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Paul Mundt a9ece53c40 kallsyms: fix segfault in prefix_underscores_count() 
Commit b478b782e1 "kallsyms, tracing: output
more proper symbol name" introduces a "bugfix" that introduces a segfault
in kallsyms in my configurations.

The cause is the introduction of prefix_underscores_count() which attempts
to count underscores, even in symbols that do not have them.  As a result,
it just uselessly runs past the end of the buffer until it crashes:

  CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
  KSYM    .tmp_kallsyms1.S
/bin/sh: line 1: 16934 Done                    sh-linux-gnu-nm -n .tmp_vmlinux1
     16935 Segmentation fault      | scripts/kallsyms > .tmp_kallsyms1.S
make: *** [.tmp_kallsyms1.S] Error 139

This simplifies the logic and just does a straightforward count.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Paulo Marques <pmarques@grupopie.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>		[2.6.30.x, 2.6.31.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2009-09-23 07:39:30 -07:00
..
basic trivial: kbuild: remove extraneous blank line after declaration of usage() 2009-09-21 15:14:58 +02:00
dtc powerpc: Have git ignore generated files from dtc compile 2009-06-26 14:37:23 +10:00
genksyms Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS 2009-09-23 07:39:28 -07:00
kconfig kconfig: add missing dependency of conf to localyesconfig 2009-08-21 12:42:20 -04:00
ksymoops
…
mod Fix all -Wmissing-prototypes warnings in x86 defconfig 2009-09-23 07:39:28 -07:00
package kbuild, deb-pkg: fix install scripts for posix sh 2009-07-17 23:02:57 +02:00
rt-tester
…
selinux Fix all -Wmissing-prototypes warnings in x86 defconfig 2009-09-23 07:39:28 -07:00
tracing tracing, perf: Convert the power tracer into an event tracer 2009-09-19 11:42:12 +02:00
.gitignore gitignore: ignore scripts/ihex2fw 2009-06-27 00:17:48 +02:00
Kbuild.include kbuild: use KECHO convenience echo 2008-12-03 21:32:01 +01:00
Lindent scripts/Lindent: support gnu indent v2.2.10 2008-04-29 08:06:04 -07:00
Makefile sparc: Kill PROM console driver. 2009-09-15 17:04:38 -07:00
Makefile.build kbuild: introduce subdir-ccflags-y 2009-04-19 11:12:12 +02:00
Makefile.clean kbuild: fix some minor typoes 2008-04-25 20:18:48 +02:00
Makefile.fwinst firmware: silence __fw_modbuild and __fw_modinst 'Nothing to be done' messages 2008-08-02 07:52:29 +01:00
Makefile.headersinst kbuild: fix "Argument list too long" error for "make headers_check", 2009-06-09 22:37:56 +02:00
Makefile.host kbuild: fix some minor typoes 2008-04-25 20:18:48 +02:00
Makefile.lib gcov: add gcov profiling infrastructure 2009-06-18 13:03:57 -07:00
Makefile.modinst Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
Makefile.modpost tracing: Remove markers 2009-09-18 21:22:08 +02:00
bin2c.c
…
binoffset.c
…
bloat-o-meter fix bloat-o-meter for ppc64 2007-12-17 19:28:17 -08:00
bootgraph.pl bootgraph: fix for use with dot symbols 2009-02-15 12:50:08 +01:00
checkincludes.pl
…
checkkconfigsymbols.sh kbuild: script to check for undefined Kconfig symbols 2007-10-12 21:13:50 +02:00
checkpatch.pl checkpatch: add some common Blackfin checks 2009-09-22 07:17:48 -07:00
checkstack.pl sparc: Add checkstack support 2008-10-22 21:53:49 -07:00
checksyscalls.sh asm-generic: add a generic unistd.h 2009-06-11 21:02:16 +02:00
checkversion.pl
…
cleanfile scripts: Make cleanfile/cleanpatch warn about long lines 2007-07-16 21:15:50 +02:00
cleanpatch scripts: Make cleanfile/cleanpatch warn about long lines 2007-07-16 21:15:50 +02:00
config kbuild: add generic --set-str option to scripts/config 2009-06-14 22:48:08 +02:00
conmakehash.c Fix all -Wmissing-prototypes warnings in x86 defconfig 2009-09-23 07:39:28 -07:00
decodecode scripts: improve the decodecode script 2008-12-03 22:36:39 +01:00
diffconfig kconfig: add diffconfig utility 2008-07-25 22:12:41 +02:00
export_report.pl kbuild: fix perl usage in export_report.pl 2007-10-12 21:13:50 +02:00
extract-ikconfig kconfig: have extract-ikconfig read ELF files 2009-08-18 22:00:18 -04:00
gcc-version.sh Remove bashisms from scripts 2009-06-09 22:37:54 +02:00
gcc-x86_32-has-stack-protector.sh stackprotector: fix multi-word cross-builds 2009-02-11 12:17:29 +01:00
gcc-x86_64-has-stack-protector.sh stackprotector: fix multi-word cross-builds 2009-02-11 12:17:29 +01:00
gen_initramfs_list.sh kbuild: fix spurious initramfs rebuild 2009-04-11 08:18:12 +02:00
get_maintainer.pl scripts/get_maintainer.pl: add maintainers in order listed in matched section 2009-09-22 07:17:46 -07:00
gfp-translate mm: add a gfp-translate script to help understand page allocation failure reports 2009-06-16 19:47:44 -07:00
headerdep.pl kbuild: fix option processing for -I in headerdep 2009-04-11 08:18:07 +02:00
headers.sh kbuild: clean up scripts/headers.sh 2009-06-09 22:37:43 +02:00
headers_check.pl kbuild/headers_check: refine extern check 2009-06-09 22:37:56 +02:00
headers_install.pl kbuild: in headers_install autoconvert asm/inline/volatile to __xxx__ 2009-01-02 20:43:24 +01:00
kallsyms.c kallsyms: fix segfault in prefix_underscores_count() 2009-09-23 07:39:30 -07:00
kernel-doc kernel-doc: allow multi-line declaration purpose descriptions 2009-09-18 09:48:52 -07:00
makelst kbuild: introduce ccflags-y, asflags-y and ldflags-y 2007-10-15 22:25:06 +02:00
markup_oops.pl markup_oops: fix it with 32-bit userspace on a 64-bit kernel 2009-07-29 19:10:34 -07:00
mkcompile_h kbuild: kill output in silent mode of mkcompile_h 2008-12-03 21:32:00 +01:00
mkmakefile kbuild: teach mkmakfile to be silent 2008-12-03 21:32:02 +01:00
mksysmap Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
mkuboot.sh kbuild/mkuboot.sh: allow spaces in CROSS_COMPILE 2007-05-02 20:58:10 +02:00
mkversion
…
module-common.lds linker script: throw away .discard section 2009-06-24 15:13:38 +09:00
namespace.pl x86: fixup the x86 namespace change in scripts/namespace.pl 2007-10-11 17:56:02 +02:00
patch-kernel bugfix for scripts/patch-kernel in 2.6 sublevel stepping 2008-08-06 22:11:33 +02:00
pnmtologo.c fbdev: work around old compiler bug 2009-06-30 18:55:59 -07:00
profile2linkerlist.pl
…
recordmcount.pl Merge branch 'linus' into tracing/core 2009-08-11 14:19:09 +02:00
setlocalversion kbuild: fix delay in setlocalversion on readonly source 2009-06-14 22:26:00 +02:00
show_delta
…
tags.sh kbuild: remove a tag file before it is regenerated 2009-05-01 10:54:02 +02:00
unifdef.c kbuild: fix headers_exports with boolean expression 2009-06-09 22:37:57 +02:00
ver_linux Remove bashisms from scripts 2009-06-09 22:37:54 +02:00