[Bug 253158] Panic: snapacct_ufs2: bad block - Non-suJ mksnap_ffs(8) crash

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253158

--- Comment #24 from Konstantin Belousov <kib at FreeBSD.org> ---
(In reply to Cy Schubert from comment #23)
I think it is combination of the filesystem size and something that I do not
currently quite understand in the ffs snapshot code that makes UFS_BALLOC()
to return buffer of full block size, but only with the first page populated,
instead of all 8 pages.

The buffer should be pointed to by bp, and belongs to the vnode carrying the
ip inode.

So I want/need the data I asked for.  Might be Kirk has an idea from the
description above.

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