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Date: Mon, 12 Jun 2023 13:16:11 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: Chao Yu <chao@...nel.org>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] f2fs: do more sanity check on inode
On 05/31, Chao Yu wrote:
> There are several issues in sanity_check_inode():
> - The code looks not clean, it checks extra_attr related condition
> dispersively.
> - It missed to check i_extra_isize w/ lower boundary
> - It missed to check feature dependency: prjquota, inode_chksum,
> inode_crtime, compression features rely on extra_attr feature.
> - It's not necessary to check i_extra_isize due to it will only
> be assigned to non-zero value if f2fs_has_extra_attr() is true
> in do_read_inode().
>
> Fix them all in this patch.
>
> Signed-off-by: Chao Yu <chao@...nel.org>
> ---
> v2:
> - describe current problem in commit message
> 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 7e406da8b4b3..619ad49993ce 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -3413,6 +3413,8 @@ 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)) {
Modified to combine else if.
> + 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
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