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| author | Patrick Palka <patrick@parcs.ath.cx> | 2014-03-13 02:40:51 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-03-14 20:45:54 +0400 |
| commit | 6eeefccdcfc2cc9697562e740bfe6c35fddd4e1c (patch) | |
| tree | 8485c870071abd4d7600a5441ed3539beeebd9ec | |
| parent | 0fae799e869b9b1ece8c04c714d0529da0b0bade (diff) | |
| download | linux-6eeefccdcfc2cc9697562e740bfe6c35fddd4e1c.tar.xz | |
perf bench: Fix NULL pointer dereference in "perf bench all"
The for_each_bench() macro must check that the "benchmarks" field of a
collection is not NULL before dereferencing it because the "all"
collection in particular has a NULL "benchmarks" field (signifying that
it has no benchmarks to iterate over).
This fixes this NULL pointer dereference when running "perf bench all":
[root@ssdandy ~]# perf bench all
<SNIP>
# Running mem/memset benchmark...
# Copying 1MB Bytes ...
2.453675 GB/Sec
12.056327 GB/Sec (with prefault)
Segmentation fault (core dumped)
[root@ssdandy ~]#
Signed-off-by: Patrick Palka <patrick@parcs.ath.cx>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1394664051-6037-1-git-send-email-patrick@parcs.ath.cx
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/builtin-bench.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c index e47f90cc7b98..8a987d252780 100644 --- a/tools/perf/builtin-bench.c +++ b/tools/perf/builtin-bench.c @@ -76,7 +76,7 @@ static struct collection collections[] = { /* Iterate over all benchmarks within a collection: */ #define for_each_bench(coll, bench) \ - for (bench = coll->benchmarks; bench->name; bench++) + for (bench = coll->benchmarks; bench && bench->name; bench++) static void dump_benchmarks(struct collection *coll) { |