Data Corruption bug with Samba's vfs_iouring and Linux 5.6.7/5.7rc3

Stefan Metzmacher metze at
Wed May 6 10:33:59 UTC 2020

Hi Anoop,

> I could reproduce the difference in SHA256 checksum after copying a
> directory with 100 copies of test file(provided by reporter) from
> io_uring VFS module enabled share using Windows explorer(right-click-
>> copy/paste). Only 5 out of 100 files had correct checksum after copy
> operation :-/

Great! Can you please try to collect level 1 log files with
the patch

If you use files with only 0xff please also use the
"io_uring:check_ff=yes" option.

Maybe the problem is really triggered by short reads...


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