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Message-Id: <1520802470-17374-2-git-send-email-s.mesoraca16@gmail.com>
Date: Sun, 11 Mar 2018 22:07:50 +0100
From: Salvatore Mesoraca <s.mesoraca16@...il.com>
To: linux-kernel@...r.kernel.org
Cc: kernel-hardening@...ts.openwall.com,
linux-rdma@...r.kernel.org,
netdev@...r.kernel.org,
"David S. Miller" <davem@...emloft.net>,
Kees Cook <keescook@...omium.org>,
Salvatore Mesoraca <s.mesoraca16@...il.com>,
Santosh Shilimkar <santosh.shilimkar@...cle.com>
Subject: [PATCH 2/2] net: rds: drop VLA in rds_walk_conn_path_info()
Avoid VLA[1] by using an already allocated buffer passed
by the caller.
[1] https://lkml.org/lkml/2018/3/7/621
Signed-off-by: Salvatore Mesoraca <s.mesoraca16@...il.com>
---
net/rds/connection.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/rds/connection.c b/net/rds/connection.c
index f80792c..abef75d 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -578,9 +578,9 @@ static void rds_walk_conn_path_info(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens,
int (*visitor)(struct rds_conn_path *, void *),
+ u64 *buffer,
size_t item_len)
{
- u64 buffer[(item_len + 7) / 8];
struct hlist_head *head;
struct rds_connection *conn;
size_t i;
@@ -649,8 +649,11 @@ static void rds_conn_info(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens)
{
+ u64 buffer[(sizeof(struct rds_info_connection) + 7) / 8];
+
rds_walk_conn_path_info(sock, len, iter, lens,
rds_conn_info_visitor,
+ buffer,
sizeof(struct rds_info_connection));
}
--
1.9.1
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