From ca871701c2822c3c4537745d4aa44a7b8f408337 Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
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.
---
.../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 aa5c94b9aed8..c81bf3abfeff 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
--
GitLab