Checksum seek at end cause read failed #10340
Description
Bug Report
tiflash/dbms/src/IO/Checksum/ChecksumBuffer.h
Lines 436 to 440 in dce9588
If target_frame == current_frame && working_buffer is cleared. The pos is forwarded, then when we call next() after seek, we will read from an invalid memory.
The issue may lead to errors as follow
Code: 271, e.displayText() = DB::Exception: Data compressed with different methods, given method byte 0xbb, previous method byte 0x82: (while reading from DTFile: s3://s90592969/data/ks_37715_t_146/dmf_4432, column: 27:): while building stable index for index_ids=[2, 3], e.what() = DB::Exception
Maybe releated to this bug or not. Reading from S3 report errno=115
[2025/08/12 15:59:53.651 +00:00] [ERROR] [S3RandomAccessFile.cpp:118] ["Cannot read from istream, size=1048592 gcount=0 state=0x06 cur_offset=977287744 content_length=978111336 errno=115 errmsg=Operation now in progress cost=2896ns"] [source=s86062474/data/ks_90779_t_441/dmf_28961/7.dat] [thread_id=3925]