From: Dedy Lansky <dlansky@xxxxxxxxxxxxxx> [ Upstream commit 4405b632e3da839defec966e4b0be44d0c5e3102 ] Check rx_buff_mgmt is allocated before accessing its internal fields. Signed-off-by: Dedy Lansky <dlansky@xxxxxxxxxxxxxx> Signed-off-by: Maya Erez <merez@xxxxxxxxxxxxxx> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 51c3330bc316f..ceace95b1595c 100644 --- a/drivers/net/wireless/ath/wil6210/debugfs.c +++ b/drivers/net/wireless/ath/wil6210/debugfs.c @@ -1263,6 +1263,9 @@ 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); -- 2.20.1
