Please ignore the first submitted patch. I forgot to remove the memset(mem, 0, size); statement. Please use this patch instead. Sorry about that....
This patch replaces vmalloc_32 with vmalloc_32_user. Allocating virtually contiguous memory (32bit addressable) which is zeroed so it can be mapped to userspace without leaking data.
Signed-off-by: Dwaine P. Garden <DwaineGarden@xxxxxxxxxx>
This patch replaces vmalloc_32 with vmalloc_32_user. Allocating virtually contiguous memory (32bit addressable) which is zeroed so it can be mapped to userspace without leaking data.
Signed-off-by: Dwaine P. Garden <DwaineGarden@xxxxxxxxxx>
diff -U 3 -H -d -r -N -- a/linux/drivers/media/video/usbvision/usbvision-core.c b/linux/drivers/media/video/usbvision/usbvision-core.c
--- a/linux/drivers/media/video/usbvision/usbvision-core.c 2007-01-15 19:11:11.000000000 -0500
+++ b/linux/drivers/media/video/usbvision/usbvision-core.c 2007-01-15 21:38:31.000000000 -0500
@@ -131,11 +131,10 @@
unsigned long adr;
size = PAGE_ALIGN(size);
- mem = vmalloc_32(size);
+ mem = vmalloc_32_user(size);
if (!mem)
return NULL;
- memset(mem, 0, size); /* Clear the ram out, no junk to the user */
adr = (unsigned long) mem;
while (size > 0) {
SetPageReserved(vmalloc_to_page((void *)adr));
@@ -414,7 +413,7 @@
int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
{
- usbvision->scratch = vmalloc_32(scratch_buf_size);
+ usbvision->scratch = vmalloc_32_user(scratch_buf_size);
scratch_reset(usbvision);
if(usbvision->scratch == NULL) {
err("%s: unable to allocate %d bytes for scratch",
@@ -525,7 +524,7 @@
int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
{
int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
- usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
+ usbvision->IntraFrameBuffer = vmalloc_32_user(IFB_size);
if (usbvision->IntraFrameBuffer == NULL) {
err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
return -ENOMEM;
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