From 24a806d849c0b0c1d0cd6a6b93ba4ae4c0ec9f08 Mon Sep 17 00:00:00 2001 From: Gao Xiang Date: Mon, 29 Mar 2021 08:36:14 +0800 Subject: erofs: add unsupported inode i_format check If any unknown i_format fields are set (may be of some new incompat inode features), mark such inode as unsupported. Just in case of any new incompat i_format fields added in the future. Link: https://lore.kernel.org/r/20210329003614.6583-1-hsiangkao@aol.com Fixes: 431339ba9042 ("staging: erofs: add inode operations") Cc: # 4.19+ Signed-off-by: Gao Xiang --- fs/erofs/inode.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'fs/erofs/inode.c') diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c index 119fdce1b520..7ed2d7391692 100644 --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -44,6 +44,13 @@ static struct page *erofs_read_inode(struct inode *inode, dic = page_address(page) + *ofs; ifmt = le16_to_cpu(dic->i_format); + if (ifmt & ~EROFS_I_ALL) { + erofs_err(inode->i_sb, "unsupported i_format %u of nid %llu", + ifmt, vi->nid); + err = -EOPNOTSUPP; + goto err_out; + } + vi->datalayout = erofs_inode_datalayout(ifmt); if (vi->datalayout >= EROFS_INODE_DATALAYOUT_MAX) { erofs_err(inode->i_sb, "unsupported datalayout %u of nid %llu", -- cgit v1.2.3