Hi Kees, [auto build test ERROR on linus/master] [also build test ERROR on v4.8-rc7 next-20160920] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] [Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on] [Check https://git-scm.com/docs/git-format-patch for more information]
url: https://github.com/0day-ci/linux/commits/Kees-Cook/ratio-of-const-vs-dynamic-usercopy/20160920-130133 config: x86_64-randconfig-s2-09211158 (attached as .config) compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): cc1: warnings being treated as errors In file included from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/seqlock.h:35, from include/linux/time.h:5, from include/linux/stat.h:18, from include/linux/compat.h:12, from drivers/gpu/drm/i915/i915_ioc32.c:32: In function 'copy_from_user', inlined from 'compat_i915_getparam' at drivers/gpu/drm/i915/i915_ioc32.c:54: >> include/linux/thread_info.h:131: error: call to '__skip_check_object_size' >> declared with attribute warning: builtin-const usercopy -- cc1: warnings being treated as errors In file included from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/wait.h:8, from include/linux/fs.h:5, from include/linux/seq_file.h:10, from drivers/gpu/drm/i915/i915_debugfs.c:29: include/linux/thread_info.h: In function 'wm_latency_write': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy In function 'copy_to_user', inlined from 'i915_pipe_crc_read' at drivers/gpu/drm/i915/i915_debugfs.c:3641: >> include/linux/thread_info.h:131: error: call to '__skip_check_object_size' >> declared with attribute warning: builtin-const usercopy include/linux/thread_info.h: In function 'display_crc_ctl_write': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy include/linux/thread_info.h: In function 'i915_displayport_test_active_write': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy -- cc1: warnings being treated as errors In file included from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/rcupdate.h:38, from include/linux/idr.h:18, from include/linux/kernfs.h:14, from include/linux/sysfs.h:15, from include/linux/kobject.h:21, from include/linux/cdev.h:4, from include/drm/drmP.h:36, from drivers/gpu/drm/i915/i915_gem_execbuffer.c:29: include/linux/thread_info.h: In function 'i915_gem_execbuffer_relocate_vma': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy In function 'copy_from_user', inlined from 'i915_gem_execbuffer_relocate_slow' at drivers/gpu/drm/i915/i915_gem_execbuffer.c:872: >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy include/linux/thread_info.h: In function 'i915_gem_execbuffer_relocate_slow': >> include/linux/thread_info.h:131: error: call to '__skip_check_object_size' >> declared with attribute warning: builtin-const usercopy In function 'copy_from_user', inlined from 'i915_gem_execbuffer2' at drivers/gpu/drm/i915/i915_gem_execbuffer.c:1776: >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy include/linux/thread_info.h: In function 'i915_gem_execbuffer2': >> include/linux/thread_info.h:131: error: call to '__skip_check_object_size' >> declared with attribute warning: builtin-const usercopy In function 'copy_from_user', inlined from 'i915_gem_execbuffer' at drivers/gpu/drm/i915/i915_gem_execbuffer.c:1688: >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy include/linux/thread_info.h: In function 'i915_gem_execbuffer': >> include/linux/thread_info.h:131: error: call to '__skip_check_object_size' >> declared with attribute warning: builtin-const usercopy -- cc1: warnings being treated as errors In file included from arch/x86/include/asm/preempt.h:6, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/rcupdate.h:38, from include/linux/idr.h:18, from include/linux/kernfs.h:14, from include/linux/sysfs.h:15, from include/linux/kobject.h:21, from include/linux/cdev.h:4, from include/drm/drmP.h:36, from drivers/gpu/drm/i915/i915_gem.c:28: include/linux/thread_info.h: In function 'shmem_pread_fast': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy include/linux/thread_info.h: In function 'shmem_pwrite_slow': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy include/linux/thread_info.h: In function 'shmem_pread_slow': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy include/linux/thread_info.h: In function 'shmem_pwrite_fast': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy include/linux/thread_info.h: In function 'i915_gem_phys_pwrite': >> include/linux/thread_info.h:129: error: call to '__check_object_size' >> declared with attribute warning: dynamic usercopy vim +/__skip_check_object_size +131 include/linux/thread_info.h 123 __skip_check_object_size(void); 124 125 static __always_inline void check_object_size(const void *ptr, unsigned long n, 126 bool to_user) 127 { 128 if (!__builtin_constant_p(n)) > 129 __check_object_size(ptr, n, to_user); 130 else > 131 __skip_check_object_size(); 132 } 133 #else 134 static inline void check_object_size(const void *ptr, unsigned long n, --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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