scsi: aacraid: Fix double-free on probe failure

aac_probe_one() calls hardware-specific init functions through the
aac_driver_ident::init pointer, all of which eventually call down to
aac_init_adapter().

If aac_init_adapter() fails after allocating memory for aac_dev::queues,
it frees the memory but does not clear that member.

After the hardware-specific init function returns an error,
aac_probe_one() goes down an error path that frees the memory pointed to
by aac_dev::queues, resulting.in a double-free.

Reported-by: Michael Gordon <m.gordon.zelenoborsky@gmail.com>
Link: https://bugs.debian.org/1075855
Fixes: 8e0c5ebde82b ("[SCSI] aacraid: Newer adapter communication iterface support")
Signed-off-by: Ben Hutchings <benh@debian.org>
Link: https://lore.kernel.org/r/ZsZvfqlQMveoL5KQ@decadent.org.uk
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index bd99c5492b7d49440705e9eb0470d820557a18e2..0f64b0244303767ab5bd88bc5a659a334a3e6088 100644 (file)
--- a/drivers/scsi/aacraid/comminit.c
+++ b/drivers/scsi/aacraid/comminit.c
@@ -642,6 +642,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev)
 
        if (aac_comm_init(dev)<0){
                kfree(dev->queues);
+               dev->queues = NULL;
                return NULL;
        }
        /*
@@ -649,6 +650,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev)
         */
        if (aac_fib_setup(dev) < 0) {
                kfree(dev->queues);
+               dev->queues = NULL;
                return NULL;
        }