From f1cb9d68b4d8789d7f48bd293772095430860d86 Mon Sep 17 00:00:00 2001 From: Salvatore Mesoraca Date: Sun, 11 Mar 2018 22:07:49 +0100 Subject: [PATCH] net: rds: drop VLA in rds_for_each_conn_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 Signed-off-by: David S. Miller --- net/rds/connection.c | 2 +- net/rds/ib.c | 3 +++ net/rds/rds.h | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/net/rds/connection.c b/net/rds/connection.c index 2da3176bf792..f80792c719eb 100644 --- a/net/rds/connection.c +++ b/net/rds/connection.c @@ -540,9 +540,9 @@ void rds_for_each_conn_info(struct socket *sock, unsigned int len, struct rds_info_iterator *iter, struct rds_info_lengths *lens, int (*visitor)(struct rds_connection *, void *), + u64 *buffer, size_t item_len) { - uint64_t buffer[(item_len + 7) / 8]; struct hlist_head *head; struct rds_connection *conn; size_t i; diff --git a/net/rds/ib.c b/net/rds/ib.c index 50a88f3e7e39..02deee29e7f1 100644 --- a/net/rds/ib.c +++ b/net/rds/ib.c @@ -321,8 +321,11 @@ static void rds_ib_ic_info(struct socket *sock, unsigned int len, struct rds_info_iterator *iter, struct rds_info_lengths *lens) { + u64 buffer[(sizeof(struct rds_info_rdma_connection) + 7) / 8]; + rds_for_each_conn_info(sock, len, iter, lens, rds_ib_conn_info_visitor, + buffer, sizeof(struct rds_info_rdma_connection)); } diff --git a/net/rds/rds.h b/net/rds/rds.h index 74cd27c661de..b04c333d9d1c 100644 --- a/net/rds/rds.h +++ b/net/rds/rds.h @@ -735,6 +735,7 @@ void rds_for_each_conn_info(struct socket *sock, unsigned int len, struct rds_info_iterator *iter, struct rds_info_lengths *lens, int (*visitor)(struct rds_connection *, void *), + u64 *buffer, size_t item_len); __printf(2, 3) -- 2.30.2