5.4-stable review patch. If anyone has any objections, please let me know.
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From: Ben Hutchings benh@debian.org
[ Upstream commit 919ddf8336f0b84c0453bac583808c9f165a85c2 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/aacraid/comminit.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c index d4fcfa1e54e02..8849eca08a494 100644 --- a/drivers/scsi/aacraid/comminit.c +++ b/drivers/scsi/aacraid/comminit.c @@ -638,6 +638,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev)
if (aac_comm_init(dev)<0){ kfree(dev->queues); + dev->queues = NULL; return NULL; } /* @@ -645,6 +646,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev) */ if (aac_fib_setup(dev) < 0) { kfree(dev->queues); + dev->queues = NULL; return NULL; }