Dentry bitmap is not enough to detect incorrect dentries. So this patch also checks the namelen value of a dentry.
Signed-off-by: Gong Chen <gongch...@huawei.com> Signed-off-by: Sheng Yong <shengyo...@huawei.com> --- fs/f2fs/dir.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index c0c845da12fa..07cfd826f090 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -810,7 +810,8 @@ int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d, /* check memory boundary before moving forward */ bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); - if (unlikely(bit_pos > d->max)) { + if (unlikely(bit_pos > d->max) || + le16_to_cpu(de->name_len > F2FS_NAME_LEN)) { f2fs_msg(sbi->sb, KERN_WARNING, "%s: corrupted namelen=%d, run fsck to fix.", __func__, le16_to_cpu(de->name_len)); -- 2.17.1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel