[SCSI] libiscsi_tcp: fix max_r2t manipulation

Problem description from Xi Wang:
A large max_r2t could lead to integer overflow in subsequent call to
iscsi_tcp_r2tpool_alloc(), allocating a smaller buffer than expected
and leading to out-of-bounds write.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 2e42e9a0e0b6..6e33386a3898 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -268,7 +268,7 @@ struct iscsi_session {
         int                     lu_reset_timeout;
         int                     tgt_reset_timeout;
         int                     initial_r2t_en;
-        unsigned                max_r2t;
+        unsigned short          max_r2t;
         int                     imm_data_en;
         unsigned                first_burst;
         unsigned                max_burst;