On Sat, 2018-03-17 at 03:29 +0800, kbuild test robot wrote: > Hi Benjamin, > > I love your patch! Yet something to improve: > > [auto build test ERROR on v4.16-rc4] > [also build test ERROR on next-20180316] > [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] Wow, interesting, but it looks like a false positive, or am I missing something ? > url: https://github.com/0day-ci/linux/commits/Benjamin-Herrenschmidt/usb-gadget-Add-an-EP-dispose-callback-for-EP-lifetime-tracking/20180317-004216 > config: i386-allmodconfig (attached as .config) > compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 > reproduce: > # save the attached .config to linux build tree > make ARCH=i386 > > All errors (new ones prefixed by >>): > > In file included from arch/x86/include/asm/page_32.h:35:0, > from arch/x86/include/asm/page.h:14, > from arch/x86/include/asm/thread_info.h:12, > from include/linux/thread_info.h:38, > from arch/x86/include/asm/preempt.h:7, > from include/linux/preempt.h:81, > from include/linux/spinlock.h:51, > from include/linux/seqlock.h:36, > from include/linux/time.h:6, > from include/linux/stat.h:19, > from include/linux/module.h:10, > from drivers/usb/gadget/udc/aspeed-vhub/hub.c:16: > In function 'memcpy', > inlined from 'ast_vhub_rep_desc' at drivers/usb/gadget/udc/aspeed-vhub/hub.c:276:2: > > > include/linux/string.h:341:4: error: call to '__read_overflow2' declared with attribute error: detected read beyond size of object passed as 2nd parameter > > __read_overflow2(); > ^~~~~~~~~~~~~~~~~~ > > vim +/__read_overflow2 +341 include/linux/string.h > > 6974f0c4 Daniel Micay 2017-07-12 332 > 6974f0c4 Daniel Micay 2017-07-12 333 __FORTIFY_INLINE void *memcpy(void *p, const void *q, __kernel_size_t size) > 6974f0c4 Daniel Micay 2017-07-12 334 { > 6974f0c4 Daniel Micay 2017-07-12 335 size_t p_size = __builtin_object_size(p, 0); > 6974f0c4 Daniel Micay 2017-07-12 336 size_t q_size = __builtin_object_size(q, 0); > 6974f0c4 Daniel Micay 2017-07-12 337 if (__builtin_constant_p(size)) { > 6974f0c4 Daniel Micay 2017-07-12 338 if (p_size < size) > 6974f0c4 Daniel Micay 2017-07-12 339 __write_overflow(); > 6974f0c4 Daniel Micay 2017-07-12 340 if (q_size < size) > 6974f0c4 Daniel Micay 2017-07-12 @341 __read_overflow2(); > 6974f0c4 Daniel Micay 2017-07-12 342 } > 6974f0c4 Daniel Micay 2017-07-12 343 if (p_size < size || q_size < size) > 6974f0c4 Daniel Micay 2017-07-12 344 fortify_panic(__func__); > 6974f0c4 Daniel Micay 2017-07-12 345 return __builtin_memcpy(p, q, size); > 6974f0c4 Daniel Micay 2017-07-12 346 } > 6974f0c4 Daniel Micay 2017-07-12 347 > > :::::: The code at line 341 was first introduced by commit > :::::: 6974f0c4555e285ab217cee58b6e874f776ff409 include/linux/string.h: add the option of fortified string.h functions > > :::::: TO: Daniel Micay <danielmicay@xxxxxxxxx> > :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
