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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 <dlansky@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Dedy Lansky 2018-08-23 14:47:13 +03:00 committed by Kalle Valo
parent b9010f105f
commit 4405b632e3
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/ath/wil6210/debugfs.c
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@ -1237,6 +1237,9 @@ static int wil_rx_buff_mgmt_debugfs_show(struct seq_file *s, void *data)
int num_active; int num_active;
int num_free; int num_free;
if (!rbm->buff_arr)
return -EINVAL;
seq_printf(s, " size = %zu\n", rbm->size); seq_printf(s, " size = %zu\n", rbm->size);
seq_printf(s, " free_list_empty_cnt = %lu\n", seq_printf(s, " free_list_empty_cnt = %lu\n",
rbm->free_list_empty_cnt); rbm->free_list_empty_cnt);