On Tue, Aug 24, 2021 at 10:50:15AM +0300, Dan Carpenter wrote:
> The "e" pointer is dereferenced before it has been checked for NULL.
> Move the dereference after the NULL check to prevent an Oops.
>
> Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Kari Argillander <kari.argillander@xxxxxxxxx>
> ---
> fs/ntfs3/index.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
> index 07d6dee0a4ba..489e0fffbc75 100644
> --- a/fs/ntfs3/index.c
> +++ b/fs/ntfs3/index.c
> @@ -556,11 +556,12 @@ static const struct NTFS_DE *hdr_find_split(const struct INDEX_HDR *hdr)
> size_t o;
> const struct NTFS_DE *e = hdr_first_de(hdr);
> u32 used_2 = le32_to_cpu(hdr->used) >> 1;
> - u16 esize = le16_to_cpu(e->size);
> + u16 esize;
>
> if (!e || de_is_last(e))
> return NULL;
>
> + esize = le16_to_cpu(e->size);
> for (o = le32_to_cpu(hdr->de_off) + esize; o < used_2; o += esize) {
> const struct NTFS_DE *p = e;
