From 00ddf72a6f5cfe137a70d385ae3fc7a92f6b2a98 Mon Sep 17 00:00:00 2001 From: Jonathan Wakely Date: Tue, 4 May 2021 15:46:28 +0100 Subject: [PATCH] libstdc++: Fix null dereference in pb_ds containers This fixes ubsan errors: ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp:533:15: runtime error: member access within null pointer of type 'struct entry' libstdc++-v3/ChangeLog: * include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp (find_key_pointer(key_const_reference, false_type)) (find_key_pointer(key_const_reference, true_type)): Do not dereference null pointer. (cherry picked from commit ca871701c2822c3c4537745d4aa44a7b8f408337) --- .../detail/cc_hash_table_map_/cc_ht_map_.hpp | 26 ++++++++++++------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/libstdc++-v3/include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp b/libstdc++-v3/include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp index aa5c94b9aed..c81bf3abfef 100644 --- a/libstdc++-v3/include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp +++ b/libstdc++-v3/include/ext/pb_ds/detail/cc_hash_table_map_/cc_ht_map_.hpp @@ -524,13 +524,16 @@ namespace __gnu_pbds resize_base::notify_find_search_end(); -#ifdef _GLIBCXX_DEBUG if (p_e == 0) - PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key) + { + PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key) + return 0; + } else - PB_DS_CHECK_KEY_EXISTS(r_key) -#endif - return &p_e->m_value; + { + PB_DS_CHECK_KEY_EXISTS(r_key) + return &p_e->m_value; + } } inline pointer @@ -550,13 +553,16 @@ namespace __gnu_pbds resize_base::notify_find_search_end(); -#ifdef _GLIBCXX_DEBUG if (p_e == 0) - PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key) + { + PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key) + return 0; + } else - PB_DS_CHECK_KEY_EXISTS(r_key) -#endif - return &p_e->m_value; + { + PB_DS_CHECK_KEY_EXISTS(r_key) + return &p_e->m_value; + } } inline bool