Re: [PATCH] f2fs: do more sanity check on inode

Jaegeuk Kim
2023-05-30T23:03:35Z

On 05/29, Chao Yu wrote:
> This patch does below changes:
> - clean up check condition
> - add sanity check for i_extra_isize w/ lower boundary
> - add sanity check for feature dependency
> - check i_extra_isize only if f2fs_has_extra_attr() is true

Could you describe what is the current problem?

>
> Signed-off-by: Chao Yu <chao@kernel.org>
> ---
> fs/f2fs/f2fs.h | 2 +
> fs/f2fs/inode.c | 108 +++++++++++++++++++++++++++++++-----------------
> 2 files changed, 72 insertions(+), 38 deletions(-)
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 9bd83fb28439..11c0bb12c686 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -3424,6 +3424,8 @@ static inline int get_inline_xattr_addrs(struct inode *inode)
> ((is_inode_flag_set(i, FI_ACL_MODE)) ? \
> (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
>
> +#define F2FS_MIN_EXTRA_ATTR_SIZE (sizeof(__le32))
> +
> #define F2FS_TOTAL_EXTRA_ATTR_SIZE \
> (offsetof(struct f2fs_inode, i_extra_end) - \
> offsetof(struct f2fs_inode, i_extra_isize)) \
> diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
> index 0a1748444329..1e49009831c1 100644
> --- a/fs/f2fs/inode.c
> +++ b/fs/f2fs/inode.c
> @@ -300,41 +300,79 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page)
> return false;
> }
>
> - if (f2fs_sb_has_flexible_inline_xattr(sbi)
> - && !f2fs_has_extra_attr(inode)) {
> - set_sbi_flag(sbi, SBI_NEED_FSCK);
> - f2fs_warn(sbi, "%s: corrupted inode ino=%lx, run fsck to fix.",
> - __func__, inode->i_ino);
> - return false;
> - }
> -
> - if (f2fs_has_extra_attr(inode) &&
> - !f2fs_sb_has_extra_attr(sbi)) {
> - set_sbi_flag(sbi, SBI_NEED_FSCK);
> - f2fs_warn(sbi, "%s: inode (ino=%lx) is with extra_attr, but extra_attr feature is off",
> - __func__, inode->i_ino);
> - return false;
> - }
> -
> - if (fi->i_extra_isize > F2FS_TOTAL_EXTRA_ATTR_SIZE ||
> + if (f2fs_has_extra_attr(inode)) {
> + if (!f2fs_sb_has_extra_attr(sbi)) {
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: inode (ino=%lx) is with extra_attr, but extra_attr feature is off",
> + __func__, inode->i_ino);
> + return false;
> + }
> + if (fi->i_extra_isize > F2FS_TOTAL_EXTRA_ATTR_SIZE ||
> + fi->i_extra_isize < F2FS_MIN_EXTRA_ATTR_SIZE ||
> fi->i_extra_isize % sizeof(__le32)) {
> - set_sbi_flag(sbi, SBI_NEED_FSCK);
> - f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_extra_isize: %d, max: %zu",
> - __func__, inode->i_ino, fi->i_extra_isize,
> - F2FS_TOTAL_EXTRA_ATTR_SIZE);
> - return false;
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_extra_isize: %d, max: %zu",
> + __func__, inode->i_ino, fi->i_extra_isize,
> + F2FS_TOTAL_EXTRA_ATTR_SIZE);
> + return false;
> + }
> + if (f2fs_sb_has_flexible_inline_xattr(sbi) &&
> + f2fs_has_inline_xattr(inode) &&
> + (!fi->i_inline_xattr_size ||
> + fi->i_inline_xattr_size > MAX_INLINE_XATTR_SIZE)) {
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_inline_xattr_size: %d, max: %zu",
> + __func__, inode->i_ino, fi->i_inline_xattr_size,
> + MAX_INLINE_XATTR_SIZE);
> + return false;
> + }
> + if (f2fs_sb_has_compression(sbi) &&
> + fi->i_flags & F2FS_COMPR_FL &&
> + F2FS_FITS_IN_INODE(ri, fi->i_extra_isize,
> + i_compress_flag)) {
> + if (!sanity_check_compress_inode(inode, ri))
> + return false;
> + }
> + } else {
> + if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: corrupted inode ino=%lx, run fsck to fix.",
> + __func__, inode->i_ino);
> + return false;
> + }
> }
>
> - if (f2fs_has_extra_attr(inode) &&
> - f2fs_sb_has_flexible_inline_xattr(sbi) &&
> - f2fs_has_inline_xattr(inode) &&
> - (!fi->i_inline_xattr_size ||
> - fi->i_inline_xattr_size > MAX_INLINE_XATTR_SIZE)) {
> - set_sbi_flag(sbi, SBI_NEED_FSCK);
> - f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_inline_xattr_size: %d, max: %zu",
> - __func__, inode->i_ino, fi->i_inline_xattr_size,
> - MAX_INLINE_XATTR_SIZE);
> - return false;
> + if (!f2fs_sb_has_extra_attr(sbi)) {
> + if (f2fs_sb_has_project_quota(sbi)) {
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
> + __func__, inode->i_ino, F2FS_FEATURE_PRJQUOTA);
> + return false;
> + }
> + if (f2fs_sb_has_inode_chksum(sbi)) {
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
> + __func__, inode->i_ino, F2FS_FEATURE_INODE_CHKSUM);
> + return false;
> + }
> + if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
> + __func__, inode->i_ino, F2FS_FEATURE_FLEXIBLE_INLINE_XATTR);
> + return false;
> + }
> + if (f2fs_sb_has_inode_crtime(sbi)) {
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
> + __func__, inode->i_ino, F2FS_FEATURE_INODE_CRTIME);
> + return false;
> + }
> + if (f2fs_sb_has_compression(sbi)) {
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
> + __func__, inode->i_ino, F2FS_FEATURE_COMPRESSION);
> + return false;
> + }
> }
>
> if (f2fs_sanity_check_inline_data(inode)) {
> @@ -358,12 +396,6 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page)
> return false;
> }
>
> - if (f2fs_has_extra_attr(inode) && f2fs_sb_has_compression(sbi) &&
> - fi->i_flags & F2FS_COMPR_FL &&
> - F2FS_FITS_IN_INODE(ri, fi->i_extra_isize,
> - i_compress_flag))
> - return sanity_check_compress_inode(inode, ri);
> -
> return true;
> }
>
> --
> 2.40.1