[PATCH 5.17 088/219] mac80211: fix ht_capa printout in debugfs

Greg Kroah-Hartman
2022-04-18T12:26:51Z

From: Ben Greear <greearb@candelatech.com>

[ Upstream commit fb4bccd863ccccd36ad000601856609e259a1859 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/mac80211/debugfs_sta.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 9479f2787ea7..88d9cc945a21 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;
--
2.35.1