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erofs: add unsupported inode i_format check
commit 24a806d849c0b0c1d0cd6a6b93ba4ae4c0ec9f08 upstream.
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: 431339ba90
("staging: erofs: add inode operations")
Cc: <stable@vger.kernel.org> # 4.19+
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
34ec706bf0
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dbaf435ddf
@ -75,6 +75,9 @@ static inline bool erofs_inode_is_data_compressed(unsigned int datamode)
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#define EROFS_I_VERSION_BIT 0
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#define EROFS_I_DATALAYOUT_BIT 1
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#define EROFS_I_ALL \
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((1 << (EROFS_I_DATALAYOUT_BIT + EROFS_I_DATALAYOUT_BITS)) - 1)
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/* 32-byte reduced form of an ondisk inode */
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struct erofs_inode_compact {
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__le16 i_format; /* inode format hints */
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@ -44,6 +44,13 @@ static struct page *erofs_read_inode(struct inode *inode,
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dic = page_address(page) + *ofs;
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ifmt = le16_to_cpu(dic->i_format);
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if (ifmt & ~EROFS_I_ALL) {
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erofs_err(inode->i_sb, "unsupported i_format %u of nid %llu",
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ifmt, vi->nid);
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err = -EOPNOTSUPP;
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goto err_out;
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}
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vi->datalayout = erofs_inode_datalayout(ifmt);
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if (vi->datalayout >= EROFS_INODE_DATALAYOUT_MAX) {
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erofs_err(inode->i_sb, "unsupported datalayout %u of nid %llu",
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