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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 <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2019-01-08 10:21:24 +08:00 committed by Jaegeuk Kim
parent c20e57b32d
commit ddf06b753a
1 changed files with 4 additions and 0 deletions
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4
fs/f2fs/dir.c
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@ -800,6 +800,10 @@ int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
if (de->name_len == 0) { if (de->name_len == 0) {
bit_pos++; bit_pos++;
ctx->pos = start_pos + 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; continue;
} }