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Alexander Barkov 583b39811c MDEV-35620 UBSAN: runtime error: applying zero offset to null pointer 
in _ma_unique_hash, skip_trailing_space, my_hash_sort_mb_nopad_bin and my_strnncollsp_utf8mb4_bin

UBSAN detected the nullptr-with-offset in a few places
when handling empty blobs.

Fix:
- Adding DBUG_ASSERT(source_string) into all hash_sort() implementations
  to catch this problem in non-UBSAN debug builds.
- Fixing mi_unique_hash(), mi_unique_comp(),
  _ma_unique_hash(), _ma_unique_comp() to replace NULL pointer to
  an empty string ponter..

Note, we should also add DBUG_ASSERT(source_string != NULL) into
all implementations of strnncoll*(). But I'm afraid the patch
is going to be too long and too dangerous for 10.5.
2025-02-03 16:45:02 +04:00
..
CMakeLists.txt Merge 10.2 into 10.3 2019-05-14 17:18:46 +03:00
versioning.cc MDEV-35620 UBSAN: runtime error: applying zero offset to null pointer 2025-02-03 16:45:02 +04:00