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net: rds: drop VLA in rds_walk_conn_path_info()

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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@gmail.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Salvatore Mesoraca 2018-03-11 22:07:50 +01:00 committed by David S. Miller
parent f1cb9d68b4
commit b2c9272ae7
1 changed files with 4 additions and 1 deletions
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5
net/rds/connection.c
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@ -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_iterator *iter,
struct rds_info_lengths *lens, struct rds_info_lengths *lens,
int (*visitor)(struct rds_conn_path *, void *), int (*visitor)(struct rds_conn_path *, void *),
u64 *buffer,
size_t item_len) size_t item_len)
{ {
u64 buffer[(item_len + 7) / 8];
struct hlist_head *head; struct hlist_head *head;
struct rds_connection *conn; struct rds_connection *conn;
size_t i; 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_iterator *iter,
struct rds_info_lengths *lens) struct rds_info_lengths *lens)
{ {
u64 buffer[(sizeof(struct rds_info_connection) + 7) / 8];
rds_walk_conn_path_info(sock, len, iter, lens, rds_walk_conn_path_info(sock, len, iter, lens,
rds_conn_info_visitor, rds_conn_info_visitor,
buffer,
sizeof(struct rds_info_connection)); sizeof(struct rds_info_connection));
} }