tag 7d6ff3da36328ed0af6ab35aaa61682eb9cd048f
tagger Jan Kara <jack@suse.cz> Thu Jan 05 14:37:21 2023 +0100
object e86812bfac97e23c9ad9e607c370c63b2e5b4722

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commit e86812bfac97e23c9ad9e607c370c63b2e5b4722
author Jan Kara <jack@suse.cz> Tue Jan 03 10:03:35 2023 +0100
committer Jan Kara <jack@suse.cz> Tue Jan 03 10:46:11 2023 +0100
tree f8a14405eb08b3e922a5b17fb52aef5cca7de4ab
parent 453bc25de0a55a2f70d8a38491de1d4ec36b2f8b

udf: Detect system inodes linked into directory hierarchy

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: syzbot+38695a20b8addcbc1084@syzkaller.appspotmail.com
Signed-off-by: Jan Kara <jack@suse.cz>