Bug 279038

Summary:	zfs panic: VERIFY3(dev->l2ad_hand + distance < dev->l2ad_end) failed
Product:	Base System	Reporter:	John F. Carr <jfc>
Component:	kern	Assignee:	freebsd-fs (Nobody) <fs>
Status:	New ---
Severity:	Affects Only Me	Keywords:	crash
Priority:	---
Version:	13.2-STABLE
Hardware:	Any
OS:	Any
See Also:	https://github.com/openzfs/zfs/issues/16202

Description John F. Carr 2024-05-16 15:33:04 UTC

While receiving incremental rsync data over the network my server crashed with message

panic: VERIFY3(dev->l2ad_hand + distance < dev->l2ad_end) failed (161060749312 < 161060749312)

Looking at arc.c, end of function l2arc_evict, I wonder if < should be <=.

The relevant variables are

 l2ad_hand = 161051246592
 l2ad_start = 4198400
 l2ad_end = 161060749312
 l2ad_first = 0
 l2ad_writing = 0

 distance = 9502720

# zfs version
zfs-2.1.15-FreeBSD_gfb6d53206
zfs-kmod-2.1.15-FreeBSD_gd99134be8

The server has a raidz2 pool on 3.5 inch hard drives with a cache on SSD.  RAM is 24 GB and there is no other pressure on memory or CPU.

Comment 1 John F. Carr 2024-05-25 13:53:27 UTC

A fix for this bug has been committed upstream.  See ZFS bug report 16202 in "See Also" field.