[PATCH 6/6] staging: erofs: avoid endless loop of invalid lookback distance 0

[Chao Yu]

On 2019-8-19 18:34, Gao Xiang wrote:
> As reported by erofs-utils fuzzer, Lookback distance should
> be a positive number, so it should be actually looked back
> rather than spinning.
> 
> Fixes: 02827e1796b3 ("staging: erofs: add erofs_map_blocks_iter")
> Cc: <stable at vger.kernel.org> # 4.19+
> Signed-off-by: Gao Xiang <gaoxiang25 at huawei.com>

Reviewed-by: Chao Yu <yuchao0 at huawei.com>

Thanks,