mac80211: don't remove tainted keys after not programming

When a key is tainted during resume, it is no longer programmed
into the device; however, it's uploaded flag may (will) be set.
Clear the flag when not programming it because it's tainted to
avoid attempting to remove it again later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 4712150dc210..434a91ad12c8 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -94,8 +94,17 @@ static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
 
         might_sleep();
 
-        if (key->flags & KEY_FLAG_TAINTED)
+        if (key->flags & KEY_FLAG_TAINTED) {
+                /* If we get here, it's during resume and the key is
+                 * tainted so shouldn't be used/programmed any more.
+                 * However, its flags may still indicate that it was
+                 * programmed into the device (since we're in resume)
+                 * so clear that flag now to avoid trying to remove
+                 * it again later.
+                 */
+                key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
                 return -EINVAL;
+        }
 
         if (!key->local->ops->set_key)
                 goto out_unsupported;