_bulk);
484748f0b65a19 Christoph Lameter      2015-09-04  3270  

:::::: The code at line 3253 was first introduced by commit
:::::: 376bf125ac781d32e202760ed7deb1ae4ed35d31 slub: clean up code for kmem cgroup support to kmem_cache_free_bulk

:::::: TO: Jesper Dangaard Brouer <brouer@...hat.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.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" (29034 bytes)