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b9a46bba88
linux/tools/perf/util
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Jiri Olsa b9a46bba88 perf top: Fix events overflow in top command 
The snprintf function returns number of printed characters even if it
cross the size parameter. So passing enough events via '-e' parameter
will cause segmentation fault.

It's reproduced by following command:

perf top -e `perf list | grep Tracepoint | awk -F'[' '\
{gsub(/[[:space:]]+/,"",$1);array[FNR]=$1}END{outputs=array[1];\
for (i=2;i<=FNR;i++){ outputs=outputs "," array[i];};print outputs}'`

Attached patch is adding SNPRINTF macro that provides the overflow check
and returns actuall number of printed characters.

Reported-by: Han Pingtian <phan@redhat.com>
Cc: Han Pingtian <phan@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1299528821-17521-2-git-send-email-jolsa@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-03-10 10:54:13 -03:00
..
include perf evsel: Introduce perf_evlist 2011-01-22 19:56:28 -02:00
scripting-engines perf tool: Fix gcc 4.6.0 issues 2011-02-07 12:41:41 -02:00
ui perf report tui: Improve multi event session support 2011-03-06 13:14:53 -03:00
abspath.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
alias.c
annotate.c perf annotate: Show better message when no vmlinux is found 2011-02-23 12:13:39 -03:00
annotate.h perf top: Live TUI Annotation 2011-02-22 12:02:07 -03:00
bitmap.c perf tools: Don't use code surrounded by __KERNEL__ 2010-05-02 12:00:44 -03:00
build-id.c perf tools: Kill event_t typedef, use 'union perf_event' instead 2011-01-29 16:25:37 -02:00
build-id.h perf annotate: Use build-ids to find the right DSO 2010-05-20 12:15:33 -03:00
cache.h perf tools: Don't fallback to setup_pager unconditionally 2011-01-31 18:08:39 -02:00
callchain.c perf tools: Kill event_t typedef, use 'union perf_event' instead 2011-01-29 16:25:37 -02:00
callchain.h perf tools: Kill event_t typedef, use 'union perf_event' instead 2011-01-29 16:25:37 -02:00
cgroup.c perf tool: Add cgroup support 2011-02-16 13:30:48 +01:00
cgroup.h perf tool: Add cgroup support 2011-02-16 13:30:48 +01:00
color.c perf hist: Replace ->print() routines by ->snprintf() equivalents 2010-04-02 16:28:15 -03:00
color.h perf hist: Replace ->print() routines by ->snprintf() equivalents 2010-04-02 16:28:15 -03:00
config.c perf buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
cpumap.c perf tools: Add missing cpu_map__delete() 2011-01-22 19:56:30 -02:00
cpumap.h perf tools: Add missing cpu_map__delete() 2011-01-22 19:56:30 -02:00
ctype.c perf tools: Move graph_line and graph_dotted_line from top 2009-11-23 21:55:20 +01:00
debug.c perf tools: Kill event_t typedef, use 'union perf_event' instead 2011-01-29 16:25:37 -02:00
debug.h perf tools: Kill event_t typedef, use 'union perf_event' instead 2011-01-29 16:25:37 -02:00
debugfs.c perf trace: Clean up find_debugfs() 2009-12-28 10:36:36 +01:00
debugfs.h perf tools: Mount debugfs automatically 2009-12-28 10:36:36 +01:00
environment.c
event.c perf hists: Remove needless global col lenght calcs 2011-03-05 22:31:04 -03:00
event.h Merge remote branch 'acme/perf/urgent' into perf/core 2011-02-11 11:45:54 -02:00
evlist.c perf evlist: Split perf_evlist__id_hash 2011-03-06 13:10:45 -03:00
evlist.h perf evlist: Split perf_evlist__id_hash 2011-03-06 13:10:45 -03:00
evsel.c perf evsel: Fix inverted test for fixing up attr.inherit flag 2011-02-21 22:27:59 -03:00
evsel.h perf tools: Improve support for sessions with multiple events 2011-03-06 13:13:40 -03:00
exec_cmd.c perf tools: Makefile: Remove various and sundry cruft 2011-02-18 07:43:06 -02:00
exec_cmd.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
generate-cmdlist.sh
header.c perf tools: Improve support for sessions with multiple events 2011-03-06 13:13:40 -03:00
header.h perf tools: Improve support for sessions with multiple events 2011-03-06 13:13:40 -03:00
help.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
help.h
hist.c perf tools: Improve support for sessions with multiple events 2011-03-06 13:13:40 -03:00
hist.h perf report tui: Improve multi event session support 2011-03-06 13:14:53 -03:00
hweight.c perf tools: Don't use code surrounded by __KERNEL__ 2010-05-02 12:00:44 -03:00
levenshtein.c
levenshtein.h
map.c perf tools: Fix 64 bit integer format strings 2011-01-22 23:41:57 -02:00
map.h perf probe: Add basic module support 2010-10-21 16:11:44 -02:00
pager.c
parse-events.c perf list: Allow filtering list of events 2011-02-17 15:38:58 -02:00
parse-events.h perf list: Allow filtering list of events 2011-02-17 15:38:58 -02:00
parse-options.c perf options: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
parse-options.h perf options: add OPT_CALLBACK_DEFAULT_NOOPT 2010-12-06 15:33:29 -02:00
path.c perf tools: add test for strlcpy() 2010-08-21 11:22:47 -03:00
PERF-VERSION-GEN perf: Version String fix, for fallback if not from git 2010-07-05 10:42:58 +02:00
probe-event.c perf probe: Remove redundant checks 2011-02-22 07:02:07 -03:00
probe-event.h perf probe: Add filters support for available functions 2011-01-28 09:20:25 -02:00
probe-finder.c perf probe: Remove redundant checks 2011-02-22 07:02:07 -03:00
probe-finder.h perf tools: Remove hardcoded include paths for elfutils 2010-11-19 16:38:04 -02:00
pstack.c perf newt: Make <- zoom out filters 2010-05-14 20:05:21 -03:00
pstack.h perf ui: Move hists browser to util/ui/browsers/ 2010-08-10 16:11:08 -03:00
python.c perf: Fix undefined PyVarObject_HEAD_INIT in python 2.5 2011-03-04 01:17:27 +01:00
quote.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
quote.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
run-command.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
run-command.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
session.c perf tools: Improve support for sessions with multiple events 2011-03-06 13:13:40 -03:00
session.h perf tools: Improve support for sessions with multiple events 2011-03-06 13:13:40 -03:00
setup.py perf python: Add cgroup.c to setup.py to get it building again 2011-02-17 10:07:42 -02:00
sigchain.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
sigchain.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
sort.c perf hist: Better displaying of unresolved DSOs and symbols 2010-12-06 15:12:34 -02:00
sort.h perf: Keep track of the max depth of a callchain 2010-08-22 20:43:17 +02:00
strbuf.c perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
strbuf.h perf tools: Remove some unused functions 2010-05-18 23:03:35 -03:00
strfilter.c perf: Fix missing strndup declaration 2011-03-04 01:17:18 +01:00
strfilter.h perf tools: Add strfilter for general purpose string filter 2011-01-28 09:19:38 -02:00
string.c perf tools: Fix lazy wildcard matching 2010-12-21 19:15:42 -02:00
strlist.c perf probe: Fix --del to update current event list 2009-12-15 20:22:01 +01:00
strlist.h perf tools: Add for_each macros for strlist 2009-12-15 20:22:02 +01:00
svghelper.c perf timechart: Fix black idle boxes in the title 2011-02-28 08:56:14 +01:00
svghelper.h
symbol.c perf hists: Remove needless global col lenght calcs 2011-03-05 22:31:04 -03:00
symbol.h perf hists: Remove needless global col lenght calcs 2011-03-05 22:31:04 -03:00
thread_map.c perf threads: Move thread_map to separate file 2011-01-24 10:59:00 -02:00
thread_map.h perf threads: Move thread_map to separate file 2011-01-24 10:59:00 -02:00
thread.c perf threads: Move thread_map to separate file 2011-01-24 10:59:00 -02:00
thread.h perf threads: Move thread_map to separate file 2011-01-24 10:59:00 -02:00
top.c perf top: Fix events overflow in top command 2011-03-10 10:54:13 -03:00
top.h perf top tui: Wait till the first sample to refresh the screen. 2011-03-01 10:43:03 -03:00
trace-event-info.c perf tools: Introduce event selectors 2011-01-03 16:39:04 -02:00
trace-event-parse.c perf tool: Fix gcc 4.6.0 issues 2011-02-07 12:41:41 -02:00
trace-event-read.c perf: Use read() instead of lseek() in trace_event_read.c:skip() 2010-05-20 08:37:17 +02:00
trace-event-scripting.c perf trace scripting: Fix extern struct definitions 2010-10-04 12:24:51 -03:00
trace-event.h perf tools: Introduce event selectors 2011-01-03 16:39:04 -02:00
types.h perf tools: Fix 64 bit integer format strings 2011-01-22 23:41:57 -02:00
usage.c
util.c perf util: Move do_read from session to util 2011-01-03 16:50:55 -02:00
util.h perf tools: Makefile: Remove platform-specific cruft 2011-02-18 07:42:07 -02:00
values.c perf tools: Fix 64 bit integer format strings 2011-01-22 23:41:57 -02:00
values.h
wrapper.c perf tools: remove xstrndup, xmalloc, xzalloc 2010-05-18 23:05:28 -03:00
xyarray.c perf tools: Introduce event selectors 2011-01-03 16:39:04 -02:00
xyarray.h perf tools: Introduce event selectors 2011-01-03 16:39:04 -02:00