diff options
| author | Rebecca Mckeever <remckee0@gmail.com> | 2022-04-20 07:23:28 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-22 16:41:28 +0200 |
| commit | 17c8129e06241b635c7945d109eec498301628d3 (patch) | |
| tree | 66cbf6d42d19c2665a1b8b4cf31f4cd3e3e19483 /drivers/staging | |
| parent | 55de6cb7f81c82dea1bdb12cd3818280af7abd87 (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')
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); |