From ddf06b753a8573eb0323d91efeaffe397f7b673d Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Tue, 8 Jan 2019 10:21:24 +0800 Subject: [PATCH] f2fs: fix to trigger fsck if dirent.name_len is zero While traversing dirents in f2fs_fill_dentries(), if bitmap is valid, filename length should not be zero, otherwise, directory structure consistency could be corrupted, in this case, let's print related info and set SBI_NEED_FSCK to trigger fsck for repairing. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/dir.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 50d0d36280fa..926166528cd4 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -800,6 +800,10 @@ int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d, if (de->name_len == 0) { bit_pos++; ctx->pos = start_pos + bit_pos; + printk_ratelimited( + "%s, invalid namelen(0), ino:%u, run fsck to fix.", + KERN_WARNING, le32_to_cpu(de->ino)); + set_sbi_flag(sbi, SBI_NEED_FSCK); continue; }