Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755500AbcLSQSs (ORCPT ); Mon, 19 Dec 2016 11:18:48 -0500 Received: from ud10.udmedia.de ([194.117.254.50]:60518 "EHLO mail.ud10.udmedia.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933713AbcLSQSZ (ORCPT ); Mon, 19 Dec 2016 11:18:25 -0500 Date: Mon, 19 Dec 2016 17:18:21 +0100 From: Markus Trippelsdorf To: linux-kernel@vger.kernel.org Cc: Arnaldo Carvalho de Melo , Ingo Molnar Subject: *** buffer overflow detected ***: /usr/src/linux/tools/perf/perf terminated Message-ID: <20161219161821.GA294@x4> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3106 Lines: 51 Running the latest kernel git tree, I get buffer overflow warnings when I try to run "perf top": *** buffer overflow detected ***: /usr/src/linux/tools/perf/perf terminated __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 51 } (gdb) bt #0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 #1 0x00007ffff5f29cbb in __GI_abort () at abort.c:89 #2 0x00007ffff5f6f553 in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7ffff6056455 "*** %s ***: %s terminated\n") at ../sysdeps/posix/libc_fatal.c:175 #3 0x00007ffff600d8c7 in __GI___fortify_fail (msg=msg@entry=0x7ffff60563ec "buffer overflow detected") at fortify_fail.c:30 #4 0x00007ffff600b790 in __GI___chk_fail () at chk_fail.c:28 #5 0x00007ffff600bc35 in __read_chk (fd=fd@entry=3, buf=buf@entry=0x7fffffff48f0, nbytes=nbytes@entry=1572864, buflen=buflen@entry=8192) at read_chk.c:30 #6 0x00000000004fafc4 in read (__nbytes=1572864, __buf=0x7fffffff48f0, __fd=3) at /usr/include/bits/unistd.h:39 #7 sysfs__read_build_id (filename=filename@entry=0x7fffffff6940 "/sys/kernel/notes", build_id=build_id@entry=0x1db5e34, size=size@entry=20) at util/symbol-elf.c:540 #8 0x00000000004a8c22 in dso__read_running_kernel_build_id (dso=dso@entry=0x1db5d70, machine=machine@entry=0x1db5ab8) at util/dso.c:1152 #9 0x00000000004b875a in machine__get_kernel (machine=machine@entry=0x1db5ab8) at util/machine.c:715 #10 0x00000000004ba0ab in machine__create_kernel_maps (machine=machine@entry=0x1db5ab8) at util/machine.c:1127 #11 0x00000000004bf169 in perf_session__create_kernel_maps (session=session@entry=0x1db59d0) at util/session.c:70 #12 0x00000000004bf43b in perf_session__new (file=file@entry=0x0, repipe=repipe@entry=false, tool=tool@entry=0x0) at util/session.c:154 #13 0x0000000000441eca in __cmd_top (top=0x7fffffff8a70) at builtin-top.c:925 #14 cmd_top (argc=, argv=, prefix=) at builtin-top.c:1330 #15 0x0000000000487481 in run_builtin (p=p@entry=0x679d78 , argc=argc@entry=2, argv=argv@entry=0x7fffffffe4c0) at perf.c:358 #16 0x0000000000487722 in handle_internal_command (argc=2, argv=0x7fffffffe4c0) at perf.c:420 #17 0x0000000000487982 in run_argv (argv=0x7fffffffe250, argcp=0x7fffffffe25c) at perf.c:466 #18 main (argc=, argv=) at perf.c:610 (gdb) up #7 sysfs__read_build_id (filename=filename@entry=0x7fffffff6940 "/sys/kernel/notes", build_id=build_id@entry=0x1db5e34, size=size@entry=20) at util/symbol-elf.c:540 540 if (read(fd, bf, n) != n) (gdb) l 535 } 536 } else if (read(fd, bf, descsz) != (ssize_t)descsz) 537 break; 538 } else { 539 int n = namesz + descsz; 540 if (read(fd, bf, n) != n) 541 break; 542 } 543 } 544 close(fd); (gdb) p n $4 = 1572864 (gdb) p BUFSIZ $5 = 8192 -- Markus