https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260453
Bug ID: 260453
Summary: ZFS truncated write to O_APPEND file from mmap'ed
memory
Product: Base System
Version: 13.0-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Summary:
A file is opened for O_APPEND
writev(2) is called with 480 bytes from a mmap'ed neighbor file.
writev(2) returns 480
The file only grows by 194 bytes.
Seen on: 13.0p5, emaste reproduced on ref13-amd64
ZFS seems to be a requirement for the failure.
To reproduce:
git clone https://github.com/bsdphk/AardWARC
cd AardWARC
make test (The action happens in /tmp)
The bug triggers the following assert:
Assert error in silo_attempt_append(), wsilo.c line 436:
Condition((off_t)s == (after - before)) not true.
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