linux-kernel - drivers/media/dvb-frontends/nxt200x.c:1087:12: warning: stack frame size (15224) exceeds limit (8192) in 'nxt200x

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Message-ID: <202111160138.5Q4BYbAS-lkp@intel.com>
Date:   Tue, 16 Nov 2021 01:15:55 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: drivers/media/dvb-frontends/nxt200x.c:1087:12: warning: stack frame
 size (15224) exceeds limit (8192) in 'nxt200x_init'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8ab774587903771821b59471cc723bba6d893942
commit: a52f8a59aef46b59753e583bf4b28fccb069ce64 fortify: Explicitly disable Clang support
date:   7 weeks ago
config: x86_64-randconfig-r035-20211114 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dddeeafb529e769cde87bd29ef6271ac6bfa5c)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a52f8a59aef46b59753e583bf4b28fccb069ce64
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a52f8a59aef46b59753e583bf4b28fccb069ce64
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 

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 >>):

>> drivers/media/dvb-frontends/nxt200x.c:1087:12: warning: stack frame size (15224) exceeds limit (8192) in 'nxt200x_init' [-Wframe-larger-than]
   static int nxt200x_init(struct dvb_frontend* fe)
              ^
>> drivers/media/dvb-frontends/nxt200x.c:519:12: warning: stack frame size (9624) exceeds limit (8192) in 'nxt200x_setup_frontend_parameters' [-Wframe-larger-than]
   static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
              ^
   2 warnings generated.


vim +/nxt200x_init +1087 drivers/media/dvb-frontends/nxt200x.c

04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1086  
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08 @1087  static int nxt200x_init(struct dvb_frontend* fe)
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1088  {
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1089  	struct nxt200x_state* state = fe->demodulator_priv;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1090  	int ret = 0;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1091  
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1092  	if (!state->initialised) {
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1093  		switch (state->demod_chip) {
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1094  			case NXT2002:
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1095  				ret = nxt2002_init(fe);
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1096  				break;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1097  			case NXT2004:
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1098  				ret = nxt2004_init(fe);
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1099  				break;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1100  			default:
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1101  				return -EINVAL;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1102  		}
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1103  		state->initialised = 1;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1104  	}
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1105  	return ret;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1106  }
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1107  

:::::: The code at line 1087 was first introduced by commit
:::::: 04a45929e7f00ed4fc7b1d375397f808c8a5d0eb [PATCH] dvb: add nxt200x frontend module

:::::: TO: Kirk Lapray <kirk.lapray@...il.com>
:::::: CC: Linus Torvalds <torvalds@...osdl.org>

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

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