linux-kernel - Re: [syzbot] Re: UBSAN: array-index-out-of-bounds in htc_issue

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Message-ID: <671b3028.050a0220.381c35.000d.GAE@google.com>
Date: Thu, 24 Oct 2024 22:44:08 -0700
From: syzbot <syzbot+93cbd5fbb85814306ba1@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Re: UBSAN: array-index-out-of-bounds in htc_issue_send

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***

Subject: Re: UBSAN: array-index-out-of-bounds in htc_issue_send
Author: dmantipov@...dex.ru

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next eaed5fc0c322d75cfcdbc7a16c0c5023d9e4f6fe

diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c
index eb631fd3336d..a5bc0a5dfe7c 100644
--- a/drivers/net/wireless/ath/ath9k/htc_hst.c
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.c
@@ -294,6 +294,9 @@ int htc_connect_service(struct htc_target *target,
  		return -ETIMEDOUT;
  	}

+	if (unlikely(target->conn_rsp_epid == ENDPOINT_UNUSED))
+		return -ENODEV;
+
  	*conn_rsp_epid = target->conn_rsp_epid;
  	return 0;
  err: