Re: [PATCH] mm/kasan: Print frame description for stack bugs

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Marco,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.1 next-20190517]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Marco-Elver/mm-kasan-Print-frame-description-for-stack-bugs/20190519-040214
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 8.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=8.1.0 make.cross ARCH=xtensa 

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

All warnings (new ones prefixed by >>):

   In file included from include/linux/printk.h:7,
                    from include/linux/kernel.h:15,
                    from include/linux/kallsyms.h:10,
                    from include/linux/ftrace.h:11,
                    from mm/kasan/report.c:18:
   mm/kasan/report.c: In function 'print_decoded_frame_descr':
>> include/linux/kern_levels.h:5:18: warning: format '%zu' expects argument of type 'size_t', but argument 2 has type 'long unsigned int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^~~~~~
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^~~~~~~~
   include/linux/printk.h:304:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~
   mm/kasan/report.c:233:2: note: in expansion of macro 'pr_err'
     pr_err("this frame has %zu %s:\n", num_objects,
     ^~~~~~
   mm/kasan/report.c:233:27: note: format string is defined here
     pr_err("this frame has %zu %s:\n", num_objects,
                            ~~^
                            %lu
   In file included from include/linux/printk.h:7,
                    from include/linux/kernel.h:15,
                    from include/linux/kallsyms.h:10,
                    from include/linux/ftrace.h:11,
                    from mm/kasan/report.c:18:
>> include/linux/kern_levels.h:5:18: warning: format '%zu' expects argument of type 'size_t', but argument 2 has type 'long unsigned int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^~~~~~
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^~~~~~~~
   include/linux/printk.h:304:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~
   mm/kasan/report.c:260:3: note: in expansion of macro 'pr_err'
      pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
      ^~~~~~
   mm/kasan/report.c:260:15: note: format string is defined here
      pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
                ~~^
                %lu
   In file included from include/linux/printk.h:7,
                    from include/linux/kernel.h:15,
                    from include/linux/kallsyms.h:10,
                    from include/linux/ftrace.h:11,
                    from mm/kasan/report.c:18:
   include/linux/kern_levels.h:5:18: warning: format '%zu' expects argument of type 'size_t', but argument 3 has type 'long unsigned int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^~~~~~
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^~~~~~~~
   include/linux/printk.h:304:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~
   mm/kasan/report.c:260:3: note: in expansion of macro 'pr_err'
      pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
      ^~~~~~
   mm/kasan/report.c:260:20: note: format string is defined here
      pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
                     ~~^
                     %lu
--
   In file included from include/linux/printk.h:7,
                    from include/linux/kernel.h:15,
                    from include/linux/kallsyms.h:10,
                    from include/linux/ftrace.h:11,
                    from mm//kasan/report.c:18:
   mm//kasan/report.c: In function 'print_decoded_frame_descr':
>> include/linux/kern_levels.h:5:18: warning: format '%zu' expects argument of type 'size_t', but argument 2 has type 'long unsigned int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^~~~~~
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^~~~~~~~
   include/linux/printk.h:304:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~
   mm//kasan/report.c:233:2: note: in expansion of macro 'pr_err'
     pr_err("this frame has %zu %s:\n", num_objects,
     ^~~~~~
   mm//kasan/report.c:233:27: note: format string is defined here
     pr_err("this frame has %zu %s:\n", num_objects,
                            ~~^
                            %lu
   In file included from include/linux/printk.h:7,
                    from include/linux/kernel.h:15,
                    from include/linux/kallsyms.h:10,
                    from include/linux/ftrace.h:11,
                    from mm//kasan/report.c:18:
>> include/linux/kern_levels.h:5:18: warning: format '%zu' expects argument of type 'size_t', but argument 2 has type 'long unsigned int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^~~~~~
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^~~~~~~~
   include/linux/printk.h:304:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~
   mm//kasan/report.c:260:3: note: in expansion of macro 'pr_err'
      pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
      ^~~~~~
   mm//kasan/report.c:260:15: note: format string is defined here
      pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
                ~~^
                %lu
   In file included from include/linux/printk.h:7,
                    from include/linux/kernel.h:15,
                    from include/linux/kallsyms.h:10,
                    from include/linux/ftrace.h:11,
                    from mm//kasan/report.c:18:
   include/linux/kern_levels.h:5:18: warning: format '%zu' expects argument of type 'size_t', but argument 3 has type 'long unsigned int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^~~~~~
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^~~~~~~~
   include/linux/printk.h:304:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^~~~~~~~
   mm//kasan/report.c:260:3: note: in expansion of macro 'pr_err'
      pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
      ^~~~~~
   mm//kasan/report.c:260:20: note: format string is defined here
      pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
                     ~~^
                     %lu

vim +5 include/linux/kern_levels.h

314ba352 Joe Perches 2012-07-30  4  
04d2c8c8 Joe Perches 2012-07-30 @5  #define KERN_SOH	"\001"		/* ASCII Start Of Header */
04d2c8c8 Joe Perches 2012-07-30  6  #define KERN_SOH_ASCII	'\001'
04d2c8c8 Joe Perches 2012-07-30  7  

:::::: The code at line 5 was first introduced by commit
:::::: 04d2c8c83d0e3ac5f78aeede51babb3236200112 printk: convert the format for KERN_<LEVEL> to a 2 byte pattern

:::::: TO: Joe Perches <joe@xxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Attachment: .config.gz
Description: application/gzip


[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux