5.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Adrian Hunter adrian.hunter@intel.com
commit d6d457451eb94fa747dc202765592eb8885a7352 upstream.
Kallsyms symbols do not have a size, so the size becomes the distance to the next symbol.
Consequently the recently added trampoline symbols end up with large sizes because the trampolines are some distance from one another and the main kernel map.
However, symbols that end outside their map can disrupt the symbol tree because, after mapping, it can appear incorrectly that they overlap other symbols.
Add logic to truncate symbol size to the end of the corresponding map.
Signed-off-by: Adrian Hunter adrian.hunter@intel.com Acked-by: Jiri Olsa jolsa@kernel.org Cc: stable@vger.kernel.org Fixes: d83212d5dd67 ("kallsyms, x86: Export addresses of PTI entry trampolines") Link: http://lkml.kernel.org/r/20190109091835.5570-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/perf/util/symbol.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -710,6 +710,8 @@ static int map_groups__split_kallsyms_fo }
pos->start -= curr_map->start - curr_map->pgoff; + if (pos->end > curr_map->end) + pos->end = curr_map->end; if (pos->end) pos->end -= curr_map->start - curr_map->pgoff; symbols__insert(&curr_map->dso->symbols, pos);