On 2024/3/4 11:53, Gao Xiang wrote:
syzbot reports a KMSAN reproducer [1] which generates a crafted
filesystem image and causes IMA to read uninitialized page cache.
Later, (rq->outputsize > rq->inputsize) will be formally supported
after either large uncompressed pclusters (> block size) or big
lclusters are landed. However, currently there is no way to generate
such filesystems by using mkfs.erofs.
Thus, let's mark this condition as unsupported for now.
[1] https://lore.kernel.org/r/[email protected]
Reported-by: [email protected]
Fixes: 1ca01520148a ("erofs: refine z_erofs_transform_plain() for sub-page block
support")
Signed-off-by: Gao Xiang <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Thanks,
