I'm not able to reproduce it using your reproduction receipe using
e2fsprogs 1.43.4. I suspect you might be hitting a bug which was
fixed by this commit:
commit d6cad379eb6c86ca58bf5b83a586577de412a2e6
Author: Theodore Ts'o <tytso@xxxxxxx>
Date: Sun Sep 11 00:25:48 2016 -0400
libext2fs: fix unaligned, multiblock writes in the unix_io handler
The read-modify-write code for the unaligned fallback code wasn't
working for multi-block writes. This was unmasked by FreeBSD 11-rc2,
since its malloc() is returning unaligned memory regions for large
memory regions.
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Can you retry with e2fsprogs 1.43.4 and see if it fixes your issue?
- Ted
