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Mon, 27 Jun 2022 09:15:27 +0000 Date: Mon, 27 Jun 2022 17:15:16 +0800 From: kernel test robot To: Heiko Carstens Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: include/trace/events/rcu.h:724:17: warning: 'strncpy' specified bound 8 equals destination size Message-ID: <202206271718.7yMUDJGI-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 03c765b0e3b4cb5063276b086c76f7a612856a9a commit: 334ef6ed06fa1a54e35296b77b693bcf6d63ee9e init/Kconfig: make COMPILE_TEST depend on !S390 date: 1 year, 7 months ago config: s390-buildonly-randconfig-r004-20220627 (https://download.01.org/0day-ci/archive/20220627/202206271718.7yMUDJGI-lkp@intel.com/config) compiler: s390-linux-gcc (GCC) 11.3.0 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/torvalds/linux.git/commit/?id=334ef6ed06fa1a54e35296b77b693bcf6d63ee9e git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 334ef6ed06fa1a54e35296b77b693bcf6d63ee9e # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash kernel/rcu/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): 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:724:17: warning: 'strncpy' specified bound 8 equals destination size [-Wstringop-truncation] 724 | strncpy(__entry->rcutorturename, rcutorturename, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 725 | RCUTORTURENAME_LEN); | ~~~~~~~~~~~~~~~~~~~ include/trace/perf.h:66:11: note: in definition of macro 'DECLARE_EVENT_CLASS' 66 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:30: 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:723:9: 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:724:17: warning: 'strncpy' specified bound 8 equals destination size [-Wstringop-truncation] 724 | strncpy(__entry->rcutorturename, rcutorturename, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 725 | RCUTORTURENAME_LEN); | ~~~~~~~~~~~~~~~~~~~ include/trace/trace_events.h:695:11: note: in definition of macro 'DECLARE_EVENT_CLASS' 695 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:79:30: 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:723:9: note: in expansion of macro 'TP_fast_assign' 723 | TP_fast_assign( | ^~~~~~~~~~~~~~ vim +/strncpy +724 include/trace/events/rcu.h 91afaf300269aa Paul E. McKenney 2011-10-02 709 e66c33d579ea56 Steven Rostedt (Red Hat 2013-07-12 710) TP_PROTO(const char *rcutorturename, struct rcu_head *rhp, 52494535103986 Paul E. McKenney 2012-11-14 711 unsigned long secs, unsigned long c_old, unsigned long c), 91afaf300269aa Paul E. McKenney 2011-10-02 712 52494535103986 Paul E. McKenney 2012-11-14 713 TP_ARGS(rcutorturename, rhp, secs, c_old, c), 91afaf300269aa Paul E. McKenney 2011-10-02 714 91afaf300269aa Paul E. McKenney 2011-10-02 715 TP_STRUCT__entry( b3c983142d4584 Paul E. McKenney 2017-06-06 716 __field(char, rcutorturename[RCUTORTURENAME_LEN]) 91afaf300269aa Paul E. McKenney 2011-10-02 717 __field(struct rcu_head *, rhp) 52494535103986 Paul E. McKenney 2012-11-14 718 __field(unsigned long, secs) 52494535103986 Paul E. McKenney 2012-11-14 719 __field(unsigned long, c_old) 52494535103986 Paul E. McKenney 2012-11-14 720 __field(unsigned long, c) 91afaf300269aa Paul E. McKenney 2011-10-02 721 ), 91afaf300269aa Paul E. McKenney 2011-10-02 722 91afaf300269aa Paul E. McKenney 2011-10-02 723 TP_fast_assign( b3c983142d4584 Paul E. McKenney 2017-06-06 @724 strncpy(__entry->rcutorturename, rcutorturename, b3c983142d4584 Paul E. McKenney 2017-06-06 725 RCUTORTURENAME_LEN); b3c983142d4584 Paul E. McKenney 2017-06-06 726 __entry->rcutorturename[RCUTORTURENAME_LEN - 1] = 0; 91afaf300269aa Paul E. McKenney 2011-10-02 727 __entry->rhp = rhp; 52494535103986 Paul E. McKenney 2012-11-14 728 __entry->secs = secs; 52494535103986 Paul E. McKenney 2012-11-14 729 __entry->c_old = c_old; 52494535103986 Paul E. McKenney 2012-11-14 730 __entry->c = c; 91afaf300269aa Paul E. McKenney 2011-10-02 731 ), 91afaf300269aa Paul E. McKenney 2011-10-02 732 52494535103986 Paul E. McKenney 2012-11-14 733 TP_printk("%s torture read %p %luus c: %lu %lu", 52494535103986 Paul E. McKenney 2012-11-14 734 __entry->rcutorturename, __entry->rhp, 52494535103986 Paul E. McKenney 2012-11-14 735 __entry->secs, __entry->c_old, __entry->c) 91afaf300269aa Paul E. McKenney 2011-10-02 736 ); 91afaf300269aa Paul E. McKenney 2011-10-02 737 :::::: The code at line 724 was first introduced by commit :::::: b3c983142d4584c9d506b1ed31b65f4292b4aea8 rcutorture: Place event-traced strings into trace buffer :::::: TO: Paul E. McKenney :::::: CC: Paul E. McKenney -- 0-DAY CI Kernel Test Service https://01.org/lkp