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(parent: fc8033a) | patch
udf: Detect system inodes linked into directory hierarchy
authorJan Kara <jack@suse.cz>
Tue, 3 Jan 2023 09:03:35 +0000 (10:03 +0100)
committerJan Kara <jack@suse.cz>
Mon, 9 Jan 2023 09:39:53 +0000 (10:39 +0100)
commit85a37983ec69cc9fcd188bc37c4de15ee326355a
tree65435e3e1f74585720820943721671505a43e478tree | snapshot
parentfc8033a34a3ca7d23353e645e6dde5d364ac5f12commit | diff
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>
fs/udf/inode.c diff | blob | history
Domain: System / Kernel;