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-rw-r--r--drivers/message/fusion/mptctl.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index 70bb7530b22c..fc7393729081 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -1859,6 +1859,15 @@ mptctl_do_mpt_command (struct mpt_ioctl_command karg, void __user *mfPtr)
}
spin_unlock_irqrestore(&ioc->taskmgmt_lock, flags);
+ /* Basic sanity checks to prevent underflows or integer overflows */
+ if (karg.maxReplyBytes < 0 ||
+ karg.dataInSize < 0 ||
+ karg.dataOutSize < 0 ||
+ karg.dataSgeOffset < 0 ||
+ karg.maxSenseBytes < 0 ||
+ karg.dataSgeOffset > ioc->req_sz / 4)
+ return -EINVAL;
+
/* Verify that the final request frame will not be too large.
*/
sz = karg.dataSgeOffset * 4;