Xiaochen Wang e0a04b11e4 scripts/kallsyms.c: fix potential segfault ... Description: This bug hardly appears during real kernel compiling, because the vmlinux symbols table is huge. But we can still catch it under strict condition , as follows. $ echo "c101b97b T do_fork" | ./scripts/kallsyms --all-symbols #include <asm/types.h> ...... ...... .globl kallsyms_token_table ALGN kallsyms_token_table: Segmentation fault (core dumped) $ If symbols table is small, all entries in token_profit[0x10000] may decrease to 0 after several calls of compress_symbols() in optimize_result(). In that case, find_best_token() always return 0 and best_table[i] is set to "\0\0" and best_table_len[i] is set to 2. As a result, expand_symbol(best_table[0]="\0\0", best_table_len[0]=2, buf) in write_src() will run in infinite recursion until stack overflows, causing segfault. This patch checks the find_best_token() return value. If all entries in token_profit[0x10000] become 0 according to return value, it breaks the loop in optimize_result(). And expand_symbol() works well when best_table_len[i] is 0. Signed-off-by: Xiaochen Wang <wangxiaochen0@gmail.com> Acked-by: Paulo Marques <pmarques@grupopie.com> Signed-off-by: Michal Marek <mmarek@suse.cz>		2011-05-12 17:23:40 +02:00
..
basic	kbuild: move scripts/basic/docproc.c to scripts/docproc.c	2011-05-02 22:48:03 +02:00
coccinelle	scripts/coccinelle: update for compatability with Coccinelle 0.2.4	2010-12-03 12:27:01 +01:00
dtc	of/flattree: Update dtc to current mainline.	2011-01-03 16:02:49 -07:00
genksyms	genksyms: Regenerate lexer and parser	2011-03-17 15:13:56 +01:00
kconfig	trivial: Fix Steven's Copyright typos	2011-02-08 17:14:31 -05:00
ksymoops
mod	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6	2011-03-21 15:55:26 -07:00
package	kbuild: Add make tarxz-pkg build option	2011-03-09 16:18:06 +01:00
rt-tester	rtmutex: tester: Remove the remaining BKL leftovers	2011-02-22 22:07:22 +01:00
selinux	SELinux: Auto-generate security_is_socket_class	2011-03-03 15:19:43 -05:00
tracing	tracing, perf: Convert the power tracer into an event tracer	2009-09-19 11:42:12 +02:00
.gitignore	kbuild: move scripts/basic/docproc.c to scripts/docproc.c	2011-05-02 22:48:03 +02:00
bin2c.c
bloat-o-meter	bloat-o-meter: include read-only data section in report	2011-03-22 17:44:17 -07:00
bootgraph.pl	bootgraph: fix for use with dot symbols	2009-02-15 12:50:08 +01:00
checkincludes.pl	checkincludes: fix perlcritic warnings	2010-03-07 21:19:57 +01:00
checkkconfigsymbols.sh	checkkconfigsymbols.sh: Kconfig symbols sometimes have lowercase letters	2010-06-03 10:39:39 +02:00
checkpatch.pl	checkpatch: warn about memset with swapped arguments	2011-03-22 17:44:15 -07:00
checkstack.pl	scripts: improve checkstack	2010-03-07 21:19:09 +01:00
checksyscalls.sh	checksyscalls: Fix stand-alone usage	2010-12-20 15:40:33 +01:00
checkversion.pl	checkversion: perl cleanup	2010-03-07 21:22:56 +01:00
cleanfile
cleanpatch
coccicheck	Coccinelle: Add contextual message	2010-10-28 00:32:23 +02:00
config	kbuild: add numeric --set-val option to scripts/config	2010-12-15 15:44:31 +01:00
conmakehash.c	Fix all -Wmissing-prototypes warnings in x86 defconfig	2009-09-23 07:39:28 -07:00
decodecode	scripts: decodecode: remove bashisms	2010-06-04 10:26:35 +02:00
diffconfig
docproc.c	kbuild: move scripts/basic/docproc.c to scripts/docproc.c	2011-05-02 22:48:03 +02:00
export_report.pl	export_report: fix perl warnings	2010-03-07 21:41:04 +01:00
extract-ikconfig	scripts/extract-ikconfig: add xz compression support	2011-02-10 15:23:03 +01:00
gcc-goto.sh	jump label: Fix GCC feature check when distcc is used	2010-09-24 09:12:25 +02:00
gcc-version.sh	Remove bashisms from scripts	2009-06-09 22:37:54 +02:00
gcc-x86_32-has-stack-protector.sh
gcc-x86_64-has-stack-protector.sh
gen_initramfs_list.sh	scripts/gen_initramfs_list.sh: Convert to a /bin/sh script	2011-05-12 16:48:39 +02:00
get_maintainer.pl	get_maintainer.pl: allow "K:" pattern tests to match non-patch text	2011-03-22 17:44:13 -07:00
gfp-translate	scripts: fix gfp-translate for recent changes to gfp.h	2010-11-25 06:50:49 +09:00
headerdep.pl	headerdep: perlcritic warning	2010-03-23 12:26:38 +01:00
headers.sh	kbuild: introduce HDR_ARCH_LIST for headers_install_all	2010-12-14 22:16:19 +01:00
headers_check.pl	headers_check: Fix warning text	2010-12-14 17:05:08 +01:00
headers_install.pl	headers_install: check exit status of unifdef	2010-12-14 15:06:04 +01:00
kallsyms.c	scripts/kallsyms.c: fix potential segfault	2011-05-12 17:23:40 +02:00
Kbuild.include	kbuild: Fix passing -Wno-* options to gcc 4.4+	2011-05-03 10:50:54 +02:00
kernel-doc	kernel-doc: code reorganization	2011-01-06 09:59:38 -08:00
Lindent
Makefile	kbuild: move scripts/basic/docproc.c to scripts/docproc.c	2011-05-02 22:48:03 +02:00
Makefile.asm-generic	kbuild: Fix Makefile.asm-generic for um	2011-05-02 22:31:34 +02:00
Makefile.build	kbuild: Allow to combine multiple W= levels	2011-05-02 17:37:10 +02:00
Makefile.clean	kbuild: Really don't clean bounds.h and asm-offsets.h	2010-03-11 11:15:22 +01:00
Makefile.fwinst
Makefile.headersinst	kbuild: asm-generic support	2011-04-28 18:01:41 +02:00
Makefile.help	Add a target to use the Coccinelle checker	2010-06-12 00:00:29 +02:00
Makefile.host
Makefile.lib	kbuild: Call gzip with -n	2011-04-18 14:24:36 +02:00
Makefile.modbuiltin	kbuild: Create output directory in Makefile.modbuiltin	2010-06-10 12:23:08 +02:00
Makefile.modinst
Makefile.modpost	trivial: fix a typo in a filename	2010-08-03 14:59:50 +02:00
makelst
markup_oops.pl	Merge branch 'for-35' of git://repo.or.cz/linux-kbuild	2010-06-01 08:55:52 -07:00
mkcompile_h	Fix handling of backlash character in LINUX_COMPILE_BY name	2011-04-29 15:55:45 +02:00
mkmakefile	fixes for using make 3.82	2010-08-17 11:47:40 +02:00
mksysmap
mkuboot.sh	mkuboot.sh: Fail if mkimage is missing	2011-01-07 14:31:01 +01:00
mkversion
module-common.lds	linker script: throw away .discard section	2009-06-24 15:13:38 +09:00
namespace.pl	Revert "namespace: add source file location exceptions"	2010-10-28 00:59:56 +02:00
patch-kernel
pnmtologo.c	fbdev: work around old compiler bug	2009-06-30 18:55:59 -07:00
profile2linkerlist.pl	profile2linkerlist: fix perl warnings	2010-03-07 21:39:33 +01:00
recordmcount.c	ftrace: Add .ref.text as one of the safe areas to trace	2011-03-10 10:34:39 -05:00
recordmcount.h	Merge branches 'ftrace', 'gic', 'io', 'kexec', 'mod', 'sa11x0', 'sh' and 'versatile' into devel	2011-01-05 18:08:10 +00:00
recordmcount.pl	ftrace: Add .ref.text as one of the safe areas to trace	2011-03-10 10:34:39 -05:00
setlocalversion	setlocalversion: update mercurial tag parsing	2011-01-15 00:40:44 +01:00
show_delta	scripts: change scripts to use system python instead of env	2010-02-02 14:33:56 +01:00
tags.sh	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6	2011-03-20 18:13:09 -07:00
unifdef.c	unifdef: update to upstream version 2.5	2011-01-22 15:50:59 +01:00
ver_linux	Remove bashisms from scripts	2009-06-09 22:37:54 +02:00
xz_wrap.sh	decompressors: add XZ decompressor module	2011-01-13 08:03:24 -08:00