tree 9530ba3aebae49015bd375d0476b887969af039c
parent 8ddcc9493e8515fe888ad53c683ba8e8b96e5eb4
author Gao Xiang <hsiangkao@aol.com> 1606487639 +0800
committer Gao Xiang <hsiangkao@aol.com> 1607156574 +0800

erofs-utils: xattr: fix OOB access due to alignment

erofs_buf_write_bhops can only be safely used for block-aligned
buffers, otherwise, it could write random out-of-bound data due
to buffer alignment. Such random data is meaningless but it does
harm to reproducable builds.

Link: https://lore.kernel.org/r/20201127143359.667374-1-hsiangkao@redhat.com
Fixes: 116ac0a254fc ("erofs-utils: introduce shared xattr support")
Reported-by: Huang Jianan <huangjianan@oppo.com>
Reviewed-by: Li Guifu <bluce.lee@aliyun.com>
Signed-off-by: Gao Xiang <hsiangkao@aol.com>