- This issue is caused by commit deadec4e
(MDEV-24569). InnoDB fails to read the change buffer bitmap page
from dropped tablespace. In ibuf_bitmap_get_map_page_func(), InnoDB
should fetch the page using BUF_GET_POSSIBLY_FREED mode. Callers of
ibuf_bitmap_get_map_page() should be adjusted in that case.

This is after-merge fix of f33e57a9.
In btr_search_drop_page_hash_index(), InnoDB should take
the exclusive lock on the AHI latch if index is already
freed to avoid the freed memory access during buf_pool_resize()

The test case encryption.innodb_encrypt_freed was failing in
MemorySanitizer builds.

recv_recover_page(): Mark non-recovered pages as freed.

fil_crypt_rotate_page(): Before comparing the block->frame contents,
check if the block was marked as freed.

Other places: Whenever using BUF_GET_POSSIBLY_FREED, check the
block->page.status before accessing the page frame.

(Both uses of BUF_GET_IF_IN_POOL should be correct now.)

disable warnings, as they're different on 32bit platforms

Closes #1757

Add missing DBUG_RETURN to my_malloc.

- This is caused by commit deadec4e
(MDEV-24569). InnoDB fails to set the tablespace associated with
mini-transacton while resetting the change buffer bitmap bits of
the page.

Correcting an incorrect merge from 10.2

Backport of 4bc31a90

Include client libraries for auth caching_sha2_password and
sha256_password in the libmariadb3 client library package.

Like the 10.2 version 1635686b,
except C++ on internal functions for my_assume_aligned.

volatile != atomic.

volatile has no memory barrier schemantics, its for mmaped IO
so lets allow some optimizer gains and stop pretending it helps
with memory atomicity.

The MDEV lists a SEGV an assumption is made that an address was
partially read. As C packs structs strictly in order and on arm64 the
cache line size is 128 bits. A pointer (link - 64 bits), followed
by a hashnr (uint32 - 32 bits), leaves the following key (uchar *
64 bits), neither naturally aligned to any pointer and worse, split
across a cache line which is the processors view of an atomic
reservation of memory.

lf_dynarray_lvalue is assumed to return a 64 bit aligned address.

As a solution move the 32bit hashnr to the end so we don't get the
*key pointer split across two cache lines.

Tested by: Krunal Bauskar
Reviewer: Marko Mäkelä

volatile != atomic.

volatile has no memory barrier schemantics, its for mmaped IO
so lets allow some optimizer gains and stop pretending it helps
with memory atomicity.

The MDEV lists a SEGV an assumption is made that an address was
partially read. As C packs structs strictly in order and on arm64 the
cache line size is 128 bits. A pointer (link - 64 bits), followed
by a hashnr (uint32 - 32 bits), leaves the following key (uchar *
64 bits), neither naturally aligned to any pointer and worse, split
across a cache line which is the processors view of an atomic
reservation of memory.

lf_dynarray_lvalue is assumed to return a 64 bit aligned address.

As a solution move the 32bit hashnr to the end so we don't get the
*key pointer split across two cache lines.

Tested by: Krunal Bauskar
Reviewer: Marko Mäkelä

This bug caused crashes of the server when processing queries with table
value constructors (TVC) that contained subqueries and were used itself as
subselects. For such TVCs the following transformation is applied at the
prepare stage:
  VALUES (v1), ... (vn) => SELECT * FROM (VALUES (v1), ... (vn)) tvc_x.
This transformation allows to reduce the problem of evaluation of TVCs used
as subselects to the problem of evaluation of regular subselects.
The transformation is implemented in the wrap_tvc(). The code the function
to mimic the behaviour of the parser when processing the result of the
transformation. However this imitation was not free of some flaws. First
the function called the method exclude() that completely destroyed the
select tree structures below the transformed TVC. Second the function
used the procedure mysql_new_select to create st_select_lex nodes for
both wrapping select of the transformation and TVC. This also led to
constructing of invalid select tree structures.
The patch actually re-engineers the code of wrap_tvc().

Approved by Oleksandr Byelkin <sanja@mariadb.com>

Problem was that we used heap allocated key using too small
array. Fixed by using dynamic memory allocation using actual
needed size.

Null poiter reference in case where bf_thd has no trx .e.g. when
we have MDL-conflict.

Null poiter reference in case where bf_thd has no trx .e.g. when
we have MDL-conflict.

The problem was in and_all_keys(), the code of MDEV-9759 which calculates
the new tree weight:

First, it didn't take into account the case when

(next->next_key_part=tmp) == NULL

and dereferenced a NULL pointer when getting tmp->weight.

Second, "if (param->alloced_sel_args > SEL_ARG::MAX_SEL_ARGS) break"
could leave the loop with incorrect value of weight.

Fixed by introducing SEL_ARG::update_weight_locally() and calling it
at the end of the function. This allows to avoid caring about all the
above cases.

filename_hash is a function from libiberty.a from the system
but also an expored name in the perf schema static library.

We'll use a different name.

Introduced by 85828b8f

This is running 2 git processes in parallel, which, if unlucky can cause
either of them to fail with "File already exists" error.

Given PASSWORD EXPIRE and PASSWORD EXPIRE [NEVER|INTERVAL x DAY] are
two different mechanisms, SHOW CREATE USER should display all the
information required to restore the state of an account which
includes both a manual expired state and an automatic policy.

The solution proposed here keeps a CREATE USER ... PASSWORD EXPIRE
statement and adds an aditional
ALTER USER .. PASSWORD EXPIRE [NEVER|INTERVAL x DAY] when necessary

This way a tool can restore almost the complete state of an account
as it was before a dump. The only information left still is the
value of the password_last_changed column from mysql.global_priv

- The commit 5fd3c747(MDEV-24709)
resets the recv_no_ibuf_operations in
recv_recovery_from_checkpoint_start(), but InnoDB fails to reset
the variable recv_no_log_write() during that time and that leads
to the assert failure.

This was caused by two different bugs:
1) Information_schema tables where not locked by lock_tables, but
   get_lock_data() was not filtering these out. This caused a crash when
   mysql_unlock_some_tables() tried to unlock tables early, including
   not locked information schema tables.

Fixed by not locking SYSTEM_TMP_TABLES

2) In some cases the optimizer will notice that we do not need to read
   the information_schema tables at all. In this case
   join_tab->read_record is not set, which caused a crash in
   get_schema_tables_result()

Fixed by ignoring const tables in get_schema_tables_result()