From: Colin King <colin.king@canonical.com>
To: Felix Fietkau <nbd@nbd.name>,
Johannes Berg <johannes@sipsolutions.net>,
"David S . Miller" <davem@davemloft.net>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH][next] mac80211: minstrel_ht: fix infinite loop because supported is not being shifted
Date: Thu, 22 Aug 2019 13:20:34 +0100 [thread overview]
Message-ID: <20190822122034.28664-1-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
Currently the for-loop will spin forever if variable supported is
non-zero because supported is never changed. Fix this by adding in
the missing right shift of supported.
Addresses-Coverity: ("Infinite loop")
Fixes: 48cb39522a9d ("mac80211: minstrel_ht: improve rate probing for devices with static fallback")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
net/mac80211/rc80211_minstrel_ht.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index a01168514840..0ef2633349b5 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -634,7 +634,7 @@ minstrel_ht_rate_sample_switch(struct minstrel_priv *mp,
u16 supported = mi->supported[g_idx];
supported >>= mi->max_tp_rate[0] % MCS_GROUP_RATES;
- for (i = 0; supported; i++) {
+ for (i = 0; supported; supported >>= 1, i++) {
if (!(supported & 1))
continue;
--
2.20.1
next reply other threads:[~2019-08-22 12:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-22 12:20 Colin King [this message]
2019-08-23 11:07 ` [PATCH][next] mac80211: minstrel_ht: fix infinite loop because supported is not being shifted Felix Fietkau
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