From: Ben Greear <greearb@candelatech.com>
Date: Wed, 6 Apr 2022 17:56:59 +0000 (-0700)
Subject: mac80211: fix ht_capa printout in debugfs
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=fb4bccd863ccccd36ad000601856609e259a1859;p=kernel.git

mac80211: fix ht_capa printout in debugfs

Don't use sizeof(pointer) when calculating scnprintf offset.

Fixes: 01f84f0ed3b4 ("mac80211: reduce stack usage in debugfs")
Signed-off-by: Ben Greear <greearb@candelatech.com>
Link: https://lore.kernel.org/r/20220406175659.20611-1-greearb@candelatech.com
[correct the Fixes tag]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 9479f2787ea79..88d9cc945a216 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -441,7 +441,7 @@ static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
 #define PRINT_HT_CAP(_cond, _str) \
 	do { \
 	if (_cond) \
-			p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
+			p += scnprintf(p, bufsz + buf - p, "\t" _str "\n"); \
 	} while (0)
 	char *buf, *p;
 	int i;