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Ryusuke Konishi 79663a15a1 nilfs2: reject invalid file types when reading inodes
commit 4aead50caf upstream.

To prevent inodes with invalid file types from tripping through the vfs
and causing malfunctions or assertion failures, add a missing sanity check
when reading an inode from a block device.  If the file type is not valid,
treat it as a filesystem error.

Link: https://lkml.kernel.org/r/20250710134952.29862-1-konishi.ryusuke@gmail.com
Fixes: 05fe58fdc1 ("nilfs2: inode operations")
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Reported-by: syzbot+895c23f6917da440ed0d@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=895c23f6917da440ed0d
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-08-01 09:48:43 +01:00
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Linux kernel
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