tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4e78c578cb987725eef1cec7d11b6437109e9a49 commit: 421015713b306e47af95d4d61cdfbd96d462e4cb [1570/2472] ARM: 9017/2: Enable KASan for ARM config: arm-randconfig-r025-20201030 (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/next/linux-next.git/commit/?id=421015713b306e47af95d4d61cdfbd96d462e4cb git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 421015713b306e47af95d4d61cdfbd96d462e4cb # 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@xxxxxxxxx> All warnings (new ones prefixed by >>): mm/kasan/init.c: In function 'kasan_free_pud': >> mm/kasan/init.c:318:9: warning: variable 'pud' set but not used [-Wunused-but-set-variable] 318 | pud_t *pud; | ^~~ -- In file included from include/trace/define_trace.h:103, from include/trace/events/rcu.h:785, from kernel/rcu/rcu.h:13, from kernel/rcu/update.c:49: include/trace/events/rcu.h: In function 'perf_trace_rcu_torture_read': >> include/trace/events/rcu.h:724:3: warning: 'strncpy' specified bound 8 equals destination size [-Wstringop-truncation] 724 | strncpy(__entry->rcutorturename, rcutorturename, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 725 | RCUTORTURENAME_LEN); | ~~~~~~~~~~~~~~~~~~~ include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS' 66 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:9: note: in expansion of macro 'PARAMS' 79 | PARAMS(assign), \ | ^~~~~~ include/trace/events/rcu.h:11:25: note: in expansion of macro 'TRACE_EVENT' 11 | #define TRACE_EVENT_RCU TRACE_EVENT | ^~~~~~~~~~~ include/trace/events/rcu.h:723:2: note: in expansion of macro 'TP_fast_assign' 723 | TP_fast_assign( | ^~~~~~~~~~~~~~ In file included from include/trace/define_trace.h:102, from include/trace/events/rcu.h:785, from kernel/rcu/rcu.h:13, from kernel/rcu/update.c:49: include/trace/events/rcu.h: In function 'trace_event_raw_event_rcu_torture_read': >> include/trace/events/rcu.h:724:3: warning: 'strncpy' specified bound 8 equals destination size [-Wstringop-truncation] 724 | strncpy(__entry->rcutorturename, rcutorturename, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 725 | RCUTORTURENAME_LEN); | ~~~~~~~~~~~~~~~~~~~ include/trace/trace_events.h:695:4: note: in definition of macro 'DECLARE_EVENT_CLASS' 695 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:9: note: in expansion of macro 'PARAMS' 79 | PARAMS(assign), \ | ^~~~~~ include/trace/events/rcu.h:11:25: note: in expansion of macro 'TRACE_EVENT' 11 | #define TRACE_EVENT_RCU TRACE_EVENT | ^~~~~~~~~~~ include/trace/events/rcu.h:723:2: note: in expansion of macro 'TP_fast_assign' 723 | TP_fast_assign( | ^~~~~~~~~~~~~~ -- In file included from include/trace/define_trace.h:103, from include/trace/events/fscache.h:533, from fs/fscache/internal.h:28, from fs/fscache/main.c:16: include/trace/events/fscache.h: In function 'perf_trace_fscache_netfs': >> include/trace/events/fscache.h:208:7: warning: 'strncpy' specified bound 8 equals destination size [-Wstringop-truncation] 208 | strncpy(__entry->name, netfs->name, 8); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/trace/perf.h:66:4: note: in definition of macro 'DECLARE_EVENT_CLASS' 66 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:9: note: in expansion of macro 'PARAMS' 79 | PARAMS(assign), \ | ^~~~~~ include/trace/events/fscache.h:196:1: note: in expansion of macro 'TRACE_EVENT' 196 | TRACE_EVENT(fscache_netfs, | ^~~~~~~~~~~ include/trace/events/fscache.h:206:6: note: in expansion of macro 'TP_fast_assign' 206 | TP_fast_assign( | ^~~~~~~~~~~~~~ In file included from include/trace/define_trace.h:102, from include/trace/events/fscache.h:533, from fs/fscache/internal.h:28, from fs/fscache/main.c:16: include/trace/events/fscache.h: In function 'trace_event_raw_event_fscache_netfs': >> include/trace/events/fscache.h:208:7: warning: 'strncpy' specified bound 8 equals destination size [-Wstringop-truncation] 208 | strncpy(__entry->name, netfs->name, 8); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/trace/trace_events.h:695:4: note: in definition of macro 'DECLARE_EVENT_CLASS' 695 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:9: note: in expansion of macro 'PARAMS' 79 | PARAMS(assign), \ | ^~~~~~ include/trace/events/fscache.h:196:1: note: in expansion of macro 'TRACE_EVENT' 196 | TRACE_EVENT(fscache_netfs, | ^~~~~~~~~~~ include/trace/events/fscache.h:206:6: note: in expansion of macro 'TP_fast_assign' 206 | TP_fast_assign( | ^~~~~~~~~~~~~~ vim +/pud +318 mm/kasan/init.c 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 315 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 316 static void kasan_free_pud(pud_t *pud_start, p4d_t *p4d) 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 317 { 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 @318 pud_t *pud; 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 319 int i; 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 320 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 321 for (i = 0; i < PTRS_PER_PUD; i++) { 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 322 pud = pud_start + i; 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 323 if (!pud_none(*pud)) 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 324 return; 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 325 } 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 326 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 327 pud_free(&init_mm, (pud_t *)page_to_virt(p4d_page(*p4d))); 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 328 p4d_clear(p4d); 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 329 } 0207df4fa1a8692 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 330 :::::: The code at line 318 was first introduced by commit :::::: 0207df4fa1a869281ddbf72db6203dbf036b3e1a kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN :::::: TO: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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