exfat: fix uninit-value in __exfat_get_dentry_set

There is no check if stream size and start_clu are invalid.
If start_clu is EOF cluster and stream size is 4096, It will
cause uninit value access. because ei->hint_femp.eidx could
be 128(if cluster size is 4K) and wrong hint will allocate
next cluster. and this cluster will be same with the cluster
that is allocated by exfat_extend_valid_size(). The previous
patch will check invalid start_clu, but for clarity, initialize
hint_femp.eidx to zero.

Cc: [email protected]
Reported-by: [email protected]
Tested-by: [email protected]
Reviewed-by: Yuezhang Mo <[email protected]>
Signed-off-by: Namjae Jeon <[email protected]>

0 files changed, 0 insertions, 0 deletions