4.14-stable review patch. If anyone has any objections, please let me know.
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This was done as part of commit 5d64600d4f33 "f2fs: avoid bug_on on corrupted inode" upstream, but the specific check that commit added is not applicable to 4.14.
Cc: Jaegeuk Kim jaegeuk@kernel.org Cc: Chao Yu yuchao0@huawei.com Signed-off-by: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/inode.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index b1c0eb433841..917a6c3d5649 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -180,6 +180,13 @@ void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page) ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page)); }
+static bool sanity_check_inode(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + + return true; +} + static int do_read_inode(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); @@ -281,6 +288,10 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) ret = do_read_inode(inode); if (ret) goto bad_inode; + if (!sanity_check_inode(inode)) { + ret = -EINVAL; + goto bad_inode; + } make_now: if (ino == F2FS_NODE_INO(sbi)) { inode->i_mapping->a_ops = &f2fs_node_aops;