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f2fs: fix to do sanity check on blocks for inline_data inode

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inode can be fuzzed, so it can has F2FS_INLINE_DATA flag and valid
i_blocks/i_nid value, this patch supports to do extra sanity check
to detect such corrupted state.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2024-05-21 14:23:18 +08:00 committed by Jaegeuk Kim
parent fc01008c92
commit c240c87bcd
3 changed files with 21 additions and 3 deletions
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2
fs/f2fs/f2fs.h
View File

@ -4149,7 +4149,7 @@ extern struct kmem_cache *f2fs_inode_entry_slab;
* inline.c
*/
bool f2fs_may_inline_data(struct inode *inode);
bool f2fs_sanity_check_inline_data(struct inode *inode);
bool f2fs_sanity_check_inline_data(struct inode *inode, struct page *ipage);
bool f2fs_may_inline_dentry(struct inode *inode);
void f2fs_do_read_inline_data(struct folio *folio, struct page *ipage);
void f2fs_truncate_inline_inode(struct inode *inode,

20
fs/f2fs/inline.c
View File

@ -33,11 +33,29 @@ bool f2fs_may_inline_data(struct inode *inode)
return !f2fs_post_read_required(inode);
}
bool f2fs_sanity_check_inline_data(struct inode *inode)
static bool inode_has_blocks(struct inode *inode, struct page *ipage)
{
struct f2fs_inode *ri = F2FS_INODE(ipage);
int i;
if (F2FS_HAS_BLOCKS(inode))
return true;
for (i = 0; i < DEF_NIDS_PER_INODE; i++) {
if (ri->i_nid[i])
return true;
}
return false;
}
bool f2fs_sanity_check_inline_data(struct inode *inode, struct page *ipage)
{
if (!f2fs_has_inline_data(inode))
return false;
if (inode_has_blocks(inode, ipage))
return false;
if (!support_inline_data(inode))
return true;

2
fs/f2fs/inode.c
View File

@ -344,7 +344,7 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page)
}
}
if (f2fs_sanity_check_inline_data(inode)) {
if (f2fs_sanity_check_inline_data(inode, node_page)) {
f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_data, run fsck to fix",
__func__, inode->i_ino, inode->i_mode);
return false;