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Leo Yan 363bbaef63 perf map: Fix potential NULL pointer dereference found by smatch tool 
Based on the following report from Smatch, fix the potential NULL
pointer dereference check.

  tools/perf/util/map.c:479
  map__fprintf_srccode() error: we previously assumed 'state' could be
  null (see line 466)

  tools/perf/util/map.c
  465         /* Avoid redundant printing */
  466         if (state &&
  467             state->srcfile &&
  468             !strcmp(state->srcfile, srcfile) &&
  469             state->line == line) {
  470                 free(srcfile);
  471                 return 0;
  472         }
  473
  474         srccode = find_sourceline(srcfile, line, &len);
  475         if (!srccode)
  476                 goto out_free_line;
  477
  478         ret = fprintf(fp, "|%-8d %.*s", line, len, srccode);
  479         state->srcfile = srcfile;
              ^^^^^^^
  480         state->line = line;
              ^^^^^^^

This patch validates 'state' pointer before access its elements.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Alexios Zavras <alexios.zavras@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Changbin Du <changbin.du@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Eric Saint-Etienne <eric.saint.etienne@oracle.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Song Liu <songliubraving@fb.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: linux-arm-kernel@lists.infradead.org
Fixes: dd2e18e9ac ("perf tools: Support 'srccode' output")
Link: http://lkml.kernel.org/r/20190702103420.27540-8-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 		2019-07-09 09:33:55 -03:00
..
Documentation perf tools: Fix typos / broken sentences 2019-07-02 16:08:16 -03:00
arch Linux 5.2 2019-07-08 18:04:41 +02:00
bench perf bench numa: Add define for RUSAGE_THREAD if not present 2019-05-02 16:00:20 -04:00
examples/bpf perf augmented_raw_syscalls: Move reading filename to the loop 2019-06-05 09:48:55 -03:00
include/bpf perf bpf: Automatically add BTF ELF markers 2019-03-06 09:45:37 -03:00
jvmti tools build: Check if gettid() is available before providing helper 2019-07-07 17:53:09 -03:00
pmu-events perf vendor events intel: Metric fixes for SKX/CLX 2019-07-02 16:08:16 -03:00
python treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 407 2019-06-05 17:37:14 +02:00
scripts perf scripts python: export-to-postgresql.py: Export Intel PT power and ptwrite events 2019-06-25 08:47:10 -03:00
tests perf test mmap-thread-lookup: Initialize variable to suppress memory sanitizer warning 2019-07-09 09:33:54 -03:00
trace perf trace: Beautify 'sync_file_range' arguments 2019-05-28 18:37:43 -03:00
ui perf annotate TUI browser: Do not use member from variable within its own initialization 2019-07-06 16:59:11 -03:00
util perf map: Fix potential NULL pointer dereference found by smatch tool 2019-07-09 09:33:55 -03:00
.gitignore perf tools: Add trace/beauty/generated/ into .gitignore 2018-02-05 13:58:02 -03:00
Build perf tools: Rename build libperf to perf 2019-02-14 15:18:08 -03:00
CREDITS
…
MANIFEST tools lib: Move argv_{split,free} from tools/perf/util/ 2019-07-01 22:50:40 -03:00
Makefile perf tools: Disable parallelism for 'make clean' 2018-08-20 08:54:58 -03:00
Makefile.config tools build: Check if gettid() is available before providing helper 2019-07-07 17:53:09 -03:00
Makefile.perf Linux 5.2-rc3 2019-06-03 11:56:35 +02:00
builtin-annotate.c perf annotate: Remove hist__account_cycles() from callback 2019-05-15 16:36:46 -03:00
builtin-bench.c perf bench: Add epoll_ctl(2) benchmark 2018-11-21 22:39:55 -03:00
builtin-buildid-cache.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-buildid-list.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-c2c.c perf c2c: Fix c2c report for empty numa node 2019-03-06 18:15:24 -03:00
builtin-config.c perf config: Show the configuration when no arguments are provided 2018-12-18 12:24:00 -03:00
builtin-data.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
builtin-diff.c perf diff: Print the basic block cycles diff 2019-07-02 13:20:51 -03:00
builtin-evlist.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-ftrace.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 433 2019-06-05 17:37:16 +02:00
builtin-help.c perf help: Remove needless use of strncpy() 2018-12-17 14:59:18 -03:00
builtin-inject.c perf inject: Enable COMPRESSED record decompression 2019-05-15 16:36:49 -03:00
builtin-kallsyms.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 251 2019-06-05 17:30:26 +02:00
builtin-kmem.c tools perf: Move from sane_ctype.h obtained from git to the Linux's original 2019-06-25 21:02:47 -03:00
builtin-kvm.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-list.c perf list: Output tool events 2019-04-01 14:49:25 -03:00
builtin-lock.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-mem.c perf data: Add global path holder 2019-02-22 16:52:07 -03:00
builtin-probe.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
builtin-record.c perf record: Add support to collect callchains from kernel or user space only 2019-06-10 15:50:01 -03:00
builtin-report.c perf report: Use skip_spaces() 2019-06-26 11:31:43 -03:00
builtin-sched.c tools perf: Move from sane_ctype.h obtained from git to the Linux's original 2019-06-25 21:02:47 -03:00
builtin-script.c perf script: Allow specifying the files to process guest samples 2019-07-03 00:13:25 -03:00
builtin-stat.c perf stat: Fix use-after-freed pointer detected by the smatch tool 2019-07-09 09:33:54 -03:00
builtin-timechart.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
builtin-top.c perf top: Fix potential NULL pointer dereference detected by the smatch tool 2019-07-09 09:33:54 -03:00
builtin-trace.c perf trace: Fix potential NULL pointer dereference found by the smatch tool 2019-07-09 09:33:55 -03:00
builtin-version.c tools build: Implement libzstd feature check, LIBZSTD_DIR and NO_LIBZSTD defines 2019-04-01 15:18:10 -03:00
builtin.h perf script: Add array bound checking to list_scripts 2019-03-11 16:33:19 -03:00
check-headers.sh tools perf: Move from sane_ctype.h obtained from git to the Linux's original 2019-06-25 21:02:47 -03:00
command-list.txt perf help: Add missing subcommand `version` 2018-09-19 14:53:36 -03:00
design.txt perf/doc: Update design.txt for exclude_{host|guest} flags 2019-01-21 11:01:18 +01:00
perf-archive.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf-completion.sh perf tools: Auto-complete for events with ':' 2017-12-27 12:16:00 -03:00
perf-read-vdso.c perf tools: Make find_vdso_map() more modular 2019-01-08 13:28:13 -03:00
perf-sys.h Drop a bunch of metag references 2018-02-23 14:29:59 +00:00
perf-with-kcore.sh Merge branch 'x86/cpu' into perf/core, to pick up dependent changes 2019-06-17 12:29:16 +02:00
perf.c perf tools: Add missing util.h to pick up 'page_size' variable 2019-06-25 18:35:34 -03:00
perf.h perf tools: Increase MAX_NR_CPUS and MAX_CACHES 2019-06-25 08:47:10 -03:00