MDEV-23867: insert... select crash in compute_window_func

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There are 2 issues here:

Issue #1: memory allocation.
An IO_CACHE that uses encryption uses a larger buffer (it needs space for the encrypted data,
decrypted data, IO_CACHE_CRYPT struct to describe encryption parameters etc).

Issue #2: IO_CACHE::seek_not_done
When IO_CACHE objects are cloned, they still share the file descriptor.
This means, operation on one IO_CACHE may change the file read position
which will confuse other IO_CACHEs using it.

The fix of these issues would be:
Allocate the buffer to also include the extra size needed for encryption.
Perform seek again after one IO_CACHE reads the file.

...

This commit is contained in:

Varun Gupta

2020-10-23 12:32:49 +05:30

parent 5a9df1550f

commit b94e8e4b25

6 changed files with 3946 additions and 7 deletions

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mysql-test/suite/encryption/r/tempfiles_encrypted.result Normal file

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