linux-kernel - drivers/scsi/fcoe/fcoe_ctlr.c:1871:13: warning: stack frame size (1072) exceeds limit (1024) in 'fcoe_ctlr_recv

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Message-ID: <202304291839.L1PvCRkL-lkp@intel.com>
Date:   Sat, 29 Apr 2023 18:30:19 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: drivers/scsi/fcoe/fcoe_ctlr.c:1871:13: warning: stack frame size
 (1072) exceeds limit (1024) in 'fcoe_ctlr_recv_work'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   89d77f71f493a3663b10fa812d17f472935d24be
commit: 54d9469bc515dc5fcbc20eecbe19cea868b70d68 fortify: Add run-time WARN for cross-field memcpy()
date:   8 months ago
config: riscv-randconfig-r015-20230429 (https://download.01.org/0day-ci/archive/20230429/202304291839.L1PvCRkL-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661)
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 riscv cross compiling tool for clang build
        # apt-get install binutils-riscv-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=54d9469bc515dc5fcbc20eecbe19cea868b70d68
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 54d9469bc515dc5fcbc20eecbe19cea868b70d68
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/scsi/fcoe/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304291839.L1PvCRkL-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/scsi/fcoe/fcoe_ctlr.c:1871:13: warning: stack frame size (1072) exceeds limit (1024) in 'fcoe_ctlr_recv_work' [-Wframe-larger-than]
   static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
               ^
   677/1072 (63.15%) spills, 395/1072 (36.85%) variables
   1 warning generated.


vim +/fcoe_ctlr_recv_work +1871 drivers/scsi/fcoe/fcoe_ctlr.c

97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1866  
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1867  /**
70b51aabf3b03f drivers/scsi/fcoe/libfcoe.c Robert Love 2009-11-03  1868   * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
70b51aabf3b03f drivers/scsi/fcoe/libfcoe.c Robert Love 2009-11-03  1869   * @recv_work: Handle to a FCoE controller
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1870   */
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17 @1871  static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1872  {
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1873  	struct fcoe_ctlr *fip;
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1874  	struct sk_buff *skb;
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1875  
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1876  	fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
1f4aed818d26eb drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-11-03  1877  	while ((skb = skb_dequeue(&fip->fip_recv_list)))
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1878  		fcoe_ctlr_recv_handler(fip, skb);
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1879  }
97c8389d54b966 drivers/scsi/fcoe/libfcoe.c Joe Eykholt 2009-03-17  1880  

:::::: The code at line 1871 was first introduced by commit
:::::: 97c8389d54b9665c38105ea72a428a44b97ff2f6 [SCSI] fcoe, libfcoe: Add support for FIP. FCoE discovery and keep-alive.

:::::: TO: Joe Eykholt <jeykholt@...co.com>
:::::: CC: James Bottomley <James.Bottomley@...senPartnership.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests