This patch fixes an issue that the usb_dmac_desc_free() is
dereferencing freed memory 'desc' because it uses list_for_each_entry().
This function should use list_for_each_entry_safe().
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
static void usb_dmac_desc_free(struct usb_dmac_chan *chan)
{
- struct usb_dmac_desc *desc;
+ struct usb_dmac_desc *desc, *_desc;
LIST_HEAD(list);
list_splice_init(&chan->desc_freed, &list);
list_splice_init(&chan->desc_got, &list);
- list_for_each_entry(desc, &list, node) {
+ list_for_each_entry_safe(desc, _desc, &list, node) {
list_del(&desc->node);
kfree(desc);
}