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ath6kl: Array index out of bounds check

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The variable assigned_ep can be assigned value of -1 and is never
checked if it equals -1. So the endpoint array can have -1  as the index
value and can be out of bounds.

The value of assigned_ep is checked for -1 and is ensured that the
endpoint array doesn't go out of bounds.

Signed-off-by: Pandiyarajan Pitchaimuthu <c_ppitch@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Pandiyarajan Pitchaimuthu 2012-09-21 20:11:46 +05:30 • committed by Kalle Valo
commit 86aa7c1efc
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/ath/ath6kl/htc_mbox.c
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@ -2492,7 +2492,8 @@ static int ath6kl_htc_mbox_conn_service(struct htc_target *target,
max_msg_sz = le16_to_cpu(resp_msg->max_msg_sz);
}
if (assigned_ep >= ENDPOINT_MAX || !max_msg_sz) {
if (WARN_ON_ONCE(assigned_ep == ENDPOINT_UNUSED ||
assigned_ep >= ENDPOINT_MAX || !max_msg_sz)) {
status = -ENOMEM;
goto fail_tx;
}