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authorRebecca Mckeever <remckee0@gmail.com>2022-04-20 07:23:28 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-04-22 16:41:28 +0200
commit17c8129e06241b635c7945d109eec498301628d3 (patch)
tree66cbf6d42d19c2665a1b8b4cf31f4cd3e3e19483 /drivers/staging/rtl8192u
parent55de6cb7f81c82dea1bdb12cd3818280af7abd87 (diff)
staging: rtl8192u: change get_key functions to return 0 instead of -1
Currently, these three get_key functions return -1 when the provided len value is less a specific key length value, which can result in buffer overflow depending on how the returned value is used. These functions are used in three places in ieee80211/ieee80211_wx.c: ieee80211_wx_get_encode() : The behavior of this function will be unchanged. ieee80211_wx_get_encode_ext() : The result of the get_key function is written to ext->key_len, resulting in a buffer overflow if the result is negative. ieee80211_wx_set_encode() : The behavior of this function will change. When len is less than the key length value, it will set a default key of all 0. Suggested-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Rebecca Mckeever <remckee0@gmail.com> Link: https://lore.kernel.org/r/Yl/7QPKXer7YtXOs@bertie Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/rtl8192u')
-rw-r--r--drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c2
-rw-r--r--drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c2
-rw-r--r--drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c2
3 files changed, 3 insertions, 3 deletions
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c
index 101c28265e91..f17d07dad56d 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c
@@ -362,7 +362,7 @@ static int ieee80211_ccmp_get_key(void *key, int len, u8 *seq, void *priv)
struct ieee80211_ccmp_data *data = priv;
if (len < CCMP_TK_LEN)
- return -1;
+ return 0;
if (!data->key_set)
return 0;
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
index 689d8843f538..7b120b8cb982 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_tkip.c
@@ -637,7 +637,7 @@ static int ieee80211_tkip_get_key(void *key, int len, u8 *seq, void *priv)
struct ieee80211_tkip_data *tkey = priv;
if (len < TKIP_KEY_LEN)
- return -1;
+ return 0;
if (!tkey->key_set)
return 0;
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c
index 8a51ea1dd6e5..a2cdf3bfd1a4 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c
@@ -201,7 +201,7 @@ static int prism2_wep_get_key(void *key, int len, u8 *seq, void *priv)
struct prism2_wep_data *wep = priv;
if (len < wep->key_len)
- return -1;
+ return 0;
memcpy(key, wep->key, wep->key_len);