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| author | Gao Xiang <hsiangkao@redhat.com> | 2021-03-29 03:36:14 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@redhat.com> | 2021-03-29 05:20:45 +0300 |
| commit | 24a806d849c0b0c1d0cd6a6b93ba4ae4c0ec9f08 (patch) | |
| tree | 9cae419066736369e8d0ca46508166c323bb4016 /fs/erofs | |
| parent | 8137824eddd2e790c61c70c20d70a087faca95fa (diff) | |
| download | linux-24a806d849c0b0c1d0cd6a6b93ba4ae4c0ec9f08.tar.xz | |
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: <stable@vger.kernel.org> # 4.19+
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Diffstat (limited to 'fs/erofs')
| -rw-r--r-- | fs/erofs/erofs_fs.h | 3 | ||||
| -rw-r--r-- | fs/erofs/inode.c | 7 |
2 files changed, 10 insertions, 0 deletions
diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h index 9ad1615f4474..e8d04d808fa6 100644 --- a/fs/erofs/erofs_fs.h +++ b/fs/erofs/erofs_fs.h @@ -75,6 +75,9 @@ static inline bool erofs_inode_is_data_compressed(unsigned int datamode) #define EROFS_I_VERSION_BIT 0 #define EROFS_I_DATALAYOUT_BIT 1 +#define EROFS_I_ALL \ + ((1 << (EROFS_I_DATALAYOUT_BIT + EROFS_I_DATALAYOUT_BITS)) - 1) + /* 32-byte reduced form of an ondisk inode */ struct erofs_inode_compact { __le16 i_format; /* inode format hints */ 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", |