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Date:      Mon, 18 Apr 2022 20:57:16 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 262894] Kernel Panic (page fault) with 13.1-BETA2 in g_eli & httpd
Message-ID:  <bug-262894-227-xZ4puyomza@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-262894-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-262894-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D262894

--- Comment #28 from Mark Johnston <markj@FreeBSD.org> ---
(In reply to Alexander Motin from comment #26)
BTW, the loop in vdev_geom_fill_unmap_cb() looks wrong to me when (addr &
PAGE_MASK) !=3D 0.  Suppose addr & PAGE_MASK is 2048 and len is 4096.  Then=
 we
want two pages in the array, but it looks like the loop will exit after the
first iteration.  I think we need to set addr &=3D ~PAGE_MASK before the lo=
op, or
I am missing something.

I'm not sure when non-page-aligned ABD buffers can arise in practice though.

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