linux-kernel - [PATCH] staging: r8188eu: Prevent infinite loop

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Date:   Sun, 14 Aug 2022 12:44:04 -0500
From:   Larry Finger <Larry.Finger@...inger.net>
To:     gregkh@...uxfoundation.org
Cc:     phil@...lpotter.co.uk, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        Larry Finger <Larry.Finger@...inger.net>
Subject: [PATCH] staging: r8188eu: Prevent infinite loop

---
 drivers/staging/r8188eu/core/rtw_ieee80211.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/r8188eu/core/rtw_ieee80211.c b/drivers/staging/r8188eu/core/rtw_ieee80211.c
index bc8543ea2e66..0a5f08427385 100644
--- a/drivers/staging/r8188eu/core/rtw_ieee80211.c
+++ b/drivers/staging/r8188eu/core/rtw_ieee80211.c
@@ -531,6 +531,7 @@ u8 *rtw_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen)
 	uint cnt;
 	u8 *wpsie_ptr = NULL;
 	u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};
+	int loop_max = 0;
 
 	if (wps_ielen)
 		*wps_ielen = 0;
@@ -557,6 +558,8 @@ u8 *rtw_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen)
 			break;
 		}
 		cnt += in_ie[cnt + 1] + 2; /* goto next */
+		if (++loop > 1000)
+			return NULL;
 	}
 	return wpsie_ptr;
 }
-- 
2.37.1