From 18a26b301b6ab0d68474fbfffb0d17adf69e8824 Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Wed, 14 Apr 2010 22:16:06 -0700 Subject: [PATCH] Don't crash in trace mode when dependencies are missing --- ChangeLog | 5 +++++ elf/dl-version.c | 12 ++++++++---- 2 files changed, 13 insertions(+), 4 deletions(-) diff --git a/ChangeLog b/ChangeLog index 0196c24..9b23fd9 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2010-04-14 Andreas Schwab + + * elf/dl-version.c (_dl_check_map_versions): Avoid index overflow + when dependencies are missing. + 2010-04-14 H.J. Lu * sysdeps/x86_64/multiarch/memcmp-sse4.S: Optimized for unaligned diff --git a/elf/dl-version.c b/elf/dl-version.c index 9e88116..c59a6c3 100644 --- a/elf/dl-version.c +++ b/elf/dl-version.c @@ -322,10 +322,14 @@ _dl_check_map_versions (struct link_map *map, int verbose, int trace_mode) while (1) { ElfW(Half) ndx = aux->vna_other & 0x7fff; - map->l_versions[ndx].hash = aux->vna_hash; - map->l_versions[ndx].hidden = aux->vna_other & 0x8000; - map->l_versions[ndx].name = &strtab[aux->vna_name]; - map->l_versions[ndx].filename = &strtab[ent->vn_file]; + /* In trace mode, dependencies may be missing. */ + if (__builtin_expect (ndx < map->l_nversions, 1)) + { + map->l_versions[ndx].hash = aux->vna_hash; + map->l_versions[ndx].hidden = aux->vna_other & 0x8000; + map->l_versions[ndx].name = &strtab[aux->vna_name]; + map->l_versions[ndx].filename = &strtab[ent->vn_file]; + } if (aux->vna_next == 0) /* No more symbols. */ -- 2.7.4