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8aa8a7c80c
kernel-ark/tools/perf/util
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Stephane Eranian 8aa8a7c80c perf record: Fix buffer overrun bug in tracepoint_id_to_path() 
This patch fixes a buffer overrun bug in
tracepoint_id_to_path(). The bug manisfested itself as a memory
error reported by perf record. I ran into it with perf sched:

 $ perf sched rec noploop 2 noploop for 2 seconds
 [ perf record: Woken up 14 times to write data ]
 [ perf record: Captured and wrote 42.701 MB perf.data (~1865622 samples) ]
 Fatal: No memory to alloc tracepoints list

It turned out that tracepoint_id_to_path() was reading the
tracepoint id using read() but the buffer was not large enough
to include the \n terminator for id with 4 digits or more.

The patch fixes the problem by extending the buffer to a more
reasonable size covering all possible id length include \n
terminator. Note that atoll() stops at the first non digit
character, thus it is not necessary to clear the buffer between
each read.

Signed-off-by: Stephane Eranian <eranian@google.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: fweisbec@gmail.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/20120313155102.GA6465@quad
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-13 17:01:28 +01:00
..
include perf tools: Use for_each_set_bit() to iterate over feature flags 2011-12-23 17:03:36 -02:00
scripting-engines perf script: Add generic perl handler to process events 2011-12-23 17:05:48 -02:00
ui perf tools: Fix broken build by defining _GNU_SOURCE in Makefile 2012-01-30 22:19:54 -02:00
abspath.c
alias.c
annotate.c perf tools: Fix truncated annotation 2011-12-23 16:39:19 -02:00
annotate.h perf symbols: Add nr_events to symbol_conf 2011-11-28 10:37:11 -02:00
bitmap.c
build-id.c perf tools: Rename perf_event_ops to perf_tool 2011-11-28 10:39:28 -02:00
build-id.h perf tools: Rename perf_event_ops to perf_tool 2011-11-28 10:39:28 -02:00
cache.h
callchain.c
callchain.h perf tools: Pass tool context in the the perf_event_ops functions 2011-11-28 10:38:56 -02:00
cgroup.c perf tools: Eliminate duplicate code and use PATH_MAX consistently 2011-11-28 10:11:04 -02:00
cgroup.h
color.c perf stat: Add -o and --append options 2011-08-18 07:46:13 -03:00
color.h
config.c perf tools: Remove stale git headlines from top comment 2011-12-20 13:43:36 -02:00
cpumap.c
cpumap.h
ctype.c
debug.c perf ui browser: Handle K_RESIZE in dialog windows 2011-10-26 13:15:07 -02:00
debug.h perf ui browser: Handle K_RESIZE in dialog windows 2011-10-26 13:15:07 -02:00
debugfs.c perf tools: Simplify debugfs mountpoint handling code 2011-11-28 10:11:28 -02:00
debugfs.h perf tools: Simplify debugfs mountpoint handling code 2011-11-28 10:11:28 -02:00
dwarf-aux.c perf probe: Filter out redundant inline-instances 2011-08-12 09:34:35 -03:00
dwarf-aux.h perf probe: Search concrete out-of-line instances 2011-08-12 09:32:10 -03:00
environment.c
event.c perf tools: Ensure comm string is properly terminated 2012-02-29 18:29:45 -03:00
event.h perf tools: Add ability to synthesize event according to a sample 2011-12-12 08:44:00 -02:00
evlist.c perf evlist: Return first evsel for non-sample event on old kernel 2012-02-29 18:29:44 -03:00
evlist.h perf evlist: Always do automatic allocation of pollfd and mmap structures 2011-11-29 08:05:52 -02:00
evsel.c perf evsel: Fix an issue where perf report fails to show the proper percentage 2012-02-06 18:59:38 -02:00
evsel.h perf tools: Save some loops using perf_evlist__id2evsel 2011-11-28 17:57:40 -02:00
exec_cmd.c
exec_cmd.h
generate-cmdlist.sh
header.c perf tools: Fix strlen() bug in perf_event__synthesize_event_type() 2012-01-30 22:29:12 -02:00
header.h perf tools: Use for_each_set_bit() to iterate over feature flags 2011-12-23 17:03:36 -02:00
help.c
help.h
hist.c perf report: Fix --stdio output alignment when --showcpuutilization used 2012-01-08 13:32:51 -02:00
hist.h perf hists: Stop using 'self' for struct hist_entry 2012-01-06 15:42:52 -02:00
hweight.c
levenshtein.c
levenshtein.h
map.c perf session: Move threads to struct machine 2011-11-28 10:35:31 -02:00
map.h perf tools: Resolve machine earlier and pass it to perf_event_ops 2011-11-28 10:39:12 -02:00
pager.c
parse-events.c perf record: Fix buffer overrun bug in tracepoint_id_to_path() 2012-03-13 17:01:28 +01:00
parse-events.h perf tools: Simplify debugfs mountpoint handling code 2011-11-28 10:11:28 -02:00
parse-options.c
parse-options.h
path.c
PERF-VERSION-GEN perf: clear out make flags when calling kernel make kernelver 2011-06-15 22:12:55 +02:00
probe-event.c perf probe: Ensure offset provided is not greater than function length without DWARF info too 2012-02-29 18:29:46 -03:00
probe-event.h perf probe: Add probed module in front of function 2011-07-15 16:19:08 -04:00
probe-finder.c perf probe: Ensure offset provided is not greater than function length 2012-02-29 18:29:45 -03:00
probe-finder.h perf tools: Eliminate duplicate code and use PATH_MAX consistently 2011-11-28 10:11:04 -02:00
pstack.c
pstack.h
python.c perf evlist: Fix grouping of multiple events 2011-10-26 10:25:02 -02:00
quote.c
quote.h
run-command.c
run-command.h
session.c perf session: Remove impossible condition check 2012-01-03 14:35:02 -02:00
session.h perf tools: Fix out-of-bound access to struct perf_session 2011-12-23 16:57:41 -02:00
setup.py perf evlist: Introduce add_tracepoints method 2011-11-28 10:25:11 -02:00
sigchain.c
sigchain.h
sort.c perf hists browser: Elide DSO column when it is set to just one DSO, ditto for threads 2011-10-20 08:02:30 -02:00
sort.h perf hists: Don't free decayed entries if in the annotation browser 2011-10-13 08:01:33 -03:00
strbuf.c
strbuf.h
strfilter.c perf: Fix missing strndup declaration 2011-03-04 01:17:18 +01:00
strfilter.h
string.c perf probe: Move strtailcmp to string.c 2011-07-15 16:00:47 -04:00
strlist.c
strlist.h
svghelper.c perf timechart: Fix black idle boxes in the title 2011-02-28 08:56:14 +01:00
svghelper.h
symbol.c perf tools: Fix broken build by defining _GNU_SOURCE in Makefile 2012-01-30 22:19:54 -02:00
symbol.h perf symbols: Add nr_events to symbol_conf 2011-11-28 10:37:11 -02:00
thread_map.c
thread_map.h
thread.c perf session: Move threads to struct machine 2011-11-28 10:35:31 -02:00
thread.h perf tools: Resolve machine earlier and pass it to perf_event_ops 2011-11-28 10:39:12 -02:00
tool.h perf tools: Save some loops using perf_evlist__id2evsel 2011-11-28 17:57:40 -02:00
top.c perf top: Reuse the 'report' hist_entry/hists classes 2011-10-07 16:56:44 -03:00
top.h perf tools: Handle kernels that don't support attr.exclude_{guest,host} 2012-03-03 12:19:56 -03:00
trace-event-info.c perf tools: Fix compile error on x86_64 Ubuntu 2012-01-08 13:34:55 -02:00
trace-event-parse.c perf tools: Fix broken build by defining _GNU_SOURCE in Makefile 2012-01-30 22:19:54 -02:00
trace-event-read.c
trace-event-scripting.c perf tools: Resolve machine earlier and pass it to perf_event_ops 2011-11-28 10:39:12 -02:00
trace-event.h perf tools: Resolve machine earlier and pass it to perf_event_ops 2011-11-28 10:39:12 -02:00
types.h
usage.c perf tools: Remove stale git headlines from top comment 2011-12-20 13:43:36 -02:00
util.c perf tools: Change perf_guest default back to false 2012-03-03 12:13:41 -03:00
util.h perf tools: Fix broken build by defining _GNU_SOURCE in Makefile 2012-01-30 22:19:54 -02:00
values.c perf tools: Fix a memory leak on perf_read_values_destroy 2011-12-20 13:41:34 -02:00
values.h
wrapper.c
xyarray.c
xyarray.h