diff options
| author | Vedant Kumar <vsk@apple.com> | 2017-06-01 16:44:11 +0000 |
|---|---|---|
| committer | Vedant Kumar <vsk@apple.com> | 2017-06-01 16:44:11 +0000 |
| commit | bfeededd7ee43fe38262619ec200687875ae82a1 (patch) | |
| tree | 60c4422bef86e5e631303be46506937600d2768f /lib/ubsan | |
| parent | 27c8277872fdff5466439844251c9c52ec37dadb (diff) | |
Bug 33221 [UBSAN] segfault with -fsanitize=undefined
There is can be a situation when vptr is not initializing
by constructor of the object, and has a junk data which should
be properly checked, because c++ standard says:
"if default constructor is not specified
16 (7.3) no initialization is performed."
Patch by Denis Khalikov!
Differential Revision: https://reviews.llvm.org/D33712
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@304437 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/ubsan')
| -rw-r--r-- | lib/ubsan/ubsan_type_hash_itanium.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/ubsan/ubsan_type_hash_itanium.cc b/lib/ubsan/ubsan_type_hash_itanium.cc index 5ae5ae0dc..729c4a0f3 100644 --- a/lib/ubsan/ubsan_type_hash_itanium.cc +++ b/lib/ubsan/ubsan_type_hash_itanium.cc @@ -197,7 +197,7 @@ struct VtablePrefix { }; VtablePrefix *getVtablePrefix(void *Vtable) { VtablePrefix *Vptr = reinterpret_cast<VtablePrefix*>(Vtable); - if (!Vptr) + if (!IsAccessibleMemoryRange((uptr)Vptr, sizeof(VtablePrefix))) return nullptr; VtablePrefix *Prefix = Vptr - 1; if (!Prefix->TypeInfo) |