benet: Avoid potential null deref in be_cmd_get_seeprom_data()
authorAjit Khaparde <ajit.khaparde@emulex.com>
Fri, 4 Feb 2011 17:18:28 +0000 (17:18 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 6 Feb 2011 01:58:18 +0000 (17:58 -0800)
Found by: Jesper Juhl <jj@chaosbits.net>

Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/benet/be_cmds.c

index 0c7811faf72cca865eb7725a76cc0b4c4ecbef7d..a179cc6d79f2e636aad7ac5ca4899855f8ec8de0 100644 (file)
@@ -1786,6 +1786,10 @@ int be_cmd_get_seeprom_data(struct be_adapter *adapter,
        spin_lock_bh(&adapter->mcc_lock);
 
        wrb = wrb_from_mccq(adapter);
+       if (!wrb) {
+               status = -EBUSY;
+               goto err;
+       }
        req = nonemb_cmd->va;
        sge = nonembedded_sgl(wrb);
 
@@ -1801,6 +1805,7 @@ int be_cmd_get_seeprom_data(struct be_adapter *adapter,
 
        status = be_mcc_notify_wait(adapter);
 
+err:
        spin_unlock_bh(&adapter->mcc_lock);
        return status;
 }