[kbuild-all] drivers/block/loop.c:1729:1: warning: the frame size of 1096 bytes is larger than 1024 bytes

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0fa8ee0d9ab95c9350b8b84574824d9a384a9f7d commit: 3448914e8cc550ba792d4ccc74471d1ca4293aae loop: Add LOOP_CONFIGURE ioctl date: 6 months ago config: arm-randconfig-r012-20201118 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 3448914e8cc550ba792d4ccc74471d1ca4293aae # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/block/loop.c: In function 'lo_ioctl': 1729 | } | ^ vim +1729 drivers/block/loop.c a13165441d58b21 Jan Kara 2018-11-08 1667 a13165441d58b21 Jan Kara 2018-11-08 1668 static int lo_ioctl(struct block_device *bdev, fmode_t mode, a13165441d58b21 Jan Kara 2018-11-08 1669 unsigned int cmd, unsigned long arg) a13165441d58b21 Jan Kara 2018-11-08 1670 { a13165441d58b21 Jan Kara 2018-11-08 1671 struct loop_device *lo = bdev->bd_disk->private_data; 571fae6e290d64a Martijn Coenen 2020-05-13 1672 void __user *argp = (void __user *) arg; a13165441d58b21 Jan Kara 2018-11-08 1673 int err; 3148ffbdb9162ba Omar Sandoval 2018-03-26 1674 ^1da177e4c3f415 Linus Torvalds 2005-04-16 1675 switch (cmd) { 3448914e8cc550b Martijn Coenen 2020-05-13 1676 case LOOP_SET_FD: { 3448914e8cc550b Martijn Coenen 2020-05-13 1677 /* 3448914e8cc550b Martijn Coenen 2020-05-13 1678 * Legacy case - pass in a zeroed out struct loop_config with 3448914e8cc550b Martijn Coenen 2020-05-13 1679 * only the file descriptor set , which corresponds with the 3448914e8cc550b Martijn Coenen 2020-05-13 1680 * default parameters we'd have used otherwise. 3448914e8cc550b Martijn Coenen 2020-05-13 1681 */ 3448914e8cc550b Martijn Coenen 2020-05-13 1682 struct loop_config config; 3448914e8cc550b Martijn Coenen 2020-05-13 1683 3448914e8cc550b Martijn Coenen 2020-05-13 1684 memset(&config, 0, sizeof(config)); 3448914e8cc550b Martijn Coenen 2020-05-13 1685 config.fd = arg; 3448914e8cc550b Martijn Coenen 2020-05-13 1686 3448914e8cc550b Martijn Coenen 2020-05-13 1687 return loop_configure(lo, mode, bdev, &config); 3448914e8cc550b Martijn Coenen 2020-05-13 1688 } 3448914e8cc550b Martijn Coenen 2020-05-13 1689 case LOOP_CONFIGURE: { 3448914e8cc550b Martijn Coenen 2020-05-13 1690 struct loop_config config; 3448914e8cc550b Martijn Coenen 2020-05-13 1691 3448914e8cc550b Martijn Coenen 2020-05-13 1692 if (copy_from_user(&config, argp, sizeof(config))) 3448914e8cc550b Martijn Coenen 2020-05-13 1693 return -EFAULT; 3448914e8cc550b Martijn Coenen 2020-05-13 1694 3448914e8cc550b Martijn Coenen 2020-05-13 1695 return loop_configure(lo, mode, bdev, &config); 3448914e8cc550b Martijn Coenen 2020-05-13 1696 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 1697 case LOOP_CHANGE_FD: c371077000f4138 Jan Kara 2018-11-08 1698 return loop_change_fd(lo, bdev, arg); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1699 case LOOP_CLR_FD: 7ccd0791d98531d Jan Kara 2018-11-08 1700 return loop_clr_fd(lo); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1701 case LOOP_SET_STATUS: 7035b5df3c071cc Dmitry Monakhov 2011-11-16 1702 err = -EPERM; a13165441d58b21 Jan Kara 2018-11-08 1703 if ((mode & FMODE_WRITE) || capable(CAP_SYS_ADMIN)) { 571fae6e290d64a Martijn Coenen 2020-05-13 1704 err = loop_set_status_old(lo, argp); a13165441d58b21 Jan Kara 2018-11-08 1705 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 1706 break; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1707 case LOOP_GET_STATUS: 571fae6e290d64a Martijn Coenen 2020-05-13 1708 return loop_get_status_old(lo, argp); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1709 case LOOP_SET_STATUS64: 7035b5df3c071cc Dmitry Monakhov 2011-11-16 1710 err = -EPERM; a13165441d58b21 Jan Kara 2018-11-08 1711 if ((mode & FMODE_WRITE) || capable(CAP_SYS_ADMIN)) { 571fae6e290d64a Martijn Coenen 2020-05-13 1712 err = loop_set_status64(lo, argp); a13165441d58b21 Jan Kara 2018-11-08 1713 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 1714 break; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1715 case LOOP_GET_STATUS64: 571fae6e290d64a Martijn Coenen 2020-05-13 1716 return loop_get_status64(lo, argp); a13165441d58b21 Jan Kara 2018-11-08 1717 case LOOP_SET_CAPACITY: ab1cb278bc70276 Ming Lei 2015-08-17 1718 case LOOP_SET_DIRECT_IO: 89e4fdecb51cf55 Omar Sandoval 2017-08-24 1719 case LOOP_SET_BLOCK_SIZE: a13165441d58b21 Jan Kara 2018-11-08 1720 if (!(mode & FMODE_WRITE) && !capable(CAP_SYS_ADMIN)) a13165441d58b21 Jan Kara 2018-11-08 1721 return -EPERM; a13165441d58b21 Jan Kara 2018-11-08 1722 /* Fall through */ ^1da177e4c3f415 Linus Torvalds 2005-04-16 1723 default: a13165441d58b21 Jan Kara 2018-11-08 1724 err = lo_simple_ioctl(lo, cmd, arg); a13165441d58b21 Jan Kara 2018-11-08 1725 break; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1726 } f028f3b2f987ebc Nikanth Karthikesan 2009-03-24 1727 ^1da177e4c3f415 Linus Torvalds 2005-04-16 1728 return err; ^1da177e4c3f415 Linus Torvalds 2005-04-16 @1729 } ^1da177e4c3f415 Linus Torvalds 2005-04-16 1730 :::::: The code at line 1729 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org