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| H A D | union_subr.c | diff a2ddbe019d51b35f9da2cb5ddca8c69f0ee422da Sun Dec 24 05:48:19 CET 2023 Jason A. Harmening <jah@FreeBSD.org> unionfs: work around underlying FS failing to respect cn_namelen
unionfs_mkshadowdir() may be invoked on a non-leaf pathname component
during lookup, in which case the NUL terminator of the pathname buffer
will be well beyond the end of the current component. cn_namelen in
this case will still (correctly) indicate the length of only the
current component, but ZFS in particular does not currently respect
cn_namelen, leading to the creation on inacessible files with slashes
in their names. Work around this behavior by temporarily NUL-
terminating the current pathname component for the call to VOP_MKDIR().
https://github.com/openzfs/zfs/issues/15705 has been filed to track
a proper upstream fix for the issue at hand.
PR: 275871
Reported by: Karlo Miličević <karlo98.m@gmail.com>
Tested by: Karlo Miličević <karlo98.m@gmail.com>
Reviewed by: kib, olce
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D43818
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