diff mbox series

[9/9] wil6210: fix invalid memory access for rx_buff_mgmt debugfs

Message ID 1535024833-15178-10-git-send-email-merez@codeaurora.org (mailing list archive)
State Accepted
Commit 4405b632e3da839defec966e4b0be44d0c5e3102
Delegated to: Kalle Valo
Headers show
Series wil6210 patches | expand

Commit Message

Maya Erez Aug. 23, 2018, 11:47 a.m. UTC 
From: Dedy Lansky <dlansky@codeaurora.org>

Check rx_buff_mgmt is allocated before accessing its internal fields.

Signed-off-by: Dedy Lansky <dlansky@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
---
 drivers/net/wireless/ath/wil6210/debugfs.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index 6973333..965c61b 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);