From: Santosh Shilimkar <santosh.shilimkar@oracle.com>
To: netdev@vger.kernel.org, davem@davemloft.net
Cc: linux-kernel@vger.kernel.org,
Santosh Shilimkar <santosh.shilimkar@oracle.com>
Subject: [net-next][PATCH] RDS: validate the requested traces user input against max supported
Date: Fri, 6 Jan 2017 10:44:15 -0800 [thread overview]
Message-ID: <1483728255-9111-1-git-send-email-santosh.shilimkar@oracle.com> (raw)
Larger than supported value can lead to array read/write overflow.
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@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
next reply other threads:[~2017-01-06 18:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-06 18:44 Santosh Shilimkar [this message]
2017-01-07 3:14 ` [net-next][PATCH] RDS: validate the requested traces user input against max supported David Miller
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