[PATCH] f2fs: do more sanity check on inode

Chao Yu
2023-05-29T10:28:08Z

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

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