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Commit 1dc71eeb authored by Jan Kara's avatar Jan Kara Committed by Greg Kroah-Hartman
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udf: Detect system inodes linked into directory hierarchy



[ Upstream commit 85a37983ec69cc9fcd188bc37c4de15ee326355a ]

When UDF filesystem is corrupted, hidden system inodes can be linked
into directory hierarchy which is an avenue for further serious
corruption of the filesystem and kernel confusion as noticed by syzbot
fuzzed images. Refuse to access system inodes linked into directory
hierarchy and vice versa.

CC: stable@vger.kernel.org
Reported-by: default avatar <syzbot+38695a20b8addcbc1084@syzkaller.appspotmail.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent ec852375
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