Larger than supported value can lead to array read/write overflow.
Reported-by: Colin Ian King <colin.k...@canonical.com>
Signed-off-by: Santosh Shilimkar <santosh.shilim...@oracle.com>
---
net/rds/af_rds.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index fd821740..b405f77 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -310,6 +310,9 @@ static int rds_recv_track_latency(struct rds_sock *rs, char
__user *optval,
if (copy_from_user(&trace, optval, sizeof(trace)))
return -EFAULT;
+ if (trace.rx_traces > RDS_MSG_RX_DGRAM_TRACE_MAX)
+ return -EFAULT;
+
rs->rs_rx_traces = trace.rx_traces;
for (i = 0; i < rs->rs_rx_traces; i++) {
if (trace.rx_trace_pos[i] > RDS_MSG_RX_DGRAM_TRACE_MAX) {
--
1.9.1
