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Date: Wed, 15 Oct 2014 03:05:46 -0700 From: tip-bot for Stephane Eranian <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: peterz@...radead.org, acme@...hat.com, hpa@...or.com, dsahern@...il.com, linux-kernel@...r.kernel.org, eranian@...gle.com, namhyung@...nel.org, tglx@...utronix.de, mingo@...nel.org, jolsa@...hat.com Subject: [tip:perf/urgent] perf tools: fix off-by-one error in maps Commit-ID: 77faf4d060e3ee1fd2ff6cd39f2b2eb887100422 Gitweb: http://git.kernel.org/tip/77faf4d060e3ee1fd2ff6cd39f2b2eb887100422 Author: Stephane Eranian <eranian@...gle.com> AuthorDate: Mon, 6 Oct 2014 10:35:32 +0200 Committer: Arnaldo Carvalho de Melo <acme@...hat.com> CommitDate: Tue, 14 Oct 2014 17:50:55 -0300 perf tools: fix off-by-one error in maps This patch fixes off-by-one errors in the management of maps. A map is defined by start address and length as implemented by map__new(): map__init(map, type, start, start + len, pgoff, dso); map->start = addr; map->end = end; Consequently, the actual address range is [start; end[ map->end is the first byte outside the range. This patch fixes two bugs where upper bound checking was off-by-one. In V2, we fix map_groups__fixup_overlappings() some more where map->start was off-by-one as reported by Jiri. Signed-off-by: Stephane Eranian <eranian@...gle.com> Acked-by: Namhyung Kim <namhyung@...nel.org> Cc: David Ahern <dsahern@...il.com> Cc: Ingo Molnar <mingo@...nel.org> Cc: Jiri Olsa <jolsa@...hat.com> Cc: Namhyung Kim <namhyung@...nel.org> Cc: Peter Zijlstra <peterz@...radead.org> Link: http://lkml.kernel.org/r/20141006083532.GA4850@quad Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> --- tools/perf/util/map.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index b709059..186418b 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -556,7 +556,7 @@ struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg, int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter) { - if (ams->addr < ams->map->start || ams->addr > ams->map->end) { + if (ams->addr < ams->map->start || ams->addr >= ams->map->end) { if (ams->map->groups == NULL) return -1; ams->map = map_groups__find(ams->map->groups, ams->map->type, @@ -664,7 +664,7 @@ int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, goto move_map; } - before->end = map->start - 1; + before->end = map->start; map_groups__insert(mg, before); if (verbose >= 2) map__fprintf(before, fp); @@ -678,7 +678,7 @@ int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, goto move_map; } - after->start = map->end + 1; + after->start = map->end; map_groups__insert(mg, after); if (verbose >= 2) map__fprintf(after, fp); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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