fs/cifs/inode.c:2882:1: warning: stack frame size of 2096 bytes in function 'cifs_setattr'

From: kernel test robot
Date: Thu Dec 31 2020 - 19:05:27 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f6e1ea19649216156576aeafa784e3b4cee45549
commit: c6cc4c5a72505a0ecefc9b413f16bec512f38078 cifs: handle -EINTR in cifs_setattr
date: 3 months ago
config: powerpc-randconfig-r036-20210101 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 6b316febb4388764789677f81f03aff373ec35b2)
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 powerpc cross compiling tool for clang build
# apt-get install binutils-powerpc-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c6cc4c5a72505a0ecefc9b413f16bec512f38078
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout c6cc4c5a72505a0ecefc9b413f16bec512f38078
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

In file included from fs/cifs/inode.c:24:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:116:1: note: expanded from here
__do_insw
^
arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw'
#define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from fs/cifs/inode.c:24:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:118:1: note: expanded from here
__do_insl
^
arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl'
#define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from fs/cifs/inode.c:24:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:120:1: note: expanded from here
__do_outsb
^
arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb'
#define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from fs/cifs/inode.c:24:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:122:1: note: expanded from here
__do_outsw
^
arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw'
#define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from fs/cifs/inode.c:24:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:124:1: note: expanded from here
__do_outsl
^
arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl'
#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
>> fs/cifs/inode.c:2882:1: warning: stack frame size of 2096 bytes in function 'cifs_setattr' [-Wframe-larger-than=]
cifs_setattr(struct dentry *direntry, struct iattr *attrs)
^
13 warnings generated.

vim +/cifs_setattr +2882 fs/cifs/inode.c

^1da177e4c3f415 Linus Torvalds 2005-04-16 2880
0510eeb7367aca0 Jeff Layton 2008-08-02 2881 int
0510eeb7367aca0 Jeff Layton 2008-08-02 @2882 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
0510eeb7367aca0 Jeff Layton 2008-08-02 2883 {
fc64005c93090c0 Al Viro 2016-04-10 2884 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
96daf2b09178d8e Steve French 2011-05-27 2885 struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb);
c6cc4c5a72505a0 Ronnie Sahlberg 2020-10-09 2886 int rc, retries = 0;
0510eeb7367aca0 Jeff Layton 2008-08-02 2887
c6cc4c5a72505a0 Ronnie Sahlberg 2020-10-09 2888 do {
0510eeb7367aca0 Jeff Layton 2008-08-02 2889 if (pTcon->unix_ext)
c6cc4c5a72505a0 Ronnie Sahlberg 2020-10-09 2890 rc = cifs_setattr_unix(direntry, attrs);
c6cc4c5a72505a0 Ronnie Sahlberg 2020-10-09 2891 else
c6cc4c5a72505a0 Ronnie Sahlberg 2020-10-09 2892 rc = cifs_setattr_nounix(direntry, attrs);
c6cc4c5a72505a0 Ronnie Sahlberg 2020-10-09 2893 retries++;
c6cc4c5a72505a0 Ronnie Sahlberg 2020-10-09 2894 } while (is_retryable_error(rc) && retries < 2);
0510eeb7367aca0 Jeff Layton 2008-08-02 2895
0510eeb7367aca0 Jeff Layton 2008-08-02 2896 /* BB: add cifs_setattr_legacy for really old servers */
c6cc4c5a72505a0 Ronnie Sahlberg 2020-10-09 2897 return rc;
0510eeb7367aca0 Jeff Layton 2008-08-02 2898 }
0510eeb7367aca0 Jeff Layton 2008-08-02 2899

:::::: The code at line 2882 was first introduced by commit
:::::: 0510eeb7367aca017c6320d04cfd9cbc3b5dd992 turn cifs_setattr into a multiplexor that calls the correct function

:::::: TO: Jeff Layton <jlayton@xxxxxxxxxx>
:::::: CC: Steve French <sfrench@xxxxxxxxxx>

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

Attachment: .config.gz
Description: application/gzip

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