From 4405b632e3da839defec966e4b0be44d0c5e3102 Mon Sep 17 00:00:00 2001 From: Dedy Lansky Date: Thu, 23 Aug 2018 14:47:13 +0300 Subject: [PATCH] wil6210: fix invalid memory access for rx_buff_mgmt debugfs Check rx_buff_mgmt is allocated before accessing its internal fields. Signed-off-by: Dedy Lansky Signed-off-by: Maya Erez Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/wil6210/debugfs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c index 6973333497c1d..965c61be8b793 100644 --- a/drivers/net/wireless/ath/wil6210/debugfs.c +++ b/drivers/net/wireless/ath/wil6210/debugfs.c @@ -1237,6 +1237,9 @@ static int wil_rx_buff_mgmt_debugfs_show(struct seq_file *s, void *data) int num_active; int num_free; + if (!rbm->buff_arr) + return -EINVAL; + seq_printf(s, " size = %zu\n", rbm->size); seq_printf(s, " free_list_empty_cnt = %lu\n", rbm->free_list_empty_cnt); -- 2.30.2