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usbtrans: Fix memory coherence and use-after-free.

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This commit is contained in:
Vladimir Serbinenko 2016-02-23 12:07:01 +01:00
parent 0f076d75d0
commit ca028db3d4
1 changed files with 19 additions and 5 deletions
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24
grub-core/bus/usb/usbtrans.c
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@ -24,6 +24,7 @@
#include <grub/usb.h>
#include <grub/usbtrans.h>
#include <grub/time.h>
#include <grub/cache.h>
static inline unsigned int
@ -101,6 +102,8 @@ grub_usb_control_msg (grub_usb_device_t dev,
data_addr = grub_dma_get_phys (data_chunk);
grub_memcpy ((char *) data, data_in, size);
grub_arch_sync_dma_caches (data, size);
grub_dprintf ("usb",
"control: reqtype=0x%02x req=0x%02x val=0x%02x idx=0x%02x size=%lu\n",
reqtype, request, value, index, (unsigned long)size);
@ -161,6 +164,8 @@ grub_usb_control_msg (grub_usb_device_t dev,
setupdata->value = value;
setupdata->index = index;
setupdata->length = size;
grub_arch_sync_dma_caches (setupdata, sizeof (*setupdata));
transfer->transactions[0].size = sizeof (*setupdata);
transfer->transactions[0].pid = GRUB_USB_TRANSFER_TYPE_SETUP;
transfer->transactions[0].data = setupdata_addr;
@ -202,11 +207,13 @@ grub_usb_control_msg (grub_usb_device_t dev,
grub_free (transfer->transactions);
grub_free (transfer);
grub_dma_free (data_chunk);
grub_dma_free (setupdata_chunk);
grub_arch_sync_dma_caches (data, size0);
grub_memcpy (data_in, (char *) data, size0);
grub_dma_free (data_chunk);
return err;
}
@ -236,7 +243,10 @@ grub_usb_bulk_setup_readwrite (grub_usb_device_t dev,
data = grub_dma_get_virt (data_chunk);
data_addr = grub_dma_get_phys (data_chunk);
if (type == GRUB_USB_TRANSFER_TYPE_OUT)
grub_memcpy ((char *) data, data_in, size);
{
grub_memcpy ((char *) data, data_in, size);
grub_arch_sync_dma_caches (data, size);
}
/* Create a transfer. */
transfer = grub_malloc (sizeof (struct grub_usb_transfer));
@ -306,9 +316,13 @@ grub_usb_bulk_finish_readwrite (grub_usb_transfer_t transfer)
dev->toggle[transfer->endpoint] = toggle;
if (transfer->dir == GRUB_USB_TRANSFER_TYPE_IN)
grub_memcpy (transfer->data, (void *)
grub_dma_get_virt (transfer->data_chunk),
transfer->size + 1);
{
grub_arch_sync_dma_caches (grub_dma_get_virt (transfer->data_chunk),
transfer->size + 1);
grub_memcpy (transfer->data, (void *)
grub_dma_get_virt (transfer->data_chunk),
transfer->size + 1);
}
grub_free (transfer->transactions);
grub_dma_free (transfer->data_chunk);