mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
iommu/amd: Check if domain is NULL in get_domain() and return -EBUSY
In get_domain(), 'domain' could be NULL before it's passed to dma_ops_domain()
to dereference. And the current code calling get_domain() can't deal with the
returned 'domain' well if its value is NULL.
So before dma_ops_domain() calling, check if 'domain' is NULL, If yes just return
ERR_PTR(-EBUSY) directly.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: df3f7a6e8e
('iommu/amd: Use is_attach_deferred call-back')
Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
parent
2479c631d1
commit
ec62b1ab0f
1 changed files with 3 additions and 0 deletions
|
@ -2472,6 +2472,9 @@ static struct protection_domain *get_domain(struct device *dev)
|
|||
domain = to_pdomain(io_domain);
|
||||
attach_device(dev, domain);
|
||||
}
|
||||
if (domain == NULL)
|
||||
return ERR_PTR(-EBUSY);
|
||||
|
||||
if (!dma_ops_domain(domain))
|
||||
return ERR_PTR(-EBUSY);
|
||||
|
||||
|
|
Loading…
Reference in a new issue