Patch prevents call set_wep_key() with zero key length. That fix long
standing regression since commit c0380693520b1a1e4f756799a0edc379378b462a
"airo: clean up WEP key operations". Additionally print call trace when
someone will try to use improper parameters, and remove key.len = 0
assignment, because it is in not possible code path.
v1->v2
Return instantly from set_wep_key() when keylen == 0.
Reported-and-bisected-by: Chris Siebenmann <cks-rhbugzilla@xxxxxxxxxxxxxx>
Cc: Dan Williams <dcbw@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
---
drivers/net/wireless/airo.c | 33 ++++++++++++++++++---------------
1 files changed, 18 insertions(+), 15 deletions(-)
diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index 4331d67..01bffc2 100644
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -5254,11 +5254,8 @@ static int set_wep_key(struct airo_info *ai, u16 index, const char *key,
WepKeyRid wkr;
int rc;
- if (keylen == 0) {
- airo_print_err(ai->dev->name, "%s: key length to set was zero",
- __func__);
+ if (WARN_ON(keylen == 0))
return -1;
- }
memset(&wkr, 0, sizeof(wkr));
wkr.len = cpu_to_le16(sizeof(wkr));
@@ -6405,11 +6402,7 @@ static int airo_set_encode(struct net_device *dev,
if (dwrq->length > MIN_KEY_SIZE)
key.len = MAX_KEY_SIZE;
else
- if (dwrq->length > 0)
- key.len = MIN_KEY_SIZE;
- else
- /* Disable the key */
- key.len = 0;
+ key.len = MIN_KEY_SIZE;
/* Check if the key is not marked as invalid */
if(!(dwrq->flags & IW_ENCODE_NOKEY)) {
/* Cleanup */
@@ -6590,12 +6583,22 @@ static int airo_set_encodeext(struct net_device *dev,
default:
return -EINVAL;
}
- /* Send the key to the card */
- rc = set_wep_key(local, idx, key.key, key.len, perm, 1);
- if (rc < 0) {
- airo_print_err(local->dev->name, "failed to set WEP key"
- " at index %d: %d.", idx, rc);
- return rc;
+ if (key.len == 0) {
+ rc = set_wep_tx_idx(local, idx, perm, 1);
+ if (rc < 0) {
+ airo_print_err(local->dev->name,
+ "failed to set WEP transmit index to %d: %d.",
+ idx, rc);
+ return rc;
+ }
+ } else {
+ rc = set_wep_key(local, idx, key.key, key.len, perm, 1);
+ if (rc < 0) {
+ airo_print_err(local->dev->name,
+ "failed to set WEP key at index %d: %d.",
+ idx, rc);
+ return rc;
+ }
}
}
--
1.6.2.5
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